US20190212588A1 - Systems and Methods for Manufacturing Waveguide Cells - Google Patents
Systems and Methods for Manufacturing Waveguide Cells Download PDFInfo
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- US20190212588A1 US20190212588A1 US16/203,071 US201816203071A US2019212588A1 US 20190212588 A1 US20190212588 A1 US 20190212588A1 US 201816203071 A US201816203071 A US 201816203071A US 2019212588 A1 US2019212588 A1 US 2019212588A1
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F1/13342—Holographic polymer dispersed liquid crystals
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/024—Hologram nature or properties
- G03H1/0248—Volume holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12107—Grating
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12116—Polariser; Birefringent
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12166—Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
- G02B2207/101—Nanooptics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
- G02B5/1871—Transmissive phase gratings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1326—Liquid crystal optical waveguides or liquid crystal cells specially adapted for gating or modulating between optical waveguides
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2260/00—Recording materials or recording processes
- G03H2260/30—Details of photosensitive recording material not otherwise provided for
- G03H2260/34—Non uniform thickness
Definitions
- the present invention generally relates to processes and apparatuses for manufacturing waveguide cells and, more specifically, manufacturing waveguide cells utilizing deposition and printing techniques.
- Waveguides can be referred to as structures with the capability of confining and guiding waves (i.e., restricting the spatial region in which waves can propagate).
- One class of waveguides includes optical waveguides, which are structures that can guide electromagnetic waves, typically those in the visible spectrum.
- Waveguide structures can be designed to control the propagation path of waves using a number of different mechanisms.
- planar waveguides can be designed to utilize diffraction gratings to diffract and couple incident light into the waveguide structure such that the in-coupled light can proceed to travel within the planar structure via total internal reflection (“TIR”).
- TIR total internal reflection
- Fabrication of waveguides can include the use of material systems that allow for the recording of holographic optical elements within the waveguides.
- One class of such material includes polymer dispersed liquid crystal (“PDLC”) mixtures, which are mixtures containing photopolymerizable monomers and liquid crystals.
- PDLC polymer dispersed liquid crystal
- HPDLC holographic polymer dispersed liquid crystal
- Holographic optical elements such as volume phase gratings, can be recorded in such a liquid mixture by illuminating the material with two mutually coherent laser beams.
- the monomers polymerize and the mixture undergoes a photopolymerization-induced phase separation, creating regions densely populated by liquid crystal micro-droplets, interspersed with regions of clear polymer.
- the alternating liquid crystal-rich and liquid crystal-depleted regions form the fringe planes of the grating.
- Waveguide optics such as those described above, can be considered for a range of display and sensor applications.
- waveguides containing one or more grating layers encoding multiple optical functions can be realized using various waveguide architectures and material systems, enabling new innovations in near-eye displays for Augmented Reality (“AR”) and Virtual Reality (“VR”), compact Heads Up Displays (“HUDs”) for aviation and road transport, and sensors for biometric and laser radar (“LIDAR”) applications.
- AR Augmented Reality
- VR Virtual Reality
- HUDs compact Heads Up Displays
- LIDAR biometric and laser radar
- One embodiment includes a method for manufacturing waveguide cells, the method including providing a first substrate, determining a predefined grating characteristic, and depositing a layer of optical recording material onto the first substrate using at least one deposition head, wherein the optical recording material deposited over the grating region is formulated to achieve the predefined grating characteristic.
- the method further includes providing a second substrate, placing the second substrate onto the deposited layer of optical recording material, and laminating the first substrate, the layer of optical recording material, and the second substrate.
- depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, and depositing the first and second mixtures of optical recording material onto the first substrate in a predetermined pattern using the at least one deposition head.
- the first mixture of optical recording material includes a first bead and the second mixture of optical recording material includes a second bead that is a different size from the first bead.
- the first mixture of optical recording material has a different percentage by weight of liquid crystals than the second mixture of optical recording material.
- the method further includes defining a grating region and a nongrating region on the first substrate, wherein the first mixture of optical recording material includes a liquid crystal and a monomer, the second mixture of optical recording material includes a monomer, and depositing the first and second mixtures of optical recording material onto the first substrate in the predetermined pattern includes depositing the first mixture of optical recording material over the grating region and depositing the second mixture of optical recording material over the nongrating region.
- the first mixture of optical recording material is a polymer dispersed liquid crystal mixture that includes a monomer, a liquid crystal, a photoinitiator dye, and a coinitiator.
- the polymer dispersed liquid crystal mixture includes an additive selected from the group that includes a photoinitiator, nano particles, low-functionality monomers, additives for reducing switching voltage, additives for reducing switching time, additives for increasing refractive index modulation, and additives for reducing haze.
- the at least one deposition head includes at least one inkjet print head.
- depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, printing a first dot of the first mixture of optical recording material using the at least one inkjet print head, and printing a second dot of the second mixture of optical recording material adjacent to the first dot using the at least one inkjet print head.
- the at least one inkjet print head includes a first inkjet print head and a second inkjet print head and depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, printing the first mixture of optical recording material onto the first substrate using the first inkjet print head, and printing the second mixture of optical recording material onto the first substrate using the second inkjet print head.
- the predefined grating characteristic includes a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- the predefined grating characteristic includes a spatial variation of a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- the predefined grating characteristic results in a grating after exposure, wherein the grating has a spatially varying diffraction efficiency.
- a still further additional embodiment includes a system for fabricating a grating, the system including at least one deposition head connected to at least one reservoir containing at least one mixture of optical recording material, a first substrate having at least one predefined region for supporting gratings, a positioning element capable of positioning the at least one deposition head across the first substrate, wherein the at least one deposition head is configured to deposit the at least one mixture of optical recording material onto the first substrate using the positioning element and the deposited material provides a predefined grating characteristic within the at least one predefined grating region after holographic exposure.
- the at least one deposition head is connected to a first reservoir containing a first mixture of optical recording material and a second reservoir containing a second mixture of optical recording material.
- the first mixture of optical recording material includes a liquid crystal and a monomer and the second mixture of optical recording material includes a monomer, wherein the at least one deposition head is configured to deposit the first mixture of optical recording material onto the at least one predefined grating region.
- the at least one deposition head includes at least one inkjet print head.
- the predefined grating characteristic includes a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- the predefined grating characteristic results in a grating after exposure, wherein the grating has a spatially varying diffraction efficiency.
- FIG. 1A conceptually illustrates a profile view of a waveguide cell in accordance with an embodiment of the invention.
- FIG. 1B conceptually illustrates a waveguide cell with a wedge-shaped profile in accordance with an embodiment of the invention.
- FIG. 1C conceptually illustrates a top view of a waveguide cell in accordance with an embodiment of the invention.
- FIG. 2A conceptually illustrates a workcell cluster system in accordance with an embodiment of the invention.
- FIG. 2B conceptually illustrates a workcell cluster system with two deposition workcells in accordance with an embodiment of the invention.
- FIG. 3A conceptually illustrates an isometric view of a deposition workcell in accordance with an embodiment of the invention.
- FIG. 3B conceptually illustrates a top view of a deposition workcell in accordance with an embodiment of the invention.
- FIGS. 4A and 4B conceptually illustrate schematically the use of reverse ray tracing to compute a compensated index modulation pattern for coating in accordance with various embodiments of the invention.
- FIGS. 5A and 5B conceptually illustrate the fundamental structural differences between SBGs and SRGs.
- FIG. 6 conceptually illustrates a waveguide cell with marked areas for gratings in accordance with an embodiment of the invention.
- FIGS. 7A and 7B conceptually illustrate operation of a deposition mechanism utilizing a spray module in accordance with an embodiment of the invention.
- FIGS. 8A and 8B conceptually illustrate two operational states of a spray module in accordance with an embodiment of the invention.
- FIG. 9 is a flow chart conceptually illustrating a method of fabricating a holographic grating using a selective coating process in accordance with an embodiment of the invention.
- FIG. 10 conceptually illustrates a deposition head for providing predefined grating characteristics within grating regions in accordance with an embodiment of the invention.
- FIG. 11 conceptually illustrates operation of a deposition head for depositing material having regions with predefined grating characteristics in accordance with an embodiment of the invention.
- FIG. 12 conceptually illustrates a deposition mechanism for depositing two grating layers in accordance with an embodiment of the invention.
- FIG. 13 conceptually illustrates a system for depositing a grating layer of material and for holographically exposing the layer in accordance with an embodiment of the invention.
- FIG. 14 is a flow chart conceptually illustrating a method of depositing a film of material with regions having predefined grating characteristics in accordance with an embodiment of the invention.
- FIG. 15 conceptually illustrates an inkjet printing modulation scheme in accordance with an embodiment of the invention.
- the term “on-axis” in relation to a ray or a beam direction refers to propagation parallel to an axis normal to the surfaces of the optical components described in relation to the invention.
- the terms light, ray, beam and direction may be used interchangeably and in association with each other to indicate the direction of propagation of light energy along rectilinear trajectories. Parts of the following description will be presented using terminology commonly employed by those skilled in the art of optical design. For illustrative purposes, it is to be understood that the drawings are not drawn to scale unless stated otherwise.
- a waveguide cell can be defined as a device containing uncured and/or unexposed optical recording material in which optical elements, such as but not limited to gratings, can be recorded through exposure to certain wavelengths of electromagnetic radiation.
- optical elements such as but not limited to gratings
- a waveguide cell is constructed by placing a thin film of optical recording material between two transparent substrates.
- a workcell cluster manufacturing system is implemented to construct such waveguide cells.
- a workcell can be defined as a set of machines assigned to a particular manufacturing task.
- a cluster can be defined as a group of machines that performs a similar function cooperatively.
- the workcell cluster includes a preparation workcell for preparing substrates for deposition, a deposition workcell for depositing an optical recording material onto a substrate, and a lamination workcell for laminating various layers together to form a waveguide cell.
- preparation workcells can be configured to prepare substrates for material deposition through various processes, including but not limited to cleaning procedures and protocols.
- the preparation of substrates includes glass cleaning procedures for ridding the surfaces of the substrates of contaminants and particles.
- procedures for increasing the surface adhesion properties of the substrates are implemented to further prepare the substrates for material deposition.
- Deposition workcells can be configured to deposit one or more layers of optical recording material onto a transparent substrate using a variety of different deposition and printing mechanisms.
- additive manufacturing techniques such as but not limited to inkjet printing, are used to deposit the layer(s) of optical recording material.
- spraying techniques are utilized to deposit the layer(s) of optical recording material.
- Suitable optical recording material can vary widely depending on the given application.
- the optical recording material deposited has a similar composition throughout the layer.
- the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.
- Lamination workcells can be configured to laminate various layers to form a waveguide cell.
- the lamination workcell is configured to laminate and form a three-layer composite of optical recording material and transparent substrates.
- the number of layers and types of materials used to construct the waveguide cells can vary and depend on the given application.
- waveguide cells can be constructed to include protective cover layers, polarization control layers, and/or alignment layers.
- the system is configured for the production of curved waveguides and waveguide cells. Specific materials, systems, and methods for constructing waveguide cells are discussed below in further detail.
- Waveguide cells can be configured and constructed in many different ways in accordance with various embodiments of the invention.
- the waveguide cell includes a thin film of optical recording material sandwiched between two substrates.
- Such waveguide cells can be manufactured using various processes.
- waveguide cells can be constructed by coating a first substrate with an optical recording material capable of acting as an optical recording medium.
- the optical recording material is a holographic polymer dispersed liquid crystal mixture (e.g., a matrix of liquid crystal droplets).
- the choice of optical recording material and types of mixtures utilized can depend on the given application.
- the optical recording material can be deposited using a variety of deposition techniques.
- the optical recording material can be deposited onto the first substrate through inkjetting, spin coating, and/or spraying processes.
- the deposition processes can be configured to deposit one or more type of optical recording material.
- the deposition process is configured to deposit optical recording material that spatially varies in composition across a substrate.
- a second substrate can be placed such that the optical recording material is sandwiched between the two substrates to form a waveguide cell.
- the second substrate can be a thin protective film coated onto the exposed layer.
- various techniques including but not limited to spraying processes, can be used to coat the exposed layer with the desired film of material.
- the waveguide cell can include various additional layers, such as but not limited to polarization control layers and/or alignment layers.
- Other processes for manufacturing waveguide cells can include filling empty waveguide cells (constructed of two substrates) with an optical recording material using processes such as but not limited to gravity filling and vacuum filling methods.
- Substrates used in the construction of waveguide cells are often made of transparent materials.
- the substrate is an optical plastic.
- the substrate may be fabricated from glass.
- An exemplary glass substrate is standard Corning Willow glass substrate (index 1.51) which is available in thicknesses down to 50 micrometers. The thicknesses of the substrates can vary from application to application. In many embodiments, 1 mm thick glass slides are used as the substrates.
- substrates of different shapes such as but not limited to rectangular and curvilinear shapes, can also be used depending on the application. Oftentimes, the shapes of the substrates can determine the overall shape of the waveguide.
- the waveguide cell contains two substrates that are of the same shape. In other embodiments, the substrates are of different shapes. As can readily be appreciated, the shapes, dimensions, and materials of the substrates can vary and depend on the specific requirements of a given application.
- beads or other particles are dispersed throughout the optical recording material to help control the thickness of the layer of optical recording material and to help prevent the two substrates from collapsing onto one another.
- the waveguide cell is constructed with an optical recording material layer sandwiched between two planar substrates. Depending on the type of optical recording material used, thickness control can be difficult to achieve due to the viscosity of some optical recording materials and the lack of a bounding edge for the optical recording material layer.
- the beads are relatively incompressible solids, which can allow for the construction of waveguide cells with consistent thicknesses. The size of a bead can determine a localized minimum thickness for the area around the individual bead.
- the dimensions of the beads can be selected to help attain the desired optical recording material layer thickness.
- the beads can be made of any of a variety of materials, including but not limited to glass and plastics.
- the material of the beads is selected such that its refractive index does not substantially affect the propagation of light within the waveguide cell.
- the waveguide cell is constructed such that the two substrates are parallel or substantially parallel. In such embodiments, relatively similar sized beads can be dispersed throughout the optical recording material to help attain a uniform thickness throughout the layer.
- the waveguide cell has a tapered profile.
- a tapered waveguide cell can be constructed by dispersing beads of different sizes across the optical recording material. As discussed above, the size of a bead can determine the local minimum thickness of the optical recording material layer. By dispersing the beads in a pattern of increasing size across the material layer, a tapered layer of optical recording material can be formed when the material is sandwiched between two substrates.
- waveguide cells can be used in conjunction with a variety of processes for recording optical elements within the optical recording material.
- the process disclosed may incorporated embodiments and teachings from the materials and processes, such as but not limited to those described in U.S. patent application Ser. No. 16/116,834 entitled “Systems and Methods for High-Throughput Recording of Holographic Gratings in Waveguide Cells,” filed Aug. 29, 2018 and U.S. patent application Ser. No. 16/007,932 entitled “Holographic Material Systems and Waveguides Incorporating Low Functionality Monomers,” filed Jun. 13, 2018
- the disclosures of U.S. patent application Ser. Nos. 16/116,834 and 16/007,932 are hereby incorporated in their entireties for all purpose.
- FIG. 1A A profile view of a waveguide cell 100 in accordance with an embodiment of the invention is conceptually illustrated in FIG. 1A .
- the waveguide cell 100 includes a layer of optical recording material 102 that can be used as a recording medium for optical elements, such as but not limited to gratings.
- the optical recording material 102 can be any of a variety of compounds, mixtures, or solutions, such as but not limited to the HPDLC mixtures described in the sections above.
- the optical recording material 102 is sandwich between two parallel glass plates 104 , 106 .
- the substrates can be arranged in both parallel and non-parallel configurations.
- FIG. 1A A profile view of a waveguide cell 100 in accordance with an embodiment of the invention is conceptually illustrated in FIG. 1A .
- the waveguide cell 100 includes a layer of optical recording material 102 that can be used as a recording medium for optical elements, such as but not limited to gratings.
- the optical recording material 102 can be any of a variety of
- FIG. 1B conceptually illustrates a profile view of a tapered waveguide cell 108 utilizing beads 110 , 112 , and 114 in accordance with an embodiment of the invention.
- beads 110 , 112 , and 114 vary in size and are dispersed throughout an optical recording material 116 sandwiched by two glass plates 118 , 120 .
- the local thickness of an area of the optical recording material layer is limited by the sizes of the beads in that particular area.
- a tapered waveguide cell can be constructed when the substrates are placed in contact with the beads.
- substrates utilized in waveguide cells can vary in thicknesses and shapes. In many embodiments, the substrate is rectangular in shape.
- the shape of the waveguide cell is a combination of curvilinear components.
- FIG. 1C conceptually illustrates a top view of a waveguide cell 122 having a curvilinear shape in accordance with an embodiment of the invention.
- FIGS. 1A-1C illustrate specific waveguide cell constructions and arrangements
- waveguide cells can be constructed in many different configurations and can use a variety of different materials depending on the specific requirements of a given application.
- substrates can be made of transparent plastic polymers instead of glass.
- the shapes and sizes of the waveguide cells can vary greatly and can be determined by various factors, such as but not limited to the application of the waveguide, ergonomic considerations, and economical factors.
- the substrates are curved, allowing for the production of waveguides with curved cross sections.
- Waveguide cells in accordance with various embodiments of the invention can incorporate a variety of light-sensitive materials.
- the waveguide cell incorporates a holographic polymer dispersed liquid crystal mixture that functions as an optical recording medium in which optical elements can be recorded.
- Optical elements can include many different types of gratings capable of exhibiting different optical properties.
- One type of grating that can be recorded in waveguide cells is a volume Bragg grating, which can be characterized as a transparent medium with a periodic variation in its refractive index. This variation can allow for the diffraction of incident light of certain wavelengths at certain angles.
- Volume Bragg gratings can have high efficiency with little light being diffracted into higher orders. The relative amount of light in the diffracted and zero order can be varied by controlling the refractive index modulation of the grating.
- SBG Switchable Bragg Grating
- An SBG is a diffractive device that can be formed by recording a volume phase grating in an HPDLC mixture (although other materials can be used).
- SBGs can be fabricated by first placing a thin film of a mixture of photopolymerizable monomers and liquid crystal material between glass plates or substrates, which forms a waveguide cell.
- One or both glass plates can support electrodes, typically transparent tin oxide films, for applying an electric field across the film.
- SBGs can be implemented as waveguide devices in which the HPDLC forms either the waveguide core or an evanescently coupled layer in proximity to the waveguide.
- the glass plates used to form the HPDLC cell can provide a total internal reflection light guiding structure. Light is coupled out of the SBG when the switchable grating diffracts the light at an angle beyond the TIR condition.
- the grating structure in an SBG can be recorded in the film of HPDLC material through photopolymerization-induced phase separation using interferential exposure with a spatially periodic intensity modulation. Factors such as but not limited to control of the irradiation intensity, component volume fractions of the HPDLC material, and exposure temperature can determine the resulting grating morphology and performance.
- the monomers polymerize and the mixture undergoes a phase separation.
- the LC molecules aggregate to form discrete or coalesced droplets that are periodically distributed in polymer networks on the scale of optical wavelengths.
- the alternating liquid crystal-rich and liquid crystal-depleted regions form the fringe planes of the grating, which can produce Bragg diffraction with a strong optical polarization resulting from the orientation ordering of the LC molecules in the droplets.
- the resulting volume phase grating can exhibit very high diffraction efficiency, which may be controlled by the magnitude of the electric field applied across the HPDLC layer.
- an electric field is applied to the hologram via transparent electrodes, the natural orientation of the LC droplets is changed, causing the refractive index modulation of the fringes to reduce and the hologram diffraction efficiency to drop to very low levels.
- the diffraction efficiency of the device can be adjusted, by means of the applied voltage, over a continuous range from near 100% efficiency with no voltage applied to essentially zero efficiency with a sufficiently high voltage applied.
- phase separation of the LC material from the polymer can be accomplished to such a degree that no discernible droplet structure results.
- An SBG can also be used as a passive grating. In this mode, its chief benefit is a uniquely high refractive index modulation.
- SBGs can be used to provide transmission or reflection gratings for free space applications.
- SBGs can be implemented as waveguide devices in which the HPDLC forms either the waveguide core or an evanescently coupled layer in proximity to the waveguide.
- the glass plates used to form the HPDLC cell provide a total internal reflection light guiding structure. Light can be coupled out of the SBG when the switchable grating diffracts the light at an angle beyond the TIR condition.
- SBGs are recorded in a uniform modulation material, such as POLICRYPS or POLIPHEM having a matrix of solid liquid crystals dispersed in a liquid polymer.
- a uniform modulation material such as POLICRYPS or POLIPHEM having a matrix of solid liquid crystals dispersed in a liquid polymer.
- Exemplary uniform modulation liquid crystal-polymer material systems are disclosed in United State Patent Application Publication No.: US2007/0019152 by Caputo et al and PCT Application No.: PCT/EP2005/006950 by Stumpe et al. both of which are incorporated herein by reference in their entireties.
- Uniform modulation gratings are characterized by high refractive index modulation (and hence high diffraction efficiency) and low scatter.
- at least one of the gratings is recorded a reverse mode HPDLC material.
- Reverse mode HPDLC differs from conventional HPDLC in that the grating is passive when no electric field is applied and becomes diffractive in the presence of an electric field.
- the reverse mode HPDLC may be based on any of the recipes and processes disclosed in PCT Application No.: PCT/GB2012/000680, entitled IMPROVEMENTS TO HOLOGRAPHIC POLYMER DISPERSED LIQUID CRYSTAL MATERIALS AND DEVICES. Optical recording material systems are discussed below in further detail.
- HPDLC mixtures in accordance with various embodiments of the invention generally include LC, monomers, photoinitiator dyes, and coinitiators.
- the mixture (often referred to as syrup) frequently also includes a surfactant.
- a surfactant is defined as any chemical agent that lowers the surface tension of the total liquid mixture.
- the use of surfactants in PDLC mixtures is known and dates back to the earliest investigations of PDLCs. For example, a paper by R. L Sutherland et al., SPIE Vol.
- Acrylates offer the benefits of fast kinetics, good mixing with other materials, and compatibility with film forming processes. Since acrylates are cross-linked, they tend to be mechanically robust and flexible. For example, urethane acrylates of functionality 2 ( di ) and 3 (tri) have been used extensively for HPDLC technology. Higher functionality materials such as penta and hex functional stems have also been used.
- HPDLC mixtures with specific components are discussed above in relation with their suitable uses as the optical recording material in a waveguide cell
- specific formulations of optical recording materials can vary widely and can depend on the specific requirements of a given application. Such considerations can include diffraction efficiency (“DE”), haze, solar immunity, transparency, and switching requirements.
- DE diffraction efficiency
- the S and P polarization response of a grating containing LC can depend on the average LC director orientations relative to the grating K-vector.
- the directors are substantially parallel to the K-vector, giving a strong P-response and a weaker S-response. If the LC directors are not aligned, the grating can have a strong S-response.
- RLCM reactive monomer liquid crystal mixture
- monomers and other components including: photoinitiator dye, coinitiators, surfactant
- photoinitiator dye coinitiators
- surfactant which under holographic exposure undergo phase separation to provide a grating in which at least one of the LCs and at least one of the monomers form a first HPDLC morphology that provides a P polarization response and at least one of the LCs and at least one of the monomers form a second HPDLC morphology that provides a S polarization response.
- the material systems include an RMLCM, which includes photopolymerizable monomers composed of suitable functional groups (e.g., acrylates, mercapto-, and other esters, among others), a cross-linking agent, a photo-initiator, a surfactant and a liquid crystal.
- suitable functional groups e.g., acrylates, mercapto-, and other esters, among others
- cross-linking agent e.g., acrylates, mercapto-, and other esters, among others
- surfactant e.g., acrylates, mercapto-, and other esters, among others
- any encapsulating polymer formed from any single photo-reactive monomer material or mixture of photo-reactive monomer materials having refractive indices from about 1.5 to 1.9 that crosslink and phase separate when combined can be utilized.
- Exemplary monomer functional groups usable in material formulations according to embodiments include, but are not limited to, acrylates, thiol-ene, thiol-ester, fluoromonomers, mercaptos, siloxane-based materials, and other esters, etc.
- Polymer cross-linking can be achieved through different reaction types, including but not limited to optically-induced photo-polymerization, thermally-induced polymerization, and chemically-induced polymerization.
- photopolymerizable materials can be combined in a biphase blend with a second liquid crystal material.
- a second liquid crystal material Any suitable liquid crystal material having ordinary and extraordinary refractive indices matched to the polymer refractive index can be used as a dopant to balance the refractive index of the final RMLCM material.
- the liquid crystal material can be manufactured, refined, or naturally occurring.
- the liquid crystal material includes all known phases of liquid crystallinity, including the nematic and smectic phases, the cholesteric phase, the lyotropic discotic phase.
- the liquid crystal can exhibit ferroelectric or antiferroelectric properties and/or behavior.
- any suitable photoinitiator, co-initiator, chain extender and surfactant (such as for example octanoic acid) suitable for use with the monomer and LC materials can be used in the RMLCM material formulation. It will be understood that the photo-initiator can operate in any desired spectral band including the in the UV and/or in the visible band.
- the LCs can interact to form an LC mixture in which molecules of two or more different LCs interact to form a non-axial structure which interacts with both S and P polarizations.
- the waveguide can also contain an LC alignment material for optimizing the LC alignment for optimum S and P performance.
- the ratio of the diffraction efficiencies of the P- and S-polarized light in the PDLC morphology is maintained at a relative ratio of from 1.1:1 to 2:1, and in some embodiments at around 1.5:1.
- the measured diffraction efficiency of P-polarized light is from greater than 20% to less than 60%, and the diffraction efficiency for S-polarized light is from greater than 10% to less than 50%, and in some embodiments the diffraction efficiency of the PDLC morphology for P-polarization is around 30% and the diffraction efficiency of the PDLC morphology for S-polarization is around 20%. This can be compared with conventional PDLC morphologies where the diffraction efficiency for P-polarization is around 60% and for S-polarization is around 1 (i.e., the conventional P-polarization materials have very low or negligible S-components).
- the reactive monomer liquid crystal mixture can further include chemically active nanoparticles disposed within the LC domains.
- the nanoparticles are carbon nanotube (“CNT”) or nanoclay nanoparticle materials within the LC domains.
- CNT carbon nanotube
- Embodiments are also directed to methods for controlling the nanoclay particle size, shape, and uniformity. Methods for blending and dispersing the nanoclay particles can determine the resulting electrical and optical properties of the device. The use of nanoclays in HPDLC is discussed in PCT Application No.: PCT/GB2012/000680, entitled IMPROVEMENTS TO HOLOGRAPHIC POLYMER DISPERSED LIQUID CRYSTAL MATERIALS AND DEVICES.
- the nanoclay nanoparticles can be formed from any naturally occurring or manufactured composition, as long as they can be dispersed in the liquid crystal material.
- the specific nanoclay material to be selected depends upon the specific application of the film and/or device.
- the concentration and method of dispersion also depends on the specific application of the film and/or device.
- the liquid crystal material is selected to match the liquid crystal ordinary index of refraction with the nanoclay material.
- the resulting composite material can have a forced alignment of the liquid crystal molecules due to the nanoclay particle dispersion, and the optical quality of the film and/or device can be unaffected.
- the composite mixture which includes the liquid crystal and nanoclay particles, can be mixed to an isotropic state by ultrasonication.
- the mixture can then be combined with an optically crosslinkable monomer, such as acrylated or urethane resin that has been photoinitiated, and sandwiched between substrates to form a cell (or alternatively applied to a substrate using a coating process).
- nanoparticles are composed of nanoclay nanoparticles, preferably spheres or platelets, with particle size on the order of 2-10 nanometers in the shortest dimension and on the order of 10 nanometers in the longest dimension.
- the liquid crystal material is selected to match the liquid crystal ordinary index of refraction with the nanoclay material.
- the nanoparticles can be composed of material having ferroelectric properties, causing the particles to induce a ferroelectric alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device.
- the nanoparticles are composed of material having ferromagnetic properties, causing the particles to induce a ferromagnetic alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device.
- the nanoparticles have an induced electric or magnetic field, causing the particles to induce an alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device.
- Exemplary nanoparticles used in other contexts including thermoplastics, polymer binders, etc. are disclosed in U.S. Pat. Nos. 7,068,898; 7,046,439; 6,323,989; 5,847,787; and U.S. Patent Pub. Nos. 2003/0175004; 2004/0156008; 2004/0225025; 2005/0218377; and 2006/0142455, the disclosures of which are incorporated herein by reference.
- the nanoclay can be used with its naturally occurring surface properties, or the surface can be chemically treated for specific binding, electrical, magnetic, or optical properties.
- the nanoclay particles will be intercalated, so that they disperse uniformly in the liquid crystalline material.
- the generic term “nanoclay” as used in the discussion of the present invention can refer to naturally occurring montmorillonite nanoclay, intercalated montmorillonite nanoclay, surface modified montmorillonite nanoclay, and surface treated montmorillonite nanoclay.
- the nanoparticles can be useable as commercially purchased, or they may need to be reduced in size or altered in morphology.
- the processes that can be used include chemical particle size reduction, particle growth, grinding of wet or dry particles, milling of large particles or stock, vibrational milling of large particles or stock, ball milling of particles or stock, centrifugal ball milling of particles or stock, and vibrational ball milling of particles or stock. All of these techniques can be performed either dry or with a liquid suspension.
- the liquid suspension can be a buffer, a solvent, an inert liquid, or a liquid crystal material.
- Spex LLC Metaluchen, N.J.
- Retsch France
- the nanoparticles can be dispersed in the liquid crystal material prior to polymer dispersion. Dry or solvent suspended nanoparticles can be ultrasonically mixed with the liquid crystal material or monomers prior to polymer dispersion to achieve an isotropic dispersion. Wet particles may need to be prepared for dispersion in liquid crystal, depending on the specific materials used. If the particles are in a solvent or liquid buffer, the solution can be dried, and the dry particles dispersed in the liquid crystal as described above. Drying methods include evaporation in air, vacuum evaporation, purging with inert gas like nitrogen and heating the solution.
- the optical film includes a liquid crystal material and a nanoclay nanoparticle, where a nanoparticle is a particle of material with size less than one micrometer in at least one dimension.
- the film can be isotropically distributed.
- CNT is used as an alternative to nanoclay as a means for reducing voltage.
- the properties of CNT in relation to PDLC devices are reviewed by E. H. Kim et. al. in Polym. Int. 2010; 59: 1289-1295, the disclosure of which is incorporated herein by reference in its entirety.
- PDLC films have been fabricated with varying amounts of multi-walled carbon nanotubes (“MWCNTs”) to optimize the electro-optical performance of the PDLC films.
- MWCNTs multi-walled carbon nanotubes
- the MWCNTs were well dispersed in the prepolymer mixture up to 0.5 wt %, implying that polyurethane acrylate (“PUA”) oligomer chains wrap the MWCNTs along their length, resulting in high diffraction efficiency and good phase separation.
- PUA polyurethane acrylate
- the hardness and elastic modulus of the polymer matrix were enhanced with increasing amounts of MWCNTs because of the reinforcement effect of the MWCNTs with intrinsically good mechanical properties.
- the increased elasticity of the PUA matrix and the immiscibility between the matrix and the liquid crystals gradually increased the diffraction efficiency of the PDLC films.
- PDLC films with more than 0.05 wt % MWCNTs were reduced, caused by poor phase separation between the matrix and LCs because of the high viscosity of the reactive mixture.
- PDLC films showing a low driving voltage (75%) could be obtained with 0.05 wt % MWCNTs at 40 wt % LCs.
- the PDLC materials incorporate such nanoparticles
- reductions of switching voltage and improvements to the electro-optic properties of a polymer dispersed liquid crystal film and/or polymer dispersed liquid crystal device can be obtained by including nanoparticles in the liquid crystal domains.
- the inclusion of nanoparticles serves to align the liquid crystal molecules and to alter the birefringent properties of the film through index of refraction averaging.
- the inclusion of the nanoparticles improves the switching response of the liquid crystal domains.
- the material system is an RMLCM that includes at least one LC, at least one multi-functional monomer, a photo-initiator, a dye, and at least one mono-functional monomer.
- the specific mixture of components and their percent composition can determine the diffraction efficiency of the resulting HPDLC gratings.
- Inhomogeneous polymerization due to the spatially periodic irradiation intensity of the exposure can be the driving force to segregate monomers and LCs and to order the orientation of LC molecules, which can influence the diffraction efficiencies of the HPDLC gratings.
- the diffusion coefficient of monomers depends on their molecular weight and reactivity. It has been shown that a variety of monomer molecular weights or functional numbers can yield a complex distribution of polymer and LC phases. In many cases, molecular functionality can be critical in achieving efficient phase separation and the formation of gratings with high diffraction efficiency.
- many embodiments of the invention include material systems formulated with specific mixes of monomers that are chosen, at least in part, for their functionality so as to influence the diffraction efficiency and index modulation of the resulting grating structure.
- Other considerations in formulating such a mixture can include but are not limited to the properties of the recording beam and the thickness of the gratings.
- the functionality of a monomer refers to the number of reactive sites on each monomer unit.
- the monomers within the mixture are either mono-functional monomers or bi-functional monomers.
- tri-functional monomers are also included. In such mixtures, the tri-functional monomers are typically included at a low concentration, such as lower than 5 wt %.
- Mixtures including low functional monomers can behave differently depending on a variety of factors, such as but not limited to the wavelength sensitivity of the material system, thickness of the HPDLC to be formed, and exposure temperature.
- investigations into PDLC material systems typically include UV sensitive material systems since material reaction efficiency in general is typically poor with visible light systems.
- formulations in accordance with various embodiments of the invention have been able to reach high diffraction efficiency (>80%) with low haze using low functionality monomers that are sensitive (polymerizes) to visible light.
- the material systems include monomers that are sensitive to green light, such as light with wavelengths ranging from 495-570 nm.
- the material system is formulated for use in waveguides with thin form factors.
- the material system is formulated for use in manufacturing waveguides having HPDLC layers with thicknesses of less than 10 ⁇ m. and gratings with more than 80% diffraction efficiency.
- the material system is formulated for use in a waveguide having a 2-3 ⁇ m thick HPDLC layer and gratings with 80-90% diffraction efficiency.
- the material system can also be formulated for manufacturing such waveguides with low haze.
- the material system can form HPDLC layers having less than 1% haze.
- Waveguide haze is the integrated effect of light interacting with material and surface inhomogeneities over many beam bounces. The impact on the ANSI contrast, the ratio of averaged white to black measurements taken from a checkerboard pattern, can be dramatic owing to the scatter contribution to the black level.
- Haze is mostly due to wide-angle scatter by LC droplets and other small particles or scattering centers resulting from incomplete phase separation of the LC/monomer mixture during grating recording. Haze can also arise, at least partly, from narrow angle scatter generated by large-scale nonuniformities, leading to a loss of see-through quality and reduced image sharpness.
- Some waveguide applications such as aircraft HUDs, which use 1-D beam expansion in thick waveguides, produce as few as 7 bounces, allowing up to 80:1 contrast.
- the number of bounces may increase by a factor of 10 making the need for haze control more acute.
- RMLCM recipes can be optimized for specific thicknesses of HPDLC layers.
- the RMLCM recipe is optimized for a ⁇ 3 ⁇ m thick uniform modulation gratings designed to have a refractive index modulation of ⁇ 0.16.
- the specific thickness of the waveguide parts to be fabricated can vary and can depend on the specific requirements of a given application.
- the waveguide parts can be fabricated with 90% transmission and 0.3% haze.
- the waveguide parts can be fabricated with ⁇ 0.1% haze (with ⁇ 0.01% haze recorded in unexposed samples of the same material).
- the RMLCM can be formulated for fabricating waveguide parts containing haze of less than 0.05%.
- Transmission haze can be defined as the percentage of light that deviates from desired beam direction by more the 2.5 degrees on average (according to the ASTM D1003 standard).
- the clarity of a waveguide can be characterized by the amount of narrow angle scattered light (at an angle less than 2.5° from the normal to the waveguide surface). Transmission can be defined as the amount of light transmitted through the waveguide without being scattered.
- the scatter can be measured around a vector normal to a waveguide TIR surface.
- holographic haze the scatter can be measured around principal diffraction directions (passing through the center of the eye box).
- the RMLCM mixture includes a liquid crystal mixture, a complex mixture of acrylates and acrylate esters, Dynasylan® MEMO, and photoinitiators.
- the RMLCM includes EHA and DFHA. Depending on the specific mix of components and their percent composition, the resulting grating can have vastly different characteristics.
- the proportion of LC by weight is greater than 30%. In further embodiments, the proportion of LC is greater than 35 wt %.
- the mixture includes liquid crystal with high birefringence. In further embodiments, the high birefringence liquid crystal accounts for more than 20 wt % of the mixture. In a number of embodiments, dye and photo-initiators account for less than 5 wt % of the mixture.
- Nematic LC materials can provide a range of birefringence (which can translate to refractive index modulation).
- Low to medium birefringence typically covers the range of 0.09-0.12.
- gratings can be designed using much lower birefringence values, including gratings in which the birefringence varies along the grating. Such gratings can be used to extract light from waveguides with low efficiency at one end of the grating and high efficiency at the other end of the grating to provide spatially uniform output illumination.
- High birefringence is typically the range of 0.2-0.5. Even higher values are possible.
- Nematic liquid crystals, compounds, and mixtures with positive dielectric anisotropies i.e., LCs for which the dielectric constant is greater in the long molecular axis than that in the other directions
- LCs for which the dielectric constant is greater in the long molecular axis than that in the other directions
- the mixture includes at least one mono-functional monomer and at least one multifunctional monomer in varying concentrations.
- the concentration of mono-functional monomer within the mixture ranges from 1-50 wt %.
- the monofunctional monomer can include aliphatic/aromatic groups and an adhesion promoter.
- the proportion of multi-functional monomers present in the mixture is in the range of 2-30 wt %.
- Multi-functional monomers in accordance with various embodiments of the invention typically include monomers of low functionality.
- the mixture includes a bi-functional monomer at a low concentration.
- the mixture includes bi-functional monomers at less than 15 wt %. Depending on the type and concentration of bi-functional monomer in the mixture, adequate phase separation and grating formation can occur.
- the mono-functional monomer, bi-functional monomer and LC have relative weight ratios of 30%, 14%, and 40%, which resulted in a formulation that allowed for the recording of gratings with a diffraction efficiency higher than 90% and an index modulation of around 0.12.
- percent composition of each component within an RMLCM can vary widely. Formulations of such material systems can be designed to achieve certain characteristics in the resulting gratings. In many cases, the RMLCM is formulated to have as high a diffraction efficiency as possible.
- Waveguide cell manufacturing systems in accordance with various embodiments of the invention can be implemented as workcell clusters. By compartmentalizing different manufacturing steps into workcells, modular systems can be implemented.
- a workcell cluster includes a preparation workcell for preparing substrates for material deposition, a deposition workcell for depositing an optical recording material onto a substrate, and a lamination workcell for laminating various layers together to construct a waveguide cell.
- Workcells can be configured in various ways to implement different manufacturing processes for waveguide cells. In some embodiments, the workcells are linked and configured such that the output of one workcell is transferred to another workcell, forming a manufacturing assembly line.
- FIG. 2A conceptually illustrates a workcell cluster system 200 in accordance with an embodiment of the invention.
- the system 200 includes a preparation workcell 202 , a deposition workcell 204 , and a lamination workcell 206 .
- arrows 208 indicate a sequential workflow relationship among the workcells.
- FIG. 2B conceptually illustrates a workcell cluster system 210 with two deposition workcells 212 , 214 in accordance with an embodiment of the invention.
- the system 210 includes a preparation workcell 216 , two deposition workcells 212 , 214 , and a lamination workcell 218 .
- Dotted arrows 220 indicate that output from the preparation workcell 216 can be received by either deposition workcell 212 , 214 .
- Such a system can be ideally implemented when the completion time for a single deposition process is approximately twice as long as the completion time for other processes.
- FIGS. 2A and 2B conceptually illustrate specific workcell cluster system configurations
- workcell clusters in accordance with various embodiments of the invention can be configured in numerous ways depending on the specific requirements of the given application.
- workcell clusters can be configured to have different workflow paths, types of workcells, and/or numbers of workcells.
- workcells can be configured to provide protection from environmental light and contaminants.
- optical filters cover the workcell in order to reduce and/or prevent unwanted light from interacting with the optical recording material, which is typically a photosensitive material.
- the deposition workcell can be lined with an appropriate optical filter that prevent light of certain wavelengths from entering the workcell and exposing the optical recording material.
- workcells can also be configured to reduce particulate contamination.
- the workcell is configured to operate in an environment with minimal air contamination. A low-particulate environment can be achieved in many different ways, including but not limited to the use of air filters.
- air filters employing laminar airflow principles are implemented.
- Contamination reduction/prevention systems such as those described above can be implemented separately or in combination.
- workcells in accordance with various embodiments of the invention can be constructed in various ways as to alter the working environment in a desired manner.
- the workcell is configured to operate in a vacuum. Specific workcells and their implementations and constructions are described in the sections below in further detail.
- Waveguide cells in accordance with various embodiments of the invention are typically composed of a layer of optical recording material sandwiched between two substrates.
- Manufacturing techniques for constructing such waveguide cells in accordance with various embodiments of the invention can include a deposition step where a layer of optical recording material is deposited onto one of the substrate.
- a preparation workcell can be implemented to perform a cleaning/preparation procedure on the substrates to prepare them for the deposition step.
- Preparing substrates such as but not limited to glass plates, can include ridding the surfaces of contaminants and increasing the surface adhesion properties for better material deposition.
- Preparation workcells can be configured to implement various cleaning and preparation protocols. Mechanical arms and/or suction apparatuses can be used to maneuver the substrates throughout the workcell.
- the preparation workcells are configured to clean glass substrates using various solvents and solutions, including but not limited to soap solutions, acid washes, acetone, and various types of alcohols.
- solvents and solutions are used in conjunction.
- methanol or isopropanol can be administered after acetone to rinse off excess acetone.
- deionized water is used to rinse off excess solvents or solutions.
- the solvents can be administered in several ways, including but not limited to the use of nozzles and baths.
- the workcell can be configured to dry the substrates using an inert gas, such as nitrogen, and/or a heating element.
- the cleaning process includes a sonication step.
- the substrate is placed in a chamber containing a solution and a transducer is used to produce ultrasonic waves.
- the ultrasonic waves can agitate the solution and remove contaminants adhered to the substrates.
- the treatment can vary in duration depending on several factors and can be performed with different types of substrates. Deionized water or cleaning solutions/solvents can be used depending on the type of contamination and the type of substrate.
- the preparation workcell is configured to implement a plasma chamber to plasma treat the surfaces of the substrates.
- the substrates are made of glass.
- Existing in the form of ions and electrons, plasma is essentially an ionized gas that has been electrified with extra electrons in both negative and positive states.
- Plasma can be used to treat the surface of the substrate to remove contaminants and/or prepare the surface for material deposition by increasing the surface energy to improve adhesion properties.
- the workcell includes a vacuum pump, which can be used to create a vacuum under which the plasma treatment can be performed.
- preparation workcells in accordance with various embodiments of the invention can be configured to perform combinations of various steps to implement a specific cleaning protocol according to the requirements of a given application.
- specific preparation workcells for preparing glass plates are discussed above, preparation workcells can be implemented to preform various preparatory steps for a variety of different substrates, including but not limited to plastics.
- Waveguide cell manufacturing systems can utilize various techniques for placing optical recording materials in between two substrates.
- Manufacturing systems in accordance with various embodiments of the invention can utilize a deposition process where a film of optical recording material is deposited onto a substrate, and the composite is laminated along with a second substrate to form a three-layer laminate.
- the manufacturing system is a workcell cluster that includes a deposition workcell for depositing a film of optical recording material onto a substrate.
- Such deposition workcells can be configured to receive substrates from preparation workcells.
- the deposition workcell includes a stage for supporting the substrate and at least one deposition mechanism for depositing material onto the substrate. Any of a variety of deposition heads can be implemented to perform as the deposition mechanism.
- spraying mechanisms such as but not limited to spraying nozzles are implemented to deposit optical recording material onto a substrate.
- the optical recording material is deposited using a printing mechanism.
- the deposition head can allow for the deposition of different materials and/or mixtures that vary in component concentrations.
- the specific deposition mechanism utilized can depend on the specific requirements of a given application.
- the components within the deposition workcell can be configured to move in various ways in order to deposit the optical recording material onto the substrate.
- the deposition head and/or the stage are configured to move across certain axes in order to deposit one or multiple layers of optical recording material.
- the deposition head is configured to move and deposit material across three dimensions, such as in a three-dimensional Euclidean space, which allows for the deposition of multiple layers onto the substrate.
- the deposition head is only configured to move in two axes to deposit a single layer.
- the stage and, consequently, the substrate are configured to move in three dimensions while the deposition head is stationary.
- deposition applications can be implemented to deposit material in various dimensions by configuring the degrees of motion freedom of the print head(s) and/or stage.
- the stage and deposition head can be configured such that their combination of degrees of motion freedom allows for depositing material in n-dimensional Euclidean space, where n is the desired dimension.
- the deposition head is configured to move back and forth to deposit material in one axis while the stage moves in a different axis, allowing for the deposition of material in a two-dimensional Euclidean plane.
- the stage is implemented using a conveyor belt.
- the system can be designed such that the conveyor belt receives the substrate from a different workcell, such as the preparation workcell. Once received, the conveyor system can move the substrate along as a deposition head deposits a layer of material onto the substrate. At the end of the conveyor path, the substrate can be delivered into another workcell.
- the deposition workcell includes an inkjet print head configured to deposit optical recording material onto the substrate.
- inkjet printing refers to a printing method that deposits a matrix of ink dots to form a desired image.
- an inkjet print head contains a large amount of small individual nozzles that can each deposit a dot of material.
- inkjet printing can be used to create complex patterns and structures with high precision due to the size and number of nozzles in a typical inkjet print head. Applying these principles to waveguide cell manufacturing applications, inkjet printing can be used to print a uniform or near-uniform, in terms of thickness and composition, layer of optical recording material.
- one or multiple layers of the optical recording material can be printed onto the substrate.
- Various optical recording materials such as those described in the sections above, can be used in conjunction with an inkjet print head.
- the printing system can be configured for use with various types of substrates.
- the choice of material to be printed and the substrates used can depend on the specific requirements of a given application. For instance, choices in material systems can be selected based on printing stability and accuracy. Other considerations can include but are not limited to viscosity, surface tension, and density, which can influence several factors such as but not limited to droplet formability and the ability to form layers of uniform thickness,
- FIG. 3A shows an isometric view of the deposition workcell 300 while FIG. 3B shows a top view of the same deposition workcell 300 .
- the deposition workcell 300 is constructed with a frame that can hold optical glass filters to prevent particulate contamination and environmental light from exposing optical recording materials within the workcell 300 .
- the workcell includes chambers 302 , 304 for receiving substrates and outputting waveguide cells.
- the stage is implemented as a conveyor belt 306 that moves received substrates along one direction.
- the deposition workcell 300 further includes an inkjet printer 308 implemented as a deposition mechanism.
- the inkjet printer 308 is configured to print across a direction different from the movement of the conveyor belt 306 , allowing for the deposition of a layer of optical recording material across the planar surface of the substrates. Additionally, the deposition workcell 300 implements a roller laminator 310 for laminating the printed layer and two substrates to construct a waveguide cell. The workcell 300 is also implemented as a glovebox with gloves 312 that allow for the manual manipulation of the devices within the workcell 300 while maintaining a clean environment.
