WO2005050264A2 - Variable optical arrays and variable manufacturing methods - Google Patents
Variable optical arrays and variable manufacturing methods Download PDFInfo
- Publication number
- WO2005050264A2 WO2005050264A2 PCT/US2004/039384 US2004039384W WO2005050264A2 WO 2005050264 A2 WO2005050264 A2 WO 2005050264A2 US 2004039384 W US2004039384 W US 2004039384W WO 2005050264 A2 WO2005050264 A2 WO 2005050264A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- array
- lens
- curved
- light
- film
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 238000003491 array Methods 0.000 title description 13
- 239000000463 material Substances 0.000 claims description 42
- 238000004891 communication Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 41
- 239000011324 bead Substances 0.000 description 13
- 230000008901 benefit Effects 0.000 description 12
- 239000011521 glass Substances 0.000 description 12
- 239000000725 suspension Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000004033 plastic Substances 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 9
- 238000013459 approach Methods 0.000 description 6
- 239000013590 bulk material Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 230000003466 anti-cipated effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000012780 transparent material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0966—Cylindrical lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0043—Inhomogeneous or irregular arrays, e.g. varying shape, size, height
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0232—Optical elements or arrangements associated with the device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/1462—Coatings
- H01L27/14621—Colour filter arrangements
Definitions
- the present invention relates to lens anays, methods of making lens anays, and the construction of various lens array systems.
- the invention divides the lens focusing process into two or more surfaces that incorporate multiple axial optic elements on each surface; where "axial optics" includes the use of cylindrical lenses as examples.
- axial optics includes the use of cylindrical lenses as examples.
- the lenses are cut transverse to the axis of the cylinder, the cut will expose the same contour as cross cuts made elsewhere along the lens.
- this invention is by no means limited to cylindrical lenses, they are convenient and easily understood examples of axial optics.
- this invention encompasses energies other than light (sound and radio waves, for example) the discussion herein will be limited to light because visual systems are readily familiar.
- the axial optics may be manufactured by molding, machining, or by suspended film.
- both sides of an optic may have a suspended film that is transparent. This leads to practical applications including a multi-image device, and a rear-projection screen, both of which are described in greater detail below.
- one side of the optic may use a reflective film, leading to practical applications such as a front projection screen described in greater detail below and a multi- image device of the type described in a co-pending related US patent application that is titled "Reflective Multi-Image Surface", filed on November 18, 2004.
- Figure 1A is an elevated view of a first axial optic element having a curved surface that receives light, and a flat surface where the light exits, and the exiting light is focused into a line at a focal surface.
- Figure IB is an elevated view of a second axial optic element having a flat surface that receives light, and a curved surface where the light exits, and the exiting light is focused into a line at a focal surface.
- Figure IC is an elevated view showing a physical blockage of light.
- Figure ID is an elevated view showing a partial physical blockage of light.
- Figure 2A is an elevated view of the first and second axial optic elements set perpendicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 2B is a top view of Figure 2A, wherein the first and second axial optic elements set pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 2C is a side view of Figure 2A where the first and second axial optic elements are set pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 3A is an elevated view of the first and second axial optic elements set pe ⁇ endicularly with respect to each other, oriented with flat surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 3B is a top view of Figure 3A, wherein the first and second axial optic elements set pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 3C is a side view of Figure 3A, wherein the first and second axial optic elements set pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a single focal point for light passing through both axial optic elements.
- Figure 4 is an elevated view of first and second axial optic elements disposed in a crossed relationship, oriented with the curved surfaces towards each other, wherein light is being collimated as it originates from a light source and passes through two crossed lenses.
- Figure 5 is an elevated view of an array of axial lens elements.
- Figure 6 A is an elevated view of a first array of axial lens elements, and a second anay of axial optic elements set pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other, and further illustrating a series of single focal points for light passing through both axial optic elements.
- Figure 6B is another elevated view of the arrays of axial lens elements of Figure 6B.