- FIGS. 3A and 3B depict a specific deposition workcell configuration
- deposition workcells can be configured in many ways in accordance with various embodiments of the invention.
- the laminator can be implemented in a separate lamination workcell.
- automatic system configurations can be implemented.
- multiple inkjet print heads are used.
- spraying nozzles are used as the deposition mechanism.
- High luminance and excellent color fidelity are important factors in AR waveguide displays. In each case, high uniformity across the FOV can be essential.
- the fundamental optics of waveguides can lead to non-uniformities due to gaps or overlaps of beams bouncing down the waveguide. Further non-uniformities may arise from imperfections in the gratings and non-planarity of the waveguide substrates.
- SBGs there can exist a further issue of polarization rotation by birefringent gratings. The biggest challenge is the fold grating where there are millions of light paths resulting from multiple intersections of the beam with the grating fringes. Careful management of grating properties, particularly the refractive index modulation, can be utilized to overcome non-uniformity in accordance with various embodiments of the invention.
- the design can be exported to the deposition mechanism, with each target index modulation translating to a unique deposition setting for each spatial resolution cell on the substrate to be coated.
- the spatial pattern can be implemented to 30 micrometers resolution with full repeatability.
- FIGS. 4A and 4B conceptually illustrate schematically the use of reverse ray tracing to compute a compensated index modulation pattern for coating in accordance with various embodiments of the invention.
- the procedure can determine the optimum usable area of the fold grating and the refractive index modulation variation across the fold grating needed to provide uniform illumination at the eye box.
- FIG. 4A shows a mathematical model of a basic waveguide architecture that includes an input grating 402 , a fold grating that is divided up into a calculation mesh 404 , and an output grating 406 .
- the fold grating cells which contribute to the eyebox illumination for a given FOV direction can be identified.
- Reverse beam paths from the output grating are indicated by the rays 408 - 414 .
- the maximum extent of the fold grating needed to fill the eye box can be determined. This ensures that the area of HPDLC material to be deposited/printed can be kept to a minimum, thereby reducing haze in the finished waveguide part.
- the procedure can also identify which cells need to have their index modulation increased (or decreased) in order to maintain illumination uniformity across the eyebox. For example, in the embodiment of FIG.
- FIG. 4A is a plan view 450 of the final waveguide part 452 onto which is superimposed the index modulation map of the printed grating layer (corresponding to the model of FIG.
- the grating regions include the input 454 , output 456 , and fold 458 gratings.
- the fold grating contains the high index modulation regions 460 , 462 , and 464 corresponding to the cells identified in regions 416 , 420 , and 424 of FIG. 4A .
- the grating regions of FIG. 4B are surrounded by a clear polymer region 466 .
- FIGS. 4A and 4B illustrate a specific way of computing a compensated index modulation pattern, any of a variety of techniques can be utilized to compute such a pattern.
- SBG waveguides Compared with waveguides utilizing surface relief gratings (“SRGs”), SBG waveguides implementing manufacturing techniques in accordance with various embodiments of the invention can allow for the grating design parameters that impact efficiency and uniformity, such as refractive index modulation and grating thickness, to be adjusted dynamically during the deposition process. As such, there is no need for a new master for the grating recording process. With SRGs where modulation is controlled by etch depth, such schemes would not be practical as each variation of the grating would entail repeating the complex and expensive tooling process. Additionally, achieving the required etch depth precision and resist imaging complexity can be very difficult.
- FIGS. 5A and 5B conceptually illustrate the fundamental structural differences between SBGs and SRGs.
- FIG. 5A and 5B conceptually illustrate the fundamental structural differences between SBGs and SRGs.
- FIG. 5A shows a cross-sectional view 500 of a portion of an SRG.
- the grating includes a substrate 502 supporting slanted surface relief elements 504 separated by air gaps 506 .
- the surface relief elements and substrate are formed from a common material.
- the grating pitch is indicated by the symbol p and the grating depth by symbol h.
- FIG. 5B shows a cross-sectional view 550 of an SBG.
- the SBG includes alternating slanted Bragg fringes formed from low index monomer-rich fringes such as 552 and higher index LC-rich fringes such as 554 .
- the index difference is characterized by the refractive index modulation ⁇ n, which plays an equivalent role in determining grating diffraction efficiency to the grating depth in a SRG.
- the variation of index modulation is represented by the superimposed plot 556 of index modulation versus distance z along the grating.
- the index modulation has a sinusoidal profile as shown in FIG. 5B .
- the index modulation profile can include near-rectangular LC-rich and polymer-rich regions.
- Deposition processes in accordance with various embodiments of the invention can provide for the adjustment of grating design parameters by controlling the type of material that is to be deposited. Similar to multi-material additive manufacturing techniques, various embodiments of the invention can be configured to deposit different materials, or different material compositions, in different areas on the substrate. In many embodiments, a layer of optical recording material can be deposited with different materials in different areas. For example, deposition processes can be configured to deposit HPDLC material onto an area of a substrate that is meant to be a grating region and to deposit monomer onto an area of the substrate that is meant to be a nongrating region.
- the deposition process is configured to deposit a layer of optical recording material that varies spatially in component composition, allowing for the modulation of various aspects of the deposited material. Modulation schemes and deposition processes for different types of materials and mixtures are discussed below in further detail.
- the deposition head is configured to deposit a layer of optical recording material for a waveguide cell intended to be recorded with three different gratings.
- the layer can be deposited such that the materials printed in each of the areas designated for the three gratings are all different from one another.
- FIG. 6 conceptually illustrates a waveguide cell 600 with marked areas intended to be recorded with various gratings in accordance with an embodiment of the invention. As shown, areas for an input grating 602 , a fold grating 604 , and an output grating 606 are outlined. Such areas can each be composed of a different material or different mixture composition depending on the given application.
- the waveguide cell is in a curvilinear shape, which, along with the positions, sizes, and shapes of the gratings, is designed to be a waveguide for near-eye applications.
- Deposition of material with different compositions can be implemented in several different ways.
- more than one deposition head can be utilized to deposit different materials and mixtures.
- Each deposition head can be coupled to a different material/mixture reservoir.
- Such implementations can be used for a variety of applications.
- different materials can be deposited for grating and nongrating areas of a waveguide cell.
- HPDLC material is deposited onto the grating regions while only monomer is deposited onto the nongrating regions.
- the deposition mechanism can be configured to deposit mixtures with different component compositions.
- spraying nozzles can be implemented to deposit multiple types of materials onto a single substrate. In waveguide applications, the spraying nozzles can be used to deposit different materials for grating and non-grating areas of the waveguide.
- FIGS. 7A and 7B conceptually illustrate operation of a deposition mechanism utilizing a spray module in accordance with an embodiment of the invention. As shown, the apparatus 700 includes a coating module 702 that includes a first spray module 704 connected via a pipe 706 to a first reservoir 708 containing a first mixture of a first material and a second spray module 710 connected via a pipe 712 to a second reservoir 714 containing a second mixture of a second material.
- the first material includes at least a liquid crystal and a monomer while the second material includes only a monomer.
- the first material includes at least a liquid crystal and a monomer while the second material includes only a monomer.
- Such a configuration allows for the deposition of a layer of optical recording material with defined grating and non-grating areas.
- any configurations of different mixtures can be utilized as appropriate depending on the specific application.
- the first and second spray modules provide jets of liquid droplets over a controllable divergence angle as represented by 716 , 718 .
- the apparatus further includes a support for a transparent substrate 720 having predefined regions for supporting gratings as illustrated by the shaded regions 722 - 726 , regions of gratings that do not transmit light into the eyebox as indicated by 728 , 730 , and regions surrounding the gratings indicated by 732 .
- the regions 728 , 730 are identified by a reverse ray trace of the waveguide from the eyebox.
- the regions for supporting gratings providing diffracted light that enters the eye box are coated with the first mixture.
- the regions 728 , 730 are coated with the second mixture.
- the apparatus further includes a positioning apparatus 734 connected to the coating apparatus by a control link 736 for traversing the coating apparatus across the substrate.
- the apparatus further includes a switching mechanism for activating the first spray module and deactivating the second spray module when the coating apparatus is positioned over a substrate region for supporting a grating and for deactivating the first spray module and activating the second spray module when the coating apparatus is positioned over a substrate region that does not support a grating.
- FIGS. 8A and 8B Two operational states of the apparatus are conceptually illustrated in FIGS. 8A and 8B , which show a detail of the substrate.
- FIG. 8A when the coating apparatus is over a nongrating-supporting region 800 (located in the upper region of the strip bounded by the edges 802 , 804 ), the second spray module is activated, and the first spray module is deactivated so that a layer of monomer 806 is sprayed onto the substrate.
- FIG. 8A when the coating apparatus is over a nongrating-supporting region 800 (located in the upper region of the strip bounded by the edges 802 , 804 ), the second spray module is activated, and the first spray module is deactivated so that a layer of monomer 806 is sprayed onto the substrate.
- FIG. 8A when the coating apparatus is over a nongrating-supporting region 800 (located in the upper region of the strip bounded by the edges 802 , 804 ), the second spray module is activated,
- the second spray module is deactivated, and the first spray module is activated so that a layer of liquid crystal and monomer mixture 810 is sprayed onto the substrate.
- FIGS. 7A-8B illustrate specific applications and configurations of spraying mechanisms, spraying mechanisms and deposition mechanisms in general can be configured and utilized for a variety of applications.
- the spraying mechanism is configured for printing gratings in which at least one of the material composition, birefringence, and thickness can be controlled using a coating apparatus having at least two selectable spray heads.
- the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of laser banding. In several embodiments, the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of polarization non-uniformity.
- the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of polarization non-uniformity in association with an alignment control layer.
- the deposition workcell can be configured for the deposition of additional layers such as beam splitting coatings and environmental protection layers.
- FIGS. 7A-8B discuss the capabilities of spraying nozzles, these capabilities can be implemented in other deposition mechanisms.
- inkjet print heads can also be implemented to print different materials in grating and nongrating regions of the substrate.
- FIG. 9 is a flow chart conceptually illustrating a method of fabricating a holographic grating using a selective coating process in accordance with an embodiment of the invention.
- the method 900 includes providing ( 902 ) a transparent substrate for coating.
- a grating supporting and non-grating-supporting regions of the substrate can be defined ( 904 ).
- gratings of various sizes and shapes can be defined.
- a grating region supports an input, a fold, or an output grating.
- the substrate has regions defined for gratings made of a combination of the aforementioned types of gratings.
- a first mixture for coating containing a liquid crystal and monomer and a second mixture for coating containing a monomer can be provided ( 906 ).
- a first spray head can be provided ( 908 ) for coating the first mixture onto the substrate.
- a second spray head can be provided ( 910 ) for coating the second mixture.
- the first and second spray heads integrated together can be considered a coating apparatus.
- the coating apparatus can be moved ( 914 ) to the current position over the substrate.
- a decision can be made ( 916 ) on whether the current coating apparatus is positioned over a grating supporting region or a non-grating-supporting region.
- the first spray head can be activated and the second spray head can be deactivated ( 918 ). If the coating module is over a grating-supporting region, the first spray head can be deactivated and the second spray head can be activated ( 920 ). A decision can be made ( 922 ) regarding the coating status. If all specified regions have been coated, the process can be terminated ( 924 ). If the specified regions have not all been coated, the next region (increment k) to be coated can be selected ( 926 ) and the deposition steps can be repeated.
- FIG. 10 conceptually illustrates a deposition head for providing predefined grating characteristics within grating regions in accordance with an embodiment of the invention.
- the deposition head 1000 includes a first spray module 1002 fed via pipe 1004 from a reservoir 1006 containing a mixture of at least one of a liquid crystal and a monomer, which is dispersed into the spray jet 1008 by the spray module 1002 for coating a transparent substrate.
- the substrate has predefined regions for supporting gratings.
- an X-Y displacement controller 1010 for traversing the spray module across the substrate and a means for controlling the spray characteristics from the module over each grating region to deposit a film that provides a predefined grating characteristic within the grating region following holographic exposure.
- the holographic exposure may be carried out using any current holographic process, include any of the processes disclosed in the reference documents.
- the deposition head 1000 further includes a mixture controller 1012 for controlling one or more of the temperature, dilution and relative concentrations of chemical components of the mixture.
- the deposition head 1000 can also include a spray controller 1014 for controlling one or more of the spray angle relative to the substrate, the spray divergence angle, and the durations of the spray on and off states.
- the predefined grating characteristic includes one or more of refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- deposition heads can be implemented and configured in many different ways. In many embodiments, any combination and subset of the X-Y displacement controller, mixture controller, and spray controller can be utilized. In some embodiments, additional controllers are utilized to configure the spraying mechanism and the material deposited.
- FIG. 11 conceptually illustrates operation of a deposition head for depositing material having regions with predefined grating characteristics in accordance with an embodiment of the invention.
- the deposition head can be configured to deposit material having a spatial variation across the grating region of one or more of refractive index modulation, refractive index, birefringence, liquid crystal director alignment and grating layer thickness.
- the spray module 1100 follows a spraying path 1102 across the substrate 1104 .
- the spray can be dynamically controlled during transit along the path 1102 to vary the predefined grating characteristics in areas of the predefined grating regions such as 1106 , 1108 , for example.
- the deposition mechanism provides, after exposure, a grating with a spatially varying diffraction efficiency.
- a grating with a spatially varying diffraction efficiency.
- the coating areas 1106 , 1108 (after holographic exposure) exhibit diffraction efficiency (DE) versus angle (U) characteristics represented by the curves 1110 , 1112 respectively.
- FIG. 12 conceptually illustrates a deposition mechanism for depositing two grating layers in accordance with an embodiment of the invention.
- the system 1200 is similar to that of FIG. 11 but further includes a second spray module 1202 providing a jet 1204 for coating the second grating layer 1206 .
- the grating layers are coated using different mixture compositions.
- the system includes a first spray module connected to a first reservoir containing a first mixture that includes at least one of a first liquid crystal and a first monomer and a second spray module connected to a second reservoir containing a second mixture that includes at least one of a second liquid crystal and a second monomer.
- FIG. 13 conceptually illustrates a system for depositing a grating layer of material and for holographically exposing the layer using recording beams with on and off states synchronized with the coating module.
- the system 1300 includes a coating apparatus similar to that of FIG. 12 following a spraying path 1302 across the substrate 1304 providing predefined grating regions 1306 , 1308 .
- a holographic exposure apparatus 1310 which provides a recording beam 1312 , can expose coated predefined grating regions 1314 .
- the holographic exposure apparatus is based on a master grating which contact copies the required grating into the predefined grating region.
- FIG. 14 is a flow chart conceptually illustrating a method of depositing a film of material with regions having predefined grating characteristics in accordance with an embodiment of the invention.
- the method 1400 includes providing ( 1402 ) a transparent substrate for coating.
- a grating supporting and non-grating-supporting regions of the substrate can be defined ( 1404 ).
- a mixture containing a liquid crystal and monomer can be provided ( 1406 ).
- the material utilized includes one or more of a photoinitiator, nano-particles, low-functionality monomers, additives for reducing switching voltage, additives for reducing switching time, additives for increasing refractive index modulation and additives for reducing haze.
- a spray module for coating the mixture onto the substrate can be provided ( 1408 ).
- the spray module can be moved ( 1412 ) to the current position over the substrate.
- a decision can be made ( 1414 ) on whether the current coating apparatus is positioned over a grating supporting region or a non-grating-supporting region. If the coating apparatus is over a grating region, the spray module can be activated ( 1416 ) to provide a spray characteristic for achieving a predefined grating characteristic within the grating region.
- the grating region can be coated ( 1418 ).
- a decision can be made ( 1420 ) regarding the coating status. If all specified regions have been coated, the process can be terminated ( 1422 ). If all specified regions have not been coated, the next region to be coated can be selected ( 1424 ) and the deposition steps can be repeated with k incremented.
- FIGS. 10-14 illustrate specific implementations and methods of depositing material with regions having predefined grating characteristics
- any of a variety of configurations can be implemented.
- multiple spray modules or deposition heads are utilized.
- Various predefined grating characteristics can be controlled and/or modulated depending on the specific application. Modulation of material composition utilizing more than one deposition head is discussed below in further detail.
- deposition processes can be configured to deposit optical recording material that varies spatially in component composition. Modulation of material composition can be implemented in many different ways.
- an inkjet print head can be configured to modulate material composition by utilizing the various inkjet nozzles within the print head. By altering the composition on a “dot-by-dot” basis, the layer of optical recording material can be deposited such that it has a varying composition across the planar surface of the layer.
- Such a system can be implemented using a variety of apparatuses including but not limited to inkjet print heads.
- inkjet print heads in accordance with various embodiments of the invention can be configured to print optical recording materials with varying compositions using only a few reservoirs of different materials.
- Different types of inkjet print heads can have different precision levels and can print with different resolutions.
- a 300 DPI (“dots per inch”) inkjet print head is utilized.
- discretization of varying compositions of a given number of materials can be determined across a given area.
- each dot location can contain either one of the two types of materials.
- each dot location can contain either one of the two types of materials or both materials.
- more than one inkjet print head is configured to print a layer of optical recording material with a spatially varying composition.
- FIG. 15 conceptually illustrates an inkjet printing modulation scheme in accordance with an embodiment of the invention.
- eighteen discrete unit-squares are each capable of being printed with a varying ratios of two different types of materials.
- the inkjet print head is capable of printing sixty-four dots within each of the eighteen unit squares. Each dot can be printed with either one of two types of material.
- a close up 1500 of unit square 1502 shows that all sixty-four dot locations within the unit square is printed with the first material.
- a close up 1504 of unit square 1506 is printed completely with the second material.
- Unit square 1508 shows an intermediate composition where thirty out of the sixty-four dot locations are printed with the first material while the remaining dot locations are printed with the second material.
- unit square 1508 as a whole, contains an intermediate level of concentrations from both materials. Utilizing this modulation scheme, any pattern of varying material characteristics can be achieved.
- the amount of discrete levels of possible concentrations/ratios across a unit square is given by how many dot locations can be printed within the unit square.
- sixty-four discrete dots can be printed within the unit square, which thus results in each unit square having a possibility of sixty-five different concentration combinations, ranging from 100% of the first material to 100% of the second material.
- FIG. 15 discusses the areas in terms of a unit square, the concepts are applicable to real units and can be determined by the precision level of the inkjet print head.
- modulating the material composition of the printed layer can be expanded to use more than two different material reservoirs and can vary in precision levels, which largely depends on the type of print head used.
- Varying the composition of the material printed can be advantageous for several reasons. For example, in many embodiments, varying the composition of the material during deposition can allow for a waveguide with gratings that have varying diffraction efficiencies across different areas of the gratings. In embodiments utilizing HPDLC mixtures, this can be achieved by modulating the relative concentration of liquid crystals in the HPDLC mixture during the printing process, which creates compositions that can produce gratings with varying diffraction efficiencies when exposed.
- a first HPDLC mixture with a certain concentration of liquid crystals and a second HPDLC mixture that is liquid crystal-free are used as the printing palette in an inkjet print head for modulating the diffraction efficiencies of gratings that can be formed in the printed material.
- discretization can be determined based on the precision of the inkjet print head. For example, if a 150 DPI inkjet print head is utilized, each square inch can be printed with 22,501 discrete levels of liquid crystal concentration. A discrete level can be given by the concentration/ratio of the materials printed across a certain area. In this example, the discrete levels range from no liquid crystal to the maximum concentration of liquid crystals in the first PDLC mixture.
- Waveguides are typically designed such that light can be reflected many times between the two planar surfaces of a waveguide. These multiple reflections can allow for a light path to interact with a grating multiple times.
- a waveguide cell can be printed with varying compositions such that the gratings formed from the optical recording material layer have varying diffraction efficiencies to compensate for the loss of light during interactions with the gratings to allow for a uniform output intensity.
- an output grating is configured to provide exit pupil expansion in one direction while also coupling light out of the waveguide.
- the output grating can be designed such that when light within the waveguide interact with the grating, only a percentage of the light is refracted out of the waveguide. The remaining portion continues in the same light path, which remains within TIR and continues to be reflected within the waveguide. Upon a second interaction with the same output grating again, another portion of light is refracted out of the waveguide. During each refraction, the amount of light still traveling within the waveguide decreases by the amount refracted out of the waveguide. As such, the portions refracted at each interaction gradually decreases in terms of total intensity. By varying the diffraction efficiencies of the grating such that it increases with propagation distance, the decrease in output intensity along each interaction can be compensated, allowing for a uniform output intensity.
- Varying the diffraction efficiency can also be used to compensate for other attenuation of light within a waveguide. All objects have a degree of reflection and absorption. Light trapped in TIR within a waveguide are continually reflected between the two surfaces of the waveguide. Depending on the material that makes up the surfaces, portions of light can be absorbed by the material during each interaction. In many cases, this attenuation is small, but can be substantial across a large area where many reflections occur.
- a waveguide cell can be printed with varying compositions such that the gratings formed from the optical recording material layer have varying diffraction efficiencies to compensate for the absorption of light from the substrates. Depending on the substrates, certain wavelengths can be more prone to absorption by the substrates.
- each layer can be designed to couple in a certain range of wavelengths of light. Accordingly, the light coupled by these individual layers can be absorbed in different amounts by the substrates of the layers.
- the waveguide is made of a 3-layer stack to implement a color display, where each layer is designed for one of Red, Green, and Blue.
- gratings within each of the waveguide layers can be formed to have varying diffraction efficiencies to perform color balance optimization by compensating for color imbalance due to loss of transmission of certain wavelengths of light.
- another technique includes varying the thickness of the waveguide cell. This can be accomplished through the use of beads.
- beads are dispersed throughout the optical recording material for structural support during the construction of the waveguide cell.
- different sizes of beads are dispersed throughout the optical recording material.
- the beads can be dispersed in ascending order of sizes across one direction of the layer of optical recording material.
- the substrates sandwich the optical recording material and, with structural support from the varying sizes of beads, create a wedge shaped layer of optical recording material. Beads of varying sizes can be dispersed similar to the modulation process described above.
- modulating bead sizes can be combined with modulation of material compositions.
- reservoirs of HPDLC materials each suspended with beads of different sizes are used to print a layer of HPDLC material with beads of varying sizes strategically dispersed to form a wedge shaped waveguide cell.
- bead size modulation is combined with material composition modulation by providing an amount of reservoirs equal to the product of the number of different sizes of beads and the number of different materials used.
- the inkjet print head is configured to print varying concentrations of liquid crystal with two different bead sizes.
- four reservoirs can be prepared: a liquid crystal-free mixture-suspension with beads of a first size, a liquid crystal-free mixture-suspension with beads of a second size, a liquid crystal-rich mixture-suspension with beads of a first size, and a liquid crystal-rich mixture-suspension with beads of a second size.
- the workcell cluster includes a lamination workcell for laminating the waveguide cell.
- a second substrate can be placed onto the optical recording material, creating a three-layer composite.
- the second substrate will be made of the same material and in the same dimensions as the first substrate.
- the deposition workcell is configured to place the second substrate onto the optical recording material.
- the lamination workcell is configured to place the second substrate onto the optical recording material.
- the second substrate can be placed manually or through the use of mechanical arms and/or suction mechanisms. Once the second substrate is placed, the three-layer composite may be too unstable to handle manually and, thus, in many embodiments, a laminator is implemented to compact the composite.
- the three-layer composite can be laminated in various ways.
- a press is implemented to provide downward pressure onto the composite.
- the lamination workcell is configured to feed the composite through a roller laminator.
- the compacted composite and adhesion properties of the optical recording material can result in a waveguide cell with enough stability to be handled manually.
- the layer of optical recording material includes beads. Consequently, these relatively incompressible beads can define the height of the layer of optical recording material within the compacted composite. As discussed in the sections above, differently sized beads can be placed throughout the optical recording material. Upon lamination, the sizes of the beads can each determine the local thickness of the waveguide cell. By varying the sizes of the beads, a wedge shaped waveguide cell can be constructed.
- the lamination of the substrates-optical recording material layer composite can be achieved using lamination workcells that can be configured and implemented in many different ways.
- the lamination workcell is a modular workcell within the workcell cluster.
- the lamination workcell is simply a laminator implemented within the deposition workcell, such as the one shown in FIGS. 3A and 3B .
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Abstract
Systems for the manufacturing of waveguide cells in accordance with various embodiments can be configured and implemented in many different ways. In many embodiments, various deposition mechanisms are used to deposit layer(s) of optical recording material onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. Suitable optical recording material can vary widely depending on the given application. In some embodiments, the optical recording material deposited has a similar composition throughout the layer. In a number of embodiments, the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.
Description
- The current application claims the benefit of and priority under 35 U.S.C. § 119(e) to U.S. Provisional Patent Application No. 62/663,864 entitled “Method and Apparatus for Fabricating Holographic Gratings,” filed Apr. 27, 2018, U.S. Provisional Patent Application No. 62/614,813 entitled “Low Haze Liquid Crystal Materials,” filed Jan. 8, 2018, U.S. Provisional Patent Application No. 62/614,831 entitled “Liquid Crystal Materials and Formulations,” filed Jan. 8, 2018, U.S. Provisional Patent Application No. 62/614,932 entitled “Methods for Fabricating Optical Waveguides,” filed Jan. 8, 2018, U.S. Provisional Patent Application No. 62/667,891 entitled “Method and Apparatus for Copying a Diversity of Hologram Prescriptions from a Common Master,” filed May 7, 2018, and U.S. Provisional Patent Application No. 62/703,329 entitled “Systems and Methods for Fabricating a Multilayer Optical Structure,” filed Jul. 25, 2018. The disclosures of U.S. Provisional Patent Application Nos. 62/663,864, 62/614,813, 62/614,831, 62/614,932, 62/667,891, and 62/703,329 are hereby incorporated by reference in their entireties for all purposes.
- The present invention generally relates to processes and apparatuses for manufacturing waveguide cells and, more specifically, manufacturing waveguide cells utilizing deposition and printing techniques.
- Waveguides can be referred to as structures with the capability of confining and guiding waves (i.e., restricting the spatial region in which waves can propagate). One class of waveguides includes optical waveguides, which are structures that can guide electromagnetic waves, typically those in the visible spectrum. Waveguide structures can be designed to control the propagation path of waves using a number of different mechanisms. For example, planar waveguides can be designed to utilize diffraction gratings to diffract and couple incident light into the waveguide structure such that the in-coupled light can proceed to travel within the planar structure via total internal reflection (“TIR”).
- Fabrication of waveguides can include the use of material systems that allow for the recording of holographic optical elements within the waveguides. One class of such material includes polymer dispersed liquid crystal (“PDLC”) mixtures, which are mixtures containing photopolymerizable monomers and liquid crystals. A further subclass of such mixtures includes holographic polymer dispersed liquid crystal (“HPDLC”) mixtures. Holographic optical elements, such as volume phase gratings, can be recorded in such a liquid mixture by illuminating the material with two mutually coherent laser beams. During the recording process, the monomers polymerize and the mixture undergoes a photopolymerization-induced phase separation, creating regions densely populated by liquid crystal micro-droplets, interspersed with regions of clear polymer. The alternating liquid crystal-rich and liquid crystal-depleted regions form the fringe planes of the grating.
- Waveguide optics, such as those described above, can be considered for a range of display and sensor applications. In many applications, waveguides containing one or more grating layers encoding multiple optical functions can be realized using various waveguide architectures and material systems, enabling new innovations in near-eye displays for Augmented Reality (“AR”) and Virtual Reality (“VR”), compact Heads Up Displays (“HUDs”) for aviation and road transport, and sensors for biometric and laser radar (“LIDAR”) applications.
- One embodiment includes a method for manufacturing waveguide cells, the method including providing a first substrate, determining a predefined grating characteristic, and depositing a layer of optical recording material onto the first substrate using at least one deposition head, wherein the optical recording material deposited over the grating region is formulated to achieve the predefined grating characteristic.
- In another embodiment, the method further includes providing a second substrate, placing the second substrate onto the deposited layer of optical recording material, and laminating the first substrate, the layer of optical recording material, and the second substrate.
- In a further embodiment, depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, and depositing the first and second mixtures of optical recording material onto the first substrate in a predetermined pattern using the at least one deposition head.
- In still another embodiment, the first mixture of optical recording material includes a first bead and the second mixture of optical recording material includes a second bead that is a different size from the first bead.
- In a still further embodiment, the first mixture of optical recording material has a different percentage by weight of liquid crystals than the second mixture of optical recording material.
- In yet another embodiment, the method further includes defining a grating region and a nongrating region on the first substrate, wherein the first mixture of optical recording material includes a liquid crystal and a monomer, the second mixture of optical recording material includes a monomer, and depositing the first and second mixtures of optical recording material onto the first substrate in the predetermined pattern includes depositing the first mixture of optical recording material over the grating region and depositing the second mixture of optical recording material over the nongrating region.
- In a yet further embodiment, the first mixture of optical recording material is a polymer dispersed liquid crystal mixture that includes a monomer, a liquid crystal, a photoinitiator dye, and a coinitiator.
- In another additional embodiment, the polymer dispersed liquid crystal mixture includes an additive selected from the group that includes a photoinitiator, nano particles, low-functionality monomers, additives for reducing switching voltage, additives for reducing switching time, additives for increasing refractive index modulation, and additives for reducing haze.
- In a further additional embodiment, the at least one deposition head includes at least one inkjet print head.
- In another embodiment again, depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, printing a first dot of the first mixture of optical recording material using the at least one inkjet print head, and printing a second dot of the second mixture of optical recording material adjacent to the first dot using the at least one inkjet print head.
- In a further embodiment again, the at least one inkjet print head includes a first inkjet print head and a second inkjet print head and depositing the layer of optical recording material includes providing a first mixture of optical recording material, providing a second mixture of optical recording material, printing the first mixture of optical recording material onto the first substrate using the first inkjet print head, and printing the second mixture of optical recording material onto the first substrate using the second inkjet print head.
- In still yet another embodiment, the predefined grating characteristic includes a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- In a still yet further embodiment, the predefined grating characteristic includes a spatial variation of a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- In still another additional embodiment, the predefined grating characteristic results in a grating after exposure, wherein the grating has a spatially varying diffraction efficiency.
- A still further additional embodiment includes a system for fabricating a grating, the system including at least one deposition head connected to at least one reservoir containing at least one mixture of optical recording material, a first substrate having at least one predefined region for supporting gratings, a positioning element capable of positioning the at least one deposition head across the first substrate, wherein the at least one deposition head is configured to deposit the at least one mixture of optical recording material onto the first substrate using the positioning element and the deposited material provides a predefined grating characteristic within the at least one predefined grating region after holographic exposure.
- In still another embodiment again, the at least one deposition head is connected to a first reservoir containing a first mixture of optical recording material and a second reservoir containing a second mixture of optical recording material.
- In a still further embodiment again, the first mixture of optical recording material includes a liquid crystal and a monomer and the second mixture of optical recording material includes a monomer, wherein the at least one deposition head is configured to deposit the first mixture of optical recording material onto the at least one predefined grating region.
- In yet another additional embodiment, the at least one deposition head includes at least one inkjet print head.
- In a yet further additional embodiment, the predefined grating characteristic includes a characteristic selected from the group that includes refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
- In yet another embodiment again, the predefined grating characteristic results in a grating after exposure, wherein the grating has a spatially varying diffraction efficiency.
- Additional embodiments and features are set forth in part in the description that follows, and in part will become apparent to those skilled in the art upon examination of the specification or may be learned by the practice of the invention. A further understanding of the nature and advantages of the present invention may be realized by reference to the remaining portions of the specification and the drawings, which forms a part of this disclosure.
- The description will be more fully understood with reference to the following figures and data graphs, which are presented as exemplary embodiments of the invention and should not be construed as a complete recitation of the scope of the invention. It will apparent to those skilled in the art that the present invention may be practiced with some or all of the present invention as disclosed in the following description.
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FIG. 1A conceptually illustrates a profile view of a waveguide cell in accordance with an embodiment of the invention. -
FIG. 1B conceptually illustrates a waveguide cell with a wedge-shaped profile in accordance with an embodiment of the invention. -
FIG. 1C conceptually illustrates a top view of a waveguide cell in accordance with an embodiment of the invention. -
FIG. 2A conceptually illustrates a workcell cluster system in accordance with an embodiment of the invention. -
FIG. 2B conceptually illustrates a workcell cluster system with two deposition workcells in accordance with an embodiment of the invention. -
FIG. 3A conceptually illustrates an isometric view of a deposition workcell in accordance with an embodiment of the invention. -
FIG. 3B conceptually illustrates a top view of a deposition workcell in accordance with an embodiment of the invention. -
FIGS. 4A and 4B conceptually illustrate schematically the use of reverse ray tracing to compute a compensated index modulation pattern for coating in accordance with various embodiments of the invention. -
FIGS. 5A and 5B conceptually illustrate the fundamental structural differences between SBGs and SRGs. -
FIG. 6 conceptually illustrates a waveguide cell with marked areas for gratings in accordance with an embodiment of the invention. -
FIGS. 7A and 7B conceptually illustrate operation of a deposition mechanism utilizing a spray module in accordance with an embodiment of the invention. -
FIGS. 8A and 8B conceptually illustrate two operational states of a spray module in accordance with an embodiment of the invention. -
FIG. 9 is a flow chart conceptually illustrating a method of fabricating a holographic grating using a selective coating process in accordance with an embodiment of the invention. -
FIG. 10 conceptually illustrates a deposition head for providing predefined grating characteristics within grating regions in accordance with an embodiment of the invention. -
FIG. 11 conceptually illustrates operation of a deposition head for depositing material having regions with predefined grating characteristics in accordance with an embodiment of the invention. -
FIG. 12 conceptually illustrates a deposition mechanism for depositing two grating layers in accordance with an embodiment of the invention. -
FIG. 13 conceptually illustrates a system for depositing a grating layer of material and for holographically exposing the layer in accordance with an embodiment of the invention. -
FIG. 14 is a flow chart conceptually illustrating a method of depositing a film of material with regions having predefined grating characteristics in accordance with an embodiment of the invention. -
FIG. 15 conceptually illustrates an inkjet printing modulation scheme in accordance with an embodiment of the invention. - For the purposes of describing embodiments, some well-known features of optical technology known to those skilled in the art of optical design and visual displays have been omitted or simplified in order to not obscure the basic principles of the invention. Unless otherwise stated, the term “on-axis” in relation to a ray or a beam direction refers to propagation parallel to an axis normal to the surfaces of the optical components described in relation to the invention. In the following description, the terms light, ray, beam and direction may be used interchangeably and in association with each other to indicate the direction of propagation of light energy along rectilinear trajectories. Parts of the following description will be presented using terminology commonly employed by those skilled in the art of optical design. For illustrative purposes, it is to be understood that the drawings are not drawn to scale unless stated otherwise.
- Turning now to the drawings, systems and methods for manufacturing waveguide cells are illustrated. A waveguide cell can be defined as a device containing uncured and/or unexposed optical recording material in which optical elements, such as but not limited to gratings, can be recorded through exposure to certain wavelengths of electromagnetic radiation. Many techniques exist for the manufacturing and construction of waveguide cells. In many embodiments, a waveguide cell is constructed by placing a thin film of optical recording material between two transparent substrates. In further embodiments, a workcell cluster manufacturing system is implemented to construct such waveguide cells. A workcell can be defined as a set of machines assigned to a particular manufacturing task. A cluster can be defined as a group of machines that performs a similar function cooperatively. In some embodiments, the workcell cluster includes a preparation workcell for preparing substrates for deposition, a deposition workcell for depositing an optical recording material onto a substrate, and a lamination workcell for laminating various layers together to form a waveguide cell.
- Workcells and workcell clusters in accordance with various embodiments can be configured and implemented in many different ways. For instance, preparation workcells can be configured to prepare substrates for material deposition through various processes, including but not limited to cleaning procedures and protocols. In many embodiments, the preparation of substrates includes glass cleaning procedures for ridding the surfaces of the substrates of contaminants and particles. In some embodiments, procedures for increasing the surface adhesion properties of the substrates are implemented to further prepare the substrates for material deposition.
- Deposition workcells can be configured to deposit one or more layers of optical recording material onto a transparent substrate using a variety of different deposition and printing mechanisms. In many embodiments, additive manufacturing techniques, such as but not limited to inkjet printing, are used to deposit the layer(s) of optical recording material. In several embodiments, spraying techniques are utilized to deposit the layer(s) of optical recording material. Suitable optical recording material can vary widely depending on the given application. In some embodiments, the optical recording material deposited has a similar composition throughout the layer. In a number of embodiments, the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.
- Lamination workcells can be configured to laminate various layers to form a waveguide cell. In a number of embodiments, the lamination workcell is configured to laminate and form a three-layer composite of optical recording material and transparent substrates. As can readily be appreciated, the number of layers and types of materials used to construct the waveguide cells can vary and depend on the given application. For example, in some embodiments, waveguide cells can be constructed to include protective cover layers, polarization control layers, and/or alignment layers. In some embodiments, the system is configured for the production of curved waveguides and waveguide cells. Specific materials, systems, and methods for constructing waveguide cells are discussed below in further detail.
- Waveguide Cells
- Waveguide cells can be configured and constructed in many different ways in accordance with various embodiments of the invention. As discussed above, in many waveguide configurations, the waveguide cell includes a thin film of optical recording material sandwiched between two substrates. Such waveguide cells can be manufactured using various processes. In many embodiments, waveguide cells can be constructed by coating a first substrate with an optical recording material capable of acting as an optical recording medium. Various optical recording materials can be used. In some embodiments, the optical recording material is a holographic polymer dispersed liquid crystal mixture (e.g., a matrix of liquid crystal droplets). As can readily be appreciated, the choice of optical recording material and types of mixtures utilized can depend on the given application. The optical recording material can be deposited using a variety of deposition techniques. In a number of embodiments, the optical recording material can be deposited onto the first substrate through inkjetting, spin coating, and/or spraying processes. The deposition processes can be configured to deposit one or more type of optical recording material. In some embodiments, the deposition process is configured to deposit optical recording material that spatially varies in composition across a substrate. After deposition of the optical recording material, a second substrate can be placed such that the optical recording material is sandwiched between the two substrates to form a waveguide cell. In several embodiments, the second substrate can be a thin protective film coated onto the exposed layer. In such embodiments, various techniques, including but not limited to spraying processes, can be used to coat the exposed layer with the desired film of material. In a number of embodiments, the waveguide cell can include various additional layers, such as but not limited to polarization control layers and/or alignment layers. Other processes for manufacturing waveguide cells can include filling empty waveguide cells (constructed of two substrates) with an optical recording material using processes such as but not limited to gravity filling and vacuum filling methods.
- Substrates used in the construction of waveguide cells are often made of transparent materials. In some embodiments, the substrate is an optical plastic. In other embodiments, the substrate may be fabricated from glass. An exemplary glass substrate is standard Corning Willow glass substrate (index 1.51) which is available in thicknesses down to 50 micrometers. The thicknesses of the substrates can vary from application to application. In many embodiments, 1 mm thick glass slides are used as the substrates. In addition to different thicknesses, substrates of different shapes, such as but not limited to rectangular and curvilinear shapes, can also be used depending on the application. Oftentimes, the shapes of the substrates can determine the overall shape of the waveguide. In a number of embodiments, the waveguide cell contains two substrates that are of the same shape. In other embodiments, the substrates are of different shapes. As can readily be appreciated, the shapes, dimensions, and materials of the substrates can vary and depend on the specific requirements of a given application.
- In many embodiments, beads or other particles are dispersed throughout the optical recording material to help control the thickness of the layer of optical recording material and to help prevent the two substrates from collapsing onto one another. In some embodiments, the waveguide cell is constructed with an optical recording material layer sandwiched between two planar substrates. Depending on the type of optical recording material used, thickness control can be difficult to achieve due to the viscosity of some optical recording materials and the lack of a bounding edge for the optical recording material layer. In a number of embodiments, the beads are relatively incompressible solids, which can allow for the construction of waveguide cells with consistent thicknesses. The size of a bead can determine a localized minimum thickness for the area around the individual bead. As such, the dimensions of the beads can be selected to help attain the desired optical recording material layer thickness. The beads can be made of any of a variety of materials, including but not limited to glass and plastics. In several embodiments, the material of the beads is selected such that its refractive index does not substantially affect the propagation of light within the waveguide cell.
- In some embodiments, the waveguide cell is constructed such that the two substrates are parallel or substantially parallel. In such embodiments, relatively similar sized beads can be dispersed throughout the optical recording material to help attain a uniform thickness throughout the layer. In other embodiments, the waveguide cell has a tapered profile. A tapered waveguide cell can be constructed by dispersing beads of different sizes across the optical recording material. As discussed above, the size of a bead can determine the local minimum thickness of the optical recording material layer. By dispersing the beads in a pattern of increasing size across the material layer, a tapered layer of optical recording material can be formed when the material is sandwiched between two substrates.
- Once constructed, waveguide cells can be used in conjunction with a variety of processes for recording optical elements within the optical recording material. For example, the process disclosed may incorporated embodiments and teachings from the materials and processes, such as but not limited to those described in U.S. patent application Ser. No. 16/116,834 entitled “Systems and Methods for High-Throughput Recording of Holographic Gratings in Waveguide Cells,” filed Aug. 29, 2018 and U.S. patent application Ser. No. 16/007,932 entitled “Holographic Material Systems and Waveguides Incorporating Low Functionality Monomers,” filed Jun. 13, 2018 The disclosures of U.S. patent application Ser. Nos. 16/116,834 and 16/007,932 are hereby incorporated in their entireties for all purpose.
- A profile view of a
waveguide cell 100 in accordance with an embodiment of the invention is conceptually illustrated inFIG. 1A . As shown, thewaveguide cell 100 includes a layer ofoptical recording material 102 that can be used as a recording medium for optical elements, such as but not limited to gratings. Theoptical recording material 102 can be any of a variety of compounds, mixtures, or solutions, such as but not limited to the HPDLC mixtures described in the sections above. In the illustrative embodiment, theoptical recording material 102 is sandwich between twoparallel glass plates FIG. 1B conceptually illustrates a profile view of a taperedwaveguide cell 108 utilizingbeads beads optical recording material 116 sandwiched by twoglass plates FIG. 1C conceptually illustrates a top view of awaveguide cell 122 having a curvilinear shape in accordance with an embodiment of the invention. - Although
FIGS. 1A-1C illustrate specific waveguide cell constructions and arrangements, waveguide cells can be constructed in many different configurations and can use a variety of different materials depending on the specific requirements of a given application. For example, substrates can be made of transparent plastic polymers instead of glass. Additionally, the shapes and sizes of the waveguide cells can vary greatly and can be determined by various factors, such as but not limited to the application of the waveguide, ergonomic considerations, and economical factors. In many embodiments, the substrates are curved, allowing for the production of waveguides with curved cross sections. - Waveguide cells in accordance with various embodiments of the invention can incorporate a variety of light-sensitive materials. In many embodiments, the waveguide cell incorporates a holographic polymer dispersed liquid crystal mixture that functions as an optical recording medium in which optical elements can be recorded. Optical elements can include many different types of gratings capable of exhibiting different optical properties. One type of grating that can be recorded in waveguide cells is a volume Bragg grating, which can be characterized as a transparent medium with a periodic variation in its refractive index. This variation can allow for the diffraction of incident light of certain wavelengths at certain angles. Volume Bragg gratings can have high efficiency with little light being diffracted into higher orders. The relative amount of light in the diffracted and zero order can be varied by controlling the refractive index modulation of the grating.
- One class of gratings used in holographic waveguide devices is the Switchable Bragg Grating (“SBG”). An SBG is a diffractive device that can be formed by recording a volume phase grating in an HPDLC mixture (although other materials can be used). SBGs can be fabricated by first placing a thin film of a mixture of photopolymerizable monomers and liquid crystal material between glass plates or substrates, which forms a waveguide cell. One or both glass plates can support electrodes, typically transparent tin oxide films, for applying an electric field across the film. SBGs can be implemented as waveguide devices in which the HPDLC forms either the waveguide core or an evanescently coupled layer in proximity to the waveguide. The glass plates used to form the HPDLC cell can provide a total internal reflection light guiding structure. Light is coupled out of the SBG when the switchable grating diffracts the light at an angle beyond the TIR condition.
- The grating structure in an SBG can be recorded in the film of HPDLC material through photopolymerization-induced phase separation using interferential exposure with a spatially periodic intensity modulation. Factors such as but not limited to control of the irradiation intensity, component volume fractions of the HPDLC material, and exposure temperature can determine the resulting grating morphology and performance. During the recording process, the monomers polymerize and the mixture undergoes a phase separation. The LC molecules aggregate to form discrete or coalesced droplets that are periodically distributed in polymer networks on the scale of optical wavelengths. The alternating liquid crystal-rich and liquid crystal-depleted regions form the fringe planes of the grating, which can produce Bragg diffraction with a strong optical polarization resulting from the orientation ordering of the LC molecules in the droplets. The resulting volume phase grating can exhibit very high diffraction efficiency, which may be controlled by the magnitude of the electric field applied across the HPDLC layer. When an electric field is applied to the hologram via transparent electrodes, the natural orientation of the LC droplets is changed, causing the refractive index modulation of the fringes to reduce and the hologram diffraction efficiency to drop to very low levels. The diffraction efficiency of the device can be adjusted, by means of the applied voltage, over a continuous range from near 100% efficiency with no voltage applied to essentially zero efficiency with a sufficiently high voltage applied. In certain types of HPDLC devices, phase separation of the LC material from the polymer can be accomplished to such a degree that no discernible droplet structure results. An SBG can also be used as a passive grating. In this mode, its chief benefit is a uniquely high refractive index modulation. SBGs can be used to provide transmission or reflection gratings for free space applications. SBGs can be implemented as waveguide devices in which the HPDLC forms either the waveguide core or an evanescently coupled layer in proximity to the waveguide. The glass plates used to form the HPDLC cell provide a total internal reflection light guiding structure. Light can be coupled out of the SBG when the switchable grating diffracts the light at an angle beyond the TIR condition.
- In many embodiments, SBGs are recorded in a uniform modulation material, such as POLICRYPS or POLIPHEM having a matrix of solid liquid crystals dispersed in a liquid polymer. Exemplary uniform modulation liquid crystal-polymer material systems are disclosed in United State Patent Application Publication No.: US2007/0019152 by Caputo et al and PCT Application No.: PCT/EP2005/006950 by Stumpe et al. both of which are incorporated herein by reference in their entireties. Uniform modulation gratings are characterized by high refractive index modulation (and hence high diffraction efficiency) and low scatter. In some embodiments, at least one of the gratings is recorded a reverse mode HPDLC material. Reverse mode HPDLC differs from conventional HPDLC in that the grating is passive when no electric field is applied and becomes diffractive in the presence of an electric field. The reverse mode HPDLC may be based on any of the recipes and processes disclosed in PCT Application No.: PCT/GB2012/000680, entitled IMPROVEMENTS TO HOLOGRAPHIC POLYMER DISPERSED LIQUID CRYSTAL MATERIALS AND DEVICES. Optical recording material systems are discussed below in further detail.
- HPDLC mixtures in accordance with various embodiments of the invention generally include LC, monomers, photoinitiator dyes, and coinitiators. The mixture (often referred to as syrup) frequently also includes a surfactant. For the purposes of describing the invention, a surfactant is defined as any chemical agent that lowers the surface tension of the total liquid mixture. The use of surfactants in PDLC mixtures is known and dates back to the earliest investigations of PDLCs. For example, a paper by R. L Sutherland et al., SPIE Vol. 2689, 158-169, 1996, the disclosure of which is incorporated herein by reference, describes a PDLC mixture including a monomer, photoinitiator, coinitiator, chain extender, and LCs to which a surfactant can be added. Surfactants are also mentioned in a paper by Natarajan et al, Journal of Nonlinear Optical Physics and Materials, Vol. 5 No. I 89-98, 1996, the disclosure of which is incorporated herein by reference. Furthermore, U.S. Pat. No. 7,018,563 by Sutherland; et al., discusses polymer-dispersed liquid crystal material for forming a polymer-dispersed liquid crystal optical element including: at least one acrylic acid monomer; at least one type of liquid crystal material; a photoinitiator dye; a coinitiator; and a surfactant. The disclosure of U.S. Pat. No. 7,018,563 is hereby incorporated by reference in its entirety.
- The patent and scientific literature contains many examples of material systems and processes that can be used to fabricate waveguides incorporating volume gratings, including investigations into formulating such material systems for achieving high diffraction efficiency, fast response time, low drive voltage, and so forth. U.S. Pat. No. 5,942,157 by Sutherland, and U.S. Pat. No. 5,751,452 by Tanaka et al. both describe monomer and liquid crystal material combinations suitable for fabricating waveguides incorporating volume gratings. Examples of recipes can also be found in papers dating back to the early 1990s, many of which disclose the use of acrylate monomers, including:
-
- R. L. Sutherland et al., Chem. Mater. 5, 1533 (1993), the disclosure of which is incorporated herein by reference, describes the use of acrylate polymers and surfactants. Specifically, the recipe includes a crosslinking multifunctional acrylate monomer; a chain extender N-vinyl pyrrolidinone, LC E7, photo-initiator rose Bengal, and coinitiator N-phenyl glycine. Surfactant octanoic acid was added in certain variants.
- Fontecchio et al.,
SID 00 Digest 774-776, 2000, the disclosure of which is incorporated herein by reference, describes a UV curable HPDLC for reflective display applications including a multi-functional acrylate monomer, LC, a photoinitiator, a coinitiators, and a chain terminator. - Y. H. Cho, et al., Polymer International, 48, 1085-1090, 1999, the disclosure of which is incorporated herein by reference, discloses HPDLC recipes including acrylates.
- Karasawa et al., Japanese Journal of Applied Physics, Vol. 36, 6388-6392, 1997, the disclosure of which is incorporated herein by reference, describes acrylates of various functional orders.
- T. J. Bunning et al., Polymer Science: Part B: Polymer Physics, Vol. 35, 2825-2833, 1997, the disclosure of which is incorporated herein by reference, also describes multifunctional acrylate monomers.
- G. S. Iannacchione et al., Europhysics Letters Vol. 36 (6). 425-430, 1996, the disclosure of which is incorporated herein by reference, describes a PDLC mixture including a penta-acrylate monomer, LC, chain extender, coinitiators, and photoinitiator.
- Acrylates offer the benefits of fast kinetics, good mixing with other materials, and compatibility with film forming processes. Since acrylates are cross-linked, they tend to be mechanically robust and flexible. For example, urethane acrylates of functionality 2 (di) and 3 (tri) have been used extensively for HPDLC technology. Higher functionality materials such as penta and hex functional stems have also been used.
- Although HPDLC mixtures with specific components are discussed above in relation with their suitable uses as the optical recording material in a waveguide cell, specific formulations of optical recording materials can vary widely and can depend on the specific requirements of a given application. Such considerations can include diffraction efficiency (“DE”), haze, solar immunity, transparency, and switching requirements.
- The S and P polarization response of a grating containing LC can depend on the average LC director orientations relative to the grating K-vector. Typically, the directors are substantially parallel to the K-vector, giving a strong P-response and a weaker S-response. If the LC directors are not aligned, the grating can have a strong S-response. Many embodiments of the invention include reactive monomer liquid crystal mixture (“RMLCM”) material systems configured to incorporate a mixture of LCs and monomers (and other components including: photoinitiator dye, coinitiators, surfactant), which under holographic exposure undergo phase separation to provide a grating in which at least one of the LCs and at least one of the monomers form a first HPDLC morphology that provides a P polarization response and at least one of the LCs and at least one of the monomers form a second HPDLC morphology that provides a S polarization response. In various such embodiments, the material systems include an RMLCM, which includes photopolymerizable monomers composed of suitable functional groups (e.g., acrylates, mercapto-, and other esters, among others), a cross-linking agent, a photo-initiator, a surfactant and a liquid crystal.
- Turning to the components of the material formulation, any encapsulating polymer formed from any single photo-reactive monomer material or mixture of photo-reactive monomer materials having refractive indices from about 1.5 to 1.9 that crosslink and phase separate when combined can be utilized. Exemplary monomer functional groups usable in material formulations according to embodiments include, but are not limited to, acrylates, thiol-ene, thiol-ester, fluoromonomers, mercaptos, siloxane-based materials, and other esters, etc. Polymer cross-linking can be achieved through different reaction types, including but not limited to optically-induced photo-polymerization, thermally-induced polymerization, and chemically-induced polymerization.
- These photopolymerizable materials can be combined in a biphase blend with a second liquid crystal material. Any suitable liquid crystal material having ordinary and extraordinary refractive indices matched to the polymer refractive index can be used as a dopant to balance the refractive index of the final RMLCM material. The liquid crystal material can be manufactured, refined, or naturally occurring. The liquid crystal material includes all known phases of liquid crystallinity, including the nematic and smectic phases, the cholesteric phase, the lyotropic discotic phase. The liquid crystal can exhibit ferroelectric or antiferroelectric properties and/or behavior.
- Any suitable photoinitiator, co-initiator, chain extender and surfactant (such as for example octanoic acid) suitable for use with the monomer and LC materials can be used in the RMLCM material formulation. It will be understood that the photo-initiator can operate in any desired spectral band including the in the UV and/or in the visible band.
- In various embodiments, the LCs can interact to form an LC mixture in which molecules of two or more different LCs interact to form a non-axial structure which interacts with both S and P polarizations. The waveguide can also contain an LC alignment material for optimizing the LC alignment for optimum S and P performance. In many embodiments, the ratio of the diffraction efficiencies of the P- and S-polarized light in the PDLC morphology is maintained at a relative ratio of from 1.1:1 to 2:1, and in some embodiments at around 1.5:1. In other embodiments, the measured diffraction efficiency of P-polarized light is from greater than 20% to less than 60%, and the diffraction efficiency for S-polarized light is from greater than 10% to less than 50%, and in some embodiments the diffraction efficiency of the PDLC morphology for P-polarization is around 30% and the diffraction efficiency of the PDLC morphology for S-polarization is around 20%. This can be compared with conventional PDLC morphologies where the diffraction efficiency for P-polarization is around 60% and for S-polarization is around 1 (i.e., the conventional P-polarization materials have very low or negligible S-components).
- In many embodiments, the reactive monomer liquid crystal mixture can further include chemically active nanoparticles disposed within the LC domains. In some such embodiments, the nanoparticles are carbon nanotube (“CNT”) or nanoclay nanoparticle materials within the LC domains. Embodiments are also directed to methods for controlling the nanoclay particle size, shape, and uniformity. Methods for blending and dispersing the nanoclay particles can determine the resulting electrical and optical properties of the device. The use of nanoclays in HPDLC is discussed in PCT Application No.: PCT/GB2012/000680, entitled IMPROVEMENTS TO HOLOGRAPHIC POLYMER DISPERSED LIQUID CRYSTAL MATERIALS AND DEVICES.
- The nanoclay nanoparticles can be formed from any naturally occurring or manufactured composition, as long as they can be dispersed in the liquid crystal material. The specific nanoclay material to be selected depends upon the specific application of the film and/or device. The concentration and method of dispersion also depends on the specific application of the film and/or device. In many embodiments, the liquid crystal material is selected to match the liquid crystal ordinary index of refraction with the nanoclay material. The resulting composite material can have a forced alignment of the liquid crystal molecules due to the nanoclay particle dispersion, and the optical quality of the film and/or device can be unaffected. The composite mixture, which includes the liquid crystal and nanoclay particles, can be mixed to an isotropic state by ultrasonication. The mixture can then be combined with an optically crosslinkable monomer, such as acrylated or urethane resin that has been photoinitiated, and sandwiched between substrates to form a cell (or alternatively applied to a substrate using a coating process).
- In various embodiments, nanoparticles are composed of nanoclay nanoparticles, preferably spheres or platelets, with particle size on the order of 2-10 nanometers in the shortest dimension and on the order of 10 nanometers in the longest dimension. Desirably, the liquid crystal material is selected to match the liquid crystal ordinary index of refraction with the nanoclay material. Alternatively, the nanoparticles can be composed of material having ferroelectric properties, causing the particles to induce a ferroelectric alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device. In another embodiment of the invention, the nanoparticles are composed of material having ferromagnetic properties, causing the particles to induce a ferromagnetic alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device. In another embodiment of the invention, the nanoparticles have an induced electric or magnetic field, causing the particles to induce an alignment effect on the liquid crystal molecules, thereby enhancing the electro-optic switching properties of the device. Exemplary nanoparticles used in other contexts including thermoplastics, polymer binders, etc. are disclosed in U.S. Pat. Nos. 7,068,898; 7,046,439; 6,323,989; 5,847,787; and U.S. Patent Pub. Nos. 2003/0175004; 2004/0156008; 2004/0225025; 2005/0218377; and 2006/0142455, the disclosures of which are incorporated herein by reference.
- The nanoclay can be used with its naturally occurring surface properties, or the surface can be chemically treated for specific binding, electrical, magnetic, or optical properties. Preferably, the nanoclay particles will be intercalated, so that they disperse uniformly in the liquid crystalline material. The generic term “nanoclay” as used in the discussion of the present invention can refer to naturally occurring montmorillonite nanoclay, intercalated montmorillonite nanoclay, surface modified montmorillonite nanoclay, and surface treated montmorillonite nanoclay. The nanoparticles can be useable as commercially purchased, or they may need to be reduced in size or altered in morphology. The processes that can be used include chemical particle size reduction, particle growth, grinding of wet or dry particles, milling of large particles or stock, vibrational milling of large particles or stock, ball milling of particles or stock, centrifugal ball milling of particles or stock, and vibrational ball milling of particles or stock. All of these techniques can be performed either dry or with a liquid suspension. The liquid suspension can be a buffer, a solvent, an inert liquid, or a liquid crystal material. One exemplary ball milling process provided by Spex LLC (Metuchen, N.J.) is known as the Spex 8000 High Energy Ball Mill. Another exemplary process, provided by Retsch (France), uses a planetary ball mill to reduce micrometer size particles to nanoscale particles.
- The nanoparticles can be dispersed in the liquid crystal material prior to polymer dispersion. Dry or solvent suspended nanoparticles can be ultrasonically mixed with the liquid crystal material or monomers prior to polymer dispersion to achieve an isotropic dispersion. Wet particles may need to be prepared for dispersion in liquid crystal, depending on the specific materials used. If the particles are in a solvent or liquid buffer, the solution can be dried, and the dry particles dispersed in the liquid crystal as described above. Drying methods include evaporation in air, vacuum evaporation, purging with inert gas like nitrogen and heating the solution. If the particles are dispersed in a solvent or liquid buffer with a vapor pressure lower than the liquid crystal material, the solution can be mixed directly with the liquid crystal, and the solvent can be evaporated using one of the above methods leaving behind the liquid crystal/nanoparticle dispersion. In one embodiment of the invention, the optical film includes a liquid crystal material and a nanoclay nanoparticle, where a nanoparticle is a particle of material with size less than one micrometer in at least one dimension. The film can be isotropically distributed.
- Although nanoclay materials are discussed, in many embodiments CNT is used as an alternative to nanoclay as a means for reducing voltage. The properties of CNT in relation to PDLC devices are reviewed by E. H. Kim et. al. in Polym. Int. 2010; 59: 1289-1295, the disclosure of which is incorporated herein by reference in its entirety. PDLC films have been fabricated with varying amounts of multi-walled carbon nanotubes (“MWCNTs”) to optimize the electro-optical performance of the PDLC films. The MWCNTs were well dispersed in the prepolymer mixture up to 0.5 wt %, implying that polyurethane acrylate (“PUA”) oligomer chains wrap the MWCNTs along their length, resulting in high diffraction efficiency and good phase separation. The hardness and elastic modulus of the polymer matrix were enhanced with increasing amounts of MWCNTs because of the reinforcement effect of the MWCNTs with intrinsically good mechanical properties. The increased elasticity of the PUA matrix and the immiscibility between the matrix and the liquid crystals gradually increased the diffraction efficiency of the PDLC films. However, the diffraction efficiency of PDLC films with more than 0.05 wt % MWCNTs was reduced, caused by poor phase separation between the matrix and LCs because of the high viscosity of the reactive mixture. PDLC films showing a low driving voltage (75%) could be obtained with 0.05 wt % MWCNTs at 40 wt % LCs.
- In embodiments where the PDLC materials incorporate such nanoparticles, reductions of switching voltage and improvements to the electro-optic properties of a polymer dispersed liquid crystal film and/or polymer dispersed liquid crystal device can be obtained by including nanoparticles in the liquid crystal domains. The inclusion of nanoparticles serves to align the liquid crystal molecules and to alter the birefringent properties of the film through index of refraction averaging. In addition, the inclusion of the nanoparticles improves the switching response of the liquid crystal domains.
- RMLCM material systems in accordance with various embodiments can be formulated in a variety of ways. In many embodiments, the material system is an RMLCM that includes at least one LC, at least one multi-functional monomer, a photo-initiator, a dye, and at least one mono-functional monomer. Along with several factors, such as but not limited to recording beam power/wavelength, grating periodicity, and grating thickness, the specific mixture of components and their percent composition can determine the diffraction efficiency of the resulting HPDLC gratings. Inhomogeneous polymerization due to the spatially periodic irradiation intensity of the exposure can be the driving force to segregate monomers and LCs and to order the orientation of LC molecules, which can influence the diffraction efficiencies of the HPDLC gratings. Oftentimes, the diffusion coefficient of monomers depends on their molecular weight and reactivity. It has been shown that a variety of monomer molecular weights or functional numbers can yield a complex distribution of polymer and LC phases. In many cases, molecular functionality can be critical in achieving efficient phase separation and the formation of gratings with high diffraction efficiency. As such, many embodiments of the invention include material systems formulated with specific mixes of monomers that are chosen, at least in part, for their functionality so as to influence the diffraction efficiency and index modulation of the resulting grating structure. Other considerations in formulating such a mixture can include but are not limited to the properties of the recording beam and the thickness of the gratings. For the purposes of describing this invention, the functionality of a monomer refers to the number of reactive sites on each monomer unit.
- The effects of varying monomer functionality in HPDLC material systems have been studied to some degree in the scientific literature. Such studies have generally examined the effects of the effective, or average, functionality of a mixture with regards to grating formation and performance. For example, in a paper by Pogue et al., Polymer 41 (2000) 733-741, the disclosure of which is incorporated herein by reference, investigations were conducted in floodlit PDLCs and holographic PDLC gratings to show that a decrease in effective monomer functionality general leads to decreased LC phase separation.
- Many embodiments in accordance with the invention include investigations into mixtures with specific blends of monomers of low functionality that can result in the formation of gratings having high diffraction efficiency and efficient phase separation. While the scientific literature typically emphasizes the use of high functionality monomers, various embodiments in accordance with the invention are focused on the use of monomers of low functionality in certain applications. In some embodiments, the monomers within the mixture are either mono-functional monomers or bi-functional monomers. In a number of embodiments, tri-functional monomers are also included. In such mixtures, the tri-functional monomers are typically included at a low concentration, such as lower than 5 wt %.
- Mixtures including low functional monomers can behave differently depending on a variety of factors, such as but not limited to the wavelength sensitivity of the material system, thickness of the HPDLC to be formed, and exposure temperature. In the scientific literature, investigations into PDLC material systems typically include UV sensitive material systems since material reaction efficiency in general is typically poor with visible light systems. However, formulations in accordance with various embodiments of the invention have been able to reach high diffraction efficiency (>80%) with low haze using low functionality monomers that are sensitive (polymerizes) to visible light. In further embodiments, the material systems include monomers that are sensitive to green light, such as light with wavelengths ranging from 495-570 nm. In addition to different light systems, performance of the HPDLC mixtures can depend on the thickness of the waveguide cell in which gratings are formed. For example, for a given material system, different thicknesses of deposited films can form waveguides with different amounts of haze. Although grating thicknesses have been explored in the patent and scientific literature, such investigations are focused on relatively thick gratings. In a number of embodiments, the material system is formulated for use in waveguides with thin form factors. In further embodiments, the material system is formulated for use in manufacturing waveguides having HPDLC layers with thicknesses of less than 10 μm. and gratings with more than 80% diffraction efficiency. In further embodiments, the material system is formulated for use in a waveguide having a 2-3 μm thick HPDLC layer and gratings with 80-90% diffraction efficiency. The material system can also be formulated for manufacturing such waveguides with low haze. In several embodiments, the material system can form HPDLC layers having less than 1% haze. Waveguide haze is the integrated effect of light interacting with material and surface inhomogeneities over many beam bounces. The impact on the ANSI contrast, the ratio of averaged white to black measurements taken from a checkerboard pattern, can be dramatic owing to the scatter contribution to the black level. Haze is mostly due to wide-angle scatter by LC droplets and other small particles or scattering centers resulting from incomplete phase separation of the LC/monomer mixture during grating recording. Haze can also arise, at least partly, from narrow angle scatter generated by large-scale nonuniformities, leading to a loss of see-through quality and reduced image sharpness. Some waveguide applications such as aircraft HUDs, which use 1-D beam expansion in thick waveguides, produce as few as 7 bounces, allowing up to 80:1 contrast. However, in thin waveguides of the type use in near eye displays the number of bounces may increase by a factor of 10 making the need for haze control more acute.
- RMLCM recipes can be optimized for specific thicknesses of HPDLC layers. In many embodiments, the RMLCM recipe is optimized for a ˜3 μm thick uniform modulation gratings designed to have a refractive index modulation of ˜0.16. As can readily be appreciated, the specific thickness of the waveguide parts to be fabricated can vary and can depend on the specific requirements of a given application. In a number of embodiments, the waveguide parts can be fabricated with 90% transmission and 0.3% haze. In other embodiments, the waveguide parts can be fabricated with ˜0.1% haze (with ˜0.01% haze recorded in unexposed samples of the same material). In some embodiments, the RMLCM can be formulated for fabricating waveguide parts containing haze of less than 0.05%.
- Transmission haze can be defined as the percentage of light that deviates from desired beam direction by more the 2.5 degrees on average (according to the ASTM D1003 standard). The clarity of a waveguide can be characterized by the amount of narrow angle scattered light (at an angle less than 2.5° from the normal to the waveguide surface). Transmission can be defined as the amount of light transmitted through the waveguide without being scattered. To assess general material haze, the scatter can be measured around a vector normal to a waveguide TIR surface. To assess holographic haze, the scatter can be measured around principal diffraction directions (passing through the center of the eye box). The procedures for measurement of haze, clarity and transmission are defined in the ASTM D1003 International test standards, in which “Procedure A” uses a haze meter and “Procedure B” uses a spectrophotometer. An exemplary instrument for measuring haze is the BYK-Gardner HAZE Guard II equipment.
- In many embodiments, the RMLCM mixture includes a liquid crystal mixture, a complex mixture of acrylates and acrylate esters, Dynasylan® MEMO, and photoinitiators. In further embodiments, the RMLCM includes EHA and DFHA. Depending on the specific mix of components and their percent composition, the resulting grating can have vastly different characteristics. In some embodiments, the proportion of LC by weight is greater than 30%. In further embodiments, the proportion of LC is greater than 35 wt %. In some embodiments, the mixture includes liquid crystal with high birefringence. In further embodiments, the high birefringence liquid crystal accounts for more than 20 wt % of the mixture. In a number of embodiments, dye and photo-initiators account for less than 5 wt % of the mixture.
- Nematic LC materials can provide a range of birefringence (which can translate to refractive index modulation). Low to medium birefringence typically covers the range of 0.09-0.12. However, gratings can be designed using much lower birefringence values, including gratings in which the birefringence varies along the grating. Such gratings can be used to extract light from waveguides with low efficiency at one end of the grating and high efficiency at the other end of the grating to provide spatially uniform output illumination. High birefringence (nematic LC) is typically the range of 0.2-0.5. Even higher values are possible. Nematic liquid crystals, compounds, and mixtures with positive dielectric anisotropies (i.e., LCs for which the dielectric constant is greater in the long molecular axis than that in the other directions) are review in a paper by R. Dabrowski et al., “High Birefringence Liquid Crystals”; Crystals; 2013; 3; 443-482, the disclosure of which is incorporated herein by reference.
- The functionality of the monomers in the mixtures can greatly influence the diffraction efficiency of the resulting grating. In many embodiments, the mixture includes at least one mono-functional monomer and at least one multifunctional monomer in varying concentrations. In several embodiments, the concentration of mono-functional monomer within the mixture ranges from 1-50 wt %. The monofunctional monomer can include aliphatic/aromatic groups and an adhesion promoter. In some embodiments, the proportion of multi-functional monomers present in the mixture is in the range of 2-30 wt %. Multi-functional monomers in accordance with various embodiments of the invention typically include monomers of low functionality. In a number of embodiments, the mixture includes a bi-functional monomer at a low concentration. In further embodiments, the mixture includes bi-functional monomers at less than 15 wt %. Depending on the type and concentration of bi-functional monomer in the mixture, adequate phase separation and grating formation can occur. In the illustrative embodiment, the mono-functional monomer, bi-functional monomer and LC have relative weight ratios of 30%, 14%, and 40%, which resulted in a formulation that allowed for the recording of gratings with a diffraction efficiency higher than 90% and an index modulation of around 0.12.
- As can readily be appreciated, percent composition of each component within an RMLCM can vary widely. Formulations of such material systems can be designed to achieve certain characteristics in the resulting gratings. In many cases, the RMLCM is formulated to have as high a diffraction efficiency as possible.
- Waveguide cell manufacturing systems in accordance with various embodiments of the invention can be implemented as workcell clusters. By compartmentalizing different manufacturing steps into workcells, modular systems can be implemented. In many embodiments, a workcell cluster includes a preparation workcell for preparing substrates for material deposition, a deposition workcell for depositing an optical recording material onto a substrate, and a lamination workcell for laminating various layers together to construct a waveguide cell. Workcells can be configured in various ways to implement different manufacturing processes for waveguide cells. In some embodiments, the workcells are linked and configured such that the output of one workcell is transferred to another workcell, forming a manufacturing assembly line. The transferring mechanism can be implemented in a variety of ways, such as but not limited to the use of mechanical arms, suction, and/or a conveyor system. In several embodiments, the products are manually transferred.
FIG. 2A conceptually illustrates aworkcell cluster system 200 in accordance with an embodiment of the invention. In the illustrative embodiment, thesystem 200 includes apreparation workcell 202, adeposition workcell 204, and alamination workcell 206. As shown,arrows 208 indicate a sequential workflow relationship among the workcells. - One advantage in a modular system is the ability to vary the number of workcells dedicated to a particular task to improve throughput by optimizing workcell use and reducing workcell downtime. For example, a waveguide cell manufactured with different optical recording materials may result in different deposition times. In such embodiments, the number of deposition workcells can vary accordingly to balance out the task completion time of each workcell such as to minimize the overall downtime of the workcells.
FIG. 2B conceptually illustrates aworkcell cluster system 210 with twodeposition workcells system 210 includes apreparation workcell 216, twodeposition workcells lamination workcell 218. Dottedarrows 220 indicate that output from thepreparation workcell 216 can be received by eitherdeposition workcell - Although
FIGS. 2A and 2B conceptually illustrate specific workcell cluster system configurations, workcell clusters in accordance with various embodiments of the invention can be configured in numerous ways depending on the specific requirements of the given application. For example, workcell clusters can be configured to have different workflow paths, types of workcells, and/or numbers of workcells. - Due to the sensitive nature of some materials and processes associated with waveguide cell fabrication, workcells can be configured to provide protection from environmental light and contaminants. In many embodiments, optical filters cover the workcell in order to reduce and/or prevent unwanted light from interacting with the optical recording material, which is typically a photosensitive material. Depending on the specific type of optical recording material, the deposition workcell can be lined with an appropriate optical filter that prevent light of certain wavelengths from entering the workcell and exposing the optical recording material. In addition to the reduction/prevention of light contamination, workcells can also be configured to reduce particulate contamination. In several embodiments, the workcell is configured to operate in an environment with minimal air contamination. A low-particulate environment can be achieved in many different ways, including but not limited to the use of air filters. In a number of embodiments, air filters employing laminar airflow principles are implemented. Contamination reduction/prevention systems such as those described above can be implemented separately or in combination. Although specific systems are described, workcells in accordance with various embodiments of the invention can be constructed in various ways as to alter the working environment in a desired manner. For example, in several embodiments, the workcell is configured to operate in a vacuum. Specific workcells and their implementations and constructions are described in the sections below in further detail.
- Waveguide cells in accordance with various embodiments of the invention are typically composed of a layer of optical recording material sandwiched between two substrates. Manufacturing techniques for constructing such waveguide cells in accordance with various embodiments of the invention can include a deposition step where a layer of optical recording material is deposited onto one of the substrate. In many embodiments, a preparation workcell can be implemented to perform a cleaning/preparation procedure on the substrates to prepare them for the deposition step. Preparing substrates, such as but not limited to glass plates, can include ridding the surfaces of contaminants and increasing the surface adhesion properties for better material deposition.
- Preparation workcells can be configured to implement various cleaning and preparation protocols. Mechanical arms and/or suction apparatuses can be used to maneuver the substrates throughout the workcell. In many embodiments, the preparation workcells are configured to clean glass substrates using various solvents and solutions, including but not limited to soap solutions, acid washes, acetone, and various types of alcohols. In some embodiments, several types of solvents and/or solutions are used in conjunction. For example, in several embodiments, methanol or isopropanol can be administered after acetone to rinse off excess acetone. In a number of embodiments, deionized water is used to rinse off excess solvents or solutions. The solvents can be administered in several ways, including but not limited to the use of nozzles and baths. After cleaning, the workcell can be configured to dry the substrates using an inert gas, such as nitrogen, and/or a heating element.
- In many embodiments, the cleaning process includes a sonication step. In several embodiments, the substrate is placed in a chamber containing a solution and a transducer is used to produce ultrasonic waves. The ultrasonic waves can agitate the solution and remove contaminants adhered to the substrates. The treatment can vary in duration depending on several factors and can be performed with different types of substrates. Deionized water or cleaning solutions/solvents can be used depending on the type of contamination and the type of substrate.
- In many embodiments, the preparation workcell is configured to implement a plasma chamber to plasma treat the surfaces of the substrates. In some embodiments, the substrates are made of glass. Existing in the form of ions and electrons, plasma is essentially an ionized gas that has been electrified with extra electrons in both negative and positive states. Plasma can be used to treat the surface of the substrate to remove contaminants and/or prepare the surface for material deposition by increasing the surface energy to improve adhesion properties. In a number of embodiments, the workcell includes a vacuum pump, which can be used to create a vacuum under which the plasma treatment can be performed.
- As can readily be appreciated, preparation workcells in accordance with various embodiments of the invention can be configured to perform combinations of various steps to implement a specific cleaning protocol according to the requirements of a given application. Although specific preparation workcells for preparing glass plates are discussed above, preparation workcells can be implemented to preform various preparatory steps for a variety of different substrates, including but not limited to plastics.
- Waveguide cell manufacturing systems can utilize various techniques for placing optical recording materials in between two substrates. Manufacturing systems in accordance with various embodiments of the invention can utilize a deposition process where a film of optical recording material is deposited onto a substrate, and the composite is laminated along with a second substrate to form a three-layer laminate. In many embodiments, the manufacturing system is a workcell cluster that includes a deposition workcell for depositing a film of optical recording material onto a substrate. Such deposition workcells can be configured to receive substrates from preparation workcells. In some embodiments, the deposition workcell includes a stage for supporting the substrate and at least one deposition mechanism for depositing material onto the substrate. Any of a variety of deposition heads can be implemented to perform as the deposition mechanism. In several embodiments, spraying mechanisms such as but not limited to spraying nozzles are implemented to deposit optical recording material onto a substrate. In some embodiments, the optical recording material is deposited using a printing mechanism. Depending on the type of deposition mechanism/head implemented, several different deposition capabilities can be achieved. In a number of embodiments, the deposition head can allow for the deposition of different materials and/or mixtures that vary in component concentrations. As can readily be appreciated, the specific deposition mechanism utilized can depend on the specific requirements of a given application.
- The components within the deposition workcell can be configured to move in various ways in order to deposit the optical recording material onto the substrate. In many embodiments, the deposition head and/or the stage are configured to move across certain axes in order to deposit one or multiple layers of optical recording material. In some embodiments, the deposition head is configured to move and deposit material across three dimensions, such as in a three-dimensional Euclidean space, which allows for the deposition of multiple layers onto the substrate. In a number of embodiments, the deposition head is only configured to move in two axes to deposit a single layer. In other embodiments, the stage and, consequently, the substrate are configured to move in three dimensions while the deposition head is stationary. As can readily be appreciated, deposition applications can be implemented to deposit material in various dimensions by configuring the degrees of motion freedom of the print head(s) and/or stage. The stage and deposition head can be configured such that their combination of degrees of motion freedom allows for depositing material in n-dimensional Euclidean space, where n is the desired dimension. For example, in several embodiments, the deposition head is configured to move back and forth to deposit material in one axis while the stage moves in a different axis, allowing for the deposition of material in a two-dimensional Euclidean plane. In a number of embodiments, the stage is implemented using a conveyor belt. The system can be designed such that the conveyor belt receives the substrate from a different workcell, such as the preparation workcell. Once received, the conveyor system can move the substrate along as a deposition head deposits a layer of material onto the substrate. At the end of the conveyor path, the substrate can be delivered into another workcell.
- In a number of embodiments, the deposition workcell includes an inkjet print head configured to deposit optical recording material onto the substrate. Conventionally, inkjet printing refers to a printing method that deposits a matrix of ink dots to form a desired image. In typical operation, an inkjet print head contains a large amount of small individual nozzles that can each deposit a dot of material. In additive manufacturing applications, inkjet printing can be used to create complex patterns and structures with high precision due to the size and number of nozzles in a typical inkjet print head. Applying these principles to waveguide cell manufacturing applications, inkjet printing can be used to print a uniform or near-uniform, in terms of thickness and composition, layer of optical recording material. Depending on the application and inkjet print head, one or multiple layers of the optical recording material can be printed onto the substrate. Various optical recording materials, such as those described in the sections above, can be used in conjunction with an inkjet print head. In addition to the capability of printing in different materials, the printing system can be configured for use with various types of substrates. As can readily be appreciated, the choice of material to be printed and the substrates used can depend on the specific requirements of a given application. For instance, choices in material systems can be selected based on printing stability and accuracy. Other considerations can include but are not limited to viscosity, surface tension, and density, which can influence several factors such as but not limited to droplet formability and the ability to form layers of uniform thickness,
- A
deposition workcell 300 in accordance with an embodiment of the invention is conceptually illustrate inFIGS. 3A and 3B .FIG. 3A shows an isometric view of thedeposition workcell 300 whileFIG. 3B shows a top view of thesame deposition workcell 300. As shown, thedeposition workcell 300 is constructed with a frame that can hold optical glass filters to prevent particulate contamination and environmental light from exposing optical recording materials within theworkcell 300. The workcell includeschambers conveyor belt 306 that moves received substrates along one direction. The deposition workcell 300 further includes aninkjet printer 308 implemented as a deposition mechanism. Theinkjet printer 308 is configured to print across a direction different from the movement of theconveyor belt 306, allowing for the deposition of a layer of optical recording material across the planar surface of the substrates. Additionally, the deposition workcell 300 implements aroller laminator 310 for laminating the printed layer and two substrates to construct a waveguide cell. Theworkcell 300 is also implemented as a glovebox withgloves 312 that allow for the manual manipulation of the devices within theworkcell 300 while maintaining a clean environment. - Although
FIGS. 3A and 3B depict a specific deposition workcell configuration, deposition workcells can be configured in many ways in accordance with various embodiments of the invention. For example, the laminator can be implemented in a separate lamination workcell. In several embodiments, automatic system configurations can be implemented. In many embodiments, multiple inkjet print heads are used. In other embodiments, spraying nozzles are used as the deposition mechanism. - High luminance and excellent color fidelity are important factors in AR waveguide displays. In each case, high uniformity across the FOV can be essential. However, the fundamental optics of waveguides can lead to non-uniformities due to gaps or overlaps of beams bouncing down the waveguide. Further non-uniformities may arise from imperfections in the gratings and non-planarity of the waveguide substrates. In SBGs, there can exist a further issue of polarization rotation by birefringent gratings. The biggest challenge is the fold grating where there are millions of light paths resulting from multiple intersections of the beam with the grating fringes. Careful management of grating properties, particularly the refractive index modulation, can be utilized to overcome non-uniformity in accordance with various embodiments of the invention.
- Out of the multitude of possible beam interactions (diffraction or zero order transmission), only a subset contributes to the signal presented at the eye box. By reverse tracing from the eyebox, fold regions contributing to a given field point can be pinpointed. The precise correction to the modulation that is needed to send more into the dark regions of the output illumination can then be calculated. Having brought the output illumination uniformity for one color back on target, the procedure can be repeated for other colors. Once the index modulation pattern has been established, the design can be exported to the deposition mechanism, with each target index modulation translating to a unique deposition setting for each spatial resolution cell on the substrate to be coated. In many embodiments, the spatial pattern can be implemented to 30 micrometers resolution with full repeatability.
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FIGS. 4A and 4B conceptually illustrate schematically the use of reverse ray tracing to compute a compensated index modulation pattern for coating in accordance with various embodiments of the invention. The procedure can determine the optimum usable area of the fold grating and the refractive index modulation variation across the fold grating needed to provide uniform illumination at the eye box.FIG. 4A shows a mathematical model of a basic waveguide architecture that includes an input grating 402, a fold grating that is divided up into acalculation mesh 404, and anoutput grating 406. By tracing rays from points across the eye box through the output grating and through the fold grating, the fold grating cells which contribute to the eyebox illumination for a given FOV direction can be identified. Reverse beam paths from the output grating are indicated by the rays 408-414. By repeating the ray trace for different FOV angles the maximum extent of the fold grating needed to fill the eye box can be determined. This ensures that the area of HPDLC material to be deposited/printed can be kept to a minimum, thereby reducing haze in the finished waveguide part. The procedure can also identify which cells need to have their index modulation increased (or decreased) in order to maintain illumination uniformity across the eyebox. For example, in the embodiment ofFIG. 4A , most of the fold grating region has a refractive index modulation of 0.03. However, certain calculation cells encircled by 416 (such ascell 418, for example) and encircled by 420 (such ascell 422, for example) should have index modulations of 0.07, while the calculation cells lying within therectangular zone 424 should have index modulation 0.05. Typically, the map of index modulation values is exported as an AutoCAD DXF (Drawing Interchange Format) file into the processor controlling the deposition mechanism.FIG. 4B is aplan view 450 of thefinal waveguide part 452 onto which is superimposed the index modulation map of the printed grating layer (corresponding to the model ofFIG. 4A ) as would be revealed by examining the printed grating under cross polarizers. The grating regions include theinput 454,output 456, and fold 458 gratings. In the illustrative embodiment, the fold grating contains the highindex modulation regions regions FIG. 4A . The grating regions ofFIG. 4B are surrounded by aclear polymer region 466. AlthoughFIGS. 4A and 4B illustrate a specific way of computing a compensated index modulation pattern, any of a variety of techniques can be utilized to compute such a pattern. - Compared with waveguides utilizing surface relief gratings (“SRGs”), SBG waveguides implementing manufacturing techniques in accordance with various embodiments of the invention can allow for the grating design parameters that impact efficiency and uniformity, such as refractive index modulation and grating thickness, to be adjusted dynamically during the deposition process. As such, there is no need for a new master for the grating recording process. With SRGs where modulation is controlled by etch depth, such schemes would not be practical as each variation of the grating would entail repeating the complex and expensive tooling process. Additionally, achieving the required etch depth precision and resist imaging complexity can be very difficult.
FIGS. 5A and 5B conceptually illustrate the fundamental structural differences between SBGs and SRGs.FIG. 5A shows across-sectional view 500 of a portion of an SRG. In the illustrative embodiment, the grating includes asubstrate 502 supporting slantedsurface relief elements 504 separated byair gaps 506. Typically, the surface relief elements and substrate are formed from a common material. The grating pitch is indicated by the symbol p and the grating depth by symbol h.FIG. 5B shows across-sectional view 550 of an SBG. In contrast to an SRG, the SBG includes alternating slanted Bragg fringes formed from low index monomer-rich fringes such as 552 and higher index LC-rich fringes such as 554. The index difference is characterized by the refractive index modulation δn, which plays an equivalent role in determining grating diffraction efficiency to the grating depth in a SRG. The variation of index modulation is represented by the superimposedplot 556 of index modulation versus distance z along the grating. In some embodiments, the index modulation has a sinusoidal profile as shown inFIG. 5B . In embodiments in which the SBG is formed in a uniform modulation HPLDC, the index modulation profile can include near-rectangular LC-rich and polymer-rich regions. - Deposition processes in accordance with various embodiments of the invention can provide for the adjustment of grating design parameters by controlling the type of material that is to be deposited. Similar to multi-material additive manufacturing techniques, various embodiments of the invention can be configured to deposit different materials, or different material compositions, in different areas on the substrate. In many embodiments, a layer of optical recording material can be deposited with different materials in different areas. For example, deposition processes can be configured to deposit HPDLC material onto an area of a substrate that is meant to be a grating region and to deposit monomer onto an area of the substrate that is meant to be a nongrating region. In several embodiments, the deposition process is configured to deposit a layer of optical recording material that varies spatially in component composition, allowing for the modulation of various aspects of the deposited material. Modulation schemes and deposition processes for different types of materials and mixtures are discussed below in further detail.
- The choice in material printed in a specific area can depend on the optical element that will later be recorded in that area. For example, in some embodiments, the deposition head is configured to deposit a layer of optical recording material for a waveguide cell intended to be recorded with three different gratings. The layer can be deposited such that the materials printed in each of the areas designated for the three gratings are all different from one another.
FIG. 6 conceptually illustrates awaveguide cell 600 with marked areas intended to be recorded with various gratings in accordance with an embodiment of the invention. As shown, areas for an input grating 602, a fold grating 604, and anoutput grating 606 are outlined. Such areas can each be composed of a different material or different mixture composition depending on the given application. In a number of embodiments, different materials can be deposited to produce different diffraction efficiencies among the recorded gratings. In the illustrative embodiment, the waveguide cell is in a curvilinear shape, which, along with the positions, sizes, and shapes of the gratings, is designed to be a waveguide for near-eye applications. - Deposition of material with different compositions can be implemented in several different ways. In many embodiments, more than one deposition head can be utilized to deposit different materials and mixtures. Each deposition head can be coupled to a different material/mixture reservoir. Such implementations can be used for a variety of applications. For example, different materials can be deposited for grating and nongrating areas of a waveguide cell. In some embodiments, HPDLC material is deposited onto the grating regions while only monomer is deposited onto the nongrating regions. In several embodiments, the deposition mechanism can be configured to deposit mixtures with different component compositions.
- In some embodiments, spraying nozzles can be implemented to deposit multiple types of materials onto a single substrate. In waveguide applications, the spraying nozzles can be used to deposit different materials for grating and non-grating areas of the waveguide.
FIGS. 7A and 7B conceptually illustrate operation of a deposition mechanism utilizing a spray module in accordance with an embodiment of the invention. As shown, theapparatus 700 includes acoating module 702 that includes afirst spray module 704 connected via apipe 706 to afirst reservoir 708 containing a first mixture of a first material and asecond spray module 710 connected via apipe 712 to asecond reservoir 714 containing a second mixture of a second material. In the illustrative embodiment, the first material includes at least a liquid crystal and a monomer while the second material includes only a monomer. Such a configuration allows for the deposition of a layer of optical recording material with defined grating and non-grating areas. As can readily be appreciated, any configurations of different mixtures can be utilized as appropriate depending on the specific application. - In
FIGS. 7A and 7B , the first and second spray modules provide jets of liquid droplets over a controllable divergence angle as represented by 716, 718. The apparatus further includes a support for atransparent substrate 720 having predefined regions for supporting gratings as illustrated by the shaded regions 722-726, regions of gratings that do not transmit light into the eyebox as indicated by 728, 730, and regions surrounding the gratings indicated by 732. In some embodiments, theregions regions positioning apparatus 734 connected to the coating apparatus by acontrol link 736 for traversing the coating apparatus across the substrate. The apparatus further includes a switching mechanism for activating the first spray module and deactivating the second spray module when the coating apparatus is positioned over a substrate region for supporting a grating and for deactivating the first spray module and activating the second spray module when the coating apparatus is positioned over a substrate region that does not support a grating. - Two operational states of the apparatus are conceptually illustrated in
FIGS. 8A and 8B , which show a detail of the substrate. As shown inFIG. 8A , when the coating apparatus is over a nongrating-supporting region 800 (located in the upper region of the strip bounded by theedges 802, 804), the second spray module is activated, and the first spray module is deactivated so that a layer ofmonomer 806 is sprayed onto the substrate. As shown inFIG. 8B , when the coating apparatus is over a substantially grating-supporting region 808 (located in the lower region of the strip bounded by theedges 802, 804), the second spray module is deactivated, and the first spray module is activated so that a layer of liquid crystal andmonomer mixture 810 is sprayed onto the substrate. - Although
FIGS. 7A-8B illustrate specific applications and configurations of spraying mechanisms, spraying mechanisms and deposition mechanisms in general can be configured and utilized for a variety of applications. In many embodiments, the spraying mechanism is configured for printing gratings in which at least one of the material composition, birefringence, and thickness can be controlled using a coating apparatus having at least two selectable spray heads. In some embodiments, the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of laser banding. In several embodiments, the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of polarization non-uniformity. In some embodiments, the deposition workcell provides an apparatus for depositing grating recording material optimized for the control of polarization non-uniformity in association with an alignment control layer. In a number of embodiments, the deposition workcell can be configured for the deposition of additional layers such as beam splitting coatings and environmental protection layers. Additionally, althoughFIGS. 7A-8B discuss the capabilities of spraying nozzles, these capabilities can be implemented in other deposition mechanisms. For example, inkjet print heads can also be implemented to print different materials in grating and nongrating regions of the substrate. -
FIG. 9 is a flow chart conceptually illustrating a method of fabricating a holographic grating using a selective coating process in accordance with an embodiment of the invention. Referring toFIG. 9 , themethod 900 includes providing (902) a transparent substrate for coating. A grating supporting and non-grating-supporting regions of the substrate can be defined (904). Depending on the specific application, gratings of various sizes and shapes can be defined. In some embodiments, a grating region supports an input, a fold, or an output grating. In many embodiments, the substrate has regions defined for gratings made of a combination of the aforementioned types of gratings. A first mixture for coating containing a liquid crystal and monomer and a second mixture for coating containing a monomer can be provided (906). A first spray head can be provided (908) for coating the first mixture onto the substrate. A second spray head can be provided (910) for coating the second mixture. The first and second spray heads integrated together can be considered a coating apparatus. The coating apparatus can be set (912) to its starting position (k=1). The coating apparatus can be moved (914) to the current position over the substrate. A decision can be made (916) on whether the current coating apparatus is positioned over a grating supporting region or a non-grating-supporting region. If the coating apparatus is over a grating region, the first spray head can be activated and the second spray head can be deactivated (918). If the coating module is over a grating-supporting region, the first spray head can be deactivated and the second spray head can be activated (920). A decision can be made (922) regarding the coating status. If all specified regions have been coated, the process can be terminated (924). If the specified regions have not all been coated, the next region (increment k) to be coated can be selected (926) and the deposition steps can be repeated. - Although
FIG. 9 illustrates a specific method for depositing different materials over a substrate, the deposition mechanism can be configured to produce a film of material having characteristics that can vary spatially and across regions.FIG. 10 conceptually illustrates a deposition head for providing predefined grating characteristics within grating regions in accordance with an embodiment of the invention. Referring toFIG. 10 , thedeposition head 1000 includes afirst spray module 1002 fed viapipe 1004 from areservoir 1006 containing a mixture of at least one of a liquid crystal and a monomer, which is dispersed into thespray jet 1008 by thespray module 1002 for coating a transparent substrate. The substrate has predefined regions for supporting gratings. There is also provided anX-Y displacement controller 1010 for traversing the spray module across the substrate and a means for controlling the spray characteristics from the module over each grating region to deposit a film that provides a predefined grating characteristic within the grating region following holographic exposure. The holographic exposure may be carried out using any current holographic process, include any of the processes disclosed in the reference documents. In the illustrative embodiment, thedeposition head 1000 further includes amixture controller 1012 for controlling one or more of the temperature, dilution and relative concentrations of chemical components of the mixture. Thedeposition head 1000 can also include aspray controller 1014 for controlling one or more of the spray angle relative to the substrate, the spray divergence angle, and the durations of the spray on and off states. In several embodiments, the predefined grating characteristic includes one or more of refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness. As can readily be appreciated, deposition heads can be implemented and configured in many different ways. In many embodiments, any combination and subset of the X-Y displacement controller, mixture controller, and spray controller can be utilized. In some embodiments, additional controllers are utilized to configure the spraying mechanism and the material deposited. -
FIG. 11 conceptually illustrates operation of a deposition head for depositing material having regions with predefined grating characteristics in accordance with an embodiment of the invention. As discussed above, the deposition head can be configured to deposit material having a spatial variation across the grating region of one or more of refractive index modulation, refractive index, birefringence, liquid crystal director alignment and grating layer thickness. As shown inFIG. 11 , thespray module 1100 follows aspraying path 1102 across thesubstrate 1104. The spray can be dynamically controlled during transit along thepath 1102 to vary the predefined grating characteristics in areas of the predefined grating regions such as 1106, 1108, for example. In some embodiments, the deposition mechanism provides, after exposure, a grating with a spatially varying diffraction efficiency. For example, referring again toFIG. 11 , thecoating areas 1106, 1108 (after holographic exposure) exhibit diffraction efficiency (DE) versus angle (U) characteristics represented by thecurves -
FIG. 12 conceptually illustrates a deposition mechanism for depositing two grating layers in accordance with an embodiment of the invention. As shown, thesystem 1200 is similar to that ofFIG. 11 but further includes asecond spray module 1202 providing ajet 1204 for coating the secondgrating layer 1206. In many embodiments, the grating layers are coated using different mixture compositions. In some embodiments, similar to the one ofFIG. 7A , the system includes a first spray module connected to a first reservoir containing a first mixture that includes at least one of a first liquid crystal and a first monomer and a second spray module connected to a second reservoir containing a second mixture that includes at least one of a second liquid crystal and a second monomer. -
FIG. 13 conceptually illustrates a system for depositing a grating layer of material and for holographically exposing the layer using recording beams with on and off states synchronized with the coating module. As shown, thesystem 1300 includes a coating apparatus similar to that ofFIG. 12 following aspraying path 1302 across thesubstrate 1304 providingpredefined grating regions holographic exposure apparatus 1310, which provides arecording beam 1312, can expose coatedpredefined grating regions 1314. In many embodiments, the holographic exposure apparatus is based on a master grating which contact copies the required grating into the predefined grating region. -
FIG. 14 is a flow chart conceptually illustrating a method of depositing a film of material with regions having predefined grating characteristics in accordance with an embodiment of the invention. As shown, themethod 1400 includes providing (1402) a transparent substrate for coating. A grating supporting and non-grating-supporting regions of the substrate can be defined (1404). A mixture containing a liquid crystal and monomer can be provided (1406). In several embodiments, the material utilized includes one or more of a photoinitiator, nano-particles, low-functionality monomers, additives for reducing switching voltage, additives for reducing switching time, additives for increasing refractive index modulation and additives for reducing haze. A spray module for coating the mixture onto the substrate can be provided (1408). The spray module can be set (1410) to its starting position (k=1). The spray module can be moved (1412) to the current position over the substrate. A decision can be made (1414) on whether the current coating apparatus is positioned over a grating supporting region or a non-grating-supporting region. If the coating apparatus is over a grating region, the spray module can be activated (1416) to provide a spray characteristic for achieving a predefined grating characteristic within the grating region. The grating region can be coated (1418). A decision can be made (1420) regarding the coating status. If all specified regions have been coated, the process can be terminated (1422). If all specified regions have not been coated, the next region to be coated can be selected (1424) and the deposition steps can be repeated with k incremented. - Although
FIGS. 10-14 illustrate specific implementations and methods of depositing material with regions having predefined grating characteristics, any of a variety of configurations can be implemented. For example, in many embodiments, multiple spray modules or deposition heads are utilized. Various predefined grating characteristics can be controlled and/or modulated depending on the specific application. Modulation of material composition utilizing more than one deposition head is discussed below in further detail. - As discussed above, deposition processes can be configured to deposit optical recording material that varies spatially in component composition. Modulation of material composition can be implemented in many different ways. In a number of embodiments, an inkjet print head can be configured to modulate material composition by utilizing the various inkjet nozzles within the print head. By altering the composition on a “dot-by-dot” basis, the layer of optical recording material can be deposited such that it has a varying composition across the planar surface of the layer. Such a system can be implemented using a variety of apparatuses including but not limited to inkjet print heads. Similar to how color systems use a palette of only a few colors to produce a spectrum of millions of discrete color values, such as the CMYK system in printers or the additive RGB system in display applications, inkjet print heads in accordance with various embodiments of the invention can be configured to print optical recording materials with varying compositions using only a few reservoirs of different materials. Different types of inkjet print heads can have different precision levels and can print with different resolutions. In many embodiments, a 300 DPI (“dots per inch”) inkjet print head is utilized. Depending on the precision level, discretization of varying compositions of a given number of materials can be determined across a given area. For example, given two types of materials to be printed and an inkjet print head with a precision level of 300 DPI, there are 90,001 possible discrete values of composition ratios of the two types of materials across a square inch for a given volume of printed material if each dot location can contain either one of the two types of materials. In some embodiments, each dot location can contain either one of the two types of materials or both materials. In several embodiments, more than one inkjet print head is configured to print a layer of optical recording material with a spatially varying composition. Although the printed dots for a two-material application are essentially a binary system, in practical applications, averaging the printed dots across an area can allow for discretization of a sliding scale of ratios of the two materials to be printed.