- Figure 6C is a top view of Figure 6A, wherein the first and second anay of axial lens elements are disposed pe ⁇ endicularly with respect to each other, oriented with curved surfaces towards each other.
- Figure 7A is an elevated view of a first anay of axial lens elements having a flat surface closest to the rounded surface of a second anay of axial lens elements, wherein the first array is oriented above and pe ⁇ endicularly with respect to the second anay, and further illustrating an elevated view of the resulting projection.
- Figure 7B is a side view of the embodiment shown in Figure 7A.
- Figure 7C is a top view of the embodiment shown in Figure 7A.
- Figure 8A is a top view of the overlapping area of first and second axial lens element arrays oriented pe ⁇ endicularly, with curved surfaces facing each other, and a hidden view of the resulting projection.
- Figure 8B is an elevated view of first and second axial lens element arrays oriented pe ⁇ endicularly as shown in Figure 8A, with curved surfaces facing each other, and an elevated view of the resulting projection.
- Figure 8C is a top view of first and second axial lens element anays oriented at a 45 degree orientation, with curved surfaces facing each other, and a hidden view of the resulting projection.
- Figure 8D is an elevated view of first and second axial lens element anays oriented at a 45 degree orientation as shown in Figure 8C, with curved surfaces facing each other, and an elevated view of the resulting projection.
- Figure 8E is a top view of a top view of first and second axial lens element arrays oriented in registry, with curved surfaces facing each other, and a hidden view of the resulting projection.
- Figure 8F is an elevated view of first and second axial lens element arrays oriented in registry as shown in Figure 8E, with curved surfaces facing each other, and an elevated view of the resulting projection.
- Figure 9A is a side view of a first curved surface for an axial optical element anay.
- Figure 9B is a side view of a second curved surface for an axial optical element array
- Figure 9C is a side view of a third curved surface with baffles for an axial optical element array.
- Figure 9D is a side view of a series of flat, apex-forming surfaces for an axial optical element array.
- Figure 9E is a side view of a series of non-uniform curved surfaces for an axial optical element array.
- Figure 10 illustrates an elevated view of a film suspended on a tool.
- Figure 11 illustrates an elevated view of a mold with external attachments.
- Figure 12 illustrates an elevated assembly view of the mold of Figure 11.
- Figure 13 illustrates a rear projection screen system using the crossed optical array of the present invention.
- Figure 14 illustrates the general concept of the class of practical application of a spatially- multiplexed image deconvolver with the respective positions of a light source, a Composite Image, a Lens Array, and two different Viewable Images within two Viewer Angular Regions, as well as example rays coming from selected Lens Source Groups.
- Figure 15 illustrates a 9-by-9 array of pixels, totaling to 81 pixels, which make up the Composite Image, and one Source Image, which is made up of nine pixels.
- Figure 16 illustrates the general characteristic of a lens when an image is placed at its focal point, the relation of the pixel placements in the Composite Image to the Viewable Image when central rays come from each of three pixels, and the anangement of the pixels within each Lens Source Group being very specific, the placement of the pixel being in accord with the characteristic of refractive optics such that its energy is sent in the same direction as the other pixels that make up the source image to be sent toward a viewer.
- Figure 17 illustrates the profile of three lenses, matched in focal length, size and location relative to the elements of the Composite Image, with each lens separating the image elements into different directions as illustrated in Figure 16.
- Figure 18 illustrates a one-dimensional lens array.
- Figure 19 illustrates a two-dimensional lens array.
- Figure 20 illustrates the basic idea of glass bead screens.
- Figure 21 illustrates the crosstalk issues associated with glass beads
- Figure 22 illustrates incoming projector light passing into the cylindrical lenses and reflecting back out through the same lenses which are backed by a specular reflector.
- Figure 23 illustrates one example of a film-suspension arrangement for creation of the closely-spaced cylindrical lens anay.