-
FIG. 15 conceptually illustrates an inkjet printing modulation scheme in accordance with an embodiment of the invention. As shown, eighteen discrete unit-squares are each capable of being printed with a varying ratios of two different types of materials. In the illustrated embodiment, the inkjet print head is capable of printing sixty-four dots within each of the eighteen unit squares. Each dot can be printed with either one of two types of material. A close up 1500 of unit square 1502 shows that all sixty-four dot locations within the unit square is printed with the first material. Similarly, a close up 1504 of unit square 1506 is printed completely with the second material. Unit square 1508 shows an intermediate composition where thirty out of the sixty-four dot locations are printed with the first material while the remaining dot locations are printed with the second material. As such,unit square 1508, as a whole, contains an intermediate level of concentrations from both materials. Utilizing this modulation scheme, any pattern of varying material characteristics can be achieved. - The amount of discrete levels of possible concentrations/ratios across a unit square is given by how many dot locations can be printed within the unit square. In the illustrative embodiment, sixty-four discrete dots can be printed within the unit square, which thus results in each unit square having a possibility of sixty-five different concentration combinations, ranging from 100% of the first material to 100% of the second material. Although
FIG. 15 discusses the areas in terms of a unit square, the concepts are applicable to real units and can be determined by the precision level of the inkjet print head. Although specific examples of modulating the material composition of the printed layer are discussed, it can readily be appreciated that the concept of modulating material composition using inkjet print head can be expanded to use more than two different material reservoirs and can vary in precision levels, which largely depends on the type of print head used. - Varying the composition of the material printed can be advantageous for several reasons. For example, in many embodiments, varying the composition of the material during deposition can allow for a waveguide with gratings that have varying diffraction efficiencies across different areas of the gratings. In embodiments utilizing HPDLC mixtures, this can be achieved by modulating the relative concentration of liquid crystals in the HPDLC mixture during the printing process, which creates compositions that can produce gratings with varying diffraction efficiencies when exposed. In several embodiments, a first HPDLC mixture with a certain concentration of liquid crystals and a second HPDLC mixture that is liquid crystal-free are used as the printing palette in an inkjet print head for modulating the diffraction efficiencies of gratings that can be formed in the printed material. In such embodiments, discretization can be determined based on the precision of the inkjet print head. For example, if a 150 DPI inkjet print head is utilized, each square inch can be printed with 22,501 discrete levels of liquid crystal concentration. A discrete level can be given by the concentration/ratio of the materials printed across a certain area. In this example, the discrete levels range from no liquid crystal to the maximum concentration of liquid crystals in the first PDLC mixture.
- The ability to vary the diffraction efficiency across a waveguide can be used for various purposes. Waveguides are typically designed such that light can be reflected many times between the two planar surfaces of a waveguide. These multiple reflections can allow for a light path to interact with a grating multiple times. In many embodiments, a waveguide cell can be printed with varying compositions such that the gratings formed from the optical recording material layer have varying diffraction efficiencies to compensate for the loss of light during interactions with the gratings to allow for a uniform output intensity. For example, in some waveguide applications, an output grating is configured to provide exit pupil expansion in one direction while also coupling light out of the waveguide. The output grating can be designed such that when light within the waveguide interact with the grating, only a percentage of the light is refracted out of the waveguide. The remaining portion continues in the same light path, which remains within TIR and continues to be reflected within the waveguide. Upon a second interaction with the same output grating again, another portion of light is refracted out of the waveguide. During each refraction, the amount of light still traveling within the waveguide decreases by the amount refracted out of the waveguide. As such, the portions refracted at each interaction gradually decreases in terms of total intensity. By varying the diffraction efficiencies of the grating such that it increases with propagation distance, the decrease in output intensity along each interaction can be compensated, allowing for a uniform output intensity.
- Varying the diffraction efficiency can also be used to compensate for other attenuation of light within a waveguide. All objects have a degree of reflection and absorption. Light trapped in TIR within a waveguide are continually reflected between the two surfaces of the waveguide. Depending on the material that makes up the surfaces, portions of light can be absorbed by the material during each interaction. In many cases, this attenuation is small, but can be substantial across a large area where many reflections occur. In many embodiments, a waveguide cell can be printed with varying compositions such that the gratings formed from the optical recording material layer have varying diffraction efficiencies to compensate for the absorption of light from the substrates. Depending on the substrates, certain wavelengths can be more prone to absorption by the substrates. In a multi-layer waveguide design, each layer can be designed to couple in a certain range of wavelengths of light. Accordingly, the light coupled by these individual layers can be absorbed in different amounts by the substrates of the layers. For example, in a number of embodiments, the waveguide is made of a 3-layer stack to implement a color display, where each layer is designed for one of Red, Green, and Blue. In such embodiments, gratings within each of the waveguide layers can be formed to have varying diffraction efficiencies to perform color balance optimization by compensating for color imbalance due to loss of transmission of certain wavelengths of light.
- In addition to varying the liquid crystal concentration within the material in order to vary the diffraction efficiency, another technique includes varying the thickness of the waveguide cell. This can be accomplished through the use of beads. In many embodiments, beads are dispersed throughout the optical recording material for structural support during the construction of the waveguide cell. In some embodiments, different sizes of beads are dispersed throughout the optical recording material. The beads can be dispersed in ascending order of sizes across one direction of the layer of optical recording material. When the waveguide cell is constructed through lamination, the substrates sandwich the optical recording material and, with structural support from the varying sizes of beads, create a wedge shaped layer of optical recording material. Beads of varying sizes can be dispersed similar to the modulation process described above. Additionally, modulating bead sizes can be combined with modulation of material compositions. In several embodiments, reservoirs of HPDLC materials each suspended with beads of different sizes are used to print a layer of HPDLC material with beads of varying sizes strategically dispersed to form a wedge shaped waveguide cell. In a number of embodiments, bead size modulation is combined with material composition modulation by providing an amount of reservoirs equal to the product of the number of different sizes of beads and the number of different materials used. For example, in one embodiment, the inkjet print head is configured to print varying concentrations of liquid crystal with two different bead sizes. In such an embodiment, four reservoirs can be prepared: a liquid crystal-free mixture-suspension with beads of a first size, a liquid crystal-free mixture-suspension with beads of a second size, a liquid crystal-rich mixture-suspension with beads of a first size, and a liquid crystal-rich mixture-suspension with beads of a second size.
- In many embodiments, the workcell cluster includes a lamination workcell for laminating the waveguide cell. After the deposition of optical recording material onto a substrate, a second substrate can be placed onto the optical recording material, creating a three-layer composite. Oftentimes, the second substrate will be made of the same material and in the same dimensions as the first substrate. In many embodiments, the deposition workcell is configured to place the second substrate onto the optical recording material. In other embodiments, the lamination workcell is configured to place the second substrate onto the optical recording material. The second substrate can be placed manually or through the use of mechanical arms and/or suction mechanisms. Once the second substrate is placed, the three-layer composite may be too unstable to handle manually and, thus, in many embodiments, a laminator is implemented to compact the composite.
- The three-layer composite can be laminated in various ways. In many embodiments, a press is implemented to provide downward pressure onto the composite. In other embodiments, the lamination workcell is configured to feed the composite through a roller laminator. The compacted composite and adhesion properties of the optical recording material can result in a waveguide cell with enough stability to be handled manually. In some embodiments, the layer of optical recording material includes beads. Consequently, these relatively incompressible beads can define the height of the layer of optical recording material within the compacted composite. As discussed in the sections above, differently sized beads can be placed throughout the optical recording material. Upon lamination, the sizes of the beads can each determine the local thickness of the waveguide cell. By varying the sizes of the beads, a wedge shaped waveguide cell can be constructed. As can readily be appreciated, the lamination of the substrates-optical recording material layer composite can be achieved using lamination workcells that can be configured and implemented in many different ways. In several embodiments, the lamination workcell is a modular workcell within the workcell cluster. In other embodiments, the lamination workcell is simply a laminator implemented within the deposition workcell, such as the one shown in
FIGS. 3A and 3B . - Although specific systems and methods for manufacturing waveguide cells are discussed above, many different configurations can be implemented in accordance with many different embodiments of the invention. It is therefore to be understood that the present invention can be practiced in ways other than specifically described, without departing from the scope and spirit of the present invention. Thus, embodiments of the present invention should be considered in all respects as illustrative and not restrictive. Accordingly, the scope of the invention should be determined not by the embodiments illustrated, but by the appended claims and their equivalents.
Claims (20)
1. A method for manufacturing waveguide cells, the method comprising;
providing a first substrate;
determining a predefined grating characteristic; and
depositing a layer of optical recording material onto the first substrate using at least one deposition head, wherein the optical recording material deposited over the grating region is formulated to achieve the predefined grating characteristic.
2. The method of claim 1 , further comprising:
providing a second substrate;
placing the second substrate onto the deposited layer of optical recording material; and
laminating the first substrate, the layer of optical recording material, and the second substrate.
3. The method of claim 1 , wherein depositing the layer of optical recording material comprises:
providing a first mixture of optical recording material;
providing a second mixture of optical recording material; and
depositing the first and second mixtures of optical recording material onto the first substrate in a predetermined pattern using the at least one deposition head.
4. The method of claim 3 , wherein:
the first mixture of optical recording material comprises a first bead; and
the second mixture of optical recording material comprises a second bead that is a different size from the first bead.
5. The method of claim 3 , wherein the first mixture of optical recording material has a different percentage by weight of liquid crystals than the second mixture of optical recording material.
6. The method of claim 3 , further comprising defining a grating region and a nongrating region on the first substrate, wherein:
the first mixture of optical recording material comprises a liquid crystal and a monomer;
the second mixture of optical recording material comprises a monomer; and
depositing the first and second mixtures of optical recording material onto the first substrate in the predetermined pattern comprises:
depositing the first mixture of optical recording material over the grating region; and
depositing the second mixture of optical recording material over the nongrating region.
7. The method of claim 3 , wherein the first mixture of optical recording material is a polymer dispersed liquid crystal mixture comprising:
a monomer;
a liquid crystal;
a photoinitiator dye; and
a coinitiator.
8. The method of claim 7 , wherein the polymer dispersed liquid crystal mixture comprises an additive selected from the group consisting of: a photoinitiator, nano particles, low-functionality monomers, additives for reducing switching voltage, additives for reducing switching time, additives for increasing refractive index modulation, and additives for reducing haze.
9. The method of claim 1 , wherein the at least one deposition head comprises at least one inkjet print head.
10. The method of claim 8 , wherein depositing the layer of optical recording material comprises:
providing a first mixture of optical recording material;
providing a second mixture of optical recording material;
printing a first dot of the first mixture of optical recording material using the at least one inkjet print head; and
printing a second dot of the second mixture of optical recording material adjacent to the first dot using the at least one inkjet print head.
11. The method of claim 9 , wherein:
the at least one inkjet print head comprises a first inkjet print head and a second inkjet print head; and
depositing the layer of optical recording material comprises:
providing a first mixture of optical recording material;
providing a second mixture of optical recording material;
printing the first mixture of optical recording material onto the first substrate using the first inkjet print head; and
printing the second mixture of optical recording material onto the first substrate using the second inkjet print head.
12. The method of claim 1 , wherein the predefined grating characteristic comprises a characteristic selected from the group consisting of: refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
13. The method of claim 1 , wherein the predefined grating characteristic comprises a spatial variation of a characteristic selected from the group consisting of: refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
14. The method of claim 1 , wherein the predefined grating characteristic results in a grating after exposure, the grating having a spatially varying diffraction efficiency.
15. A system for fabricating a grating, the system comprising:
at least one deposition head connected to at least one reservoir containing at least one mixture of optical recording material;
a first substrate having at least one predefined region for supporting gratings;
a positioning element capable of positioning the at least one deposition head across the first substrate, wherein:
the at least one deposition head is configured to deposit the at least one mixture of optical recording material onto the first substrate using the positioning element; and
the deposited material provides a predefined grating characteristic within the at least one predefined grating region after holographic exposure.
16. The system of claim 15 , wherein the at least one deposition head is connected to a first reservoir containing a first mixture of optical recording material and a second reservoir containing a second mixture of optical recording material.
17. The system of claim 16 , wherein the first mixture of optical recording material comprises a liquid crystal and a monomer; and the second mixture of optical recording material comprises a monomer; wherein the at least one deposition head is configured to deposit the first mixture of optical recording material onto the at least one predefined grating region.
18. The system of claim 15 , wherein the at least one deposition head comprises at least one inkjet print head.
19. The system of claim 15 , wherein the predefined grating characteristic comprises a characteristic selected from the group consisting of: refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.
20. The system of claim 15 , wherein the predefined grating characteristic results in a grating after exposure, the grating having a spatially varying diffraction efficiency.
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Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180364486A1 (en) * | 2017-06-16 | 2018-12-20 | Journey Technology, Ltd. | Optical apparatus and waveguide display apparatus |
US10678053B2 (en) | 2009-04-27 | 2020-06-09 | Digilens Inc. | Diffractive projection apparatus |
CN111367004A (en) * | 2020-04-29 | 2020-07-03 | 刘奡 | Ink-jet printing preparation method of polarizer holographic grating |
US10732569B2 (en) | 2018-01-08 | 2020-08-04 | Digilens Inc. | Systems and methods for high-throughput recording of holographic gratings in waveguide cells |
WO2020168348A1 (en) | 2019-02-15 | 2020-08-20 | Digilens Inc. | Methods and apparatuses for providing a holographic waveguide display using integrated gratings |
US10914950B2 (en) | 2018-01-08 | 2021-02-09 | Digilens Inc. | Waveguide architectures and related methods of manufacturing |
WO2021041949A1 (en) * | 2019-08-29 | 2021-03-04 | Digilens Inc. | Evacuating bragg gratings and methods of manufacturing |
US11106048B2 (en) | 2014-08-08 | 2021-08-31 | Digilens Inc. | Waveguide laser illuminator incorporating a despeckler |
US11194162B2 (en) | 2017-01-05 | 2021-12-07 | Digilens Inc. | Wearable heads up displays |
US11194159B2 (en) | 2015-01-12 | 2021-12-07 | Digilens Inc. | Environmentally isolated waveguide display |
US11194098B2 (en) | 2015-02-12 | 2021-12-07 | Digilens Inc. | Waveguide grating device |
WO2022015878A1 (en) * | 2020-07-14 | 2022-01-20 | Digilens Inc. | Nanoparticle-based holographic photopolymer materials and related applications |
US11256155B2 (en) | 2012-01-06 | 2022-02-22 | Digilens Inc. | Contact image sensor using switchable Bragg gratings |
US11281013B2 (en) | 2015-10-05 | 2022-03-22 | Digilens Inc. | Apparatus for providing waveguide displays with two-dimensional pupil expansion |
US11287666B2 (en) | 2011-08-24 | 2022-03-29 | Digilens, Inc. | Wearable data display |
JP2022530215A (en) * | 2019-09-30 | 2022-06-28 | エルジー・ケム・リミテッド | Holographic optical element and its manufacturing method |
US11378732B2 (en) | 2019-03-12 | 2022-07-05 | DigLens Inc. | Holographic waveguide backlight and related methods of manufacturing |
US11402801B2 (en) | 2018-07-25 | 2022-08-02 | Digilens Inc. | Systems and methods for fabricating a multilayer optical structure |
US11443547B2 (en) | 2013-07-31 | 2022-09-13 | Digilens Inc. | Waveguide device incorporating beam direction selective light absorber |
US11448937B2 (en) | 2012-11-16 | 2022-09-20 | Digilens Inc. | Transparent waveguide display for tiling a display having plural optical powers using overlapping and offset FOV tiles |
US11487131B2 (en) | 2011-04-07 | 2022-11-01 | Digilens Inc. | Laser despeckler based on angular diversity |
US11513350B2 (en) | 2016-12-02 | 2022-11-29 | Digilens Inc. | Waveguide device with uniform output illumination |
US11561409B2 (en) | 2007-07-26 | 2023-01-24 | Digilens Inc. | Laser illumination device |
US11604314B2 (en) | 2016-03-24 | 2023-03-14 | Digilens Inc. | Method and apparatus for providing a polarization selective holographic waveguide device |
US11650448B2 (en) * | 2018-12-11 | 2023-05-16 | Fujifilm Corporation | Liquid crystal diffraction element and light guide element |
US11681143B2 (en) | 2019-07-29 | 2023-06-20 | Digilens Inc. | Methods and apparatus for multiplying the image resolution and field-of-view of a pixelated display |
US11726323B2 (en) | 2014-09-19 | 2023-08-15 | Digilens Inc. | Method and apparatus for generating input images for holographic waveguide displays |
US11726332B2 (en) | 2009-04-27 | 2023-08-15 | Digilens Inc. | Diffractive projection apparatus |
US20230273432A1 (en) * | 2022-02-03 | 2023-08-31 | Microsoft Technology Licensing, Llc | Slanted surface relief grating replication by optical proximity recording |
US11747568B2 (en) | 2019-06-07 | 2023-09-05 | Digilens Inc. | Waveguides incorporating transmissive and reflective gratings and related methods of manufacturing |
US12092914B2 (en) | 2018-01-08 | 2024-09-17 | Digilens Inc. | Systems and methods for manufacturing waveguide cells |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021103198A (en) * | 2019-12-24 | 2021-07-15 | 大日本印刷株式会社 | Optical member, display device, head-mounted display device, and manufacturing method of optical member |
CN114603890A (en) * | 2020-12-08 | 2022-06-10 | 深南电路股份有限公司 | Manufacturing device of organic optical waveguide element and spray head assembly thereof |
CN112848282B (en) * | 2021-01-07 | 2021-11-26 | 芯体素(杭州)科技发展有限公司 | Organic optical waveguide preparation method based on embedded 3D printing |
WO2023250390A2 (en) * | 2022-06-21 | 2023-12-28 | Digilens Inc. | Harmonic gratings utilizing evacuated periodic structures |
CN115857178B (en) * | 2023-03-01 | 2023-06-16 | 南昌虚拟现实研究院股份有限公司 | Holographic optical waveguide lens and preparation method thereof |
Family Cites Families (1491)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001242411A (en) | 1999-05-10 | 2001-09-07 | Asahi Glass Co Ltd | Hologram display device |
US1043938A (en) | 1911-08-17 | 1912-11-12 | Friedrich Huttenlocher | Safety device for gas-lamps. |
US2141884A (en) | 1936-11-12 | 1938-12-27 | Zeiss Carl Fa | Photographic objective |
US3482498A (en) | 1967-05-09 | 1969-12-09 | Trw Inc | Ridge pattern recording apparatus |
GB1332433A (en) | 1969-10-24 | 1973-10-03 | Smiths Industries Ltd | Head-up display apparatus |
DE2115312C3 (en) | 1971-03-30 | 1975-06-26 | Hoechst Ag, 6000 Frankfurt | Heatable spinning shaft |
US3843231A (en) | 1971-04-22 | 1974-10-22 | Commissariat Energie Atomique | Liquid crystal diffraction grating |
US3851303A (en) | 1972-11-17 | 1974-11-26 | Sundstrand Data Control | Head up display and pitch generator |
JPS4992850U (en) | 1972-12-01 | 1974-08-12 | ||
US3885095A (en) | 1973-04-30 | 1975-05-20 | Hughes Aircraft Co | Combined head-up multisensor display |
US3965029A (en) | 1974-02-04 | 1976-06-22 | Kent State University | Liquid crystal materials |
US3975711A (en) | 1974-08-30 | 1976-08-17 | Sperry Rand Corporation | Real time fingerprint recording terminal |
US4066334A (en) | 1975-01-06 | 1978-01-03 | National Research Development Corporation | Liquid crystal light deflector |
US4082432A (en) | 1975-01-09 | 1978-04-04 | Sundstrand Data Control, Inc. | Head-up visual display system using on-axis optics with image window at the focal plane of the collimating mirror |
US3940204A (en) | 1975-01-23 | 1976-02-24 | Hughes Aircraft Company | Optical display systems utilizing holographic lenses |
US4035068A (en) | 1975-06-25 | 1977-07-12 | Xerox Corporation | Speckle minimization in projection displays by reducing spatial coherence of the image light |
GB1548164A (en) | 1975-06-25 | 1979-07-04 | Penrose R | Set of tiles for covering a surface |
US3993399A (en) | 1975-07-24 | 1976-11-23 | Trw Systems And Energy | Universal holographic optics orientation assembly |
GB1525573A (en) | 1975-09-13 | 1978-09-20 | Pilkington Perkin Elmer Ltd | Lenses |
US4099841A (en) | 1976-06-30 | 1978-07-11 | Elliott Brothers (London) Limited | Head up displays using optical combiner with three or more partially reflective films |
GB1584268A (en) | 1977-03-28 | 1981-02-11 | Elliott Brothers London Ltd | Head-up displays |
US4251137A (en) | 1977-09-28 | 1981-02-17 | Rca Corporation | Tunable diffractive subtractive filter |
US4322163A (en) | 1977-10-25 | 1982-03-30 | Fingermatrix Inc. | Finger identification |
US4218111A (en) | 1978-07-10 | 1980-08-19 | Hughes Aircraft Company | Holographic head-up displays |
GB2041562B (en) | 1978-12-21 | 1983-09-01 | Redifon Simulation Ltd | Visual display apparatus |
DE3000402A1 (en) | 1979-01-19 | 1980-07-31 | Smiths Industries Ltd | DISPLAY DEVICE |
US4248093A (en) | 1979-04-13 | 1981-02-03 | The Boeing Company | Holographic resolution of complex sound fields |
US4389612A (en) | 1980-06-17 | 1983-06-21 | S.H.E. Corporation | Apparatus for reducing low frequency noise in dc biased SQUIDS |
GB2182159B (en) | 1980-08-21 | 1987-10-14 | Secr Defence | Head-up displays |
US4403189A (en) | 1980-08-25 | 1983-09-06 | S.H.E. Corporation | Superconducting quantum interference device having thin film Josephson junctions |
US4386361A (en) | 1980-09-26 | 1983-05-31 | S.H.E. Corporation | Thin film SQUID with low inductance |
US4544267A (en) | 1980-11-25 | 1985-10-01 | Fingermatrix, Inc. | Finger identification |
JPS5789722A (en) | 1980-11-25 | 1982-06-04 | Sharp Corp | Manufacture of display cell |
IL62627A (en) | 1981-04-10 | 1984-09-30 | Yissum Res Dev Co | Eye testing system |
US4418993A (en) | 1981-05-07 | 1983-12-06 | Stereographics Corp. | Stereoscopic zoom lens system for three-dimensional motion pictures and television |
US4562463A (en) | 1981-05-15 | 1985-12-31 | Stereographics Corp. | Stereoscopic television system with field storage for sequential display of right and left images |
US4472037A (en) | 1981-08-24 | 1984-09-18 | Stereographics Corporation | Additive color means for the calibration of stereoscopic projection |
US4523226A (en) | 1982-01-27 | 1985-06-11 | Stereographics Corporation | Stereoscopic television system |
US4566758A (en) | 1983-05-09 | 1986-01-28 | Tektronix, Inc. | Rapid starting, high-speed liquid crystal variable optical retarder |
US4884876A (en) | 1983-10-30 | 1989-12-05 | Stereographics Corporation | Achromatic liquid crystal shutter for stereoscopic and other applications |
EP0180592B1 (en) | 1984-03-19 | 1995-08-02 | Kent State University | Light modulating material comprising a liquid crystal dispersion in a synthetic resin matrix |
US4583117A (en) | 1984-07-17 | 1986-04-15 | Stereographics Corporation | Stereoscopic video camera |
US4729640A (en) | 1984-10-03 | 1988-03-08 | Canon Kabushiki Kaisha | Liquid crystal light modulation device |
US4643515A (en) | 1985-04-01 | 1987-02-17 | Environmental Research Institute Of Michigan | Method and apparatus for recording and displaying edge-illuminated holograms |
US4728547A (en) | 1985-06-10 | 1988-03-01 | General Motors Corporation | Liquid crystal droplets dispersed in thin films of UV-curable polymers |
US4711512A (en) | 1985-07-12 | 1987-12-08 | Environmental Research Institute Of Michigan | Compact head-up display |
JPS6232425A (en) | 1985-08-05 | 1987-02-12 | Brother Ind Ltd | Optical deflector |
US4890902A (en) | 1985-09-17 | 1990-01-02 | Kent State University | Liquid crystal light modulating materials with selectable viewing angles |
US4743083A (en) | 1985-12-30 | 1988-05-10 | Schimpe Robert M | Cylindrical diffraction grating couplers and distributed feedback resonators for guided wave devices |
US4647967A (en) | 1986-01-28 | 1987-03-03 | Sundstrand Data Control, Inc. | Head-up display independent test site |
US4799765A (en) | 1986-03-31 | 1989-01-24 | Hughes Aircraft Company | Integrated head-up and panel display unit |
US5148302A (en) | 1986-04-10 | 1992-09-15 | Akihiko Nagano | Optical modulation element having two-dimensional phase type diffraction grating |
US4923848A (en) | 1986-04-11 | 1990-05-08 | Dai Nippon Insatsu Kabushiki Kaisha | Image formation on objective bodies |
US5707925A (en) | 1986-04-11 | 1998-01-13 | Dai Nippon Insatsu Kabushiki Kaisha | Image formation on objective bodies |
US4970129A (en) | 1986-12-19 | 1990-11-13 | Polaroid Corporation | Holograms |
US4749256A (en) | 1987-02-13 | 1988-06-07 | Gec Avionics, Inc. | Mounting apparatus for head-up display |
US4811414A (en) | 1987-02-27 | 1989-03-07 | C.F.A. Technologies, Inc. | Methods for digitally noise averaging and illumination equalizing fingerprint images |
DE3881252D1 (en) | 1987-03-30 | 1993-07-01 | Siemens Ag | INTEGRATED-OPTICAL ARRANGEMENT FOR BIDIRECTIONAL OPTICAL MESSAGE OR SIGNAL TRANSMISSION. |
FR2613497B1 (en) | 1987-03-31 | 1991-08-16 | Thomson Csf | BINOCULAR, HOLOGRAPHIC AND LARGE FIELD SIGHT, USED ON HELMET |
US4775218A (en) | 1987-04-17 | 1988-10-04 | Flight Dynamics, Inc. | Combiner alignment detector for head up display system |
US4791788A (en) | 1987-08-24 | 1988-12-20 | Quantum Design, Inc. | Method for obtaining improved temperature regulation when using liquid helium cooling |
US4848093A (en) | 1987-08-24 | 1989-07-18 | Quantum Design | Apparatus and method for regulating temperature in a cryogenic test chamber |
US5710645A (en) | 1993-01-29 | 1998-01-20 | Imedge Technology, Inc. | Grazing incidence holograms and system and method for producing the same |
US20050259302A9 (en) | 1987-09-11 | 2005-11-24 | Metz Michael H | Holographic light panels and flat panel display systems and method and apparatus for making same |
US5822089A (en) | 1993-01-29 | 1998-10-13 | Imedge Technology Inc. | Grazing incidence holograms and system and method for producing the same |
GB8723050D0 (en) | 1987-10-01 | 1987-11-04 | British Telecomm | Optical filters |
EP0382791A4 (en) | 1987-10-27 | 1992-05-06 | Night Vision General Partnership | Compact see-through night vision goggles |
US4792850A (en) | 1987-11-25 | 1988-12-20 | Sterographics Corporation | Method and system employing a push-pull liquid crystal modulator |
JP2667029B2 (en) | 1987-12-30 | 1997-10-22 | ヒューズ・エアクラフト・カンパニー | Manufacturing method of composite material used for liquid crystal display device, liquid crystal display device, and composite material used for liquid crystal display device |
US5096282A (en) | 1988-01-05 | 1992-03-17 | Hughes Aircraft Co. | Polymer dispersed liquid crystal film devices |
US4938568A (en) | 1988-01-05 | 1990-07-03 | Hughes Aircraft Company | Polymer dispersed liquid crystal film devices, and method of forming the same |
US4933976A (en) | 1988-01-25 | 1990-06-12 | C.F.A. Technologies, Inc. | System for generating rolled fingerprint images |
US5240636A (en) | 1988-04-11 | 1993-08-31 | Kent State University | Light modulating materials comprising a liquid crystal microdroplets dispersed in a birefringent polymeric matri method of making light modulating materials |
US4994204A (en) | 1988-11-04 | 1991-02-19 | Kent State University | Light modulating materials comprising a liquid crystal phase dispersed in a birefringent polymeric phase |
US4854688A (en) | 1988-04-14 | 1989-08-08 | Honeywell Inc. | Optical arrangement |
US5119454A (en) | 1988-05-23 | 1992-06-02 | Polaroid Corporation | Bulk optic wavelength division multiplexer |
JPH01306886A (en) | 1988-06-03 | 1989-12-11 | Canon Inc | Volume phase type diffraction grating |
US5150234A (en) | 1988-08-08 | 1992-09-22 | Olympus Optical Co., Ltd. | Imaging apparatus having electrooptic devices comprising a variable focal length lens |
US5004323A (en) | 1988-08-30 | 1991-04-02 | Kent State University | Extended temperature range polymer dispersed liquid crystal light shutters |
US4964701A (en) | 1988-10-04 | 1990-10-23 | Raytheon Company | Deflector for an optical beam |
US5007711A (en) | 1988-11-30 | 1991-04-16 | Flight Dynamics, Inc. | Compact arrangement for head-up display components |
US4928301A (en) | 1988-12-30 | 1990-05-22 | Bell Communications Research, Inc. | Teleconferencing terminal with camera behind display screen |
JPH02186319A (en) | 1989-01-13 | 1990-07-20 | Fujitsu Ltd | Display system |
US5033814A (en) | 1989-04-10 | 1991-07-23 | Nilford Laboratories, Inc. | Line light source |
US5009483A (en) | 1989-04-12 | 1991-04-23 | Rockwell Iii Marshall A | Optical waveguide display system |
FI82989C (en) | 1989-04-13 | 1991-05-10 | Nokia Oy Ab | FRAMEWORK FOR FRAMING REQUIREMENTS AND INSPECTION. |
US5183545A (en) | 1989-04-28 | 1993-02-02 | Branca Phillip A | Electrolytic cell with composite, porous diaphragm |
FR2647556B1 (en) | 1989-05-23 | 1993-10-29 | Thomson Csf | OPTICAL DEVICE FOR INTRODUCING A COLLIMATED IMAGE INTO THE VISUAL FIELD OF AN OBSERVER AND HELMET COMPRISING AT LEAST ONE SUCH DEVICE |
US5099343A (en) | 1989-05-25 | 1992-03-24 | Hughes Aircraft Company | Edge-illuminated liquid crystal display devices |
US4967268A (en) | 1989-07-31 | 1990-10-30 | Stereographics | Liquid crystal shutter system for stereoscopic and other applications |
JPH05502304A (en) | 1989-08-21 | 1993-04-22 | アモス,カール・アール | Method and apparatus for manipulating electromagnetic phenomena |
US5016953A (en) | 1989-08-31 | 1991-05-21 | Hughes Aircraft Company | Reduction of noise in computer generated holograms |
US4960311A (en) | 1989-08-31 | 1990-10-02 | Hughes Aircraft Company | Holographic exposure system for computer generated holograms |
US4963007A (en) | 1989-09-05 | 1990-10-16 | U.S. Precision Lens, Inc. | Color corrected projection lens |
US5210624A (en) | 1989-09-19 | 1993-05-11 | Fujitsu Limited | Heads-up display |
US4971719A (en) | 1989-09-22 | 1990-11-20 | General Motors Corporation | Polymer dispersed liquid crystal films formed by electron beam curing |
US5138687A (en) | 1989-09-26 | 1992-08-11 | Omron Corporation | Rib optical waveguide and method of manufacturing the same |
US5198912A (en) | 1990-01-12 | 1993-03-30 | Polaroid Corporation | Volume phase hologram with liquid crystal in microvoids between fringes |
US5109465A (en) | 1990-01-16 | 1992-04-28 | Summit Technology, Inc. | Beam homogenizer |
JPH03239384A (en) | 1990-02-16 | 1991-10-24 | Fujitsu Ltd | Semiconductor laser protective circuit |
US5416616A (en) | 1990-04-06 | 1995-05-16 | University Of Southern California | Incoherent/coherent readout of double angularly multiplexed volume holographic optical elements |
US5117302A (en) | 1990-04-13 | 1992-05-26 | Stereographics Corporation | High dynamic range electro-optical shutter for steroscopic and other applications |
US5153751A (en) | 1990-04-27 | 1992-10-06 | Central Glass Company, Limited | Holographic display element |
CA2044932C (en) | 1990-06-29 | 1996-03-26 | Masayuki Kato | Display unit |
FI86226C (en) | 1990-07-10 | 1992-07-27 | Nokia Oy Ab | Process for producing light wave conductors by ion exchange technique on a glass substrate |
US5225918A (en) | 1990-07-18 | 1993-07-06 | Sony Magnescale, Inc. | Hologram scale, apparatus for making hologram scale, moving member having hologram scale assembled hologram scale and apparatus for making assembled hologram scale |
FI86225C (en) | 1990-08-23 | 1992-07-27 | Nokia Oy Ab | Adaptation elements for interconnecting different light waveguides and manufacturing process for the same |
US5110034A (en) | 1990-08-30 | 1992-05-05 | Quantum Magnetics, Inc. | Superconducting bonds for thin film devices |
US5139192A (en) | 1990-08-30 | 1992-08-18 | Quantum Magnetics, Inc. | Superconducting bonds for thin film devices |
US5053834A (en) | 1990-08-31 | 1991-10-01 | Quantum Magnetics, Inc. | High symmetry dc SQUID system |
DE4028275A1 (en) | 1990-09-06 | 1992-03-12 | Kabelmetal Electro Gmbh | METHOD FOR THE PRODUCTION OF FIBERGLASS FIBER OPTICS WITH INCREASED STRENGTH |
US5142357A (en) | 1990-10-11 | 1992-08-25 | Stereographics Corp. | Stereoscopic video camera with image sensors having variable effective position |
US5063441A (en) | 1990-10-11 | 1991-11-05 | Stereographics Corporation | Stereoscopic video cameras with image sensors having variable effective position |
US10593092B2 (en) | 1990-12-07 | 2020-03-17 | Dennis J Solomon | Integrated 3D-D2 visual effects display |
US5619586A (en) | 1990-12-20 | 1997-04-08 | Thorn Emi Plc | Method and apparatus for producing a directly viewable image of a fingerprint |
US5416514A (en) | 1990-12-27 | 1995-05-16 | North American Philips Corporation | Single panel color projection video display having control circuitry for synchronizing the color illumination system with reading/writing of the light valve |
US5410370A (en) | 1990-12-27 | 1995-04-25 | North American Philips Corporation | Single panel color projection video display improved scanning |
US5159445A (en) | 1990-12-31 | 1992-10-27 | At&T Bell Laboratories | Teleconferencing video display system for improving eye contact |
US5867238A (en) | 1991-01-11 | 1999-02-02 | Minnesota Mining And Manufacturing Company | Polymer-dispersed liquid crystal device having an ultraviolet-polymerizable matrix and a variable optical transmission and a method for preparing same |
US5117285A (en) | 1991-01-15 | 1992-05-26 | Bell Communications Research | Eye contact apparatus for video conferencing |
US5481321A (en) | 1991-01-29 | 1996-01-02 | Stereographics Corp. | Stereoscopic motion picture projection system |
US5142644A (en) | 1991-03-08 | 1992-08-25 | General Motors Corporation | Electrical contacts for polymer dispersed liquid crystal films |
US5317405A (en) | 1991-03-08 | 1994-05-31 | Nippon Telegraph And Telephone Corporation | Display and image capture apparatus which enables eye contact |
GB9105520D0 (en) | 1991-03-15 | 1991-05-01 | Marconi Gec Ltd | Holograms |
JP2970033B2 (en) | 1991-03-30 | 1999-11-02 | 凸版印刷株式会社 | Head-up display |
JP2998272B2 (en) | 1991-03-30 | 2000-01-11 | 凸版印刷株式会社 | Head-up display |
JP2873126B2 (en) | 1991-04-17 | 1999-03-24 | 日本ペイント株式会社 | Photosensitive composition for volume hologram recording |
US6104448A (en) | 1991-05-02 | 2000-08-15 | Kent State University | Pressure sensitive liquid crystalline light modulating device and material |
US5695682A (en) | 1991-05-02 | 1997-12-09 | Kent State University | Liquid crystalline light modulating device and material |
US5453863A (en) | 1991-05-02 | 1995-09-26 | Kent State University | Multistable chiral nematic displays |
US5241337A (en) | 1991-05-13 | 1993-08-31 | Eastman Kodak Company | Real image viewfinder requiring no field lens |
US5181133A (en) | 1991-05-15 | 1993-01-19 | Stereographics Corporation | Drive method for twisted nematic liquid crystal shutters for stereoscopic and other applications |
US5268792A (en) | 1991-05-20 | 1993-12-07 | Eastman Kodak Company | Zoom lens |
US5218360A (en) | 1991-05-23 | 1993-06-08 | Trw Inc. | Millimeter-wave aircraft landing and taxing system |
JPH0728999Y2 (en) | 1991-05-29 | 1995-07-05 | セントラル硝子株式会社 | Glass for multicolor display head-up display |
FR2677463B1 (en) | 1991-06-04 | 1994-06-17 | Thomson Csf | COLLIMATE VISUAL WITH LARGE HORIZONTAL AND VERTICAL FIELDS, PARTICULARLY FOR SIMULATORS. |
US5299289A (en) | 1991-06-11 | 1994-03-29 | Matsushita Electric Industrial Co., Ltd. | Polymer dispersed liquid crystal panel with diffraction grating |
US5764414A (en) | 1991-08-19 | 1998-06-09 | Hughes Aircraft Company | Biocular display system using binary optics |
US5416510A (en) | 1991-08-28 | 1995-05-16 | Stereographics Corporation | Camera controller for stereoscopic video system |
US5193000A (en) | 1991-08-28 | 1993-03-09 | Stereographics Corporation | Multiplexing technique for stereoscopic video system |
WO1993005436A1 (en) | 1991-08-29 | 1993-03-18 | Merk Patent Gesellschaft Mit Beschränkter Haftung | Electrooptical liquid crystal system |
US5200861A (en) | 1991-09-27 | 1993-04-06 | U.S. Precision Lens Incorporated | Lens systems |
US5224198A (en) | 1991-09-30 | 1993-06-29 | Motorola, Inc. | Waveguide virtual image display |
DE69228644T2 (en) | 1991-10-09 | 1999-11-18 | Denso Corp | hologram |
US5726782A (en) | 1991-10-09 | 1998-03-10 | Nippondenso Co., Ltd. | Hologram and method of fabricating |
US5315440A (en) | 1991-11-04 | 1994-05-24 | Eastman Kodak Company | Zoom lens having weak front lens group |
US5515184A (en) | 1991-11-12 | 1996-05-07 | The University Of Alabama In Huntsville | Waveguide hologram illuminators |
US5198914A (en) | 1991-11-26 | 1993-03-30 | Hughes Aircraft Company | Automatic constant wavelength holographic exposure system |
US5633100A (en) | 1991-11-27 | 1997-05-27 | E. I. Du Pont De Nemours And Company | Holographic imaging using filters |
US5218480A (en) | 1991-12-03 | 1993-06-08 | U.S. Precision Lens Incorporated | Retrofocus wide angle lens |
FR2684805B1 (en) | 1991-12-04 | 1998-08-14 | France Telecom | VERY LOW RESISTANCE OPTOELECTRONIC DEVICE. |
US5239372A (en) | 1991-12-31 | 1993-08-24 | Stereographics Corporation | Stereoscopic video projection system |
US5264950A (en) | 1992-01-06 | 1993-11-23 | Kent State University | Light modulating device with polarizer and liquid crystal interspersed as spherical or randomly distorted droplets in isotropic polymer |
US5303085A (en) | 1992-02-07 | 1994-04-12 | Rallison Richard D | Optically corrected helmet mounted display |
US5295208A (en) | 1992-02-26 | 1994-03-15 | The University Of Alabama In Huntsville | Multimode waveguide holograms capable of using non-coherent light |
US5296967A (en) | 1992-03-02 | 1994-03-22 | U.S. Precision Lens Incorporated | High speed wide angle projection TV lens system |
US5528720A (en) | 1992-03-23 | 1996-06-18 | Minnesota Mining And Manufacturing Co. | Tapered multilayer luminaire devices |
EP0564869A1 (en) | 1992-03-31 | 1993-10-13 | MERCK PATENT GmbH | Electrooptical liquid crystal systems |
DE69325555D1 (en) | 1992-04-27 | 1999-08-12 | Merck Patent Gmbh | ELECTROOPTIC LIQUID CRYSTAL SYSTEM |
US5284499A (en) | 1992-05-01 | 1994-02-08 | Corning Incorporated | Method and apparatus for drawing optical fibers |
US5327269A (en) | 1992-05-13 | 1994-07-05 | Standish Industries, Inc. | Fast switching 270° twisted nematic liquid crystal device and eyewear incorporating the device |
KR100320567B1 (en) | 1992-05-18 | 2002-06-20 | Liquid Crystal Light Modulators & Materials | |
US5251048A (en) | 1992-05-18 | 1993-10-05 | Kent State University | Method and apparatus for electronic switching of a reflective color display |
EP0641372B1 (en) | 1992-05-18 | 1999-04-21 | Kent State University | Liquid crystalline light modulating device & material |
US5315419A (en) | 1992-05-19 | 1994-05-24 | Kent State University | Method of producing a homogeneously aligned chiral smectic C liquid crystal having homeotropic alignment layers |
US5368770A (en) | 1992-06-01 | 1994-11-29 | Kent State University | Method of preparing thin liquid crystal films |
EP0575791B1 (en) | 1992-06-10 | 1997-05-07 | Sharp Corporation | Liquid crystal composite layer of dispersion type, production method thereof and liquid crystal material to be used therein |
US6479193B1 (en) | 1992-06-30 | 2002-11-12 | Nippon Sheet Glass Co., Ltd. | Optical recording film and process for production thereof |
JP2958418B2 (en) | 1992-07-23 | 1999-10-06 | セントラル硝子株式会社 | Display device |
JP3027065B2 (en) | 1992-07-31 | 2000-03-27 | 日本電信電話株式会社 | Display / imaging device |
US5313330A (en) | 1992-08-31 | 1994-05-17 | U.S. Precision Lens Incorporated | Zoom projection lens systems |
US5243413A (en) | 1992-09-02 | 1993-09-07 | At&T Bell Laboratories | Color parallax-free camera and display |
EP0585941A3 (en) | 1992-09-03 | 1994-09-21 | Nippon Denso Co | Process for making holograms and holography device |
US5343147A (en) | 1992-09-08 | 1994-08-30 | Quantum Magnetics, Inc. | Method and apparatus for using stochastic excitation and a superconducting quantum interference device (SAUID) to perform wideband frequency response measurements |
US6052540A (en) | 1992-09-11 | 2000-04-18 | Canon Kabushiki Kaisha | Viewfinder device for displaying photographic information relating to operation of a camera |
US5321533A (en) | 1992-09-24 | 1994-06-14 | Kent State Universtiy | Polymer dispersed ferroelectric smectic liquid crystal |
US5455693A (en) | 1992-09-24 | 1995-10-03 | Hughes Aircraft Company | Display hologram |
US7132200B1 (en) | 1992-11-27 | 2006-11-07 | Dai Nippon Printing Co., Ltd. | Hologram recording sheet, holographic optical element using said sheet, and its production process |
US5315324A (en) | 1992-12-09 | 1994-05-24 | Delphax Systems | High precision charge imaging cartridge |
WO1994014098A1 (en) | 1992-12-14 | 1994-06-23 | Nippondenso Co., Ltd. | Image display |
US5341230A (en) | 1992-12-22 | 1994-08-23 | Hughes Aircraft Company | Waveguide holographic telltale display |
US5418584A (en) | 1992-12-31 | 1995-05-23 | Honeywell Inc. | Retroreflective array virtual image projection screen |
US6151142A (en) | 1993-01-29 | 2000-11-21 | Imedge Technology, Inc. | Grazing incidence holograms and system and method for producing the same |
US5351151A (en) | 1993-02-01 | 1994-09-27 | Levy George S | Optical filter using microlens arrays |
US5371817A (en) | 1993-02-16 | 1994-12-06 | Eastman Kodak Company | Multichannel optical waveguide page scanner with individually addressable electro-optic modulators |
US5428480A (en) | 1993-02-16 | 1995-06-27 | Eastman Kodak Company | Zoom lens having weak plastic element |
US5751452A (en) | 1993-02-22 | 1998-05-12 | Nippon Telegraph And Telephone Corporation | Optical devices with high polymer material and method of forming the same |
WO1994019712A1 (en) | 1993-02-26 | 1994-09-01 | Yeda Research & Development Co., Ltd. | Holographic optical devices |
US5682255A (en) | 1993-02-26 | 1997-10-28 | Yeda Research & Development Co. Ltd. | Holographic optical devices for the transmission of optical signals of a plurality of channels |
US5371626A (en) | 1993-03-09 | 1994-12-06 | Benopcon, Inc. | Wide angle binocular system with variable power capability |
JP2823470B2 (en) | 1993-03-09 | 1998-11-11 | シャープ株式会社 | Optical scanning device, display device using the same, and image information input / output device |
US5359362A (en) | 1993-03-30 | 1994-10-25 | Nec Usa, Inc. | Videoconference system using a virtual camera image |
US5309283A (en) | 1993-03-30 | 1994-05-03 | U.S. Precision Lens Incorporated | Hybrid, color-corrected, projection TV lens system |
JP3202831B2 (en) | 1993-04-09 | 2001-08-27 | 日本電信電話株式会社 | Method for manufacturing reflective color liquid crystal display |
EP0620469B1 (en) | 1993-04-16 | 1997-10-01 | Central Glass Company, Limited | Glass pane with reflectance reducing coating and combiner of head-up display system |
AU6667994A (en) | 1993-04-28 | 1994-11-21 | R. Douglas Mcpheters | Holographic operator interface |
US5471326A (en) | 1993-04-30 | 1995-11-28 | Northrop Grumman Corporation | Holographic laser scanner and rangefinder |
CA2139124A1 (en) | 1993-05-03 | 1994-11-10 | Anthony F. Jacobine | Polymer dispersed liquid crystals in electron-rich alkene-thiol polymers |
US5579026A (en) | 1993-05-14 | 1996-11-26 | Olympus Optical Co., Ltd. | Image display apparatus of head mounted type |
FR2706079B1 (en) | 1993-06-02 | 1995-07-21 | France Telecom | Integrated laser-modulator monolithic component with quantum multi-well structure. |
US5329363A (en) | 1993-06-15 | 1994-07-12 | U. S. Precision Lens Incorporated | Projection lens systems having reduced spherochromatism |
US5400069A (en) | 1993-06-16 | 1995-03-21 | Bell Communications Research, Inc. | Eye contact video-conferencing system and screen |
JP3623250B2 (en) | 1993-06-23 | 2005-02-23 | オリンパス株式会社 | Video display device |
US5455713A (en) | 1993-06-23 | 1995-10-03 | Kreitzer; Melvyn H. | High performance, thermally-stabilized projection television lens systems |
US5585035A (en) | 1993-08-06 | 1996-12-17 | Minnesota Mining And Manufacturing Company | Light modulating device having a silicon-containing matrix |
JPH0798439A (en) | 1993-09-29 | 1995-04-11 | Nippon Telegr & Teleph Corp <Ntt> | Three-dimensional stereoscopic display device |
US5537232A (en) | 1993-10-05 | 1996-07-16 | In Focus Systems, Inc. | Reflection hologram multiple-color filter array formed by sequential exposure to a light source |
US5686975A (en) | 1993-10-18 | 1997-11-11 | Stereographics Corporation | Polarel panel for stereoscopic displays |
US5408346A (en) | 1993-10-20 | 1995-04-18 | Kaiser Electro-Optics, Inc. | Optical collimating device employing cholesteric liquid crystal and a non-transmissive reflector |
US5485313A (en) | 1993-10-27 | 1996-01-16 | Polaroid Corporation | Zoom lens systems |
IL107502A (en) | 1993-11-04 | 1999-12-31 | Elbit Systems Ltd | Helmet display mounting system |
US5991087A (en) | 1993-11-12 | 1999-11-23 | I-O Display System Llc | Non-orthogonal plate in a virtual reality or heads up display |
US5438357A (en) | 1993-11-23 | 1995-08-01 | Mcnelley; Steve H. | Image manipulating teleconferencing system |
US5757546A (en) | 1993-12-03 | 1998-05-26 | Stereographics Corporation | Electronic stereoscopic viewer |
US5524272A (en) | 1993-12-22 | 1996-06-04 | Gte Airfone Incorporated | Method and apparatus for distributing program material |
GB2286057A (en) | 1994-01-21 | 1995-08-02 | Sharp Kk | Electrically controllable grating |
US5559637A (en) | 1994-02-04 | 1996-09-24 | Corning Incorporated | Field curvature corrector |
US5677797A (en) | 1994-02-04 | 1997-10-14 | U.S. Precision Lens Inc. | Method for correcting field curvature |
US5463428A (en) | 1994-02-08 | 1995-10-31 | Stereographics Corporation | Wireless active eyewear for stereoscopic applications |
US5631107A (en) | 1994-02-18 | 1997-05-20 | Nippondenso Co., Ltd. | Method for producing optical member |
JP3453836B2 (en) | 1994-02-18 | 2003-10-06 | 株式会社デンソー | Hologram manufacturing method |
CA2183567A1 (en) | 1994-02-18 | 1995-08-24 | Michael H. Metz | Method of producing and detecting high-contrast images of the surface topography of objects and a compact system for carrying out the same |
US5986746A (en) | 1994-02-18 | 1999-11-16 | Imedge Technology Inc. | Topographical object detection system |
JPH07270615A (en) | 1994-03-31 | 1995-10-20 | Central Glass Co Ltd | Holographic laminated body |
JPH10502500A (en) | 1994-04-15 | 1998-03-03 | アイトゲネーシッシェ テヒニッシェ ホッホシューレ チューリッヒ | Transmission network system with high transmission capacity for communication |
CA2187889A1 (en) | 1994-04-29 | 1995-11-09 | Bruce A. Nerad | Light modulating device having a matrix prepared from acid reactants |
US7126583B1 (en) | 1999-12-15 | 2006-10-24 | Automotive Technologies International, Inc. | Interactive vehicle display system |
US5473222A (en) | 1994-07-05 | 1995-12-05 | Delco Electronics Corporation | Active matrix vacuum fluorescent display with microprocessor integration |
WO1996002862A1 (en) | 1994-07-15 | 1996-02-01 | Matsushita Electric Industrial Co., Ltd. | Head-up display apparatus, liquid crystal display panel and production method thereof |
US5612733A (en) | 1994-07-18 | 1997-03-18 | C-Phone Corporation | Optics orienting arrangement for videoconferencing system |
US5493430A (en) | 1994-08-03 | 1996-02-20 | Kent Display Systems, L.P. | Color, reflective liquid crystal displays |
US5499118A (en) | 1994-08-31 | 1996-03-12 | Hughes Aircraft Company | System for copying multiple holograms |
US5606433A (en) | 1994-08-31 | 1997-02-25 | Hughes Electronics | Lamination of multilayer photopolymer holograms |
US5903395A (en) | 1994-08-31 | 1999-05-11 | I-O Display Systems Llc | Personal visual display system |
JPH08129146A (en) | 1994-09-05 | 1996-05-21 | Olympus Optical Co Ltd | Video display device |
US5727098A (en) | 1994-09-07 | 1998-03-10 | Jacobson; Joseph M. | Oscillating fiber optic display and imager |
US6167169A (en) | 1994-09-09 | 2000-12-26 | Gemfire Corporation | Scanning method and architecture for display |
US5647036A (en) | 1994-09-09 | 1997-07-08 | Deacon Research | Projection display with electrically-controlled waveguide routing |
US5544268A (en) | 1994-09-09 | 1996-08-06 | Deacon Research | Display panel with electrically-controlled waveguide-routing |
FI98871C (en) | 1994-09-15 | 1997-08-25 | Nokia Telecommunications Oy | Method of tuning a summation network into a base station and a bandpass filter |
US5572248A (en) | 1994-09-19 | 1996-11-05 | Teleport Corporation | Teleconferencing method and system for providing face-to-face, non-animated teleconference environment |
US5506929A (en) | 1994-10-19 | 1996-04-09 | Clio Technologies, Inc. | Light expanding system for producing a linear or planar light beam from a point-like light source |
US5572250A (en) | 1994-10-20 | 1996-11-05 | Stereographics Corporation | Universal electronic stereoscopic display |
US5500671A (en) | 1994-10-25 | 1996-03-19 | At&T Corp. | Video conference system and method of providing parallax correction and a sense of presence |
SG47360A1 (en) | 1994-11-14 | 1998-04-17 | Hoffmann La Roche | Colour display with serially-connected lc filters |
US5625495A (en) | 1994-12-07 | 1997-04-29 | U.S. Precision Lens Inc. | Telecentric lens systems for forming an image of an object composed of pixels |
US5745301A (en) | 1994-12-19 | 1998-04-28 | Benopcon, Inc. | Variable power lens systems for producing small images |
US5748277A (en) | 1995-02-17 | 1998-05-05 | Kent State University | Dynamic drive method and apparatus for a bistable liquid crystal display |
US6154190A (en) | 1995-02-17 | 2000-11-28 | Kent State University | Dynamic drive methods and apparatus for a bistable liquid crystal display |
US6061463A (en) | 1995-02-21 | 2000-05-09 | Imedge Technology, Inc. | Holographic fingerprint device |
TW334520B (en) | 1995-02-24 | 1998-06-21 | Matsushita Electric Ind Co Ltd | Display device Liquid crystal display |
JP3658034B2 (en) | 1995-02-28 | 2005-06-08 | キヤノン株式会社 | Image observation optical system and imaging optical system |
US5583795A (en) | 1995-03-17 | 1996-12-10 | The United States Of America As Represented By The Secretary Of The Army | Apparatus for measuring eye gaze and fixation duration, and method therefor |
US6259559B1 (en) | 1995-03-28 | 2001-07-10 | Central Glass Company, Limited | Glass arrangement including an outside glass plate, a polarization direction changing film and an adhesive layer therebetween, and an inside glass layer |
US5621529A (en) | 1995-04-05 | 1997-04-15 | Intelligent Automation Systems, Inc. | Apparatus and method for projecting laser pattern with reduced speckle noise |
US5764619A (en) | 1995-04-07 | 1998-06-09 | Matsushita Electric Industrial Co., Ltd. | Optical recording medium having two separate recording layers |
US5619254A (en) | 1995-04-11 | 1997-04-08 | Mcnelley; Steve H. | Compact teleconferencing eye contact terminal |
US5668614A (en) | 1995-05-01 | 1997-09-16 | Kent State University | Pixelized liquid crystal display materials including chiral material adopted to change its chirality upon photo-irradiation |
US5543950A (en) | 1995-05-04 | 1996-08-06 | Kent State University | Liquid crystalline electrooptical device |
FI98584C (en) | 1995-05-05 | 1997-07-10 | Nokia Technology Gmbh | Method and apparatus for processing a received signal |
CA2190941C (en) | 1995-05-15 | 2001-01-02 | Chungte W. Chen | Low-cost light-weight head-mounted virtual-image projection display with low moments of inertia and low center of gravity |
US5831700A (en) | 1995-05-19 | 1998-11-03 | Kent State University | Polymer stabilized four domain twisted nematic liquid crystal display |
US5825448A (en) | 1995-05-19 | 1998-10-20 | Kent State University | Reflective optically active diffractive device |
US5929946A (en) | 1995-05-23 | 1999-07-27 | Colorlink, Inc. | Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization |
US5680231A (en) | 1995-06-06 | 1997-10-21 | Hughes Aircraft Company | Holographic lenses with wide angular and spectral bandwidths for use in a color display device |
US5694230A (en) | 1995-06-07 | 1997-12-02 | Digital Optics Corp. | Diffractive optical elements as combiners |
US5671035A (en) | 1995-06-07 | 1997-09-23 | Barnes; Elwood E. | Light intensity reduction apparatus and method |
WO1997001133A1 (en) | 1995-06-23 | 1997-01-09 | Holoplex | Multiplexed hologram copying system and method |
US5629764A (en) | 1995-07-07 | 1997-05-13 | Advanced Precision Technology, Inc. | Prism fingerprint sensor using a holographic optical element |
JPH0933853A (en) | 1995-07-20 | 1997-02-07 | Denso Corp | Hologram display device |
FI99221C (en) | 1995-08-25 | 1997-10-27 | Nokia Telecommunications Oy | Planar antenna construction |
DE69629257T2 (en) | 1995-09-21 | 2004-04-22 | 3M Innovative Properties Co., St. Paul | Lens system for television projection device |
US5907436A (en) | 1995-09-29 | 1999-05-25 | The Regents Of The University Of California | Multilayer dielectric diffraction gratings |
US5999282A (en) | 1995-11-08 | 1999-12-07 | Victor Company Of Japan, Ltd. | Color filter and color image display apparatus employing the filter |
US5612734A (en) | 1995-11-13 | 1997-03-18 | Bell Communications Research, Inc. | Eye contact apparatus employing a directionally transmissive layer for video conferencing |
US5724189A (en) | 1995-12-15 | 1998-03-03 | Mcdonnell Douglas Corporation | Methods and apparatus for creating an aspheric optical element and the aspheric optical elements formed thereby |
JP3250782B2 (en) | 1995-12-25 | 2002-01-28 | セントラル硝子株式会社 | Laminate |
JPH09185313A (en) | 1995-12-27 | 1997-07-15 | Asahi Glass Co Ltd | Manufacture of hologram |
US5668907A (en) | 1996-01-11 | 1997-09-16 | Associated Universities, Inc. | Thin optical display panel |
EP0785457A3 (en) | 1996-01-17 | 1998-10-14 | Nippon Telegraph And Telephone Corporation | Optical device and three-dimensional display device |
WO1997027519A1 (en) | 1996-01-29 | 1997-07-31 | Foster-Miller, Inc. | Optical components containing complex diffraction gratings and methods for the fabrication thereof |
US5963375A (en) | 1996-01-31 | 1999-10-05 | U.S. Precision Lens Inc. | Athermal LCD projection lens |
US6166834A (en) | 1996-03-15 | 2000-12-26 | Matsushita Electric Industrial Co., Ltd. | Display apparatus and method for forming hologram suitable for the display apparatus |
JP2000506998A (en) | 1996-03-15 | 2000-06-06 | レティナル ディスプレイ ケイマン リミティッド | Method and apparatus for viewing images |
GB2312109B (en) | 1996-03-29 | 2000-08-02 | Advanced Saw Prod Sa | Acoustic wave filter |
GB2312110B (en) | 1996-03-29 | 2000-07-05 | Advanced Saw Prod Sa | Acoustic wave filter |
US5701132A (en) | 1996-03-29 | 1997-12-23 | University Of Washington | Virtual retinal display with expanded exit pupil |
US5841587A (en) | 1996-04-29 | 1998-11-24 | U.S. Precision Lens Inc. | LCD projection lens |
WO1997041461A1 (en) | 1996-04-29 | 1997-11-06 | U.S. Precision Lens Incorporated | Lcd projection lens |
EP0896690B1 (en) | 1996-04-29 | 2003-09-03 | 3M Innovative Properties Company | Projection television lens system |
US5729242A (en) | 1996-05-08 | 1998-03-17 | Hughes Electronics | Dual PDLC-projection head-up display |
US6583838B1 (en) | 1996-05-10 | 2003-06-24 | Kent State University | Bistable liquid crystal display device using polymer stabilization |
US6061107A (en) | 1996-05-10 | 2000-05-09 | Kent State University | Bistable polymer dispersed cholesteric liquid crystal displays |
US6133975A (en) | 1996-05-10 | 2000-10-17 | Kent State University | Bistable liquid crystal display device using polymer stabilization |
US5870228A (en) | 1996-05-24 | 1999-02-09 | U.S. Precision Lens Inc. | Projection lenses having larger back focal length to focal length ratios |
US5969874A (en) | 1996-05-30 | 1999-10-19 | U.S. Precision Lens Incorporated | Long focal length projection lenses |
CA2207226C (en) | 1996-06-10 | 2005-06-21 | Sumitomo Electric Industries, Ltd. | Optical fiber grating and method of manufacturing the same |
US6550949B1 (en) | 1996-06-13 | 2003-04-22 | Gentex Corporation | Systems and components for enhancing rear vision from a vehicle |
US6821457B1 (en) | 1998-07-29 | 2004-11-23 | Science Applications International Corporation | Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects |
US7077984B1 (en) | 1996-07-12 | 2006-07-18 | Science Applications International Corporation | Electrically switchable polymer-dispersed liquid crystal materials |
US7312906B2 (en) | 1996-07-12 | 2007-12-25 | Science Applications International Corporation | Switchable polymer-dispersed liquid crystal optical elements |
US5942157A (en) | 1996-07-12 | 1999-08-24 | Science Applications International Corporation | Switchable volume hologram materials and devices |
US6867888B2 (en) | 1996-07-12 | 2005-03-15 | Science Applications International Corporation | Switchable polymer-dispersed liquid crystal optical elements |
US6323989B1 (en) | 1996-07-19 | 2001-11-27 | E Ink Corporation | Electrophoretic displays using nanoparticles |
GB2315902A (en) | 1996-08-01 | 1998-02-11 | Sharp Kk | LIquid crystal device |
US5847787A (en) | 1996-08-05 | 1998-12-08 | Motorola, Inc. | Low driving voltage polymer dispersed liquid crystal display device with conductive nanoparticles |
DE19632111C1 (en) | 1996-08-08 | 1998-02-12 | Pelikan Produktions Ag | Thermal transfer ribbon for luminescent characters |
US5857043A (en) | 1996-08-12 | 1999-01-05 | Corning Incorporated | Variable period amplitude grating mask and method for use |
EP0825474B1 (en) | 1996-08-16 | 2003-11-26 | 3M Innovative Properties Company | Mini-zoom projection lenses for use with pixelized panels |
US5856842A (en) | 1996-08-26 | 1999-01-05 | Kaiser Optical Systems Corporation | Apparatus facilitating eye-contact video communications |
KR100206688B1 (en) | 1996-09-07 | 1999-07-01 | 박원훈 | Color holographic head up display |
JPH1096903A (en) | 1996-09-25 | 1998-04-14 | Sumitomo Bakelite Co Ltd | Liquid crystal display element and its production |
US5936776A (en) | 1996-09-27 | 1999-08-10 | U.S. Precision Lens Inc. | Focusable front projection lens systems for use with large screen formats |
US5745266A (en) | 1996-10-02 | 1998-04-28 | Raytheon Company | Quarter-wave film for brightness enhancement of holographic thin taillamp |
US5886822A (en) | 1996-10-08 | 1999-03-23 | The Microoptical Corporation | Image combining system for eyeglasses and face masks |
JP4007633B2 (en) | 1996-10-09 | 2007-11-14 | 株式会社島津製作所 | Head up display |
FR2755530B1 (en) | 1996-11-05 | 1999-01-22 | Thomson Csf | VISUALIZATION DEVICE AND FLAT TELEVISION SCREEN USING THE SAME |
JP4155343B2 (en) | 1996-11-12 | 2008-09-24 | ミラージュ イノベーションズ リミテッド | An optical system for guiding light from two scenes to the viewer's eye alternatively or simultaneously |
JPH10148787A (en) | 1996-11-20 | 1998-06-02 | Central Glass Co Ltd | Display |
US5962147A (en) | 1996-11-26 | 1999-10-05 | General Latex And Chemical Corporation | Method of bonding with a natural rubber latex and laminate produced |
KR100506516B1 (en) | 1996-11-29 | 2005-08-05 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Lenses for electronic imaging systems |
US6366281B1 (en) | 1996-12-06 | 2002-04-02 | Stereographics Corporation | Synthetic panoramagram |
US6864927B1 (en) | 1996-12-31 | 2005-03-08 | Micron Technology, Inc. | Head up display with adjustable transparency screen |
US5907416A (en) | 1997-01-27 | 1999-05-25 | Raytheon Company | Wide FOV simulator heads-up display with selective holographic reflector combined |
US5875012A (en) | 1997-01-31 | 1999-02-23 | Xerox Corporation | Broadband reflective display, and methods of forming the same |
US5790314A (en) | 1997-01-31 | 1998-08-04 | Jds Fitel Inc. | Grin lensed optical device |
US6133971A (en) | 1997-01-31 | 2000-10-17 | Xerox Corporation | Holographically formed reflective display, liquid crystal display and projection system and methods of forming the same |
US5956113A (en) | 1997-01-31 | 1999-09-21 | Xerox Corporation | Bistable reflective display and methods of forming the same |
US5877826A (en) | 1997-02-06 | 1999-03-02 | Kent State University | Dual frequency switchable cholesteric liquid crystal light shutter and driving waveform |
US5937115A (en) | 1997-02-12 | 1999-08-10 | Foster-Miller, Inc. | Switchable optical components/structures and methods for the fabrication thereof |
US6567573B1 (en) | 1997-02-12 | 2003-05-20 | Digilens, Inc. | Switchable optical components |
US5900987A (en) | 1997-02-13 | 1999-05-04 | U.S. Precision Lens Inc | Zoom projection lenses for use with pixelized panels |
US5798641A (en) | 1997-03-17 | 1998-08-25 | Quantum Design, Inc. | Torque magnetometer utilizing integrated piezoresistive levers |
US6034752A (en) | 1997-03-22 | 2000-03-07 | Kent Displays Incorporated | Display device reflecting visible and infrared radiation |
US6156243A (en) | 1997-04-25 | 2000-12-05 | Hoya Corporation | Mold and method of producing the same |
FI971850A (en) | 1997-04-30 | 1998-10-31 | Nokia Telecommunications Oy | Arrangements for reducing interference between radio frequency signals |
US5868951A (en) | 1997-05-09 | 1999-02-09 | University Technology Corporation | Electro-optical device and method |
US5999089A (en) | 1997-05-13 | 1999-12-07 | Carlson; Lance K. | Alarm system |
US5973727A (en) | 1997-05-13 | 1999-10-26 | New Light Industries, Ltd. | Video image viewing device and method |
GB2325530A (en) | 1997-05-22 | 1998-11-25 | Sharp Kk | Liquid crystal device |
FI103619B (en) | 1997-05-26 | 1999-07-30 | Nokia Telecommunications Oy | Optical multiplexing and demultiplexing |
US6608720B1 (en) | 1997-06-02 | 2003-08-19 | Robin John Freeman | Optical instrument and optical element thereof |
JPH1115358A (en) | 1997-06-25 | 1999-01-22 | Denso Corp | Hologram |
CN1202427C (en) | 1997-07-11 | 2005-05-18 | 3M创新有限公司 | High performance projection television lens systems |
US7164818B2 (en) | 2001-05-03 | 2007-01-16 | Neophontonics Corporation | Integrated gradient index lenses |
US5930433A (en) | 1997-07-23 | 1999-07-27 | Hewlett-Packard Company | Waveguide array document scanner |
US6417971B1 (en) | 1997-08-05 | 2002-07-09 | U.S. Precision Lens Incorporated | Zoom projection lens having a lens correction unit |
AU9103798A (en) | 1997-08-13 | 1999-03-08 | Foster-Miller Inc. | Switchable optical components |
US6141154A (en) | 1997-08-22 | 2000-10-31 | U.S. Precision Lens Inc. | Focusable, color corrected, high performance projection lens systems |
JPH1167448A (en) | 1997-08-26 | 1999-03-09 | Toyota Central Res & Dev Lab Inc | Display device |
US7028899B2 (en) | 1999-06-07 | 2006-04-18 | Metrologic Instruments, Inc. | Method of speckle-noise pattern reduction and apparatus therefore based on reducing the temporal-coherence of the planar laser illumination beam before it illuminates the target object by applying temporal phase modulation techniques during the transmission of the plib towards the target |
JP3535710B2 (en) | 1997-09-16 | 2004-06-07 | キヤノン株式会社 | Optical element and optical system using the same |
JP2953444B2 (en) | 1997-10-01 | 1999-09-27 | 日本電気株式会社 | Liquid crystal display device and manufacturing method thereof |
US6285813B1 (en) | 1997-10-03 | 2001-09-04 | Georgia Tech Research Corporation | Diffractive grating coupler and method |
US5903396A (en) | 1997-10-17 | 1999-05-11 | I/O Display Systems, Llc | Intensified visual display |
US5929960A (en) | 1997-10-17 | 1999-07-27 | Kent State University | Method for forming liquid crystal display cell walls using a patterned electric field |
US6486997B1 (en) | 1997-10-28 | 2002-11-26 | 3M Innovative Properties Company | Reflective LCD projection system using wide-angle Cartesian polarizing beam splitter |
US6324014B1 (en) | 1997-11-13 | 2001-11-27 | Corning Precision Lens | Wide field of view projection lenses for compact projection lens systems employing pixelized panels |
JP3331559B2 (en) | 1997-11-13 | 2002-10-07 | 日本電信電話株式会社 | Optical device |
DE19751190A1 (en) | 1997-11-19 | 1999-05-20 | Bosch Gmbh Robert | Laser display device has a polymer-dispersed liquid crystal disk |
US6046585A (en) | 1997-11-21 | 2000-04-04 | Quantum Design, Inc. | Method and apparatus for making quantitative measurements of localized accumulations of target particles having magnetic particles bound thereto |
US6437563B1 (en) | 1997-11-21 | 2002-08-20 | Quantum Design, Inc. | Method and apparatus for making measurements of accumulations of magnetically susceptible particles combined with analytes |
US5949508A (en) | 1997-12-10 | 1999-09-07 | Kent State University | Phase separated composite organic film and methods for the manufacture thereof |
US6864861B2 (en) | 1997-12-31 | 2005-03-08 | Brillian Corporation | Image generator having a miniature display device |
US6195206B1 (en) | 1998-01-13 | 2001-02-27 | Elbit Systems Ltd. | Optical system for day and night use |
JP3500963B2 (en) | 1998-01-22 | 2004-02-23 | 日本ビクター株式会社 | Master hologram |
US6266167B1 (en) | 1998-02-27 | 2001-07-24 | Zebra Imaging, Inc. | Apparatus and method for replicating a hologram using a steerable beam |
US6975345B1 (en) | 1998-03-27 | 2005-12-13 | Stereographics Corporation | Polarizing modulator for an electronic stereoscopic display |
DE69912759T2 (en) | 1998-04-02 | 2004-09-30 | Elop Electro-Optics Industries Ltd. | Optical holographic device |
US6176837B1 (en) | 1998-04-17 | 2001-01-23 | Massachusetts Institute Of Technology | Motion tracking system |
US6268839B1 (en) | 1998-05-12 | 2001-07-31 | Kent State University | Drive schemes for gray scale bistable cholesteric reflective displays |
US6204835B1 (en) | 1998-05-12 | 2001-03-20 | Kent State University | Cumulative two phase drive scheme for bistable cholesteric reflective displays |
JPH11326617A (en) | 1998-05-13 | 1999-11-26 | Olympus Optical Co Ltd | Optical system including diffraction optical element and its design method |
EP0957477A3 (en) | 1998-05-15 | 2003-11-05 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium, recording and reproducing method therefor and optical information recording and reproduction apparatus |
GB2337859B (en) | 1998-05-29 | 2002-12-11 | Nokia Mobile Phones Ltd | Antenna |
US6388797B1 (en) | 1998-05-29 | 2002-05-14 | Stereographics Corporation | Electrostereoscopic eyewear |
US6341118B1 (en) | 1998-06-02 | 2002-01-22 | Science Applications International Corporation | Multiple channel scanning device using oversampling and image processing to increase throughput |
KR100553060B1 (en) | 1998-06-24 | 2006-02-15 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Projection television lens systems having improved modulation transfer functions |
US6411444B1 (en) | 1998-06-30 | 2002-06-25 | Corning Precision Lens, Incorporated | Lenses for electronic imaging systems having long wavelength filtering properties |
US6064354A (en) | 1998-07-01 | 2000-05-16 | Deluca; Michael Joseph | Stereoscopic user interface method and apparatus |
US20030202228A1 (en) | 1998-07-07 | 2003-10-30 | Kenichiro Takada | Hologram screen and a method of producing the same |
US6137630A (en) | 1998-07-13 | 2000-10-24 | Industrial Technology Research Institute | Thin-film multilayer systems for use in a head-up display |
US6222971B1 (en) | 1998-07-17 | 2001-04-24 | David Slobodin | Small inlet optical panel and a method of making a small inlet optical panel |
US6618104B1 (en) | 1998-07-28 | 2003-09-09 | Nippon Telegraph And Telephone Corporation | Optical device having reverse mode holographic PDLC and front light guide |
IL125558A (en) | 1998-07-28 | 2003-06-24 | Elbit Systems Ltd | Non-adjustable helmet mounted optical systems |
AU5460899A (en) | 1998-07-29 | 2000-02-21 | Digilens Inc. | In-line infinity display system employing one or more switchable holographic optical elements |
JP3643486B2 (en) | 1998-08-04 | 2005-04-27 | 株式会社東芝 | Optical functional device and optical communication system |
JP2000056259A (en) | 1998-08-10 | 2000-02-25 | Fuji Xerox Co Ltd | Picture display device |
US6169594B1 (en) | 1998-08-24 | 2001-01-02 | Physical Optics Corporation | Beam deflector and scanner |
US6188462B1 (en) | 1998-09-02 | 2001-02-13 | Kent State University | Diffraction grating with electrically controlled periodicity |
KR100533451B1 (en) | 1998-09-02 | 2005-12-06 | 세이코 엡슨 가부시키가이샤 | Light source and display device |
US20020127497A1 (en) | 1998-09-10 | 2002-09-12 | Brown Daniel J. W. | Large diffraction grating for gas discharge laser |
US6278429B1 (en) | 1998-09-11 | 2001-08-21 | Kent State University | Bistable reflective cholesteric liquid crystal displays utilizing super twisted nematic driver chips |
US20020126332A1 (en) | 1998-09-14 | 2002-09-12 | Popovich Milan M. | System and method for modulating light intesity |
US6115152A (en) | 1998-09-14 | 2000-09-05 | Digilens, Inc. | Holographic illumination system |
JP4052741B2 (en) | 1998-09-30 | 2008-02-27 | セントラル硝子株式会社 | Laminated glass for reflective displays |
US6082862A (en) | 1998-10-16 | 2000-07-04 | Digilens, Inc. | Image tiling technique based on electrically switchable holograms |
US6101008A (en) | 1998-10-16 | 2000-08-08 | Digilens, Inc. | Autostereoscopic display based on electrically switchable holograms |
WO2000023832A1 (en) | 1998-10-16 | 2000-04-27 | Digilens Inc. | Holographic display system |
FI105856B (en) | 1998-10-21 | 2000-10-13 | Nokia Networks Oy | WDM optical signal gain |
AU1215400A (en) | 1998-10-21 | 2000-05-08 | Paul G. Duncan | Methods and apparatus for optically measuring polarization rotation of optical wave fronts using rare earth iron garnets |
US6414760B1 (en) | 1998-10-29 | 2002-07-02 | Hewlett-Packard Company | Image scanner with optical waveguide and enhanced optical sampling rate |
US6567014B1 (en) | 1998-11-05 | 2003-05-20 | Rockwell Collins, Inc. | Aircraft head up display system |
EP1129382A2 (en) | 1998-11-12 | 2001-09-05 | Digilens Inc. | Head mounted apparatus for viewing an image |
EP1129370B1 (en) | 1998-11-12 | 2006-02-08 | 3M Innovative Properties Company | Color corrected projection lenses employing diffractive optical surfaces |
US6850210B1 (en) | 1998-11-12 | 2005-02-01 | Stereographics Corporation | Parallax panoramagram having improved depth and sharpness |
US6222675B1 (en) | 1998-12-01 | 2001-04-24 | Kaiser Electro-Optics, Inc. | Area of interest head-mounted display using low resolution, wide angle; high resolution, narrow angle; and see-through views |
US6078427A (en) | 1998-12-01 | 2000-06-20 | Kaiser Electro-Optics, Inc. | Smooth transition device for area of interest head-mounted display |
US6744478B1 (en) | 1998-12-28 | 2004-06-01 | Central Glass Company, Limited | Heads-up display system with optical rotation layers |
US6317189B1 (en) | 1998-12-29 | 2001-11-13 | Xerox Corporation | High-efficiency reflective liquid crystal display |
US6185016B1 (en) | 1999-01-19 | 2001-02-06 | Digilens, Inc. | System for generating an image |
US6191887B1 (en) | 1999-01-20 | 2001-02-20 | Tropel Corporation | Laser illumination with speckle reduction |
US6320563B1 (en) | 1999-01-21 | 2001-11-20 | Kent State University | Dual frequency cholesteric display and drive scheme |
US6301057B1 (en) | 1999-02-02 | 2001-10-09 | Corning Precision Lens | Long focal length projection lenses |
JP4089071B2 (en) | 1999-03-10 | 2008-05-21 | ブラザー工業株式会社 | Head mounted camera |
US6266166B1 (en) | 1999-03-08 | 2001-07-24 | Dai Nippon Printing Co., Ltd. | Self-adhesive film for hologram formation, dry plate for photographing hologram, and method for image formation using the same |
JP2000321962A (en) | 1999-03-10 | 2000-11-24 | Victor Co Of Japan Ltd | Master hologram and production of hologram filter by using the master hologram |
EP1037123A3 (en) | 1999-03-16 | 2002-09-04 | E.I. Du Pont De Nemours & Company Incorporated | Method and element for holographic replication |
JP2000267042A (en) | 1999-03-17 | 2000-09-29 | Fuji Xerox Co Ltd | Head-mounted type video display device |
US6269203B1 (en) | 1999-03-17 | 2001-07-31 | Radiant Photonics | Holographic optical devices for transmission of optical signals |
JP2000267552A (en) | 1999-03-19 | 2000-09-29 | Sony Corp | Device and method for image recording and recording medium |
US6504629B1 (en) | 1999-03-23 | 2003-01-07 | Digilens, Inc. | Method and apparatus for illuminating a display |
US6909443B1 (en) | 1999-04-06 | 2005-06-21 | Microsoft Corporation | Method and apparatus for providing a three-dimensional task gallery computer interface |
JP4548680B2 (en) | 1999-04-12 | 2010-09-22 | 大日本印刷株式会社 | Color hologram display and method for producing the same |
US6107943A (en) | 1999-04-16 | 2000-08-22 | Rockwell Collins, Inc. | Display symbology indicating aircraft ground motion deceleration |
US6121899A (en) | 1999-04-16 | 2000-09-19 | Rockwell Collins, Inc. | Impending aircraft tail strike warning display symbology |
DE19917751C2 (en) | 1999-04-20 | 2001-05-31 | Nokia Networks Oy | Method and monitoring device for monitoring the quality of data transmission over analog lines |
US6195209B1 (en) | 1999-05-04 | 2001-02-27 | U.S. Precision Lens Incorporated | Projection lenses having reduced lateral color for use with pixelized panels |
CA2272008A1 (en) | 1999-05-11 | 2000-11-11 | Francois Trepanier | Device and method for recording an interference pattern in a photosensitive medium |
SE516715C2 (en) | 1999-05-26 | 2002-02-19 | Ericsson Telefon Ab L M | Main mount display |
US6306563B1 (en) * | 1999-06-21 | 2001-10-23 | Corning Inc. | Optical devices made from radiation curable fluorinated compositions |
FR2796184B1 (en) | 1999-07-09 | 2001-11-02 | Thomson Csf | SECURE DOCUMENT, MANUFACTURING SYSTEM, AND SYSTEM FOR READING THE DOCUMENT |
FI113581B (en) | 1999-07-09 | 2004-05-14 | Nokia Corp | Process for manufacturing a waveguide in multi-layer ceramic structures and waveguides |
JP4341108B2 (en) | 1999-07-14 | 2009-10-07 | ソニー株式会社 | Virtual image observation optical device |
US20030063042A1 (en) | 1999-07-29 | 2003-04-03 | Asher A. Friesem | Electronic utility devices incorporating a compact virtual image display |
WO2001011895A1 (en) | 1999-08-04 | 2001-02-15 | Digilens, Inc. | Apparatus for producing a three-dimensional image |
GB2353144A (en) | 1999-08-11 | 2001-02-14 | Nokia Telecommunications Oy | Combline filter |
US6317528B1 (en) | 1999-08-23 | 2001-11-13 | Corning Incorporated | Temperature compensated integrated planar bragg grating, and method of formation |
US6646772B1 (en) | 1999-09-14 | 2003-11-11 | Digilens, Inc. | Holographic illumination system |
US6317228B2 (en) | 1999-09-14 | 2001-11-13 | Digilens, Inc. | Holographic illumination system |
US6538775B1 (en) | 1999-09-16 | 2003-03-25 | Reveo, Inc. | Holographically-formed polymer dispersed liquid crystals with multiple gratings |
JP2001093179A (en) | 1999-09-21 | 2001-04-06 | Pioneer Electronic Corp | Optical pickup |
US6222297B1 (en) | 1999-09-24 | 2001-04-24 | Litton Systems, Inc. | Pressed V-groove pancake slip ring |
JP2001091715A (en) | 1999-09-27 | 2001-04-06 | Nippon Mitsubishi Oil Corp | Composite diffraction device |
GB2354835A (en) | 1999-09-29 | 2001-04-04 | Marconi Electronic Syst Ltd | Head up displays |
US6323970B1 (en) | 1999-09-29 | 2001-11-27 | Digilents, Inc. | Method of producing switchable holograms |
US6741189B1 (en) | 1999-10-06 | 2004-05-25 | Microsoft Corporation | Keypad having optical waveguides |
US6301056B1 (en) | 1999-11-08 | 2001-10-09 | Corning Precision Lens | High speed retrofocus projection television lens systems |
US20020009299A1 (en) | 1999-12-04 | 2002-01-24 | Lenny Lipton | System for the display of stereoscopic photographs |
WO2001042828A1 (en) | 1999-12-07 | 2001-06-14 | Digilens Inc. | Holographic display system |
LT4842B (en) | 1999-12-10 | 2001-09-25 | Uab "Geola" | Universal digital holographic printer and method |
WO2001050200A2 (en) | 1999-12-22 | 2001-07-12 | Science Applications International Corp. | Switchable polymer-dispersed liquid crystal optical elements |
JP3611767B2 (en) | 1999-12-27 | 2005-01-19 | シャープ株式会社 | Photopolymerizable composition, photofunctional film using the composition, and method for producing the photofunctional film |
US6356172B1 (en) | 1999-12-29 | 2002-03-12 | Nokia Networks Oy | Resonator structure embedded in mechanical structure |
US7502003B2 (en) | 2000-01-20 | 2009-03-10 | Real D | Method for eliminating pi-cell artifacts |
US6519088B1 (en) | 2000-01-21 | 2003-02-11 | Stereographics Corporation | Method and apparatus for maximizing the viewing zone of a lenticular stereogram |
US6714329B2 (en) | 2000-01-21 | 2004-03-30 | Dai Nippon Printing Co., Ltd. | Hologram plate and its fabrication process |
JP4921634B2 (en) | 2000-01-31 | 2012-04-25 | グーグル インコーポレイテッド | Display device |
GB2372929B (en) | 2000-03-03 | 2003-03-12 | Tera View Ltd | Apparatus and method for investigating a sample |
US6987911B2 (en) | 2000-03-16 | 2006-01-17 | Lightsmyth Technologies, Inc. | Multimode planar waveguide spectral filter |
US6993223B2 (en) | 2000-03-16 | 2006-01-31 | Lightsmyth Technologies, Inc. | Multiple distributed optical structures in a single optical element |
US7245325B2 (en) | 2000-03-17 | 2007-07-17 | Fujifilm Corporation | Photographing device with light quantity adjustment |
US6919003B2 (en) | 2000-03-23 | 2005-07-19 | Canon Kabushiki Kaisha | Apparatus and process for producing electrophoretic device |
JP2001296503A (en) | 2000-04-13 | 2001-10-26 | Mitsubishi Heavy Ind Ltd | Device for reducing speckle |
EP1281022A1 (en) | 2000-05-04 | 2003-02-05 | Koninklijke Philips Electronics N.V. | Illumination unit for a device having a multi-color reflective liquid crystal display |
US6522795B1 (en) | 2000-05-17 | 2003-02-18 | Rebecca Jordan | Tunable etched grating for WDM optical communication systems |
US6730442B1 (en) | 2000-05-24 | 2004-05-04 | Science Applications International Corporation | System and method for replicating volume holograms |
JP4433355B2 (en) | 2000-05-25 | 2010-03-17 | 大日本印刷株式会社 | Production method of transmission hologram |
EP1316055A4 (en) | 2000-05-29 | 2006-10-04 | Vkb Inc | Virtual data entry device and method for input of alphanumeric and other data |
US20120105740A1 (en) | 2000-06-02 | 2012-05-03 | Oakley, Inc. | Eyewear with detachable adjustable electronics module |
JP2003536102A (en) | 2000-06-05 | 2003-12-02 | ラマス リミテッド | Optical beam expander guided by substrate |
US7671889B2 (en) | 2000-06-07 | 2010-03-02 | Real D | Autostereoscopic pixel arrangement techniques |
US20010050756A1 (en) | 2000-06-07 | 2001-12-13 | Lenny Lipton | Software generated color organ for stereoscopic and planar applications |
FI114585B (en) | 2000-06-09 | 2004-11-15 | Nokia Corp | Transfer cable in multilayer structures |
WO2001096494A1 (en) | 2000-06-09 | 2001-12-20 | Kent Displays, Inc. | Chiral additives for cholesteric displays |
US6598987B1 (en) | 2000-06-15 | 2003-07-29 | Nokia Mobile Phones Limited | Method and apparatus for distributing light to the user interface of an electronic device |
US20080024598A1 (en) | 2000-07-21 | 2008-01-31 | New York University | Autostereoscopic display |
US6359737B1 (en) | 2000-07-28 | 2002-03-19 | Generals Motors Corporation | Combined head-up display |
US20020021407A1 (en) | 2000-08-01 | 2002-02-21 | Scott Elliott | Eye-wear video game |
US7003187B2 (en) | 2000-08-07 | 2006-02-21 | Rosemount Inc. | Optical switch with moveable holographic optical element |
US7660024B2 (en) | 2000-08-07 | 2010-02-09 | Physical Optics Corporation | 3-D HLCD system and method of making |
US7376068B1 (en) | 2000-08-19 | 2008-05-20 | Jehad Khoury | Nano-scale resolution holographic lens and pickup device |