- Figure 24 illustrates the overall concept of clear film adhered with cylindrical mo ⁇ hology to bulk clear refractive fill material plus reflective film adhered cylindrical mo ⁇ hology to the opposite side of the bulk fill.
- Figure 25A illustrates a front elevated view of a typical individual cell, in which the effect of the arrangement in the invention is to produce a matrix of projection screen reflective cells with many advantages over traditional front projection screen technology, such as high-gain improved contrast and multiple imaging capabilities.
- Figure 25B illustrates a side elevated view of the cell of Figure 25A.
- Figure 25C illustrates an elevated side view of the cell of Figure 25A.
- Figure 26 illustrates a highly flexible screen where small cell size leads to a thin, flexible screen.
- Axial optics may be obtained by machining, or by molding, as described below.
- axial optics may be obtained by machining.
- a piece of optic-compatible material can be mounted onto a milling bed and fed into a cutting tool (such as a ball mill or other cutting shapes) along a continuous axis to obtain a continuous cut that is linear when examined from at least one viewing perspective.
- the milling bed can then be offset to produce a cut that is also linear when observed with the same aforementioned perspective, and is nearly parallel to the first.
- These parallel cuts produce an axial optic.
- Continuing with additional parallel cuts can produce an anay of axial optics.
- Another mechanical way to obtain axial optics is the extrusion process. An axial optic can be made via extrusion, whereas a spherical optic cannot be made via extrusion.
- the extrusion mold can be machined longitudinally, and then polished.
- the significance of this invention's use of axial optics will be recognized for the aforementioned example of one- million spherical lenses on a square-inch surface as discussion continues below and it is shown that by use of overlays of axial optics the manufacturing problems are reduced many thousand-fold.
- many techniques are suited to production of the axial optic surfaces. Included among these is fabrication of tooling to be used in replication of the appropriately surfaced pieces of material. Milling, broaching, casting, pressing, stamping, etching, vacuum forming, electroforming, and extruding are a few of the available techniques for making tooling.
- These tools can be used to fabricate the separate pieces via material addition to cavities (injection, casting, deposition, precipitation, photo-processes, extrusion, etc.), via material extraction (milling, broaching, etching, photo-processes, etc.), and via material displacement (rolling, flat pressing, stamping, melting to form, etc.).
- the present invention divides the two-axis focusing process exhibited by standard optics (camera lenses, projector lenses, microscope lenses, etc.) into two or more one-axis stages by using two or more axial optic elements with two or more of the axes set more or less crosswise to one another.
- Employing crossed axial optics in such a manner makes manufacture of lens anays much more practical and economical than with standard two-axis lens anay manufacture.
- Figures 1 and IB parallel rays of light are shown entering two lenses pe ⁇ endicularly from above.
- the cylindrical lens focuses the light into a line. That is, the effect of focusing is in one direction that is aligned with the axis of the lens cylinder.
- the light rays converge to a concentration at a specific distance from the lens in accord with various properties, including, but not limited to, the curvature of the cylinder and the refractive index of the material from which the lens is made.
- the light After the light is concentrated to a line, if it is not interrupted by a physical blockage, the light (after already having come into focus) continues by diverging away from the point, the divergence angle being consistent with the angle of the original incoming ray. On one side of the concentrated line, the light converges on it from different directions. On the other side of the concentrated line, the light diverges as it continues to travel.
- this invention includes cases wherein a physical blockage 15 and 17, in whole or in part, is used. Partial physical blockage 15 and 17 is also included in this invention. Physical blockage 15 and 17 is shown in Figures IC and ID.
- Non-limiting examples of uses of partial physical blockage 15 and 17 include the control of lens-effective apertures, the interaction of incoming light with pixels of existing images via intermediate focal planes that contain the images in a transmissive and/or reflective form, and encoding of information via spatial filtering.
- Examples of physical blockage material include, but are not limited to, photographic film, CCD video chips, and any other photosensitive material.
- partial blockage 15 and 17 may be desired.