US7099080B2 (en) | 2000-08-30 | 2006-08-29 | Stereo Graphics Corporation | Autostereoscopic lenticular screen |
US6470132B1 (en) | 2000-09-05 | 2002-10-22 | Nokia Mobile Phones Ltd. | Optical hinge apparatus |
US6611253B1 (en) | 2000-09-19 | 2003-08-26 | Harel Cohen | Virtual input environment |
JP2002090858A (en) | 2000-09-20 | 2002-03-27 | Olympus Optical Co Ltd | In-finder display device |
US6583873B1 (en) | 2000-09-25 | 2003-06-24 | The Carnegie Institution Of Washington | Optical devices having a wavelength-tunable dispersion assembly that has a volume dispersive diffraction grating |
FI111457B (en) | 2000-10-02 | 2003-07-31 | Nokia Corp | Micromechanical structure |
US6750968B2 (en) | 2000-10-03 | 2004-06-15 | Accent Optical Technologies, Inc. | Differential numerical aperture methods and device |
DE60024684T2 (en) | 2000-10-06 | 2006-06-22 | Nokia Corp. | SELF-ORIENTAL TRANSITION BETWEEN A TRANSMISSION LINE AND A MODULE |
DE10051186B4 (en) | 2000-10-16 | 2005-04-07 | Fibermark Gessner Gmbh & Co. Ohg | Dust filter bag with highly porous carrier material layer |
JP2002122906A (en) | 2000-10-17 | 2002-04-26 | Olympus Optical Co Ltd | Display device within finder |
ATE264550T1 (en) | 2000-10-18 | 2004-04-15 | Nokia Corp | WAVE GUIDE TO STRIP GUIDE TRANSITION |
US6563648B2 (en) | 2000-10-20 | 2003-05-13 | Three-Five Systems, Inc. | Compact wide field of view imaging system |
US6738105B1 (en) | 2000-11-02 | 2004-05-18 | Intel Corporation | Coherent light despeckling |
US6791629B2 (en) | 2000-11-09 | 2004-09-14 | 3M Innovative Properties Company | Lens systems for projection televisions |
US6552789B1 (en) | 2000-11-22 | 2003-04-22 | Rockwell Collins, Inc. | Alignment detector |
US6822713B1 (en) | 2000-11-27 | 2004-11-23 | Kent State University | Optical compensation film for liquid crystal display |
JP4727034B2 (en) | 2000-11-28 | 2011-07-20 | オリンパス株式会社 | Observation optical system and imaging optical system |
GB0029340D0 (en) | 2000-11-30 | 2001-01-17 | Cambridge 3D Display Ltd | Flat panel camera |
CN1273856C (en) | 2000-12-14 | 2006-09-06 | 皇家菲利浦电子有限公司 | Liquid crystal display laminate and method of manufacturing such |
US20020093701A1 (en) | 2000-12-29 | 2002-07-18 | Xiaoxiao Zhang | Holographic multifocal lens |
US7042631B2 (en) | 2001-01-04 | 2006-05-09 | Coherent Technologies, Inc. | Power scalable optical systems for generating, transporting, and delivering high power, high quality, laser beams |
US20020120916A1 (en) | 2001-01-16 | 2002-08-29 | Snider Albert Monroe | Head-up display system utilizing fluorescent material |
US6563650B2 (en) | 2001-01-17 | 2003-05-13 | 3M Innovative Properties Company | Compact, telecentric projection lenses for use with pixelized panels |
EP2336825B1 (en) | 2001-02-09 | 2014-05-07 | Dai Nippon Printing Co., Ltd. | Photosensitive composition for volume hologram recording and photosensitive medium for volume hologram recording |
US6518747B2 (en) | 2001-02-16 | 2003-02-11 | Quantum Design, Inc. | Method and apparatus for quantitative determination of accumulations of magnetic particles |
US6625381B2 (en) | 2001-02-20 | 2003-09-23 | Eastman Kodak Company | Speckle suppressed laser projection system with partial beam reflection |
US6600590B2 (en) | 2001-02-20 | 2003-07-29 | Eastman Kodak Company | Speckle suppressed laser projection system using RF injection |
US6476974B1 (en) | 2001-02-28 | 2002-11-05 | Corning Precision Lens Incorporated | Projection lenses for use with reflective pixelized panels |
WO2002071104A2 (en) | 2001-03-02 | 2002-09-12 | Innovative Solutions & Support, Inc. | Image display generator for a head-up display |
JP2002258089A (en) | 2001-03-02 | 2002-09-11 | Hitachi Ltd | Method of manufacturing optical waveguide and manufacturing device |
JP2002277732A (en) | 2001-03-14 | 2002-09-25 | Fuji Photo Optical Co Ltd | Diffraction type optical pickup lens and optical pickup device using the same |
JP2002277816A (en) | 2001-03-21 | 2002-09-25 | Minolta Co Ltd | Image display device |
US7184002B2 (en) | 2001-03-29 | 2007-02-27 | Stereographics Corporation | Above-and-below stereoscopic format with signifier |
GB0108838D0 (en) | 2001-04-07 | 2001-05-30 | Cambridge 3D Display Ltd | Far field display |
US6781701B1 (en) | 2001-04-10 | 2004-08-24 | Intel Corporation | Method and apparatus for measuring optical phase and amplitude |
FI20010778A (en) | 2001-04-12 | 2002-10-13 | Nokia Corp | Optical switching arrangement |
CA2443129A1 (en) | 2001-04-12 | 2002-10-24 | Emilia Anderson | High index-contrast fiber waveguides and applications |
JP4772204B2 (en) | 2001-04-13 | 2011-09-14 | オリンパス株式会社 | Observation optical system |
US6844980B2 (en) | 2001-04-23 | 2005-01-18 | Reveo, Inc. | Image display system and electrically actuatable image combiner therefor |
FI20010917A (en) | 2001-05-03 | 2002-11-04 | Nokia Corp | Electrically reconfigurable optical devices and methods for their formation |
FI111357B (en) | 2001-05-03 | 2003-07-15 | Nokia Corp | Electrically controllable sheet of varying thickness and method for its formation |
WO2002093204A2 (en) | 2001-05-17 | 2002-11-21 | Optronx, Inc. | Electronic semiconductor control of light in optical waveguide |
US6731434B1 (en) | 2001-05-23 | 2004-05-04 | University Of Central Florida | Compact lens assembly for the teleportal augmented reality system |
US6999239B1 (en) | 2001-05-23 | 2006-02-14 | Research Foundation Of The University Of Central Florida, Inc | Head-mounted display by integration of phase-conjugate material |
US7009773B2 (en) | 2001-05-23 | 2006-03-07 | Research Foundation Of The University Of Central Florida, Inc. | Compact microlenslet arrays imager |
US6963454B1 (en) | 2002-03-01 | 2005-11-08 | Research Foundation Of The University Of Central Florida | Head-mounted display by integration of phase-conjugate material |
JP4414612B2 (en) | 2001-05-31 | 2010-02-10 | 矢崎総業株式会社 | Vehicle display device |
US7002618B2 (en) | 2001-06-01 | 2006-02-21 | Stereographics Corporation | Plano-stereoscopic DVD movie |
US7500104B2 (en) | 2001-06-15 | 2009-03-03 | Microsoft Corporation | Networked device branding for secure interaction in trust webs on open networks |
US6747781B2 (en) | 2001-06-25 | 2004-06-08 | Silicon Light Machines, Inc. | Method, apparatus, and diffuser for reducing laser speckle |
US7151246B2 (en) | 2001-07-06 | 2006-12-19 | Palantyr Research, Llc | Imaging system and methodology |
US6750995B2 (en) | 2001-07-09 | 2004-06-15 | Dickson Leroy David | Enhanced volume phase grating with high dispersion, high diffraction efficiency and low polarization sensitivity |
JP2003114347A (en) | 2001-07-30 | 2003-04-18 | Furukawa Electric Co Ltd:The | Single mode optical fiber, method and device for manufacturing the same |
GB0118866D0 (en) | 2001-08-02 | 2001-09-26 | Cambridge 3D Display Ltd | Shaped taper flat panel display |
WO2003011939A1 (en) | 2001-08-03 | 2003-02-13 | Dsm N.V. | Curable compositions for display devices |
US6791739B2 (en) | 2001-08-08 | 2004-09-14 | Eastman Kodak Company | Electro-optic despeckling modulator and method of use |
US6927694B1 (en) | 2001-08-20 | 2005-08-09 | Research Foundation Of The University Of Central Florida | Algorithm for monitoring head/eye motion for driver alertness with one camera |
JP2003066428A (en) | 2001-08-23 | 2003-03-05 | Toppan Printing Co Ltd | Projector using holographic polymer dispersed liquid crystal |
US6987908B2 (en) | 2001-08-24 | 2006-01-17 | T-Networks, Inc. | Grating dispersion compensator and method of manufacture |
JP4155771B2 (en) | 2001-08-27 | 2008-09-24 | 大日本印刷株式会社 | Photosensitive composition for volume hologram recording and photosensitive medium for volume hologram recording using the same |
US6594090B2 (en) | 2001-08-27 | 2003-07-15 | Eastman Kodak Company | Laser projection display system |
US6646810B2 (en) | 2001-09-04 | 2003-11-11 | Delphi Technologies, Inc. | Display backlighting apparatus |
US7447967B2 (en) | 2001-09-13 | 2008-11-04 | Texas Instruments Incorporated | MIMO hybrid-ARQ using basis hopping |
IL160902A0 (en) | 2001-09-25 | 2004-08-31 | Cambridge Flat Projection | Flat-panel projection display |
JP2005504413A (en) | 2001-09-26 | 2005-02-10 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Waveguide, edge illumination illumination device and display device having such a waveguide or device |
US6833955B2 (en) | 2001-10-09 | 2004-12-21 | Planop Planar Optics Ltd. | Compact two-plane optical device |
KR100416548B1 (en) | 2001-10-10 | 2004-02-05 | 삼성전자주식회사 | Three dimensional image displaying apparatus |
JP2003139958A (en) | 2001-10-31 | 2003-05-14 | Sony Corp | Transmission type laminated hologram optical element, image display element and image display device |
US6816309B2 (en) | 2001-11-30 | 2004-11-09 | Colorlink, Inc. | Compensated color management systems and methods |
US6806982B2 (en) | 2001-11-30 | 2004-10-19 | Zebra Imaging, Inc. | Pulsed-laser systems and methods for producing holographic stereograms |
US6773114B2 (en) | 2001-12-07 | 2004-08-10 | Nokia Corporation | Portable multimode display device |
KR20040070214A (en) | 2001-12-13 | 2004-08-06 | 소니 인터내셔널(유로파) 게엠베하 | A method of forming a composite |
US7903228B2 (en) | 2002-01-10 | 2011-03-08 | Kent State University | Material for liquid crystal cell |
US6577429B1 (en) | 2002-01-15 | 2003-06-10 | Eastman Kodak Company | Laser projection display system |
US6972788B1 (en) | 2002-01-28 | 2005-12-06 | Rockwell Collins | Projection display for a aircraft cockpit environment |
US6926429B2 (en) | 2002-01-30 | 2005-08-09 | Delphi Technologies, Inc. | Eye tracking/HUD system |
US6952435B2 (en) | 2002-02-11 | 2005-10-04 | Ming Lai | Speckle free laser probe beam |
AU2003208584A1 (en) | 2002-02-15 | 2003-09-04 | Elop Electro-Optics Industries Ltd. | Device and method for varying the reflectance or transmittance of light |
AU2003217546A1 (en) | 2002-02-19 | 2003-09-09 | Photon-X, Inc. | Polymer nanocomposites for optical applications |
US6836369B2 (en) | 2002-03-08 | 2004-12-28 | Denso Corporation | Head-up display |
US7528385B2 (en) | 2002-03-15 | 2009-05-05 | Pd-Ld, Inc. | Fiber optic devices having volume Bragg grating elements |
DE60311904D1 (en) | 2002-03-15 | 2007-04-05 | Computer Sciences Corp | Methods and apparatus for analyzing writing in documents |
US7027671B2 (en) | 2002-03-18 | 2006-04-11 | Koninklijke Philips Electronics N.V. | Polarized-light-emitting waveguide, illumination arrangement and display device comprising such |
JP2003270419A (en) | 2002-03-18 | 2003-09-25 | Sony Corp | Diffractive optical element and image display device |
EP1347641A1 (en) | 2002-03-19 | 2003-09-24 | Siemens Aktiengesellschaft | Free projection display device |
IL148804A (en) | 2002-03-21 | 2007-02-11 | Yaacov Amitai | Optical device |
CN1678948A (en) | 2002-03-27 | 2005-10-05 | 艾利丹尼森公司 | Switchable electro-optical laminates |
DE10216279A1 (en) | 2002-04-12 | 2003-10-30 | Siemens Ag | Method for the detection of a control signal in an optical transmission system |
DE10312405B4 (en) | 2002-04-16 | 2011-12-01 | Merck Patent Gmbh | Liquid crystalline medium with high birefringence and light stability and its use |
US6757105B2 (en) | 2002-04-25 | 2004-06-29 | Planop Planar Optics Ltd. | Optical device having a wide field-of-view for multicolor images |
JP3460716B1 (en) | 2002-04-25 | 2003-10-27 | ソニー株式会社 | Image display device |
FI113719B (en) | 2002-04-26 | 2004-05-31 | Nokia Corp | modulator |
KR20030088217A (en) | 2002-05-13 | 2003-11-19 | 삼성전자주식회사 | Wearable display system enabling adjustment of magnfication |
US20030228019A1 (en) | 2002-06-11 | 2003-12-11 | Elbit Systems Ltd. | Method and system for reducing noise |
EP1372036A1 (en) | 2002-06-12 | 2003-12-17 | ASML Netherlands B.V. | Lithographic apparatus and device manufacturing method |
US7375870B2 (en) | 2002-06-13 | 2008-05-20 | Nokia Corporation | Enhancement electrode configuration for electrically controlled light modulators |
US7804995B2 (en) | 2002-07-02 | 2010-09-28 | Reald Inc. | Stereoscopic format converter |
ATE354623T1 (en) | 2002-07-06 | 2007-03-15 | Merck Patent Gmbh | LIQUID CRYSTALLINE MEDIUM |
JP3958134B2 (en) | 2002-07-12 | 2007-08-15 | キヤノン株式会社 | measuring device |
ITTO20020625A1 (en) | 2002-07-17 | 2004-01-19 | Fiat Ricerche | LIGHT GUIDE FOR "HEAD-MOUNTED" OR "HEAD-UP" TYPE DISPLAY DEVICES |
JP3867634B2 (en) | 2002-07-26 | 2007-01-10 | 株式会社ニコン | Image combiner and image display device |
US6951393B2 (en) | 2002-07-31 | 2005-10-04 | Canon Kabushiki Kaisha | Projection type image display apparatus and image display system |
ATE386951T1 (en) | 2002-08-05 | 2008-03-15 | Elbit Systems Ltd | NIGHT VISION IMAGING SYSTEM AND METHOD FOR MOUNTING IN A VEHICLE |
US7872804B2 (en) | 2002-08-20 | 2011-01-18 | Illumina, Inc. | Encoded particle having a grating with variations in the refractive index |
US8538208B2 (en) | 2002-08-28 | 2013-09-17 | Seng-Tiong Ho | Apparatus for coupling light between input and output waveguides |
US7619739B1 (en) | 2002-08-29 | 2009-11-17 | Science Applications International Corporation | Detection and identification of biological agents using Bragg filters |
US7259906B1 (en) | 2002-09-03 | 2007-08-21 | Cheetah Omni, Llc | System and method for voice control of medical devices |
TWI275827B (en) | 2002-09-03 | 2007-03-11 | Optrex Kk | Image display system |
AU2003268487A1 (en) | 2002-09-05 | 2004-03-29 | Nanosys, Inc. | Nanocomposites |
FI114945B (en) | 2002-09-19 | 2005-01-31 | Nokia Corp | Electrically adjustable diffractive gate element |
EP1543364B1 (en) | 2002-09-25 | 2012-05-23 | Hoya Corporation Usa | Method for making an optical apparatus for free-space optical propagation between waveguide(s) and/or fiber(s) |
US6776339B2 (en) | 2002-09-27 | 2004-08-17 | Nokia Corporation | Wireless communication device providing a contactless interface for a smart card reader |
US9134585B2 (en) | 2002-09-30 | 2015-09-15 | Gentex Corporation | Automotive rearview mirror with capacitive switches |
US6805490B2 (en) | 2002-09-30 | 2004-10-19 | Nokia Corporation | Method and system for beam expansion in a display device |
ATE412223T1 (en) | 2002-10-24 | 2008-11-15 | L 1 Identity Solutions Ag | CHECKING IMAGE RECORDS OF PERSONS |
JP4242138B2 (en) | 2002-11-05 | 2009-03-18 | 日本電信電話株式会社 | Hologram drawing method and hologram |
US7095026B2 (en) | 2002-11-08 | 2006-08-22 | L-3 Communications Cincinnati Electronics Corporation | Methods and apparatuses for selectively limiting undesired radiation |
US8786923B2 (en) | 2002-11-22 | 2014-07-22 | Akonia Holographics, Llc | Methods and systems for recording to holographic storage media |
US20040263969A1 (en) | 2002-11-25 | 2004-12-30 | Lenny Lipton | Lenticular antireflection display |
US7018563B1 (en) | 2002-11-26 | 2006-03-28 | Science Applications International Corporation | Tailoring material composition for optimization of application-specific switchable holograms |
US6853491B1 (en) | 2003-11-26 | 2005-02-08 | Frank Ruhle | Collimating optical member for real world simulation |
WO2004049319A1 (en) | 2002-11-27 | 2004-06-10 | Nokia Corporation | Read/write device for optical memory and method therefore |
US20040112862A1 (en) | 2002-12-12 | 2004-06-17 | Molecular Imprints, Inc. | Planarization composition and method of patterning a substrate using the same |
CN100337417C (en) | 2002-12-13 | 2007-09-12 | 北京工业大学 | Stage linked body holographic grating intensive WDM implement manufacture and system thereof |
FI114946B (en) | 2002-12-16 | 2005-01-31 | Nokia Corp | Diffractive grating element for balancing diffraction efficiency |
US7002407B2 (en) | 2002-12-18 | 2006-02-21 | Powerwave Technologies, Inc. | Delay mismatched feed forward amplifier system using penalties and floors for control |
US7046888B2 (en) | 2002-12-18 | 2006-05-16 | The Regents Of The University Of Michigan | Enhancing fiber-optic sensing technique using a dual-core fiber |
GB2396484A (en) | 2002-12-19 | 2004-06-23 | Nokia Corp | Reducing coupling between different antennas |
US6952312B2 (en) | 2002-12-31 | 2005-10-04 | 3M Innovative Properties Company | Head-up display with polarized light source and wide-angle p-polarization reflective polarizer |
US6853493B2 (en) | 2003-01-07 | 2005-02-08 | 3M Innovative Properties Company | Folded, telecentric projection lenses for use with pixelized panels |
JP3873892B2 (en) | 2003-01-22 | 2007-01-31 | コニカミノルタホールディングス株式会社 | Video display device |
US7268946B2 (en) | 2003-02-10 | 2007-09-11 | Jian Wang | Universal broadband polarizer, devices incorporating same, and method of making same |
US20040263971A1 (en) | 2003-02-12 | 2004-12-30 | Lenny Lipton | Dual mode autosteroscopic lens sheet |
US7088515B2 (en) | 2003-02-12 | 2006-08-08 | Stereographics Corporation | Autostereoscopic lens sheet with planar areas |
US7205960B2 (en) | 2003-02-19 | 2007-04-17 | Mirage Innovations Ltd. | Chromatic planar optic display system |
US7119965B1 (en) | 2003-02-24 | 2006-10-10 | University Of Central Florida Research Foundation, Inc. | Head mounted projection display with a wide field of view |
US8230359B2 (en) | 2003-02-25 | 2012-07-24 | Microsoft Corporation | System and method that facilitates computer desktop use via scaling of displayed objects with shifts to the periphery |
CN100383598C (en) | 2003-03-05 | 2008-04-23 | 3M创新有限公司 | Diffractive lens |
US7092133B2 (en) | 2003-03-10 | 2006-08-15 | Inphase Technologies, Inc. | Polytopic multiplex holography |
US20040179764A1 (en) | 2003-03-14 | 2004-09-16 | Noureddine Melikechi | Interferometric analog optical modulator for single mode fibers |
KR20060015476A (en) | 2003-03-16 | 2006-02-17 | 익스플레이 엘티디. | Projection system and method |
US7006732B2 (en) | 2003-03-21 | 2006-02-28 | Luxtera, Inc. | Polarization splitting grating couplers |
CN100507623C (en) | 2003-03-25 | 2009-07-01 | 富士胶片株式会社 | Core regulating method of synthetic laser and laser synthetic light source |
US7460696B2 (en) | 2004-06-01 | 2008-12-02 | Lumidigm, Inc. | Multispectral imaging biometrics |
US7539330B2 (en) | 2004-06-01 | 2009-05-26 | Lumidigm, Inc. | Multispectral liveness determination |
US6950173B1 (en) | 2003-04-08 | 2005-09-27 | Science Applications International Corporation | Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements |
AU2003901797A0 (en) | 2003-04-14 | 2003-05-01 | Agresearch Limited | Manipulation of condensed tannin biosynthesis |
US6985296B2 (en) | 2003-04-15 | 2006-01-10 | Stereographics Corporation | Neutralizing device for autostereoscopic lens sheet |
US20070041684A1 (en) | 2003-05-09 | 2007-02-22 | Sbg Labs Inc. A Delaware Corporation | Switchable viewfinder display |
ATE447205T1 (en) | 2003-05-12 | 2009-11-15 | Elbit Systems Ltd | METHOD AND SYSTEM FOR AUDIOVISUAL COMMUNICATION |
FI115169B (en) | 2003-05-13 | 2005-03-15 | Nokia Corp | Method and optical system for coupling light to a waveguide |
US7401920B1 (en) | 2003-05-20 | 2008-07-22 | Elbit Systems Ltd. | Head mounted eye tracking and display system |
US7046439B2 (en) | 2003-05-22 | 2006-05-16 | Eastman Kodak Company | Optical element with nanoparticles |
GB0313044D0 (en) | 2003-06-06 | 2003-07-09 | Cambridge Flat Projection | Flat panel scanning illuminator |
WO2004109349A2 (en) | 2003-06-10 | 2004-12-16 | Elop Electro-Optics Industries Ltd. | Method and system for displaying an informative image against a background image |
JP2005011387A (en) | 2003-06-16 | 2005-01-13 | Hitachi Global Storage Technologies Inc | Magnetic disk unit |
DE602004030335D1 (en) | 2003-06-19 | 2011-01-13 | Nippon Kogaku Kk | OPTICAL ELEMENT |
WO2005001753A1 (en) | 2003-06-21 | 2005-01-06 | Aprilis, Inc. | Acquisition of high resolution boimetric images |
US7394865B2 (en) | 2003-06-25 | 2008-07-01 | Nokia Corporation | Signal constellations for multi-carrier systems |
CA2530987C (en) | 2003-07-03 | 2012-04-17 | Holotouch, Inc. | Holographic human-machine interfaces |
ITTO20030530A1 (en) | 2003-07-09 | 2005-01-10 | Infm Istituto Naz Per La Fisi Ca Della Mater | HOLOGRAPHIC DISTRIBUTION NETWORK, PROCEDURE FOR THE |
GB2403814A (en) | 2003-07-10 | 2005-01-12 | Ocuity Ltd | Directional display apparatus with birefringent lens structure |
US7158095B2 (en) | 2003-07-17 | 2007-01-02 | Big Buddy Performance, Inc. | Visual display system for displaying virtual images onto a field of vision |
WO2005015298A1 (en) | 2003-08-08 | 2005-02-17 | Merck Patent Gmbh | Alignment layer with reactive mesogens for aligning liquid crystal molecules |
KR100516601B1 (en) | 2003-08-13 | 2005-09-22 | 삼성전기주식회사 | Lens system being constructed in mobile terminal |
EP1510862A3 (en) | 2003-08-25 | 2006-08-09 | Fuji Photo Film Co., Ltd. | Hologram recording method and hologram recording material |
WO2005022246A1 (en) | 2003-08-29 | 2005-03-10 | Nokia Corporation | Electrical device utilizing charge recycling within a cell |
GB2405519A (en) | 2003-08-30 | 2005-03-02 | Sharp Kk | A multiple-view directional display |
IL157837A (en) | 2003-09-10 | 2012-12-31 | Yaakov Amitai | Substrate-guided optical device particularly for three-dimensional displays |
IL157838A (en) | 2003-09-10 | 2013-05-30 | Yaakov Amitai | High brightness optical device |
IL157836A (en) | 2003-09-10 | 2009-08-03 | Yaakov Amitai | Optical devices particularly for remote viewing applications |
US7212175B1 (en) | 2003-09-19 | 2007-05-01 | Rockwell Collins, Inc. | Symbol position monitoring for pixelated heads-up display method and apparatus |
US7088457B1 (en) | 2003-10-01 | 2006-08-08 | University Of Central Florida Research Foundation, Inc. | Iterative least-squares wavefront estimation for general pupil shapes |
US7616227B2 (en) | 2003-10-02 | 2009-11-10 | Real D | Hardware based interdigitation |
US7616228B2 (en) | 2003-10-02 | 2009-11-10 | Real D | Hardware based interdigitation |
JP4266770B2 (en) | 2003-10-22 | 2009-05-20 | アルプス電気株式会社 | Optical image reader |
AU2003290622A1 (en) | 2003-11-04 | 2004-06-06 | Inphase Technologies, Inc. | System and method for bitwise readout holographic rom |
US7277640B2 (en) | 2003-11-18 | 2007-10-02 | Avago Technologies Fiber Ip (Singapore) Pte Ltd | Optical add/drop multiplexing systems |
US7333685B2 (en) | 2003-11-24 | 2008-02-19 | Avago Technologies Fiber Ip (Singapore) Pte. Ltd. | Variable optical attenuator systems |
WO2005052660A1 (en) | 2003-11-28 | 2005-06-09 | Nhk Spring Co., Ltd. | Multi-channel array waveguide diffraction grating type multiplexer/demultiplexer and method of connecting array waveguide with output waveguides |
IL165376A0 (en) | 2003-12-02 | 2006-01-15 | Electro Optics Ind Ltd | Vehicle display system |
JP2005190647A (en) | 2003-12-03 | 2005-07-14 | Ricoh Co Ltd | Phase-change optical recording medium |
US7034748B2 (en) | 2003-12-17 | 2006-04-25 | Microsoft Corporation | Low-cost, steerable, phased array antenna with controllable high permittivity phase shifters |
US7273659B2 (en) | 2003-12-18 | 2007-09-25 | Lintec Corporation | Photochromic film material |
US7557154B2 (en) | 2004-12-23 | 2009-07-07 | Sabic Innovative Plastics Ip B.V. | Polymer compositions, method of manufacture, and articles formed therefrom |
US7496293B2 (en) | 2004-01-14 | 2009-02-24 | Elbit Systems Ltd. | Versatile camera for various visibility conditions |
JP4077484B2 (en) | 2004-01-29 | 2008-04-16 | 松下電器産業株式会社 | Light source device |
JP4682519B2 (en) | 2004-02-03 | 2011-05-11 | セイコーエプソン株式会社 | Display device |
JP4438436B2 (en) | 2004-02-03 | 2010-03-24 | セイコーエプソン株式会社 | Display device |
FI20040162A0 (en) | 2004-02-03 | 2004-02-03 | Nokia Oyj | Stabilization of reference oscillator frequency |
US7317449B2 (en) | 2004-03-02 | 2008-01-08 | Microsoft Corporation | Key-based advanced navigation techniques |
US6958868B1 (en) | 2004-03-29 | 2005-10-25 | John George Pender | Motion-free tracking solar concentrator |
CN101174028B (en) | 2004-03-29 | 2015-05-20 | 索尼株式会社 | Optical device and virtual image display device |
US7119161B2 (en) | 2004-03-31 | 2006-10-10 | Solaris Nanosciences, Inc. | Anisotropic nanoparticles and anisotropic nanostructures and pixels, displays and inks using them |
US20050232530A1 (en) | 2004-04-01 | 2005-10-20 | Jason Kekas | Electronically controlled volume phase grating devices, systems and fabrication methods |
JP3952034B2 (en) | 2004-04-14 | 2007-08-01 | 富士ゼロックス株式会社 | Hologram recording method, hologram recording apparatus, hologram reproducing method, hologram reproducing apparatus, and information holding body |
US7526103B2 (en) | 2004-04-15 | 2009-04-28 | Donnelly Corporation | Imaging system for vehicle |
US7375886B2 (en) | 2004-04-19 | 2008-05-20 | Stereographics Corporation | Method and apparatus for optimizing the viewing distance of a lenticular stereogram |
US6992830B1 (en) | 2004-04-22 | 2006-01-31 | Raytheon Company | Projection display having an angle-selective coating for enhanced image contrast, and method for enhancing image contrast |
WO2005103771A1 (en) | 2004-04-23 | 2005-11-03 | Parriaux Olivier M | High efficiency optical diffraction device |
US7339737B2 (en) | 2004-04-23 | 2008-03-04 | Microvision, Inc. | Beam multiplier that can be used as an exit-pupil expander and related system and method |
JP4373286B2 (en) | 2004-05-06 | 2009-11-25 | オリンパス株式会社 | Head-mounted display device |
GB2414127A (en) | 2004-05-12 | 2005-11-16 | Sharp Kk | Time sequential colour projection |
WO2005111669A1 (en) | 2004-05-17 | 2005-11-24 | Nikon Corporation | Optical element, combiner optical system, and image display unit |
US7301601B2 (en) | 2004-05-20 | 2007-11-27 | Alps Electric (Usa) Inc. | Optical switching device using holographic polymer dispersed liquid crystals |
JP2005331757A (en) | 2004-05-20 | 2005-12-02 | Ricoh Co Ltd | Polarization selective hologram element and optical pickup device |
US7639208B1 (en) | 2004-05-21 | 2009-12-29 | University Of Central Florida Research Foundation, Inc. | Compact optical see-through head-mounted display with occlusion support |
US8229185B2 (en) | 2004-06-01 | 2012-07-24 | Lumidigm, Inc. | Hygienic biometric sensors |
US7002753B2 (en) | 2004-06-02 | 2006-02-21 | 3M Innovative Properties Company | Color-corrected projection lenses for use with pixelized panels |
IL162573A (en) | 2004-06-17 | 2013-05-30 | Lumus Ltd | Substrate-guided optical device with very wide aperture |
IL162572A (en) | 2004-06-17 | 2013-02-28 | Lumus Ltd | High brightness optical device |
US7482996B2 (en) | 2004-06-28 | 2009-01-27 | Honeywell International Inc. | Head-up display |
IL162779A (en) | 2004-06-29 | 2010-11-30 | Elbit Systems Ltd | Security systems and methods relating to travelling vehicles |
EP1612596A1 (en) | 2004-06-29 | 2006-01-04 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | High-efficient, tuneable and switchable optical elements based on polymer-liquid crystal composites and films, mixtures and a method for their production |
JP2006018864A (en) | 2004-06-30 | 2006-01-19 | Sony Corp | Hologram duplication method |
US7617022B1 (en) | 2004-07-01 | 2009-11-10 | Rockwell Collins, Inc. | Dual wavelength enhanced vision system optimized for visual landing light alignment |
US7605774B1 (en) | 2004-07-02 | 2009-10-20 | Rockwell Collins, Inc. | Enhanced vision system (EVS) processing window tied to flight path |
US20060013977A1 (en) | 2004-07-13 | 2006-01-19 | Duke Leslie P | Polymeric ballistic material and method of making |
US7597447B2 (en) | 2004-07-14 | 2009-10-06 | Honeywell International Inc. | Color correcting contrast enhancement of displays |
US7285903B2 (en) | 2004-07-15 | 2007-10-23 | Honeywell International, Inc. | Display with bright backlight |
US7110184B1 (en) | 2004-07-19 | 2006-09-19 | Elbit Systems Ltd. | Method and apparatus for combining an induced image with a scene image |
JP4835437B2 (en) | 2004-07-20 | 2011-12-14 | 旭硝子株式会社 | Liquid crystal lens element and optical head device |
JP4841815B2 (en) | 2004-07-23 | 2011-12-21 | 株式会社村上開明堂 | Display device |
US7492512B2 (en) | 2004-07-23 | 2009-02-17 | Mirage International Ltd. | Wide field-of-view binocular device, system and kit |
US7689086B2 (en) | 2004-07-30 | 2010-03-30 | University Of Connecticut | Resonant leaky-mode optical devices and associated methods |
US8938141B2 (en) | 2004-07-30 | 2015-01-20 | University Of Connecticut | Tunable resonant leaky-mode N/MEMS elements and uses in optical devices |
US7145729B2 (en) | 2004-08-04 | 2006-12-05 | 3M Innovative Properties Company | Foldable projection lenses |
US7230770B2 (en) | 2004-08-04 | 2007-06-12 | 3M Innovative Properties Company | Projection lenses having color-correcting rear lens units |
IL163361A (en) | 2004-08-05 | 2011-06-30 | Lumus Ltd | Optical device for light coupling into a guiding substrate |
JP2008509438A (en) | 2004-08-06 | 2008-03-27 | ユニヴァーシティ オブ ワシントン | Optical display device scanned with variable fixed viewing distance |
US7436568B1 (en) | 2004-08-17 | 2008-10-14 | Kuykendall Jr Jacob L | Head mountable video display |
US7233446B2 (en) | 2004-08-19 | 2007-06-19 | 3Dtl, Inc. | Transformable, applicable material and methods for using same for optical effects |
US7075273B2 (en) | 2004-08-24 | 2006-07-11 | Motorola, Inc. | Automotive electrical system configuration using a two bus structure |
US8124929B2 (en) | 2004-08-25 | 2012-02-28 | Protarius Filo Ag, L.L.C. | Imager module optical focus and assembly method |
JP2006318515A (en) | 2004-09-10 | 2006-11-24 | Ricoh Co Ltd | Hologram element, production method thereof and optical header |
US7619825B1 (en) | 2004-09-27 | 2009-11-17 | Rockwell Collins, Inc. | Compact head up display with wide viewing angle |
WO2006035737A1 (en) | 2004-09-29 | 2006-04-06 | Brother Kogyo Kabushiki Kaisha | Retina scanning type display |
JP4649158B2 (en) | 2004-09-30 | 2011-03-09 | 富士フイルム株式会社 | Hologram recording method |
JP4340690B2 (en) | 2004-10-08 | 2009-10-07 | パイオニア株式会社 | Diffractive optical element, objective lens module, optical pickup and optical information recording / reproducing apparatus |
WO2006041278A1 (en) | 2004-10-15 | 2006-04-20 | Stichting Dutch Polymer Institute | Waveguide comprising an anisotropic diffracting layer |
EP1810221B1 (en) | 2004-10-16 | 2014-06-25 | Identix Incorporated | Diffractive imaging system for acquiring an image of skin topology and corresponding method |
JP4692489B2 (en) | 2004-10-19 | 2011-06-01 | 旭硝子株式会社 | Liquid crystal diffractive lens element and optical head device |
US7376307B2 (en) | 2004-10-29 | 2008-05-20 | Matsushita Electric Industrial Co., Ltd | Multimode long period fiber bragg grating machined by ultrafast laser direct writing |
IL165190A (en) | 2004-11-14 | 2012-05-31 | Elbit Systems Ltd | System and method for stabilizing an image |
EP1817643A1 (en) | 2004-11-25 | 2007-08-15 | Koninklijke Philips Electronics N.V. | Dynamic liquid crystal gel holograms |
WO2006061927A1 (en) | 2004-12-06 | 2006-06-15 | Nikon Corporation | Image display optical system, image display unit, lighting optical system, and liquid crystral display unit |
EP1825306B1 (en) | 2004-12-13 | 2012-04-04 | Nokia Corporation | System and method for beam expansion with near focus in a display device |
WO2006064334A1 (en) | 2004-12-13 | 2006-06-22 | Nokia Corporation | General diffractive optics method for expanding an exit pupil |
US7206107B2 (en) | 2004-12-13 | 2007-04-17 | Nokia Corporation | Method and system for beam expansion in a display device |
US20060126181A1 (en) | 2004-12-13 | 2006-06-15 | Nokia Corporation | Method and system for beam expansion in a display device |
US7466994B2 (en) | 2004-12-31 | 2008-12-16 | Nokia Corporation | Sub-display of a mobile device |
US7289069B2 (en) | 2005-01-04 | 2007-10-30 | Nokia Corporation | Wireless device antenna |
WO2006077588A2 (en) | 2005-01-20 | 2006-07-27 | Elbit Systems Electro-Optics Elop Ltd. | Laser obstacle detection and display |
US8885139B2 (en) | 2005-01-21 | 2014-11-11 | Johnson & Johnson Vision Care | Adaptive electro-active lens with variable focal length |
AU2006208719B2 (en) | 2005-01-26 | 2009-05-28 | Xieon Networks S.A.R.L. | Method for optically transmitting polarisation multiplex signals |
WO2007097738A2 (en) | 2005-01-26 | 2007-08-30 | Wollf Robin Q | Eye tracker/head tracker/camera tracker controlled camera/weapon positioner control system |
GB0502453D0 (en) | 2005-02-05 | 2005-03-16 | Cambridge Flat Projection | Flat panel lens |
IL166799A (en) | 2005-02-10 | 2014-09-30 | Lumus Ltd | Substrate-guided optical device utilizing beam splitters |
US7724443B2 (en) | 2005-02-10 | 2010-05-25 | Lumus Ltd. | Substrate-guided optical device utilizing thin transparent layer |
US10073264B2 (en) | 2007-08-03 | 2018-09-11 | Lumus Ltd. | Substrate-guide optical device |
US7751122B2 (en) | 2005-02-10 | 2010-07-06 | Lumus Ltd. | Substrate-guided optical device particularly for vision enhanced optical systems |
US7325928B2 (en) | 2005-02-14 | 2008-02-05 | Intel Corporation | Resolution multiplication technique for projection display systems |
GB2423517A (en) | 2005-02-28 | 2006-08-30 | Weatherford Lamb | Apparatus for drawing and annealing an optical fibre |
JPWO2006098334A1 (en) | 2005-03-15 | 2008-08-21 | 富士フイルム株式会社 | Translucent electromagnetic shielding film, optical filter, and plasma television |
WO2006102073A2 (en) | 2005-03-18 | 2006-09-28 | Sbg Labs, Inc. | Spatial light modulator |
CN101147094A (en) | 2005-03-22 | 2008-03-19 | 美宇公司 | Optical system using total internal reflection images |
US7587110B2 (en) | 2005-03-22 | 2009-09-08 | Panasonic Corporation | Multicore optical fiber with integral diffractive elements machined by ultrafast laser direct writing |
JP4612853B2 (en) | 2005-03-29 | 2011-01-12 | キヤノン株式会社 | Pointed position recognition device and information input device having the same |
US7573640B2 (en) | 2005-04-04 | 2009-08-11 | Mirage Innovations Ltd. | Multi-plane optical apparatus |
JP5090337B2 (en) | 2005-04-08 | 2012-12-05 | リアルディー インコーポレイテッド | Autostereoscopic display with planar pass-through |
US7123421B1 (en) | 2005-04-22 | 2006-10-17 | Panavision International, L.P. | Compact high performance zoom lens system |
IL168581A (en) | 2005-05-15 | 2010-12-30 | Elbit Systems Electro Optics Elop Ltd | Head-up display system |
EP2501139A3 (en) | 2005-05-26 | 2014-01-08 | RealD Inc. | Ghost-compensation for improved stereoscopic projection |
AU2006253723A1 (en) | 2005-05-30 | 2006-12-07 | Elbit Systems Ltd. | Combined head up display |
EP1938152B1 (en) | 2005-06-03 | 2012-08-15 | Nokia Corporation | General diffractive optics method for expanding an exit pupil |
WO2006133224A2 (en) | 2005-06-07 | 2006-12-14 | Real D | Controlling the angular extent of autostereoscopic viewing zones |
JP4655771B2 (en) | 2005-06-17 | 2011-03-23 | ソニー株式会社 | Optical device and virtual image display device |
EP1902343B1 (en) | 2005-06-24 | 2011-05-18 | RealD Inc. | Autostereoscopic display with increased sharpness for non-primary viewing zones |
JP4862298B2 (en) | 2005-06-30 | 2012-01-25 | ソニー株式会社 | Optical device and virtual image display device |
KR100972350B1 (en) * | 2005-07-07 | 2010-07-26 | 노키아 코포레이션 | Manufacturing of optical waveguides by embossing grooves by rolling |
WO2007010531A2 (en) | 2005-07-19 | 2007-01-25 | Elbit Systems Electro-Optics Elop Ltd. | Method and system for visually presenting a high dynamic range image |
US7271960B2 (en) | 2005-07-25 | 2007-09-18 | Stewart Robert J | Universal vehicle head up display (HUD) device and method for using the same |
US7513668B1 (en) | 2005-08-04 | 2009-04-07 | Rockwell Collins, Inc. | Illumination system for a head up display |
US7397606B1 (en) | 2005-08-04 | 2008-07-08 | Rockwell Collins, Inc. | Meniscus head up display combiner |
WO2007015141A2 (en) | 2005-08-04 | 2007-02-08 | Milan Momcilo Popovich | Laser illuminator |
JP4077508B2 (en) | 2005-08-29 | 2008-04-16 | 松下電器産業株式会社 | Lens manufacturing method |
US7666331B2 (en) | 2005-08-31 | 2010-02-23 | Transitions Optical, Inc. | Photochromic article |
US7434940B2 (en) | 2005-09-06 | 2008-10-14 | Hewlett-Packard Development Company, L.P. | Light coupling system and method |
US9081178B2 (en) | 2005-09-07 | 2015-07-14 | Bae Systems Plc | Projection display for displaying an image to a viewer |
ATE447726T1 (en) | 2005-09-07 | 2009-11-15 | Bae Systems Plc | PROJECTION DISPLAY WITH A ROD-LIKE WAVEGUIDE WITH A RECTANGULAR CROSS SECTION AND A PLATE-LIKE WAVEGUIDE, EACH HAVING A DIFFRACTION GRIDING |
IL173361A (en) | 2005-09-12 | 2012-03-29 | Elbit Systems Ltd | Near eye display system |
US20080043334A1 (en) | 2006-08-18 | 2008-02-21 | Mirage Innovations Ltd. | Diffractive optical relay and method for manufacturing the same |
CN101263412A (en) | 2005-09-14 | 2008-09-10 | 米拉茨创新有限公司 | Diffractive optical device and system |
WO2007031991A2 (en) | 2005-09-14 | 2007-03-22 | Mirage Innovations Ltd. | Diffractive optical device and system |
GB0518912D0 (en) | 2005-09-16 | 2005-10-26 | Light Blue Optics Ltd | Methods and apparatus for displaying images using holograms |
JP2007086145A (en) | 2005-09-20 | 2007-04-05 | Sony Corp | Three-dimensional display |
JP4810949B2 (en) | 2005-09-29 | 2011-11-09 | ソニー株式会社 | Optical device and image display device |
JP4998817B2 (en) | 2005-09-30 | 2012-08-15 | 大日本印刷株式会社 | Hologram exposure apparatus and hologram exposure method |
WO2007043005A1 (en) | 2005-10-12 | 2007-04-19 | Koninklijke Philips Electronics N. V. | All polymer optical waveguide sensor |
US20070089625A1 (en) | 2005-10-20 | 2007-04-26 | Elbit Vision Systems Ltd. | Method and system for detecting defects during the fabrication of a printing cylinder |
US8018579B1 (en) | 2005-10-21 | 2011-09-13 | Apple Inc. | Three-dimensional imaging and display system |
EP2634618A1 (en) | 2005-10-27 | 2013-09-04 | Real Inc. | Temperature compensation for the differential expansion of an autostereoscopic lenticular array and display screen |
JP2007121893A (en) | 2005-10-31 | 2007-05-17 | Olympus Corp | Polarization switching liquid crystal element and image display device equipped with element |
EP1943556B1 (en) | 2005-11-03 | 2009-02-11 | Mirage Innovations Ltd. | Binocular optical relay device |
IL171820A (en) | 2005-11-08 | 2014-04-30 | Lumus Ltd | Polarizing optical device for light coupling |
US10048499B2 (en) | 2005-11-08 | 2018-08-14 | Lumus Ltd. | Polarizing optical system |
WO2007054738A1 (en) | 2005-11-10 | 2007-05-18 | Bae Systems Plc | A display source |
IL179135A (en) | 2005-11-10 | 2010-11-30 | Elbit Systems Electro Optics Elop Ltd | Head up display mechanism |
GB0522968D0 (en) | 2005-11-11 | 2005-12-21 | Popovich Milan M | Holographic illumination device |
JP2009521137A (en) | 2005-11-14 | 2009-05-28 | リアルデー | Monitor with integral interdigitation |
US7477206B2 (en) | 2005-12-06 | 2009-01-13 | Real D | Enhanced ZScreen modulator techniques |
US7583437B2 (en) | 2005-12-08 | 2009-09-01 | Real D | Projection screen with virtual compound curvature |
JP4668780B2 (en) | 2005-12-08 | 2011-04-13 | 矢崎総業株式会社 | Luminescent display device |
US7639911B2 (en) | 2005-12-08 | 2009-12-29 | Electronics And Telecommunications Research Institute | Optical device having optical waveguide including organic Bragg grating sheet |
US7522344B1 (en) | 2005-12-14 | 2009-04-21 | University Of Central Florida Research Foundation, Inc. | Projection-based head-mounted display with eye-tracking capabilities |
US20070133983A1 (en) | 2005-12-14 | 2007-06-14 | Matilda Traff | Light-controlling element for a camera |
US20070153227A1 (en) | 2005-12-22 | 2007-07-05 | Solbeam, Inc. | Method for directing light rays |
WO2007071794A2 (en) | 2005-12-22 | 2007-06-28 | Universite Jean-Monnet | Mirror structure and laser device comprising such a mirror structure |
US8233154B2 (en) | 2005-12-22 | 2012-07-31 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | High precision code plates and geophones |
IL172797A (en) | 2005-12-25 | 2012-09-24 | Elbit Systems Ltd | Real-time image scanning and processing |
JP4876904B2 (en) | 2005-12-28 | 2012-02-15 | 大日本印刷株式会社 | Hologram exposure apparatus and hologram exposure method |
US7953308B2 (en) | 2005-12-30 | 2011-05-31 | General Electric Company | System and method for fiber optic bundle-based illumination for imaging system |
US8384504B2 (en) | 2006-01-06 | 2013-02-26 | Quantum Design International, Inc. | Superconducting quick switch |
US20070160325A1 (en) | 2006-01-11 | 2007-07-12 | Hyungbin Son | Angle-tunable transmissive grating |
DE102006003785B4 (en) | 2006-01-25 | 2023-02-23 | Adc Automotive Distance Control Systems Gmbh | Sensor with an adjustable dimming device |
US8360578B2 (en) | 2006-01-26 | 2013-01-29 | Nokia Corporation | Eye tracker device |
US7760429B2 (en) | 2006-01-27 | 2010-07-20 | Reald Inc. | Multiple mode display device |
US7928862B1 (en) | 2006-01-30 | 2011-04-19 | Rockwell Collins, Inc. | Display of hover and touchdown symbology on head-up display |
IL173715A0 (en) | 2006-02-14 | 2007-03-08 | Lumus Ltd | Substrate-guided imaging lens |
JP2007219106A (en) | 2006-02-16 | 2007-08-30 | Konica Minolta Holdings Inc | Optical device for expanding diameter of luminous flux, video display device and head mount display |
KR101241770B1 (en) | 2006-02-17 | 2013-03-14 | 삼성디스플레이 주식회사 | Stereo-scopic image conversion panel and stereo-scopic image display apparatus having the same |
JP4572342B2 (en) | 2006-02-21 | 2010-11-04 | セイコーエプソン株式会社 | Electronics |
CN101389995B (en) | 2006-02-27 | 2012-08-22 | 诺基亚公司 | Diffraction gratings with tunable efficiency |
US20070206155A1 (en) | 2006-03-03 | 2007-09-06 | Real D | Steady state surface mode device for stereoscopic projection |
US7499217B2 (en) | 2006-03-03 | 2009-03-03 | University Of Central Florida Research Foundation, Inc. | Imaging systems for eyeglass-based display devices |
IL174170A (en) | 2006-03-08 | 2015-02-26 | Abraham Aharoni | Device and method for binocular alignment |
JP2007279313A (en) | 2006-04-05 | 2007-10-25 | Konica Minolta Holdings Inc | Method for manufacturing optical element, optical element, image display device and head mount display |
WO2007130130A2 (en) | 2006-04-06 | 2007-11-15 | Sbg Labs Inc. | Method and apparatus for providing a transparent display |
GB0718706D0 (en) | 2007-09-25 | 2007-11-07 | Creative Physics Ltd | Method and apparatus for reducing laser speckle |