- An example case of partial blockage material 15 and 17 is an array of color filters. These filters would be installed in the anay focal plane to make a composite picture which is the summation of a pattern of the incoming light and a pattern at the focal point of the array.
- partial blockage and full blockage 15 and 17 may refer to either the light blocking or the physical position of an element, and thus may be the result of either a somewhat transparent inte ⁇ ositioning of an element, or a fully light-blocking element in certain areas for spatial filtering, or a combination.
- first cylindrical lens 14a and second cylindrical lens 14b in Figures 1A and IB are aligned orthogonally with respect to each other, are stacked vertically, and aligned transversely to the path of incoming light, shown generally at 12, (and as shown in Figures 2A, 2B, 2C, 3A, 3B, 3C and 4), then first lens 14a focuses incoming light 12 to exit light lines 16 which forms line 18.
- the combined effect of both lenses 14a, 14b will be to focus the light to a spot 22.
- This spot 22 approximately represents the crossing point of the two exit light lines 16 associated with each of the two lenses when considered independently.
- the incoming light 12focused to spot 22 will be that which impinges an area approximately defined by the overlap area of the two cylindrical lenses.
- the crossed cylindrical lenses can operate together as a collector of light, as depicted in Figures 2A, 2B, 2C and 3A, 3B, and 3C.
- Figures 2A, 2B and 2C show the two lenses with their curvatures toward each other
- Figures 3A, 3B, and 3C show the combination with the flats toward each other.
- the example lenses need not have curvature on one side and be flat on the other.
- putting the crossed cylindrical arrays on opposite sides of the same piece of material is nearly equivalent to the anangement shown in Figure 3A, 3B, and 3C.
- the lenses need not be convex, although that is the common shape in the figures used for discussion of this invention.
- the invention may have any number of axial-optics surfaces stacked in succession, so long as that number is at least two.
- Figure 4 illustrates that the crossed lens anay can be used to collimate light as readily as it can be used to collect light.
- light 28 emanating from a light source 26, placed at the composite focal point of the two lenses 14a and 14b, is allowed to radiate towards lens 14a.
- Light 16 then exits first lens 14b and diverges and collimates.
- CoUimated light 30 exits from second lens 14a. The light that falls under the influence of the area where the two lenses overlap will be coUimated 30 more than it was when light 28 was first radiating outward from the source 26.
- Figure 5 shows that the surface on a piece of material can be provided with more than one axial optic.
- an axial lens anay 32 comprising five cylindrical lenses is shown in abutment to one another. (It is not a requirement of this invention that all the axial optics on a surface be the same in cross section as seen in Figure 9A-9E.)
- a piece of material with multiple cylindrical lenses 32a can be crossed with another piece having multiple cylindrical lenses 32b, thereby producing a two-dimensional lens array such as illustrated in Figures A, 6b, and 6C.
- the particular overlay area 20 associated with each cylindrical lens element is a collector of light that produces its own focal spot 24 using the light that falls upon that area 20.
- Figures 7A, 7B, and 7C illustrate a two-dimensional lens anay 32a, 32b where the application is a collimator of light emanating from many sources 26, each located at the focal spot 22 of the lenses 32a. 32b created by the overlap 20 of the axial optics 32a, 32b. In effect, this condition is the inverse use of the anays 32a, 32b to their use in Figures 6A, 6B and 6C.
- the axes of two sets of axial-optics 32a, 32b need not be arranged pe ⁇ endicularly with respect to one another.
- Figures 8E, and 8F show that when the axes are aligned with each other, the result is focus into a series of parallel lines, rather than focus into an array of spots.
- the sets are oriented non-parallel, as in Figures 8A-8D, focus into spots begins to take place.
- the spots are not symmetric, as they are with the sets oriented transverse to each other.