US7679641B2 (en) | 2006-04-07 | 2010-03-16 | Real D | Vertical surround parallax correction |
WO2007127758A2 (en) | 2006-04-24 | 2007-11-08 | Displaytech, Inc | Spatial light modulators with changeable phase masks for use in holographic data storage |
US7843642B2 (en) | 2006-05-04 | 2010-11-30 | University Of Central Florida Research Foundation | Systems and methods for providing compact illumination in head mounted displays |
US7524053B2 (en) | 2006-05-12 | 2009-04-28 | Real D | 3-D eyewear |
US7740387B2 (en) | 2006-05-24 | 2010-06-22 | 3M Innovative Properties Company | Backlight wedge with side mounted light source |
WO2007141588A1 (en) | 2006-06-02 | 2007-12-13 | Nokia Corporation | Split exit pupil expander |
EP2033040B1 (en) | 2006-06-02 | 2020-04-29 | Magic Leap, Inc. | Stereoscopic exit pupil expander display |
JP2009539128A (en) | 2006-06-02 | 2009-11-12 | ノキア コーポレイション | Color distribution in exit pupil magnifier |
DE102006027415B3 (en) | 2006-06-13 | 2007-10-11 | Siemens Ag | Raman-pump laser activating and deactivating method, involves filtering pulse line with frequency of electrical service-signal from squared signal spectrum, where amplitude of line is evaluated for detection of optical service-signal |
US7415173B2 (en) | 2006-06-13 | 2008-08-19 | Nokia Corporation | Position sensor |
KR101229019B1 (en) | 2006-06-30 | 2013-02-15 | 엘지디스플레이 주식회사 | Liquid crystal display device and driving circuit of the same |
USRE46357E1 (en) | 2006-06-30 | 2017-04-04 | Hoya Corporation | Photochromic film, photochromic lens comprising the same, and method of manufacturing photochromic lens |
US8199803B2 (en) | 2006-07-14 | 2012-06-12 | Nokia Siemens Neworks GmbH & Co. KG | Receiver structure and method for the demodulation of a quadrature-modulated signal |
WO2008011066A2 (en) | 2006-07-18 | 2008-01-24 | L-1 Identity Solutions Operating Company | Methods and apparatus for self check-in of items for transportation |
US7517081B2 (en) | 2006-07-20 | 2009-04-14 | Real D | Low-cost circular polarizing eyewear |
IL177618A (en) | 2006-08-22 | 2015-02-26 | Lumus Ltd | Substrate- guided optical device |
US20100177388A1 (en) | 2006-08-23 | 2010-07-15 | Mirage Innovations Ltd. | Diffractive optical relay device with improved color uniformity |
US8736672B2 (en) | 2006-08-24 | 2014-05-27 | Reald Inc. | Algorithmic interaxial reduction |
CN200944140Y (en) | 2006-09-08 | 2007-09-05 | 李伯伦 | Straight waveguide display panel |
US8493433B2 (en) | 2006-09-12 | 2013-07-23 | Reald Inc. | Shuttering eyewear for use with stereoscopic liquid crystal display |
DE102006046555B4 (en) | 2006-09-28 | 2010-12-16 | Grintech Gmbh | Miniaturized optical imaging system with high lateral and axial resolution |
EP2076813B1 (en) | 2006-09-28 | 2017-12-20 | Nokia Technologies Oy | Beam expansion with three-dimensional diffractive elements |
US7525448B1 (en) | 2006-09-28 | 2009-04-28 | Rockwell Collins, Inc. | Enhanced vision system and method for an aircraft |
US8830143B1 (en) | 2006-09-28 | 2014-09-09 | Rockwell Collins, Inc. | Enhanced vision system and method for an aircraft |
GB0619226D0 (en) | 2006-09-29 | 2006-11-08 | Cambridge Flat Projection | Efficient wedge projection |
GB0619366D0 (en) | 2006-10-02 | 2006-11-08 | Cambridge Flat Projection | Distortionless wedge projection |
GB0620014D0 (en) | 2006-10-10 | 2006-11-22 | Cambridge Flat Projection | Prismatic film backlight |
US7857455B2 (en) | 2006-10-18 | 2010-12-28 | Reald Inc. | Combining P and S rays for bright stereoscopic projection |
US7670004B2 (en) | 2006-10-18 | 2010-03-02 | Real D | Dual ZScreen® projection |
US8000491B2 (en) | 2006-10-24 | 2011-08-16 | Nokia Corporation | Transducer device and assembly |
CN102393548A (en) * | 2006-10-31 | 2012-03-28 | 株式会社日本触媒 | Flexible optical waveguide |
US20080106779A1 (en) | 2006-11-02 | 2008-05-08 | Infocus Corporation | Laser Despeckle Device |
US8155489B2 (en) | 2006-11-02 | 2012-04-10 | Nokia Corporation | Method for coupling light into a thin planar waveguide |
JP2008145619A (en) | 2006-12-08 | 2008-06-26 | Ricoh Co Ltd | Polymer dispersion liquid crystal type polarization selective hologram element and method of manufacturing the same |
US20100277803A1 (en) | 2006-12-14 | 2010-11-04 | Nokia Corporation | Display Device Having Two Operating Modes |
US20080151370A1 (en) | 2006-12-21 | 2008-06-26 | Real D | Method of recycling eyewear |
US20080155426A1 (en) | 2006-12-21 | 2008-06-26 | Microsoft Corporation | Visualization and navigation of search results |
US7775387B2 (en) | 2006-12-21 | 2010-08-17 | Reald Inc. | Eyewear receptacle |
US20100096562A1 (en) | 2006-12-21 | 2010-04-22 | Koninklijke Philips Electronics N.V. | Wiregrid waveguide |
JP5303928B2 (en) | 2006-12-26 | 2013-10-02 | 東レ株式会社 | Reflective polarizing plate, method for producing the same, and liquid crystal display device using the same |
USD559250S1 (en) | 2006-12-28 | 2008-01-08 | Kopin Corporation | Viewing device |
WO2008081070A1 (en) | 2006-12-28 | 2008-07-10 | Nokia Corporation | Device for expanding an exit pupil in two dimensions |
WO2008081071A1 (en) | 2006-12-28 | 2008-07-10 | Nokia Corporation | Light guide plate and a method of manufacturing thereof |
US8134434B2 (en) | 2007-01-05 | 2012-03-13 | Quantum Design, Inc. | Superconducting quick switch |
US7369911B1 (en) | 2007-01-10 | 2008-05-06 | International Business Machines Corporation | Methods, systems, and computer program products for managing movement of work-in-process materials in an automated manufacturing environment |
US20080172526A1 (en) | 2007-01-11 | 2008-07-17 | Akshat Verma | Method and System for Placement of Logical Data Stores to Minimize Request Response Time |
US8022942B2 (en) | 2007-01-25 | 2011-09-20 | Microsoft Corporation | Dynamic projected user interface |
US7508589B2 (en) | 2007-02-01 | 2009-03-24 | Real D | Soft aperture correction for lenticular screens |
US7808708B2 (en) | 2007-02-01 | 2010-10-05 | Reald Inc. | Aperture correction for lenticular screens |
JP4984938B2 (en) | 2007-02-07 | 2012-07-25 | 大日本印刷株式会社 | Optical element and manufacturing method thereof |
EP2441843A1 (en) | 2007-02-12 | 2012-04-18 | E. I. du Pont de Nemours and Company | Production of arachidonic acid in oilseed plants |
CN101548259A (en) | 2007-02-23 | 2009-09-30 | 诺基亚公司 | Optical actuators in keypads |
CA2677701A1 (en) | 2007-02-28 | 2008-09-04 | L-3 Communications Corporation | Systems and methods for aiding pilot situational awareness |
US20080226281A1 (en) | 2007-03-13 | 2008-09-18 | Real D | Business system for three-dimensional snapshots |
US20080273081A1 (en) | 2007-03-13 | 2008-11-06 | Lenny Lipton | Business system for two and three dimensional snapshots |
WO2008114502A1 (en) | 2007-03-19 | 2008-09-25 | Panasonic Corporation | Laser illuminating device and image display device |
US8014050B2 (en) | 2007-04-02 | 2011-09-06 | Vuzix Corporation | Agile holographic optical phased array device and applications |
US20080239067A1 (en) | 2007-04-02 | 2008-10-02 | Real D | Optical concatenation for field sequential stereoscpoic displays |
US20080239068A1 (en) | 2007-04-02 | 2008-10-02 | Real D | Color and polarization timeplexed stereoscopic display apparatus |
US8339566B2 (en) | 2007-04-16 | 2012-12-25 | North Carolina State University | Low-twist chiral liquid crystal polarization gratings and related fabrication methods |
JP4930840B2 (en) | 2007-04-18 | 2012-05-16 | 大日本印刷株式会社 | Hologram exposure apparatus and hologram exposure method |
WO2008129539A2 (en) | 2007-04-22 | 2008-10-30 | Lumus Ltd. | A collimating optical device and system |
US7600893B2 (en) | 2007-05-01 | 2009-10-13 | Exalos Ag | Display apparatus, method and light source |
DE102007021036A1 (en) | 2007-05-04 | 2008-11-06 | Carl Zeiss Ag | Display device and display method for binocular display of a multicolor image |
US8493630B2 (en) | 2007-05-10 | 2013-07-23 | L-I Indentity Solutions, Inc. | Identification reader |
WO2008144656A2 (en) | 2007-05-20 | 2008-11-27 | 3M Innovative Properties Company | Light recycling hollow cavity type display backlight |
JP5003291B2 (en) | 2007-05-31 | 2012-08-15 | コニカミノルタホールディングス株式会社 | Video display device |
US20080297731A1 (en) | 2007-06-01 | 2008-12-04 | Microvision, Inc. | Apparent speckle reduction apparatus and method for mems laser projection system |
IL183637A (en) | 2007-06-04 | 2013-06-27 | Zvi Lapidot | Distributed head-mounted display |
EP2153266B1 (en) | 2007-06-04 | 2020-03-11 | Magic Leap, Inc. | A diffractive beam expander and a virtual display based on a diffractive beam expander |
US8373744B2 (en) | 2007-06-07 | 2013-02-12 | Reald Inc. | Stereoplexing for video and film applications |
US8487982B2 (en) | 2007-06-07 | 2013-07-16 | Reald Inc. | Stereoplexing for film and video applications |
US20080316303A1 (en) | 2007-06-08 | 2008-12-25 | Joseph Chiu | Display Device |
CA2689672C (en) | 2007-06-11 | 2016-01-19 | Moog Limited | Low-profile transformer |
US20080309586A1 (en) | 2007-06-13 | 2008-12-18 | Anthony Vitale | Viewing System for Augmented Reality Head Mounted Display |
EP2485075B1 (en) | 2007-06-14 | 2014-07-16 | Nokia Corporation | Displays with integrated backlighting |
US7633666B2 (en) | 2007-06-20 | 2009-12-15 | Real D | ZScreen® modulator with wire grid polarizer for stereoscopic projection |
US7589901B2 (en) | 2007-07-10 | 2009-09-15 | Microvision, Inc. | Substrate-guided relays for use with scanned beam light sources |
WO2009010969A2 (en) | 2007-07-18 | 2009-01-22 | Elbit Systems Ltd. | Aircraft landing assistance |
US7733571B1 (en) | 2007-07-24 | 2010-06-08 | Rockwell Collins, Inc. | Phosphor screen and displays systems |
US7605719B1 (en) | 2007-07-25 | 2009-10-20 | Rockwell Collins, Inc. | System and methods for displaying a partial images and non-overlapping, shared-screen partial images acquired from vision systems |
JP5092609B2 (en) | 2007-08-01 | 2012-12-05 | ソニー株式会社 | Image display apparatus and driving method thereof |
IL185130A0 (en) | 2007-08-08 | 2008-01-06 | Semi Conductor Devices An Elbi | Thermal based system and method for detecting counterfeit drugs |
DE102007042385A1 (en) | 2007-09-04 | 2009-03-05 | Bundesdruckerei Gmbh | Method and apparatus for individual holographic drum exposure |
US7672549B2 (en) | 2007-09-10 | 2010-03-02 | Banyan Energy, Inc. | Solar energy concentrator |
US7656585B1 (en) | 2008-08-19 | 2010-02-02 | Microvision, Inc. | Embedded relay lens for head-up displays or the like |
JP5147849B2 (en) | 2007-09-14 | 2013-02-20 | パナソニック株式会社 | projector |
WO2009041055A1 (en) | 2007-09-26 | 2009-04-02 | Panasonic Corporation | Beam scan type display device, its display method, program, and integrated circuit |
US8491121B2 (en) | 2007-10-09 | 2013-07-23 | Elbit Systems Of America, Llc | Pupil scan apparatus |
IL195389A (en) | 2008-11-19 | 2013-12-31 | Elbit Systems Ltd | System and method for mapping a magnetic field |
EP2215513B1 (en) | 2007-10-18 | 2015-05-20 | BAE Systems PLC | Improvements in or relating to head mounted display systems |
IL186884A (en) | 2007-10-24 | 2014-04-30 | Elta Systems Ltd | System and method for imaging objects |
US7969657B2 (en) | 2007-10-25 | 2011-06-28 | University Of Central Florida Research Foundation, Inc. | Imaging systems for eyeglass-based display devices |
US7866869B2 (en) | 2007-10-26 | 2011-01-11 | Corporation For Laser Optics Research | Laser illuminated backlight for flat panel displays |
CN101431085A (en) | 2007-11-09 | 2009-05-13 | 鸿富锦精密工业(深圳)有限公司 | Camera module group with automatic exposure function |
US20090128495A1 (en) | 2007-11-20 | 2009-05-21 | Microsoft Corporation | Optical input device |
CN101589329B (en) | 2007-11-21 | 2011-10-12 | 松下电器产业株式会社 | Display |
US20090136246A1 (en) | 2007-11-26 | 2009-05-28 | Kabushiki Kaisha Toshiba | Image forming apparatus having paper type detection section and paper type confirmation method of the same |
JP4395802B2 (en) | 2007-11-29 | 2010-01-13 | ソニー株式会社 | Image display device |
JP4450058B2 (en) | 2007-11-29 | 2010-04-14 | ソニー株式会社 | Image display device |
US8432372B2 (en) | 2007-11-30 | 2013-04-30 | Microsoft Corporation | User input using proximity sensing |
WO2009073749A1 (en) | 2007-12-03 | 2009-06-11 | Uni-Pixel Displays, Inc. | Light injection system and method for uniform luminosity of waveguide-based displays |
US8783931B2 (en) | 2007-12-03 | 2014-07-22 | Rambus Delaware Llc | Light injection system and method for uniform luminosity of waveguide-based displays |
US8132976B2 (en) | 2007-12-05 | 2012-03-13 | Microsoft Corporation | Reduced impact keyboard with cushioned keys |
WO2009077803A1 (en) | 2007-12-17 | 2009-06-25 | Nokia Corporation | Exit pupil expanders with spherical and aspheric substrates |
US8107023B2 (en) | 2007-12-18 | 2012-01-31 | Bae Systems Plc | Projection displays |
EP2225592B1 (en) | 2007-12-18 | 2015-04-22 | Nokia Technologies OY | Exit pupil expanders with wide field-of-view |
US8107780B2 (en) | 2007-12-18 | 2012-01-31 | Bae Systems Plc | Display projectors |
DE102008005817A1 (en) | 2008-01-24 | 2009-07-30 | Carl Zeiss Ag | Optical display device |
US8721149B2 (en) | 2008-01-30 | 2014-05-13 | Qualcomm Mems Technologies, Inc. | Illumination device having a tapered light guide |
ES2562063T3 (en) | 2008-02-14 | 2016-03-02 | Nokia Technologies Oy | Device and method to determine the direction of the gaze |
US7742070B2 (en) | 2008-02-21 | 2010-06-22 | Otto Gregory Glatt | Panoramic camera |
WO2009109965A2 (en) | 2008-03-04 | 2009-09-11 | Elbit Systems Electro Optics Elop Ltd. | Head up display utilizing an lcd and a diffuser |
US7589900B1 (en) | 2008-03-11 | 2009-09-15 | Microvision, Inc. | Eyebox shaping through virtual vignetting |
US7884593B2 (en) | 2008-03-26 | 2011-02-08 | Quantum Design, Inc. | Differential and symmetrical current source |
US20090242021A1 (en) | 2008-03-31 | 2009-10-01 | Noribachi Llc | Solar cell with colorization layer |
US8264498B1 (en) | 2008-04-01 | 2012-09-11 | Rockwell Collins, Inc. | System, apparatus, and method for presenting a monochrome image of terrain on a head-up display unit |
US20100149073A1 (en) | 2008-11-02 | 2010-06-17 | David Chaum | Near to Eye Display System and Appliance |
EP2276509B1 (en) | 2008-04-11 | 2016-06-15 | Seattle Genetics, Inc. | Detection and tratment of pancreatic, ovarian and other cancers |
EP2110701A1 (en) | 2008-04-14 | 2009-10-21 | BAE Systems PLC | Improvements in or relating to waveguides |
WO2009127856A1 (en) | 2008-04-14 | 2009-10-22 | Bae Systems Plc | Lamination of optical substrates |
ES2538731T3 (en) | 2008-04-14 | 2015-06-23 | Bae Systems Plc | Improvements in waveguides or related to them |
EP2272027B1 (en) | 2008-04-16 | 2014-03-26 | Elbit Systems Ltd. | Multispectral enhanced vision system and method for aircraft landing in inclement weather conditions |
KR20110004887A (en) | 2008-05-05 | 2011-01-14 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Light source module |
US8643691B2 (en) | 2008-05-12 | 2014-02-04 | Microsoft Corporation | Gaze accurate video conferencing |
USD581447S1 (en) | 2008-05-24 | 2008-11-25 | Oakley, Inc. | Eyeglass |
US7733572B1 (en) | 2008-06-09 | 2010-06-08 | Rockwell Collins, Inc. | Catadioptric system, apparatus, and method for producing images on a universal, head-up display |
JP4518193B2 (en) | 2008-06-10 | 2010-08-04 | ソニー株式会社 | Optical device and virtual image display device |
US8087698B2 (en) | 2008-06-18 | 2012-01-03 | L-1 Secure Credentialing, Inc. | Personalizing ID document images |
EP2141833B1 (en) | 2008-07-04 | 2013-10-16 | Nokia Siemens Networks Oy | Optical I-Q-modulator |
US8167173B1 (en) | 2008-07-21 | 2012-05-01 | 3Habto, Llc | Multi-stream draught beer dispensing system |
IL193326A (en) | 2008-08-07 | 2013-03-24 | Elbit Systems Electro Optics Elop Ltd | Wide field of view coverage head-up display system |
US7984884B1 (en) | 2008-08-08 | 2011-07-26 | B.I.G. Ideas, LLC | Artificial christmas tree stand |
JP4706737B2 (en) | 2008-08-18 | 2011-06-22 | ソニー株式会社 | Image display device |
JP4858512B2 (en) | 2008-08-21 | 2012-01-18 | ソニー株式会社 | Head-mounted display |
WO2010023444A1 (en) | 2008-08-27 | 2010-03-04 | Milan Momcilo Popovich | Laser display incorporating speckle reduction |
US7969644B2 (en) | 2008-09-02 | 2011-06-28 | Elbit Systems Of America, Llc | System and method for despeckling an image illuminated by a coherent light source |
US7660047B1 (en) | 2008-09-03 | 2010-02-09 | Microsoft Corporation | Flat panel lens |
US8142016B2 (en) | 2008-09-04 | 2012-03-27 | Innovega, Inc. | Method and apparatus for constructing a contact lens with optics |
US8520309B2 (en) | 2008-09-04 | 2013-08-27 | Innovega Inc. | Method and apparatus to process display and non-display information |
US8441731B2 (en) | 2008-09-04 | 2013-05-14 | Innovega, Inc. | System and apparatus for pixel matrix see-through display panels |
US8482858B2 (en) | 2008-09-04 | 2013-07-09 | Innovega Inc. | System and apparatus for deflection optics |
CA2737505C (en) | 2008-09-16 | 2017-08-29 | Pacific Biosciences Of California, Inc. | Substrates and optical systems and methods of use thereof |
ES2758826T3 (en) | 2008-09-16 | 2020-05-06 | Bae Systems Plc | Improvements in or related to waveguides |
US7961117B1 (en) | 2008-09-16 | 2011-06-14 | Rockwell Collins, Inc. | System, module, and method for creating a variable FOV image presented on a HUD combiner unit |
US8552925B2 (en) | 2008-09-24 | 2013-10-08 | Kabushiki Kaisha Toshiba | Stereoscopic image display apparatus |
US8384730B1 (en) | 2008-09-26 | 2013-02-26 | Rockwell Collins, Inc. | System, module, and method for generating HUD image data from synthetic vision system image data |
US20100079865A1 (en) | 2008-09-26 | 2010-04-01 | Nokia Corporation | Near-to-eye scanning display with exit-pupil expansion |
FR2936613B1 (en) | 2008-09-30 | 2011-03-18 | Commissariat Energie Atomique | LIGHT COUPLER BETWEEN AN OPTICAL FIBER AND A WAVEGUIDE MADE ON A SOIL SUBSTRATE. |
US8132948B2 (en) | 2008-10-17 | 2012-03-13 | Microsoft Corporation | Method and apparatus for directing light around an obstacle using an optical waveguide for uniform lighting of a cylindrical cavity |
JP4636164B2 (en) | 2008-10-23 | 2011-02-23 | ソニー株式会社 | Head-mounted display |
US7949214B2 (en) | 2008-11-06 | 2011-05-24 | Microvision, Inc. | Substrate guided relay with pupil expanding input coupler |
US8188925B2 (en) | 2008-11-07 | 2012-05-29 | Microsoft Corporation | Bent monopole antenna with shared segments |
WO2010057219A1 (en) | 2008-11-17 | 2010-05-20 | Luminit Llc | Holographic substrate-guided wave-based see-through display |
TWI379102B (en) | 2008-11-20 | 2012-12-11 | Largan Precision Co Ltd | Optical lens system for taking image |
JP2010132485A (en) | 2008-12-03 | 2010-06-17 | Keio Gijuku | Method for forming mesoporous silica film, the porous film, anti-reflection coating film and optical element |
CN102067484B (en) | 2008-12-08 | 2015-11-25 | 骁阳网络有限公司 | The method of the data processing in optical-fiber network and optical-fiber network parts and communication system |
ES2721600T5 (en) | 2008-12-12 | 2022-04-11 | Bae Systems Plc | Improvements in or related to waveguides |
EP2197018A1 (en) | 2008-12-12 | 2010-06-16 | FEI Company | Method for determining distortions in a particle-optical apparatus |
US9465213B2 (en) | 2008-12-12 | 2016-10-11 | Bae Systems Plc | Waveguides |
ES2717200T3 (en) | 2008-12-12 | 2019-06-19 | Bae Systems Plc | Improvements in waveguides or related to these |
JP4674634B2 (en) | 2008-12-19 | 2011-04-20 | ソニー株式会社 | Head-mounted display |
LT2382605T (en) | 2009-01-07 | 2021-01-11 | Magnetic Autocontrol Gmbh | Apparatus for a checkpoint |
US8380749B2 (en) | 2009-01-14 | 2013-02-19 | Bmc Software, Inc. | MDR federation facility for CMDBf |
CN101793555B (en) | 2009-02-01 | 2012-10-24 | 复旦大学 | Bragg body grating monochromator prepared from electric tuning holographic polymer dispersed liquid crystal (HPDLC) |
CN101793987A (en) | 2009-02-01 | 2010-08-04 | 复旦大学 | Preparation material of high-efficiency holographic polymer dispersed liquid crystal Bragg volume grating and preparation method thereof |
IL196923A (en) | 2009-02-05 | 2014-01-30 | Elbit Systems Ltd | Controlling an imaging apparatus over a delayed communication link |
EP2219073B1 (en) | 2009-02-17 | 2020-06-03 | Covestro Deutschland AG | Holographic media and photopolymer compositions |
FI20095197A0 (en) | 2009-02-27 | 2009-02-27 | Epicrystals Oy | Image projector and lightness suitable for use in an image projector |
IL197417A (en) | 2009-03-05 | 2014-01-30 | Elbit Sys Electro Optics Elop | Imaging device and method for correcting longitudinal and transverse chromatic aberrations |
WO2010102295A1 (en) | 2009-03-06 | 2010-09-10 | The Curators Of The University Of Missouri | Adaptive lens for vision correction |
KR20100102774A (en) | 2009-03-12 | 2010-09-27 | 삼성전자주식회사 | Touch sensing system and display apparatus employing the same |
US20100231498A1 (en) | 2009-03-13 | 2010-09-16 | Microsoft Corporation | Image display via multiple light guide sections |
US20100232003A1 (en) | 2009-03-13 | 2010-09-16 | Transitions Optical, Inc. | Vision enhancing optical articles |
JP2010226660A (en) | 2009-03-25 | 2010-10-07 | Olympus Corp | Spectacle mount type image display device |
JP5389493B2 (en) | 2009-03-25 | 2014-01-15 | オリンパス株式会社 | Glasses-mounted image display device |
US8746008B1 (en) | 2009-03-29 | 2014-06-10 | Montana Instruments Corporation | Low vibration cryocooled system for low temperature microscopy and spectroscopy applications |
US8427439B2 (en) | 2009-04-13 | 2013-04-23 | Microsoft Corporation | Avoiding optical effects of touch on liquid crystal display |
ES2644595T3 (en) | 2009-04-14 | 2017-11-29 | Bae Systems Plc | Optical waveguide and display device |
US8136690B2 (en) | 2009-04-14 | 2012-03-20 | Microsoft Corporation | Sensing the amount of liquid in a vessel |
EP2422228B1 (en) | 2009-04-20 | 2023-01-25 | BAE Systems PLC | Improvements in optical waveguides |
AU2010240707B2 (en) | 2009-04-20 | 2014-01-30 | Snap Inc. | Surface relief grating in an optical waveguide having a reflecting surface and dielectric layer conforming to the surface |
EP2244114A1 (en) | 2009-04-20 | 2010-10-27 | BAE Systems PLC | Surface relief grating in an optical waveguide having a reflecting surface and dielectric layer conforming to the surface |
US8323854B2 (en) | 2009-04-23 | 2012-12-04 | Akonia Holographics, Llc | Photopolymer media with enhanced dynamic range |
US8639072B2 (en) | 2011-10-19 | 2014-01-28 | Milan Momcilo Popovich | Compact wearable display |
WO2010125337A2 (en) | 2009-04-27 | 2010-11-04 | Milan Momcilo Popovich | Compact holographic edge illuminated wearable display |
US9335604B2 (en) | 2013-12-11 | 2016-05-10 | Milan Momcilo Popovich | Holographic waveguide display |
EP2425291B1 (en) | 2009-04-29 | 2022-10-19 | BAE Systems PLC | Head mounted display |
US8321810B2 (en) | 2009-04-30 | 2012-11-27 | Microsoft Corporation | Configuring an adaptive input device with selected graphical images |
GB2539107B (en) | 2009-06-01 | 2017-04-05 | Wilcox Ind Corp | Helmet mount for viewing device |
US20100322555A1 (en) | 2009-06-22 | 2010-12-23 | Imec | Grating Structures for Simultaneous Coupling to TE and TM Waveguide Modes |
US8917962B1 (en) | 2009-06-24 | 2014-12-23 | Flex Lighting Ii, Llc | Method of manufacturing a light input coupler and lightguide |
US8194325B2 (en) | 2009-06-30 | 2012-06-05 | Nokia Corporation | Optical apparatus and method |
US20110001895A1 (en) | 2009-07-06 | 2011-01-06 | Dahl Scott R | Driving mechanism for liquid crystal based optical device |
US8699836B2 (en) | 2009-07-07 | 2014-04-15 | Alcatel Lucent | Optical coupler |
IL199763B (en) | 2009-07-08 | 2018-07-31 | Elbit Systems Ltd | Automatic video surveillance system and method |
US9244275B1 (en) | 2009-07-10 | 2016-01-26 | Rockwell Collins, Inc. | Visual display system using multiple image sources and heads-up-display system using the same |
JP5545076B2 (en) | 2009-07-22 | 2014-07-09 | ソニー株式会社 | Image display device and optical device |
FR2948775B1 (en) | 2009-07-31 | 2011-12-02 | Horiba Jobin Yvon Sas | PLANAR OPTICAL POLYCHROMATIC IMAGING SYSTEM WITH BROAD FIELD OF VISION |
US8184363B2 (en) | 2009-08-07 | 2012-05-22 | Northrop Grumman Systems Corporation | All-fiber integrated high power coherent beam combination |
WO2011015843A2 (en) | 2009-08-07 | 2011-02-10 | Light Blue Optics Ltd | Head up displays |
US8447365B1 (en) | 2009-08-11 | 2013-05-21 | Howard M. Imanuel | Vehicle communication system |
US7884992B1 (en) | 2009-08-13 | 2011-02-08 | Darwin Optical Co., Ltd. | Photochromic optical article |
US8354806B2 (en) | 2009-08-21 | 2013-01-15 | Microsoft Corporation | Scanning collimation of light via flat panel lamp |
US20110044582A1 (en) | 2009-08-21 | 2011-02-24 | Microsoft Corporation | Efficient collimation of light with optical wedge |
US8354640B2 (en) | 2009-09-11 | 2013-01-15 | Identix Incorporated | Optically based planar scanner |
JP5526682B2 (en) | 2009-09-29 | 2014-06-18 | 大日本印刷株式会社 | Holographic optical element and method of manufacturing holographic optical element |
US8120548B1 (en) | 2009-09-29 | 2012-02-21 | Rockwell Collins, Inc. | System, module, and method for illuminating a target on an aircraft windshield |
US8233204B1 (en) | 2009-09-30 | 2012-07-31 | Rockwell Collins, Inc. | Optical displays |
US9341846B2 (en) | 2012-04-25 | 2016-05-17 | Rockwell Collins Inc. | Holographic wide angle display |
US11320571B2 (en) | 2012-11-16 | 2022-05-03 | Rockwell Collins, Inc. | Transparent waveguide display providing upper and lower fields of view with uniform light extraction |
US8384896B2 (en) | 2009-10-01 | 2013-02-26 | Tornado Medical Systems, Inc. | Optical slicer for improving the spectral resolution of a dispersive spectrograph |
US8089568B1 (en) | 2009-10-02 | 2012-01-03 | Rockwell Collins, Inc. | Method of and system for providing a head up display (HUD) |
US11204540B2 (en) | 2009-10-09 | 2021-12-21 | Digilens Inc. | Diffractive waveguide providing a retinal image |
US20200057353A1 (en) | 2009-10-09 | 2020-02-20 | Digilens Inc. | Compact Edge Illuminated Diffractive Display |
US9075184B2 (en) | 2012-04-17 | 2015-07-07 | Milan Momcilo Popovich | Compact edge illuminated diffractive display |
USD659137S1 (en) | 2009-10-19 | 2012-05-08 | Brother Industries, Ltd. | Image display device |
US8885112B2 (en) | 2009-10-27 | 2014-11-11 | Sbg Labs, Inc. | Compact holographic edge illuminated eyeglass display |
WO2011055109A2 (en) | 2009-11-03 | 2011-05-12 | Milan Momcilo Popovich | Apparatus for reducing laser speckle |
TWI488877B (en) | 2009-11-03 | 2015-06-21 | Bayer Materialscience Ag | Process for producing a holographic film |
EP2497081B1 (en) | 2009-11-03 | 2013-10-16 | Bayer Intellectual Property GmbH | Method for producing holographic media |
US8384694B2 (en) | 2009-11-17 | 2013-02-26 | Microsoft Corporation | Infrared vision with liquid crystal display device |
US8578038B2 (en) | 2009-11-30 | 2013-11-05 | Nokia Corporation | Method and apparatus for providing access to social content |
US8698705B2 (en) | 2009-12-04 | 2014-04-15 | Vuzix Corporation | Compact near eye display with scanned image generation |
WO2011073673A1 (en) | 2009-12-17 | 2011-06-23 | Bae Systems Plc | Projector lens assembly |
CN102696216B (en) | 2009-12-28 | 2015-08-12 | 佳能元件股份有限公司 | Contact-type image sensor unit and use the image read-out of this unit |
US8982480B2 (en) | 2009-12-29 | 2015-03-17 | Elbit Systems Of America, Llc | System and method for adjusting a projected image |
US8905547B2 (en) | 2010-01-04 | 2014-12-09 | Elbit Systems Of America, Llc | System and method for efficiently delivering rays from a light source to create an image |
WO2011085233A1 (en) | 2010-01-07 | 2011-07-14 | Holotouch, Inc. | Compact holographic human-machine interface |
EP2529268A1 (en) | 2010-01-25 | 2012-12-05 | BAE Systems Plc | Projection display |
US8137981B2 (en) | 2010-02-02 | 2012-03-20 | Nokia Corporation | Apparatus and associated methods |
US8659826B1 (en) | 2010-02-04 | 2014-02-25 | Rockwell Collins, Inc. | Worn display system and method without requiring real time tracking for boresight precision |
CA2789607C (en) | 2010-02-16 | 2018-05-01 | Midmark Corporation | Led light for examinations and procedures |
US20140063055A1 (en) | 2010-02-28 | 2014-03-06 | Osterhout Group, Inc. | Ar glasses specific user interface and control interface based on a connected external device type |
US20120194420A1 (en) | 2010-02-28 | 2012-08-02 | Osterhout Group, Inc. | Ar glasses with event triggered user action control of ar eyepiece facility |
US20120249797A1 (en) | 2010-02-28 | 2012-10-04 | Osterhout Group, Inc. | Head-worn adaptive display |
CN102906623A (en) | 2010-02-28 | 2013-01-30 | 奥斯特豪特集团有限公司 | Local advertising content on an interactive head-mounted eyepiece |
US9128281B2 (en) | 2010-09-14 | 2015-09-08 | Microsoft Technology Licensing, Llc | Eyepiece with uniformly illuminated reflective display |
US9097890B2 (en) | 2010-02-28 | 2015-08-04 | Microsoft Technology Licensing, Llc | Grating in a light transmissive illumination system for see-through near-eye display glasses |
US8472120B2 (en) | 2010-02-28 | 2013-06-25 | Osterhout Group, Inc. | See-through near-eye display glasses with a small scale image source |
US9223134B2 (en) | 2010-02-28 | 2015-12-29 | Microsoft Technology Licensing, Llc | Optical imperfections in a light transmissive illumination system for see-through near-eye display glasses |
US9341843B2 (en) | 2010-02-28 | 2016-05-17 | Microsoft Technology Licensing, Llc | See-through near-eye display glasses with a small scale image source |
US9366862B2 (en) | 2010-02-28 | 2016-06-14 | Microsoft Technology Licensing, Llc | System and method for delivering content to a group of see-through near eye display eyepieces |
US9129295B2 (en) | 2010-02-28 | 2015-09-08 | Microsoft Technology Licensing, Llc | See-through near-eye display glasses with a fast response photochromic film system for quick transition from dark to clear |
US8964298B2 (en) | 2010-02-28 | 2015-02-24 | Microsoft Corporation | Video display modification based on sensor input for a see-through near-to-eye display |
US8488246B2 (en) | 2010-02-28 | 2013-07-16 | Osterhout Group, Inc. | See-through near-eye display glasses including a curved polarizing film in the image source, a partially reflective, partially transmitting optical element and an optically flat film |
CA2789965C (en) | 2010-03-03 | 2017-06-06 | Elbit Systems Ltd. | System for guiding an aircraft to a reference point in low visibility conditions |
US9753297B2 (en) | 2010-03-04 | 2017-09-05 | Nokia Corporation | Optical apparatus and method for expanding an exit pupil |
JP5570460B2 (en) | 2010-03-10 | 2014-08-13 | オーエフエス ファイテル,エルエルシー | Multi-core fiber transmission system and multi-core fiber transmission method |
WO2011110821A1 (en) | 2010-03-12 | 2011-09-15 | Milan Momcilo Popovich | Biometric sensor |
EP2372454A1 (en) | 2010-03-29 | 2011-10-05 | Bayer MaterialScience AG | Photopolymer formulation for producing visible holograms |
JP2011216701A (en) | 2010-03-31 | 2011-10-27 | Sony Corp | Solid-state imaging apparatus and electronic device |
US8697346B2 (en) | 2010-04-01 | 2014-04-15 | The Regents Of The University Of Colorado | Diffraction unlimited photolithography |
US9028123B2 (en) | 2010-04-16 | 2015-05-12 | Flex Lighting Ii, Llc | Display illumination device with a film-based lightguide having stacked incident surfaces |
WO2011132789A1 (en) | 2010-04-19 | 2011-10-27 | シチズンホールディングス株式会社 | Pre-edging lens and edging lens manufacturing method |
EP2381290A1 (en) | 2010-04-23 | 2011-10-26 | BAE Systems PLC | Optical waveguide and display device |
WO2011131978A1 (en) | 2010-04-23 | 2011-10-27 | Bae Systems Plc | Optical waveguide and display device |
JP5471775B2 (en) | 2010-04-27 | 2014-04-16 | 大日本印刷株式会社 | Hologram manufacturing method and exposure apparatus |
US8477261B2 (en) | 2010-05-26 | 2013-07-02 | Microsoft Corporation | Shadow elimination in the backlight for a 3-D display |
IL206143A (en) | 2010-06-02 | 2016-06-30 | Eyal Shekel | Coherent optical amplifier |
CN101881936B (en) | 2010-06-04 | 2013-12-25 | 江苏慧光电子科技有限公司 | Holographical wave guide display and generation method of holographical image thereof |
US8631333B2 (en) | 2010-06-07 | 2014-01-14 | Microsoft Corporation | Feature set differentiation by tenant and user |
NL2006743A (en) | 2010-06-09 | 2011-12-12 | Asml Netherlands Bv | Position sensor and lithographic apparatus. |
JP5488226B2 (en) | 2010-06-10 | 2014-05-14 | 富士通オプティカルコンポーネンツ株式会社 | Mach-Zehnder type optical modulator |
US8670029B2 (en) | 2010-06-16 | 2014-03-11 | Microsoft Corporation | Depth camera illuminator with superluminescent light-emitting diode |
US8253914B2 (en) | 2010-06-23 | 2012-08-28 | Microsoft Corporation | Liquid crystal display (LCD) |
JP2012014804A (en) | 2010-07-01 | 2012-01-19 | Sharp Corp | Manufacturing device of master disk and method for manufacturing master disk |
US8391656B2 (en) | 2010-07-29 | 2013-03-05 | Hewlett-Packard Development Company, L.P. | Grating coupled converter |
US9063261B2 (en) | 2010-08-10 | 2015-06-23 | Sharp Kabushiki Kaisha | Light-controlling element, display device and illumination device |
JP6027970B2 (en) | 2010-09-10 | 2016-11-16 | バーレイス テクノロジーズ エルエルシー | Method of manufacturing an optoelectronic device using a layer separated from a semiconductor donor and device manufactured thereby |
USD691192S1 (en) | 2010-09-10 | 2013-10-08 | 3M Innovative Properties Company | Eyewear lens feature |
US8649099B2 (en) | 2010-09-13 | 2014-02-11 | Vuzix Corporation | Prismatic multiple waveguide for near-eye display |
US8582206B2 (en) | 2010-09-15 | 2013-11-12 | Microsoft Corporation | Laser-scanning virtual image display |
US8376548B2 (en) | 2010-09-22 | 2013-02-19 | Vuzix Corporation | Near-eye display with on-axis symmetry |
US8633786B2 (en) | 2010-09-27 | 2014-01-21 | Nokia Corporation | Apparatus and associated methods |
US20150015946A1 (en) | 2010-10-08 | 2015-01-15 | SoliDDD Corp. | Perceived Image Depth for Autostereoscopic Displays |
ES2804475T3 (en) | 2010-10-19 | 2021-02-08 | Bae Systems Plc | Display device comprising an image combiner |
US8305577B2 (en) | 2010-11-04 | 2012-11-06 | Nokia Corporation | Method and apparatus for spectrometry |
EP2635610A1 (en) | 2010-11-04 | 2013-09-11 | The Regents of the University of Colorado, A Body Corporate | Dual-cure polymer systems |
EP2450387A1 (en) | 2010-11-08 | 2012-05-09 | Bayer MaterialScience AG | Photopolymer formulation for producing holographic media |
EP2450893A1 (en) | 2010-11-08 | 2012-05-09 | Bayer MaterialScience AG | Photopolymer formula for producing of holographic media with highly networked matrix polymers |
US20130021586A1 (en) | 2010-12-07 | 2013-01-24 | Laser Light Engines | Frequency Control of Despeckling |
USD640310S1 (en) | 2010-12-21 | 2011-06-21 | Kabushiki Kaisha Toshiba | Glasses for 3-dimensional scenography |
JP2012138654A (en) | 2010-12-24 | 2012-07-19 | Sony Corp | Head-mounted display |
CA2822978C (en) | 2010-12-24 | 2019-02-19 | Hong Hua | An ergonomic head mounted display device and optical system |
JP5741901B2 (en) | 2010-12-27 | 2015-07-01 | Dic株式会社 | Birefringent lens material for stereoscopic image display device and method of manufacturing birefringent lens for stereoscopic image display device |
KR101807691B1 (en) | 2011-01-11 | 2017-12-12 | 삼성전자주식회사 | Three-dimensional image display apparatus |
BRPI1100786A2 (en) | 2011-01-19 | 2015-08-18 | André Jacobovitz | Photopolymer for volume hologram engraving and process to produce it |
US8619062B2 (en) | 2011-02-03 | 2013-12-31 | Microsoft Corporation | Touch-pressure sensing in a display panel |
USD661335S1 (en) | 2011-03-14 | 2012-06-05 | Lg Electronics Inc. | Glasses for 3D images |
US8189263B1 (en) | 2011-04-01 | 2012-05-29 | Google Inc. | Image waveguide with mirror arrays |
WO2012138414A1 (en) | 2011-04-06 | 2012-10-11 | Versatilis Llc | Optoelectronic device containing at least one active device layer having a wurtzite crystal structure, and methods of making same |
WO2012136970A1 (en) | 2011-04-07 | 2012-10-11 | Milan Momcilo Popovich | Laser despeckler based on angular diversity |
GB2505111B (en) | 2011-04-18 | 2015-12-02 | Bae Systems Plc | A projection display |
CN103635891B (en) | 2011-05-06 | 2017-10-27 | 奇跃公司 | The world is presented in a large amount of digital remotes simultaneously |
JP6129160B2 (en) | 2011-05-16 | 2017-05-17 | バーレイス テクノロジーズ エルエルシー | Improved resonator optoelectronic device and method of fabrication |
US20120321149A1 (en) | 2011-05-17 | 2012-12-20 | Carver John F | Fingerprint sensors |
CN103765329B (en) | 2011-06-06 | 2017-01-18 | 视瑞尔技术公司 | Method and device for the layered production of thin volume grid stacks, and beam combiner for a holographic display |
WO2012172295A1 (en) | 2011-06-16 | 2012-12-20 | Milan Momcilo Popovich | Holographic beam deflector for autostereoscopic displays |
KR101908468B1 (en) | 2011-06-27 | 2018-10-17 | 삼성디스플레이 주식회사 | Display panel |
US8693087B2 (en) | 2011-06-30 | 2014-04-08 | Microsoft Corporation | Passive matrix quantum dot display |
US8767294B2 (en) | 2011-07-05 | 2014-07-01 | Microsoft Corporation | Optic with extruded conic profile |
JP6193226B2 (en) | 2011-07-07 | 2017-09-06 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツングMerck Patent Gesellschaft mit beschraenkter Haftung | Liquid crystal media |
US8672486B2 (en) | 2011-07-11 | 2014-03-18 | Microsoft Corporation | Wide field-of-view projector |
GB2507020A (en) | 2011-07-13 | 2014-04-16 | Faro Tech Inc | Device and method using a spatial light modulator to find 3D coordinates of an object |
US8988474B2 (en) | 2011-07-18 | 2015-03-24 | Microsoft Technology Licensing, Llc | Wide field-of-view virtual image projector |
CN102279557B (en) | 2011-07-26 | 2013-10-30 | 华中科技大学 | Method for preparing colour three-dimensional hologram based on holographic polymer dispersed liquid crystal grating |
US10793067B2 (en) | 2011-07-26 | 2020-10-06 | Magna Electronics Inc. | Imaging system for vehicle |
US8907639B2 (en) | 2011-07-28 | 2014-12-09 | Fairchild Semiconductor Corporation | Boost power converter with high-side active damping in discontinuous conduction mode |
US8754831B2 (en) | 2011-08-02 | 2014-06-17 | Microsoft Corporation | Changing between display device viewing modes |
USD661334S1 (en) | 2011-08-05 | 2012-06-05 | Samsung Electronics Co., Ltd. | Glasses for watching 3D image |
US9983361B2 (en) | 2011-08-08 | 2018-05-29 | Greg S. Laughlin | GRIN-lensed, tuned wedge waveguide termination and method of reducing back reflection caused thereby |
US8472119B1 (en) | 2011-08-12 | 2013-06-25 | Google Inc. | Image waveguide having a bend |
GB201114149D0 (en) | 2011-08-17 | 2011-10-05 | Bae Systems Plc | Projection display |
US8548290B2 (en) | 2011-08-23 | 2013-10-01 | Vuzix Corporation | Dynamic apertured waveguide for near-eye display |
WO2013027006A1 (en) * | 2011-08-24 | 2013-02-28 | Milan Momcilo Popovich | Improvements to holographic polymer dispersed liquid crystal materials and devices |
US10670876B2 (en) | 2011-08-24 | 2020-06-02 | Digilens Inc. | Waveguide laser illuminator incorporating a despeckler |
US20140204455A1 (en) | 2011-08-24 | 2014-07-24 | Milan Momcilo Popovich | Wearable data display |
GB201114771D0 (en) | 2011-08-26 | 2011-10-12 | Bae Systems Plc | A display |
EP2751611B1 (en) | 2011-08-29 | 2018-01-10 | Vuzix Corporation | Controllable waveguide for near-eye display applications |
WO2013034879A1 (en) | 2011-09-07 | 2013-03-14 | Milan Momcilo Popovich | Method and apparatus for switching electro optical arrays |
US20150148728A1 (en) | 2011-09-08 | 2015-05-28 | Children's Medical Center Corporation | Isolated orthosis for thumb actuation |
US9035344B2 (en) | 2011-09-14 | 2015-05-19 | VerLASE TECHNOLOGIES LLC | Phosphors for use with LEDs and other optoelectronic devices |
US8998414B2 (en) | 2011-09-26 | 2015-04-07 | Microsoft Technology Licensing, Llc | Integrated eye tracking and display system |
US20140330159A1 (en) | 2011-09-26 | 2014-11-06 | Beth Israel Deaconess Medical Center, Inc. | Quantitative methods and systems for neurological assessment |
JP5696017B2 (en) | 2011-09-27 | 2015-04-08 | 富士フイルム株式会社 | Curable composition for imprint, pattern forming method and pattern |
US9377852B1 (en) | 2013-08-29 | 2016-06-28 | Rockwell Collins, Inc. | Eye tracking as a method to improve the user interface |
US8937772B1 (en) | 2011-09-30 | 2015-01-20 | Rockwell Collins, Inc. | System for and method of stowing HUD combiners |
US8749890B1 (en) | 2011-09-30 | 2014-06-10 | Rockwell Collins, Inc. | Compact head up display (HUD) for cockpits with constrained space envelopes |
US9366864B1 (en) | 2011-09-30 | 2016-06-14 | Rockwell Collins, Inc. | System for and method of displaying information without need for a combiner alignment detector |
US9715067B1 (en) | 2011-09-30 | 2017-07-25 | Rockwell Collins, Inc. | Ultra-compact HUD utilizing waveguide pupil expander with surface relief gratings in high refractive index materials |
US8634139B1 (en) | 2011-09-30 | 2014-01-21 | Rockwell Collins, Inc. | System for and method of catadioptric collimation in a compact head up display (HUD) |
US8903207B1 (en) | 2011-09-30 | 2014-12-02 | Rockwell Collins, Inc. | System for and method of extending vertical field of view in head up display utilizing a waveguide combiner |
US9599813B1 (en) | 2011-09-30 | 2017-03-21 | Rockwell Collins, Inc. | Waveguide combiner system and method with less susceptibility to glare |
GB201117029D0 (en) | 2011-10-04 | 2011-11-16 | Bae Systems Plc | Optical waveguide and display device |
KR20140111642A (en) | 2011-10-11 | 2014-09-19 | 펠리칸 이매징 코포레이션 | Lens stack arrays including adaptive optical elements |
KR20130039918A (en) | 2011-10-13 | 2013-04-23 | 주식회사 플렉스엘시디 | Active type stereoscopic glasses |
CN104011788B (en) | 2011-10-28 | 2016-11-16 | 奇跃公司 | For strengthening and the system and method for virtual reality |
CN103261936B (en) | 2011-11-08 | 2015-10-21 | 松下知识产权经营株式会社 | Possesses the optical pickup apparatus getting tabula rasa |
WO2013069250A1 (en) | 2011-11-08 | 2013-05-16 | パナソニック株式会社 | Light acquisition sheet, and light-receiving device and light-emitting device using same |
US20140140091A1 (en) | 2012-11-20 | 2014-05-22 | Sergiy Victorovich Vasylyev | Waveguide illumination system |
KR102440195B1 (en) | 2011-11-23 | 2022-09-02 | 매직 립, 인코포레이티드 | Three dimensional virtual and augmented reality display system |
US8651678B2 (en) | 2011-11-29 | 2014-02-18 | Massachusetts Institute Of Technology | Polarization fields for dynamic light field display |
USD673996S1 (en) | 2011-12-01 | 2013-01-08 | Lg Electronics Inc. | Glasses for watching 3D image |
US8917453B2 (en) | 2011-12-23 | 2014-12-23 | Microsoft Corporation | Reflective array waveguide |
CN104115053B (en) | 2011-12-23 | 2016-04-20 | 庄臣及庄臣视力保护公司 | Comprise the variable optical Ophthalmoligic instrument of liquid crystal cell |
US8638498B2 (en) | 2012-01-04 | 2014-01-28 | David D. Bohn | Eyebox adjustment for interpupillary distance |
WO2013102759A2 (en) | 2012-01-06 | 2013-07-11 | Milan Momcilo Popovich | Contact image sensor using switchable bragg gratings |
USD718304S1 (en) | 2012-01-06 | 2014-11-25 | Google Inc. | Display device component |
US9278674B2 (en) | 2012-01-18 | 2016-03-08 | Engineered Arresting Systems Corporation | Vehicle operator display and assistive mechanisms |
US8810600B2 (en) | 2012-01-23 | 2014-08-19 | Microsoft Corporation | Wearable display device calibration |
US20150107671A1 (en) | 2012-01-24 | 2015-04-23 | AMI Research & Development, LLC | Monolithic broadband energy collector with dichroic filters and mirrors embedded in waveguide |
US9000615B2 (en) | 2012-02-04 | 2015-04-07 | Sunfield Semiconductor Inc. | Solar power module with safety features and related method of operation |
US9001030B2 (en) | 2012-02-15 | 2015-04-07 | Google Inc. | Heads up display |
US8985803B2 (en) | 2012-03-21 | 2015-03-24 | Microsoft Technology Licensing, Llc | Freeform-prism eyepiece with illumination waveguide |
US8749886B2 (en) | 2012-03-21 | 2014-06-10 | Google Inc. | Wide-angle wide band polarizing beam splitter |
US9274338B2 (en) | 2012-03-21 | 2016-03-01 | Microsoft Technology Licensing, Llc | Increasing field of view of reflective waveguide |
US8736963B2 (en) | 2012-03-21 | 2014-05-27 | Microsoft Corporation | Two-dimensional exit-pupil expansion |
US11068049B2 (en) | 2012-03-23 | 2021-07-20 | Microsoft Technology Licensing, Llc | Light guide display and field of view |
GB2500631B (en) | 2012-03-27 | 2017-12-27 | Bae Systems Plc | Improvements in or relating to optical waveguides |
US10191515B2 (en) | 2012-03-28 | 2019-01-29 | Microsoft Technology Licensing, Llc | Mobile device light guide display |
US8830588B1 (en) | 2012-03-28 | 2014-09-09 | Rockwell Collins, Inc. | Reflector and cover glass for substrate guided HUD |
US9558590B2 (en) | 2012-03-28 | 2017-01-31 | Microsoft Technology Licensing, Llc | Augmented reality light guide display |
US9523852B1 (en) | 2012-03-28 | 2016-12-20 | Rockwell Collins, Inc. | Micro collimator system and method for a head up display (HUD) |
US9717981B2 (en) | 2012-04-05 | 2017-08-01 | Microsoft Technology Licensing, Llc | Augmented reality and physical games |
BR112014024941A2 (en) | 2012-04-05 | 2017-09-19 | Magic Leap Inc | Active Focusing Wide-field Imaging Device |
JP5994715B2 (en) | 2012-04-10 | 2016-09-21 | パナソニックIpマネジメント株式会社 | Computer generated hologram display |
JP6001320B2 (en) | 2012-04-23 | 2016-10-05 | 株式会社ダイセル | Photosensitive composition for volume hologram recording, volume hologram recording medium using the same, method for producing the same, and hologram recording method |
EP2841980A4 (en) | 2012-04-27 | 2016-01-13 | Leia Inc | Directional pixel for use in a display screen |
US9389415B2 (en) | 2012-04-27 | 2016-07-12 | Leia Inc. | Directional pixel for use in a display screen |
US20130312811A1 (en) | 2012-05-02 | 2013-11-28 | Prism Solar Technologies Incorporated | Non-latitude and vertically mounted solar energy concentrators |
US8721092B2 (en) | 2012-05-09 | 2014-05-13 | Microvision, Inc. | Wide field of view substrate guided relay |
TW201400946A (en) | 2012-05-09 | 2014-01-01 | Sony Corp | Illumination device, and display |
WO2013167864A1 (en) | 2012-05-11 | 2013-11-14 | Milan Momcilo Popovich | Apparatus for eye tracking |
US9235057B2 (en) | 2012-05-18 | 2016-01-12 | Reald Inc. | Polarization recovery in a directional display device |
WO2013176997A1 (en) | 2012-05-19 | 2013-11-28 | Skully Helmets, Inc. | Augmented reality motorcycle helmet |
US10502876B2 (en) | 2012-05-22 | 2019-12-10 | Microsoft Technology Licensing, Llc | Waveguide optics focus elements |
WO2013175225A1 (en) * | 2012-05-25 | 2013-11-28 | Cambridge Enterprise Limited | Printing of liquid crystal droplet laser resonators on a wet polymer solution and product made therewith |
US9459461B2 (en) | 2012-05-31 | 2016-10-04 | Leia Inc. | Directional backlight |
ES2865127T3 (en) | 2012-05-31 | 2021-10-15 | Leia Inc | Directional backlight |
US9201270B2 (en) | 2012-06-01 | 2015-12-01 | Leia Inc. | Directional backlight with a modulation layer |
WO2013180737A1 (en) | 2012-06-01 | 2013-12-05 | Hewlett-Packard Development Company, L.P. | Directional backlight with a modulation layer |
US8989535B2 (en) | 2012-06-04 | 2015-03-24 | Microsoft Technology Licensing, Llc | Multiple waveguide imaging structure |
US20130328948A1 (en) | 2012-06-06 | 2013-12-12 | Dolby Laboratories Licensing Corporation | Combined Emissive and Reflective Dual Modulation Display System |
CN104737061B (en) | 2012-06-11 | 2018-01-16 | 奇跃公司 | Use more depth plane three dimensional displays of the waveguided reflector arrays projector |
US9671566B2 (en) | 2012-06-11 | 2017-06-06 | Magic Leap, Inc. | Planar waveguide apparatus with diffraction element(s) and system employing same |
US20150177688A1 (en) | 2012-06-18 | 2015-06-25 | Milan Momcilo Popovich | Apparatus for copying a hologram |
US9098111B2 (en) | 2012-06-22 | 2015-08-04 | Microsoft Technology Licensing, Llc | Focus guidance within a three-dimensional interface |
US9841537B2 (en) | 2012-07-02 | 2017-12-12 | Nvidia Corporation | Near-eye microlens array displays |
US9367036B2 (en) | 2012-07-03 | 2016-06-14 | Samsung Electronics Co., Ltd. | High speed hologram recording apparatus |
US8816578B1 (en) | 2012-07-16 | 2014-08-26 | Rockwell Collins, Inc. | Display assembly configured for reduced reflection |
US10111989B2 (en) | 2012-07-26 | 2018-10-30 | Medline Industries, Inc. | Splash-retarding fluid collection system |
US9175975B2 (en) | 2012-07-30 | 2015-11-03 | RaayonNova LLC | Systems and methods for navigation |
US8913324B2 (en) | 2012-08-07 | 2014-12-16 | Nokia Corporation | Display illumination light guide |
US9146407B2 (en) | 2012-08-10 | 2015-09-29 | Mitsui Chemicals, Inc. | Fail-safe electro-active lenses and methodology for choosing optical materials for fail-safe electro-active lenses |
JP6291707B2 (en) | 2012-08-10 | 2018-03-14 | 三菱電機株式会社 | Contact image sensor, output correction device for contact image sensor, and output correction method for contact image sensor |
US8742952B1 (en) | 2012-08-14 | 2014-06-03 | Rockwell Collins, Inc. | Traffic awareness systems and methods |
US8885997B2 (en) | 2012-08-31 | 2014-11-11 | Microsoft Corporation | NED polarization system for wavelength pass-through |
WO2014039555A1 (en) | 2012-09-04 | 2014-03-13 | SoliDDD Corp. | Switchable lenticular array for autostereoscopic video displays |
DE102012108424A1 (en) | 2012-09-10 | 2014-03-13 | Institut für Mess- und Regelungstechnik der Leibniz Universität Hannover | Optical system for endoscopic applications, has image interface that is oriented parallel to object interface with surface geometry and is oriented orthogonally to optical axis of gradient index (GRIN) lens |
US8731350B1 (en) | 2012-09-11 | 2014-05-20 | The United States Of America As Represented By The Secretary Of The Navy | Planar-waveguide Bragg gratings in curved waveguides |
US10025089B2 (en) | 2012-10-05 | 2018-07-17 | Microsoft Technology Licensing, Llc | Backlight for viewing three-dimensional images from a display from variable viewing angles |
USD694310S1 (en) | 2012-10-23 | 2013-11-26 | Samsung Electronics Co., Ltd. | Glasses with earphones |
EP3211299A1 (en) | 2012-10-24 | 2017-08-30 | SeeReal Technologies S.A. | Illumination device |
GB201219126D0 (en) | 2012-10-24 | 2012-12-05 | Oxford Energy Technologies Ltd | Low refractive index particles |
JP2014089294A (en) | 2012-10-30 | 2014-05-15 | Toshiba Corp | Liquid crystal lens device and method for driving the same |
US9933684B2 (en) | 2012-11-16 | 2018-04-03 | Rockwell Collins, Inc. | Transparent waveguide display providing upper and lower fields of view having a specific light output aperture configuration |
WO2014080155A1 (en) | 2012-11-20 | 2014-05-30 | Milan Momcilo Popovich | Waveguide device for homogenizing illumination light |
US20150288129A1 (en) | 2012-11-28 | 2015-10-08 | VerLASE TECHNOLOGIES LLC | Optically Surface-Pumped Edge-Emitting Devices and Systems and Methods of Making Same |
US20140146394A1 (en) | 2012-11-28 | 2014-05-29 | Nigel David Tout | Peripheral display for a near-eye display device |
WO2014091200A1 (en) | 2012-12-10 | 2014-06-19 | Bae Systems Plc | Display comprising an optical waveguide and switchable diffraction gratings and method of producing the same |
WO2014091204A1 (en) | 2012-12-10 | 2014-06-19 | Bae Systems Plc | Display comprising an optical waveguide and switchable diffraction gratings and method of producing the same |
GB2508661A (en) | 2012-12-10 | 2014-06-11 | Bae Systems Plc | Improved display |
WO2014091201A1 (en) | 2012-12-10 | 2014-06-19 | Bae Systems Plc | Improvements in and relating to displays |
US8937771B2 (en) | 2012-12-12 | 2015-01-20 | Microsoft Corporation | Three piece prism eye-piece |
US20140168260A1 (en) | 2012-12-13 | 2014-06-19 | Paul M. O'Brien | Waveguide spacers within an ned device |
CN104854489B (en) | 2012-12-14 | 2019-09-17 | 默克专利股份有限公司 | Birefringent RM lens |
JP6048901B2 (en) | 2012-12-14 | 2016-12-21 | エルジー・ケム・リミテッド | Liquid crystal element (Liquid Crystal Element) |
US10311609B2 (en) | 2012-12-17 | 2019-06-04 | Clinton B. Smith | Method and system for the making, storage and display of virtual image edits |
US10146053B2 (en) | 2012-12-19 | 2018-12-04 | Microsoft Technology Licensing, Llc | Multiplexed hologram tiling in a waveguide display |
US10192358B2 (en) | 2012-12-20 | 2019-01-29 | Microsoft Technology Licensing, Llc | Auto-stereoscopic augmented reality display |
GB2509536A (en) | 2013-01-08 | 2014-07-09 | Bae Systems Plc | Diffraction grating |
US10422934B2 (en) | 2013-01-08 | 2019-09-24 | Bae Systems Plc | Diffraction gratings and the manufacture thereof |
US9842562B2 (en) | 2013-01-13 | 2017-12-12 | Qualcomm Incorporated | Dynamic zone plate augmented vision eyeglasses |
IL283193B (en) | 2013-01-15 | 2022-08-01 | Magic Leap Inc | System for scanning electromagnetic imaging radiation |
US20140204437A1 (en) | 2013-01-23 | 2014-07-24 | Akonia Holographics Llc | Dynamic aperture holographic multiplexing |
US8873149B2 (en) | 2013-01-28 | 2014-10-28 | David D. Bohn | Projection optical system for coupling image light to a near-eye display |
US9298168B2 (en) | 2013-01-31 | 2016-03-29 | Leia Inc. | Multiview 3D wrist watch |
ES2758453T3 (en) | 2013-01-31 | 2020-05-05 | Leia Inc | 3D multiview wristwatch |
US20140240842A1 (en) | 2013-02-22 | 2014-08-28 | Ian Nguyen | Alignment-insensitive image input coupling |
US20140253988A1 (en) | 2013-03-06 | 2014-09-11 | Zebra Imaging, Inc. | Hologram generating apparatus |
IL313175A (en) | 2013-03-11 | 2024-07-01 | Magic Leap Inc | System and method for augmented and virtual reality |
US20140268277A1 (en) | 2013-03-14 | 2014-09-18 | Andreas Georgiou | Image correction using reconfigurable phase mask |
US20160054563A9 (en) | 2013-03-14 | 2016-02-25 | Honda Motor Co., Ltd. | 3-dimensional (3-d) navigation |
US10042186B2 (en) | 2013-03-15 | 2018-08-07 | Ipventure, Inc. | Electronic eyewear and display |
BR112015022695B1 (en) | 2013-03-15 | 2021-02-02 | Station 4 Llc | device and method for flexing a tab |
NZ735754A (en) | 2013-03-15 | 2019-04-26 | Magic Leap Inc | Display system and method |
GB2512077B (en) | 2013-03-19 | 2019-10-23 | Univ Erasmus Med Ct Rotterdam | Intravascular optical imaging system |
GB201305691D0 (en) | 2013-03-28 | 2013-05-15 | Bae Systems Plc | Improvements in and relating to displays |
WO2014155096A1 (en) | 2013-03-28 | 2014-10-02 | Bae Systems Plc | Improvements in and relating to displays |
USD697130S1 (en) | 2013-04-02 | 2014-01-07 | Pulzit AB | Sports glasses |
WO2014172252A1 (en) * | 2013-04-15 | 2014-10-23 | Kent State University | Patterned liquid crystal alignment using ink-jet printed nanoparticles and use thereof to produce patterned, electro-optically addressable devices; ink-jet printable compositions |
US9674413B1 (en) | 2013-04-17 | 2017-06-06 | Rockwell Collins, Inc. | Vision system and method having improved performance and solar mitigation |
USD726180S1 (en) | 2013-04-18 | 2015-04-07 | Vuzix Corporation | Video eyewear device |
USD694311S1 (en) | 2013-04-22 | 2013-11-26 | Samsung Electronic Co., Ltd. | Earphone glasses |
WO2014176695A1 (en) | 2013-04-30 | 2014-11-06 | Lensvector Inc. | Reprogrammable tuneable liquid crystal lens intraocular implant and methods therefor |
US9488836B2 (en) | 2013-05-02 | 2016-11-08 | Microsoft Technology Licensing, Llc | Spherical interface for binocular display |
CA151094S (en) | 2013-05-10 | 2014-03-31 | Recon Instr Inc | Glasses with heads-up display and modules |
WO2014188149A1 (en) | 2013-05-20 | 2014-11-27 | Milan Momcilo Popovich | Holographic waveguide eye tracker |
DE102013209436A1 (en) | 2013-05-22 | 2014-11-27 | Robert Bosch Gmbh | Apparatus and method for generating a lighting pattern |
US9740030B2 (en) | 2013-05-23 | 2017-08-22 | Omnivision Technologies, Inc. | Near-eye display systems, devices and methods |
USD701206S1 (en) | 2013-06-04 | 2014-03-18 | Oculus VR, Inc. | Virtual reality headset |
US9639985B2 (en) | 2013-06-24 | 2017-05-02 | Microsoft Technology Licensing, Llc | Active binocular alignment for near eye displays |
US20140375542A1 (en) | 2013-06-25 | 2014-12-25 | Steve Robbins | Adjusting a near-eye display device |
US10228561B2 (en) | 2013-06-25 | 2019-03-12 | Microsoft Technology Licensing, Llc | Eye-tracking system using a freeform prism and gaze-detection light |
US9176324B1 (en) | 2013-06-25 | 2015-11-03 | Rockwell Collins, Inc. | Enhanced-image presentation system, device, and method |
US9625723B2 (en) | 2013-06-25 | 2017-04-18 | Microsoft Technology Licensing, Llc | Eye-tracking system using a freeform prism |
US8913865B1 (en) | 2013-06-27 | 2014-12-16 | Microsoft Corporation | Waveguide including light turning gaps |
US9664905B2 (en) | 2013-06-28 | 2017-05-30 | Microsoft Technology Licensing, Llc | Display efficiency optimization by color filtering |
ITTO20130541A1 (en) | 2013-06-28 | 2014-12-29 | St Microelectronics Srl | SEMICONDUCTOR DEVICE INTEGRATING A RESISTIVE PARTNER AND PROCESS OF MANUFACTURING A SEMICONDUCTOR DEVICE |
US9754507B1 (en) | 2013-07-02 | 2017-09-05 | Rockwell Collins, Inc. | Virtual/live hybrid behavior to mitigate range and behavior constraints |
WO2015006784A2 (en) | 2013-07-12 | 2015-01-15 | Magic Leap, Inc. | Planar waveguide apparatus with diffraction element(s) and system employing same |
US10228242B2 (en) | 2013-07-12 | 2019-03-12 | Magic Leap, Inc. | Method and system for determining user input based on gesture |
US10345903B2 (en) | 2013-07-30 | 2019-07-09 | Microsoft Technology Licensing, Llc | Feedback for optic positioning in display devices |
WO2015016844A1 (en) | 2013-07-30 | 2015-02-05 | Leia Inc. | Multibeam diffraction grating-based backlighting |
US9727772B2 (en) | 2013-07-31 | 2017-08-08 | Digilens, Inc. | Method and apparatus for contact image sensing |
JP6131766B2 (en) | 2013-08-06 | 2017-05-24 | 株式会社デンソー | Head-up display device for vehicle |
JP6232863B2 (en) | 2013-09-06 | 2017-11-22 | セイコーエプソン株式会社 | Optical device and image display apparatus |
US9785231B1 (en) | 2013-09-26 | 2017-10-10 | Rockwell Collins, Inc. | Head worn display integrity monitor system and methods |
US9244281B1 (en) | 2013-09-26 | 2016-01-26 | Rockwell Collins, Inc. | Display system and method using a detached combiner |
US9164290B2 (en) | 2013-11-06 | 2015-10-20 | Microsoft Corporation | Grating configurations for a tiled waveguide display |
DE102013223964B3 (en) | 2013-11-22 | 2015-05-13 | Carl Zeiss Ag | Imaging optics and display device with such imaging optics |
CN107315249B (en) | 2013-11-27 | 2021-08-17 | 奇跃公司 | Virtual and augmented reality systems and methods |
US9857591B2 (en) | 2014-05-30 | 2018-01-02 | Magic Leap, Inc. | Methods and system for creating focal planes in virtual and augmented reality |
US9551468B2 (en) | 2013-12-10 | 2017-01-24 | Gary W. Jones | Inverse visible spectrum light and broad spectrum light source for enhanced vision |
US20150167868A1 (en) | 2013-12-17 | 2015-06-18 | Scott Boncha | Maple sap vacuum collection systems with chew proof tubing |
KR20150072151A (en) | 2013-12-19 | 2015-06-29 | 한국전자통신연구원 | Hologram printing apparatus and method for recording of holographic elements images using spatial light modulator |
WO2015091282A1 (en) | 2013-12-19 | 2015-06-25 | Bae Systems Plc | Improvements in and relating to waveguides |
WO2015091277A1 (en) | 2013-12-19 | 2015-06-25 | Bae Systems Plc | Improvements in and relating to waveguides |
US9804316B2 (en) | 2013-12-20 | 2017-10-31 | Apple Inc. | Display having backlight with narrowband collimated light sources |
US9459451B2 (en) | 2013-12-26 | 2016-10-04 | Microsoft Technology Licensing, Llc | Eye tracking apparatus, method and system |
WO2015114743A1 (en) | 2014-01-29 | 2015-08-06 | 日立コンシューマエレクトロニクス株式会社 | Optical information device and optical information processing method |
US9671612B2 (en) | 2014-01-29 | 2017-06-06 | Google Inc. | Dynamic lens for head mounted display |
US9519089B1 (en) | 2014-01-30 | 2016-12-13 | Rockwell Collins, Inc. | High performance volume phase gratings |
CN111552079B (en) | 2014-01-31 | 2022-04-15 | 奇跃公司 | Multi-focus display system and method |
USD752129S1 (en) | 2014-02-19 | 2016-03-22 | Lg Electroincs Inc. | Frame to fix portable electronic device |
CN103777282A (en) | 2014-02-26 | 2014-05-07 | 华中科技大学 | Optical grating coupler and optical signal coupling method |
US10203762B2 (en) | 2014-03-11 | 2019-02-12 | Magic Leap, Inc. | Methods and systems for creating virtual and augmented reality |
US9762895B1 (en) | 2014-03-11 | 2017-09-12 | Rockwell Collins, Inc. | Dual simultaneous image presentation for a three-dimensional aviation display |
JP2015172713A (en) | 2014-03-12 | 2015-10-01 | オリンパス株式会社 | display device |
JP6201836B2 (en) | 2014-03-14 | 2017-09-27 | ソニー株式会社 | Optical device and method for assembling the same, hologram diffraction grating, display device and alignment device |
WO2015145119A1 (en) | 2014-03-24 | 2015-10-01 | Wave Optics Ltd | Display system |
US9244280B1 (en) | 2014-03-25 | 2016-01-26 | Rockwell Collins, Inc. | Near eye display system and method for display enhancement or redundancy |
USD725102S1 (en) | 2014-03-27 | 2015-03-24 | Lg Electronics Inc. | Head mounted display device |
US10048647B2 (en) | 2014-03-27 | 2018-08-14 | Microsoft Technology Licensing, Llc | Optical waveguide including spatially-varying volume hologram |
USD754782S1 (en) | 2014-05-16 | 2016-04-26 | Kopin Corporation | Eyewear viewing device |
JP1511166S (en) | 2014-05-21 | 2014-11-10 | ||
CA3124368C (en) | 2014-05-30 | 2023-04-25 | Magic Leap, Inc. | Methods and systems for generating virtual content display with a virtual or augmented reality apparatus |
USD751551S1 (en) | 2014-06-06 | 2016-03-15 | Alpha Primitus, Inc. | Pair of temple arms for an eyeglass frame with mount |
TWD183013S (en) | 2014-06-24 | 2017-05-11 | 谷歌公司 | Wearable hinged display device |
TWI540401B (en) | 2014-06-26 | 2016-07-01 | 雷亞有限公司 | Multiview 3d wrist watch and method for generating a 3d time view in multiview 3d wrist watch |
WO2016010289A1 (en) | 2014-07-15 | 2016-01-21 | Samsung Electronics Co., Ltd. | Holographic see-through optical device, stereoscopic imaging system, and multimedia head mounted system |
CN104076424A (en) | 2014-07-28 | 2014-10-01 | 上海交通大学 | Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof |
JP2016030503A (en) | 2014-07-29 | 2016-03-07 | 日本精機株式会社 | Head-up display device |
US9557466B2 (en) | 2014-07-30 | 2017-01-31 | Leia, Inc | Multibeam diffraction grating-based color backlighting |
WO2016018314A1 (en) | 2014-07-30 | 2016-02-04 | Leia Inc. | Multibeam diffraction grating-based color backlighting |
GB2529003B (en) | 2014-08-03 | 2020-08-26 | Wave Optics Ltd | Optical device |
US10359736B2 (en) | 2014-08-08 | 2019-07-23 | Digilens Inc. | Method for holographic mastering and replication |
US9377623B2 (en) | 2014-08-11 | 2016-06-28 | Microsoft Technology Licensing, Llc | Waveguide eye tracking employing volume Bragg grating |
US9678345B1 (en) | 2014-08-15 | 2017-06-13 | Rockwell Collins, Inc. | Dynamic vergence correction in binocular displays |
US9733475B1 (en) | 2014-09-08 | 2017-08-15 | Rockwell Collins, Inc. | Curved waveguide combiner for head-mounted and helmet-mounted displays (HMDS), a collimated virtual window, or a head up display (HUD) |
US20160077338A1 (en) | 2014-09-16 | 2016-03-17 | Steven John Robbins | Compact Projection Light Engine For A Diffractive Waveguide Display |
US10241330B2 (en) | 2014-09-19 | 2019-03-26 | Digilens, Inc. | Method and apparatus for generating input images for holographic waveguide displays |
USD746896S1 (en) | 2014-09-23 | 2016-01-05 | Costa Del Mar, Inc. | Eyeglasses |
US9494799B2 (en) | 2014-09-24 | 2016-11-15 | Microsoft Technology Licensing, Llc | Waveguide eye tracking employing switchable diffraction gratings |
US9715110B1 (en) | 2014-09-25 | 2017-07-25 | Rockwell Collins, Inc. | Automotive head up display (HUD) |
WO2016046514A1 (en) | 2014-09-26 | 2016-03-31 | LOKOVIC, Kimberly, Sun | Holographic waveguide opticaltracker |
CA2962899C (en) | 2014-09-29 | 2022-10-04 | Robert Dale Tekolste | Architectures and methods for outputting different wavelength light out of waveguides |
WO2016069606A1 (en) | 2014-10-27 | 2016-05-06 | Wichita State University | Lens mount for a wearable mobile device |
JP2016085430A (en) | 2014-10-29 | 2016-05-19 | セイコーエプソン株式会社 | Virtual image display device |
USD827641S1 (en) | 2014-12-16 | 2018-09-04 | Sony Corporation | Wearable media player |
IL236491B (en) | 2014-12-25 | 2020-11-30 | Lumus Ltd | A method for fabricating substrate-guided optical device |
ES2959422T3 (en) | 2015-01-10 | 2024-02-26 | Leia Inc | Network coupled light guide |
JP6567058B2 (en) | 2015-01-10 | 2019-08-28 | レイア、インコーポレイテッドLeia Inc. | 2D / 3D (2D / 3D) switchable display backlight and electronic display |
ES2912883T3 (en) | 2015-01-10 | 2022-05-30 | Leia Inc | Multi-beam grid-based backlighting and an electronic display method of operation |
JP6824171B2 (en) | 2015-01-10 | 2021-02-10 | レイア、インコーポレイテッドLeia Inc. | Grating-based back illumination with controlled diffraction coupling efficiency |
WO2016113533A2 (en) | 2015-01-12 | 2016-07-21 | Milan Momcilo Popovich | Holographic waveguide light field displays |
CN107873086B (en) | 2015-01-12 | 2020-03-20 | 迪吉伦斯公司 | Environmentally isolated waveguide display |
ES2803583T3 (en) | 2015-01-19 | 2021-01-28 | Leia Inc | Unidirectional grating-based backlight employing a reflective island |
US10330777B2 (en) | 2015-01-20 | 2019-06-25 | Digilens Inc. | Holographic waveguide lidar |
WO2016122679A1 (en) | 2015-01-28 | 2016-08-04 | Leia Inc. | Three-dimensional (3d) electronic display |
US10018844B2 (en) | 2015-02-09 | 2018-07-10 | Microsoft Technology Licensing, Llc | Wearable image display system |
US9429692B1 (en) | 2015-02-09 | 2016-08-30 | Microsoft Technology Licensing, Llc | Optical components |
US9513480B2 (en) | 2015-02-09 | 2016-12-06 | Microsoft Technology Licensing, Llc | Waveguide |
US9372347B1 (en) | 2015-02-09 | 2016-06-21 | Microsoft Technology Licensing, Llc | Display system |
US9535253B2 (en) | 2015-02-09 | 2017-01-03 | Microsoft Technology Licensing, Llc | Display system |
US9423360B1 (en) | 2015-02-09 | 2016-08-23 | Microsoft Technology Licensing, Llc | Optical components |
US9632226B2 (en) | 2015-02-12 | 2017-04-25 | Digilens Inc. | Waveguide grating device |
US20180246354A1 (en) | 2015-02-23 | 2018-08-30 | Digilens, Inc. | Electrically focus-tunable lens |
US10088689B2 (en) | 2015-03-13 | 2018-10-02 | Microsoft Technology Licensing, Llc | Light engine with lenticular microlenslet arrays |
US10459145B2 (en) | 2015-03-16 | 2019-10-29 | Digilens Inc. | Waveguide device incorporating a light pipe |
WO2016153879A1 (en) | 2015-03-20 | 2016-09-29 | Magic Leap, Inc. | Light combiner for augmented reality display systems |
US10591756B2 (en) | 2015-03-31 | 2020-03-17 | Digilens Inc. | Method and apparatus for contact image sensing |
EP3295668A1 (en) | 2015-05-08 | 2018-03-21 | BAE Systems PLC | Improvements in and relating to displays |
WO2016183537A1 (en) | 2015-05-14 | 2016-11-17 | Cross Match Technologies, Inc. | Handheld biometric scanner device |
US10690826B2 (en) * | 2015-06-15 | 2020-06-23 | Magic Leap, Inc. | Virtual and augmented reality systems and methods |
US10670862B2 (en) | 2015-07-02 | 2020-06-02 | Microsoft Technology Licensing, Llc | Diffractive optical elements with asymmetric profiles |
US10254536B2 (en) | 2015-07-20 | 2019-04-09 | Magic Leap, Inc. | Collimating fiber scanner design with inward pointing angles in virtual/augmented reality system |
US9541763B1 (en) | 2015-07-29 | 2017-01-10 | Rockwell Collins, Inc. | Active HUD alignment |
US9864208B2 (en) | 2015-07-30 | 2018-01-09 | Microsoft Technology Licensing, Llc | Diffractive optical elements with varying direction for depth modulation |
US10038840B2 (en) | 2015-07-30 | 2018-07-31 | Microsoft Technology Licensing, Llc | Diffractive optical element using crossed grating for pupil expansion |
US9791694B1 (en) | 2015-08-07 | 2017-10-17 | Rockwell Collins, Inc. | Transparent film display system for vehicles |
US10180520B2 (en) | 2015-08-24 | 2019-01-15 | Akonia Holographics, Llc | Skew mirrors, methods of use, and methods of manufacture |
WO2017060665A1 (en) | 2015-10-05 | 2017-04-13 | Milan Momcilo Popovich | Waveguide display |
US10429645B2 (en) | 2015-10-07 | 2019-10-01 | Microsoft Technology Licensing, Llc | Diffractive optical element with integrated in-coupling, exit pupil expansion, and out-coupling |
US10067346B2 (en) | 2015-10-23 | 2018-09-04 | Microsoft Technology Licensing, Llc | Holographic display |
US9946072B2 (en) | 2015-10-29 | 2018-04-17 | Microsoft Technology Licensing, Llc | Diffractive optical element with uncoupled grating structures |
US11231544B2 (en) | 2015-11-06 | 2022-01-25 | Magic Leap, Inc. | Metasurfaces for redirecting light and methods for fabricating |
US10359627B2 (en) | 2015-11-10 | 2019-07-23 | Microsoft Technology Licensing, Llc | Waveguide coatings or substrates to improve intensity distributions having adjacent planar optical component separate from an input, output, or intermediate coupler |
US9791696B2 (en) | 2015-11-10 | 2017-10-17 | Microsoft Technology Licensing, Llc | Waveguide gratings to improve intensity distributions |
US9915825B2 (en) | 2015-11-10 | 2018-03-13 | Microsoft Technology Licensing, Llc | Waveguides with embedded components to improve intensity distributions |
WO2017094129A1 (en) | 2015-12-02 | 2017-06-08 | 株式会社日立製作所 | Holographic optical information reproducing device |
US10558043B2 (en) | 2015-12-02 | 2020-02-11 | Rockwell Collins, Inc. | Worn display using a peripheral view |
US9800607B2 (en) | 2015-12-21 | 2017-10-24 | Bank Of America Corporation | System for determining effectiveness and allocation of information security technologies |
US10038710B2 (en) | 2015-12-22 | 2018-07-31 | Sap Se | Efficient identification of log events in enterprise threat detection |
USD793468S1 (en) | 2016-01-04 | 2017-08-01 | Garmin Switzerland Gmbh | Display device |
USD795866S1 (en) | 2016-01-06 | 2017-08-29 | Vuzix Corporation | Monocular smart glasses |
WO2017120320A1 (en) | 2016-01-06 | 2017-07-13 | Vuzix Corporation | Two channel imaging light guide with dichroic reflectors |
USD795865S1 (en) | 2016-01-06 | 2017-08-29 | Vuzix Corporation | Monocular smart glasses |
CN106960661B (en) | 2016-01-08 | 2019-06-21 | 京东方科技集团股份有限公司 | A kind of 3D display device and its driving method |
CN109073889B (en) | 2016-02-04 | 2021-04-27 | 迪吉伦斯公司 | Holographic waveguide optical tracker |
US9874931B1 (en) | 2016-02-22 | 2018-01-23 | Rockwell Collins, Inc. | Head-tracking system and method |
US10540007B2 (en) | 2016-03-04 | 2020-01-21 | Rockwell Collins, Inc. | Systems and methods for delivering imagery to head-worn display systems |
WO2017162999A1 (en) | 2016-03-24 | 2017-09-28 | Popovich Milan Momcilo | Method and apparatus for providing a polarization selective holographic waveguide device |
JP6734933B2 (en) | 2016-04-11 | 2020-08-05 | ディジレンズ インコーポレイテッド | Holographic Waveguide Device for Structured Light Projection |
CN109415630A (en) | 2016-04-13 | 2019-03-01 | 日东电工株式会社 | Liquid-crystal composition, mixture, element and tunable light device |
US9791703B1 (en) | 2016-04-13 | 2017-10-17 | Microsoft Technology Licensing, Llc | Waveguides with extended field of view |
US10025093B2 (en) | 2016-04-13 | 2018-07-17 | Microsoft Technology Licensing, Llc | Waveguide-based displays with exit pupil expander |
JP2017194547A (en) | 2016-04-20 | 2017-10-26 | コニカミノルタ株式会社 | Method of manufacturing holographic optical element, and exposure optical devices |
KR102315190B1 (en) | 2016-04-21 | 2021-10-19 | 배 시스템즈 피엘시 | Display with meta-material coated waveguide |
GB201609027D0 (en) | 2016-05-23 | 2016-07-06 | Bae Systems Plc | Waveguide manufacturing method |
GB201609026D0 (en) | 2016-05-23 | 2016-07-06 | Bae Systems Plc | Waveguide manufacturing method |
GB2550958B (en) | 2016-06-03 | 2022-02-23 | Bae Systems Plc | Waveguide structure |
USD840454S1 (en) | 2016-07-08 | 2019-02-12 | Rockwell Collins, Inc. | Head worn display wave-guide assembly |
CN106226854B (en) | 2016-09-21 | 2018-08-17 | 清华大学深圳研究生院 | A kind of producing device of holographic grating array |
KR102646789B1 (en) | 2016-09-22 | 2024-03-13 | 삼성전자주식회사 | Directional backlight unit and three-dimensional image display apparatus including the same |
CA3035787C (en) | 2016-10-05 | 2021-01-12 | Leia Inc. | Mode-selectable backlight, method, and display employing directional scattering features |
WO2018094292A1 (en) | 2016-11-17 | 2018-05-24 | Akonia Holographics Llc | Hologram recording systems and optical recording cells |
GB2556938B (en) | 2016-11-28 | 2022-09-07 | Bae Systems Plc | Multiple waveguide structure for colour displays |
WO2018102834A2 (en) | 2016-12-02 | 2018-06-07 | Digilens, Inc. | Waveguide device with uniform output illumination |
CN106848835B (en) | 2016-12-22 | 2020-04-28 | 华中科技大学 | DFB laser based on surface grating |
WO2018129398A1 (en) | 2017-01-05 | 2018-07-12 | Digilens, Inc. | Wearable heads up displays |
US10295824B2 (en) | 2017-01-26 | 2019-05-21 | Rockwell Collins, Inc. | Head up display with an angled light pipe |
KR20230173212A (en) | 2017-01-26 | 2023-12-26 | 디지렌즈 인코포레이티드. | Waveguide device with uniform output illumination |
US11460694B2 (en) | 2017-02-14 | 2022-10-04 | Snap Inc. | Waveguide structure |
US11054581B2 (en) | 2017-03-01 | 2021-07-06 | Akonia Holographics Llc | Ducted pupil expansion |
US10613268B1 (en) | 2017-03-07 | 2020-04-07 | Facebook Technologies, Llc | High refractive index gratings for waveguide displays manufactured by self-aligned stacked process |
IL269085B2 (en) | 2017-03-21 | 2023-12-01 | Magic Leap Inc | Stacked waveguides having different diffraction gratings for combined field of view |
CN106950744B (en) | 2017-04-26 | 2019-07-19 | 华中科技大学 | A kind of holographic polymer dispersed liquid crystal grating and preparation method thereof |
DE102017110246A1 (en) | 2017-05-11 | 2018-11-15 | Hettich Franke Gmbh & Co. Kg | Swivel fitting and furniture |
JP2018197838A (en) | 2017-05-25 | 2018-12-13 | コニカミノルタ株式会社 | Volume hologram recording medium |
WO2019046649A1 (en) | 2017-08-30 | 2019-03-07 | Digilens, Inc. | Methods and apparatus for compensating image distortion and illumination nonuniform ity in a waveguide |
AU201811384S (en) | 2017-09-08 | 2018-05-11 | Bae Systems Plc | Headwear optical articles |
US10569449B1 (en) | 2017-09-13 | 2020-02-25 | Facebook Technologies, Llc | Nanoimprint lithography system and method |
US20190094549A1 (en) | 2017-09-28 | 2019-03-28 | Thalmic Labs Inc. | Systems, devices, and methods for waveguide-based eyebox expansion in wearable heads-up displays |
JP7399084B2 (en) | 2017-10-16 | 2023-12-15 | ディジレンズ インコーポレイテッド | System and method for doubling the image resolution of pixelated displays |
WO2019077307A1 (en) | 2017-10-19 | 2019-04-25 | Bae Systems Plc | Axially asymmetric image source for head-up displays |
USD872170S1 (en) | 2017-11-09 | 2020-01-07 | OxSight Limited | Glasses |
US10983257B1 (en) | 2017-11-21 | 2021-04-20 | Facebook Technologies, Llc | Fabrication of self-aligned grating elements with high refractive index for waveguide displays |
JP1611400S (en) | 2017-11-24 | 2021-08-16 | ||
JP7073690B2 (en) | 2017-11-29 | 2022-05-24 | セイコーエプソン株式会社 | Recording device |
JP7155267B2 (en) | 2017-12-21 | 2022-10-18 | ビ-エイイ- システムズ パブリック リミテッド カンパニ- | wearable device |
FI129400B (en) | 2017-12-22 | 2022-01-31 | Dispelix Oy | Diffractive waveguide element and diffractive waveguide display |
FI129113B (en) | 2017-12-22 | 2021-07-15 | Dispelix Oy | Waveguide display and display element with novel grating configuration |
JP7404243B2 (en) | 2018-01-08 | 2023-12-25 | ディジレンズ インコーポレイテッド | Systems and methods for high-throughput recording of holographic gratings in waveguide cells |
US20190212588A1 (en) | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Systems and Methods for Manufacturing Waveguide Cells |
US20190212597A1 (en) | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Low Haze Liquid Crystal Materials |
US20190212589A1 (en) | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Liquid Crystal Materials and Formulations |
EP3710887A4 (en) | 2018-01-08 | 2021-04-28 | Digilens Inc. | Holographic material systems and waveguides incorporating low functionality monomers |
CN114721242A (en) | 2018-01-08 | 2022-07-08 | 迪吉伦斯公司 | Method for manufacturing optical waveguide |
USD859510S1 (en) | 2018-01-16 | 2019-09-10 | Costa Del Mar, Inc. | Eyeglasses |
US10823887B1 (en) | 2018-01-23 | 2020-11-03 | Facebook Technologigegs, Llc | Diffraction grating with a variable refractive index using multiple resins |
US10866426B2 (en) | 2018-02-28 | 2020-12-15 | Apple Inc. | Scanning mirror display devices |
US12038582B2 (en) | 2018-03-07 | 2024-07-16 | Snap Inc. | Waveguide structure for head up displays |
USD855687S1 (en) | 2018-03-09 | 2019-08-06 | Kopin Corporation | Eyewear viewing device |
FI129387B (en) | 2018-03-28 | 2022-01-31 | Dispelix Oy | Waveguide element |
FI129359B (en) | 2018-03-28 | 2021-12-31 | Dispelix Oy | Diffractive grating |
FI130178B (en) | 2018-03-28 | 2023-03-29 | Dispelix Oy | Waveguide element and waveguide stack for display applications |
FI128837B (en) | 2018-03-28 | 2021-01-15 | Dispelix Oy | Exit pupil expander |
US10732351B2 (en) | 2018-04-23 | 2020-08-04 | Facebook Technologies, Llc | Gratings with variable depths formed using planarization for waveguide displays |
US20190339558A1 (en) | 2018-05-07 | 2019-11-07 | Digilens Inc. | Methods and Apparatuses for Copying a Diversity of Hologram Prescriptions from a Common Master |
US10649119B2 (en) | 2018-07-16 | 2020-05-12 | Facebook Technologies, Llc | Duty cycle, depth, and surface energy control in nano fabrication |
EP3827294A4 (en) | 2018-07-24 | 2022-04-20 | Magic Leap, Inc. | Diffractive optical elements with mitigation of rebounce-induced light loss and related systems and methods |
US11402801B2 (en) | 2018-07-25 | 2022-08-02 | Digilens Inc. | Systems and methods for fabricating a multilayer optical structure |
US10578876B1 (en) | 2018-09-10 | 2020-03-03 | Facebook Technologies, Llc | Waveguide having a phase-matching region |
USD880575S1 (en) | 2018-09-25 | 2020-04-07 | Oakley, Inc. | Eyeglasses |
US11103892B1 (en) | 2018-09-25 | 2021-08-31 | Facebook Technologies, Llc | Initiated chemical vapor deposition method for forming nanovoided polymers |
JP7155815B2 (en) | 2018-09-27 | 2022-10-19 | セイコーエプソン株式会社 | head mounted display |
US11243333B1 (en) | 2018-10-24 | 2022-02-08 | Facebook Technologies, Llc | Nanovoided optical structures and corresponding systems and methods |
US10598938B1 (en) | 2018-11-09 | 2020-03-24 | Facebook Technologies, Llc | Angular selective grating coupler for waveguide display |
US10690831B2 (en) | 2018-11-20 | 2020-06-23 | Facebook Technologies, Llc | Anisotropically formed diffraction grating device |
US11340386B1 (en) | 2018-12-07 | 2022-05-24 | Facebook Technologies, Llc | Index-gradient structures with nanovoided materials and corresponding systems and methods |
US11306193B1 (en) | 2018-12-10 | 2022-04-19 | Facebook Technologies, Llc | Methods for forming ordered and disordered nanovoided composite polymers |
US11233189B2 (en) | 2018-12-11 | 2022-01-25 | Facebook Technologies, Llc | Nanovoided tunable birefringence |
US20200201042A1 (en) | 2018-12-19 | 2020-06-25 | Apple Inc. | Modular system for head-mounted device |
US11307357B2 (en) | 2018-12-28 | 2022-04-19 | Facebook Technologies, Llc | Overcoating slanted surface-relief structures using atomic layer deposition |
WO2020149956A1 (en) | 2019-01-14 | 2020-07-23 | Digilens Inc. | Holographic waveguide display with light control layer |
US11667059B2 (en) | 2019-01-31 | 2023-06-06 | Meta Platforms Technologies, Llc | Techniques for reducing surface adhesion during demolding in nanoimprint lithography |
US20200249568A1 (en) | 2019-02-05 | 2020-08-06 | Facebook Technologies, Llc | Curable formulation with high refractive index and its application in surface relief grating using nanoimprinting lithography |
EP3924759A4 (en) | 2019-02-15 | 2022-12-28 | Digilens Inc. | Methods and apparatuses for providing a holographic waveguide display using integrated gratings |
EP3927793A4 (en) | 2019-02-22 | 2022-11-02 | Digilens Inc. | Holographic polymer dispersed liquid crystal mixtures with high diffraction efficiency and low haze |
JP2022525165A (en) | 2019-03-12 | 2022-05-11 | ディジレンズ インコーポレイテッド | Holographic Waveguide Backlights and Related Manufacturing Methods |
GB2584537B (en) | 2019-04-18 | 2022-11-16 | Bae Systems Plc | Optical arrangements for displays |
US20200348519A1 (en) | 2019-05-03 | 2020-11-05 | Digilens Inc. | Waveguide Display with Wide Angle Peripheral Field of View |
US11137603B2 (en) | 2019-06-20 | 2021-10-05 | Facebook Technologies, Llc | Surface-relief grating with patterned refractive index modulation |
US11550083B2 (en) | 2019-06-26 | 2023-01-10 | Meta Platforms Technologies, Llc | Techniques for manufacturing slanted structures |
KR20220036963A (en) | 2019-07-22 | 2022-03-23 | 디지렌즈 인코포레이티드. | Systems and methods for mass fabrication of waveguides |
WO2021032983A1 (en) | 2019-08-21 | 2021-02-25 | Bae Systems Plc | Manufacture of surface relief structures |
EP4018246A1 (en) | 2019-08-21 | 2022-06-29 | BAE SYSTEMS plc | Optical waveguide |
GB2589686B (en) | 2019-09-06 | 2023-05-10 | Snap Inc | Waveguide and method for fabricating a waveguide master grating tool |
US11598919B2 (en) | 2019-10-14 | 2023-03-07 | Meta Platforms Technologies, Llc | Artificial reality system having Bragg grating |
US11428938B2 (en) | 2019-12-23 | 2022-08-30 | Meta Platforms Technologies, Llc | Switchable diffractive optical element and waveguide containing the same |
US11662584B2 (en) | 2019-12-26 | 2023-05-30 | Meta Platforms Technologies, Llc | Gradient refractive index grating for display leakage reduction |
US20210199873A1 (en) | 2019-12-26 | 2021-07-01 | Facebook Technologies, Llc | Dual-side antireflection coatings for broad angular and wavelength bands |
US20210238374A1 (en) | 2020-02-04 | 2021-08-05 | Facebook Technologies, Llc | Templated synthesis of nanovoided polymers |
US11543584B2 (en) | 2020-07-14 | 2023-01-03 | Meta Platforms Technologies, Llc | Inorganic matrix nanoimprint lithographs and methods of making thereof with reduced carbon |
US20220082739A1 (en) | 2020-09-17 | 2022-03-17 | Facebook Technologies, Llc | Techniques for manufacturing variable etch depth gratings using gray-tone lithography |
US11592681B2 (en) | 2020-09-23 | 2023-02-28 | Meta Platforms Technologies, Llc | Device including diffractive optical element |
US20220206232A1 (en) | 2020-12-30 | 2022-06-30 | Facebook Technologies, Llc | Layered waveguide fabrication by additive manufacturing |
US20220204790A1 (en) | 2020-12-31 | 2022-06-30 | Facebook Technologies, Llc | High refractive index overcoat formulation and method of use with inkjet printing |
-
2018
- 2018-11-28 US US16/203,071 patent/US20190212588A1/en not_active Abandoned
- 2018-11-28 WO PCT/US2018/062835 patent/WO2019135837A1/en unknown
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2020
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-
2024
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US10678053B2 (en) | 2009-04-27 | 2020-06-09 | Digilens Inc. | Diffractive projection apparatus |
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US11402801B2 (en) | 2018-07-25 | 2022-08-02 | Digilens Inc. | Systems and methods for fabricating a multilayer optical structure |
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JP2024083354A (en) | 2024-06-21 |
WO2019135837A1 (en) | 2019-07-11 |
EP3710876A4 (en) | 2022-02-09 |
EP3710876A1 (en) | 2020-09-23 |
JP7456929B2 (en) | 2024-03-27 |
CN111615655A (en) | 2020-09-01 |
US20210223585A1 (en) | 2021-07-22 |
CN111615655B (en) | 2023-03-21 |
KR20200104402A (en) | 2020-09-03 |
US12092914B2 (en) | 2024-09-17 |
JP2021509488A (en) | 2021-03-25 |
CN116224492A (en) | 2023-06-06 |
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