- FIGS 9A, 9B, 9C, 9D, and 9E Some example cross sections for the axial optics applicable to this invention are shown in Figures 9A, 9B, 9C, 9D, and 9E. These represent some key shaping concepts, though the figure by no means is an exhaustive representation of all the possible embodiments of this invention. Also encompassed by this invention are configurations wherein the axial optics are imbedded within the pieces of materials, such as with linear cavities in plastic, glass or other suitably transparent materials. Additionally, where appropriate, liquids and gases of various refractive and transparency qualities can be flowed within the system to alter the focusing, color, and other characteristics of a lens anay.
- the current preferred embodiment which has been built and tested by the inventor, is a design wherein two pieces of axial optics are made by casting resin with axial lenses spaced 1/16" apart and having a focal length of 1/8". The two pieces, both of which use axial optics that are cylindrically shaped, are then crossed, as per Figures 2A, 2b, and 2C or Figures 3A, 3B, and 3C, to produce an array as depicted in Figures 6A, 6B, and 6C and Figures 7A, 7B, and 7C.
- this particular embodiment is currently preferred, the invention is not limited to the shapes, sizes, or manufacturing techniques used in this example.
- An extremely valuable feature of the invention is that it allows cost effective manufacture of two-dimensional lens anays, and facilitates manufacture of lens anays of a spatial density that would be impractical, if not impossible, using prior optical manufacturing methods. Also, in several embodiments of this invention, the optical characteristics can be readily changed even after fabrication. Applications of the resultant arrays include, but are not limited to, the following optical examples: Optical computing, communication, and coding; rear-screen and front- screen projection for theaters, home entertainment and schools; advertisement signage and scoreboards; "eyeglasses" for military heads-up displays and for virtual reality systems to display a different three-dimensional image for each eye by collimating selected pixels; along with others. As previously indicated this invention is not limited to optical applications. This invention is also applicable to other regions of the electromagnetic spectrum, as well as to acoustic and other mechanical energies.
- a tool 134 is created by making a series of longitudinal cuts to create thin walls 102 spaced at a distance D of preferably 1mm. Tool 134 is shown with v-shaped longitudinal cuts, but can also have square cuts. Holes (not shown) or even grooves, may be placed along the bottom of the cuts to provide communication for a differential pressure V.
- a sheet of film 104, transparent or reflective, is placed over the walls 102.
- differential pressure V is applied via the holes (not shown) between the walls 102 to pull the film 104, and a curved axial optic 110 is formed. It is very important to understand that there is no further polishing of the optic that is required in order to have an optical quality surface.
- a polymer 112 may be poured behind the curved axial optic 110, and a permanent axial optic is created, having a light focusing ability as shown in Figure 2A.
- a prefened polymer material may be obtained from Applied Poleramics, Inco ⁇ orated, of Benicia, California. Prefened specific materials from Applied Poleramics are 266 epoxy and AU16 polyurethane, as well as EFM15 and EFM 18 phenolics.
- the outside of the optic may be coated for protection of the optic surface, such as, for example, a thin acrylic coating, or a polyethylene coating to prevent oxidation, abrasion or other surface degradation.
- a thin acrylic coating or a polyethylene coating to prevent oxidation, abrasion or other surface degradation.
- Such coatings may be purchased from Peabody Laboratories, Inc. located at 1901 S. 54 th Street, Philadelphia, PA 19143, and sold under the trade name PERMALAC.
- the differential pressure may be varied to vary the curvature of the axial optic.
- a transparent tool 100 may be used with film 104.
- the curved axial optic is continuously variable in curvature depending upon varying level of differential pressure.
- any film 104 may be used such as acetate, polyethylene, polypropylene, polycarbonate, or acrylic where the thickness is preferably between .25 mils and 1 mil.
- the space between the films 104 may be filled with a plastic (the term "plastic” is intended to be used genetically in its broadest sense and not meant to be limited to “polymer”).
- a plastic the term "plastic” is intended to be used genetically in its broadest sense and not meant to be limited to “polymer”
- One prefened plastic is the epoxy referred to above, which because of its low viscosity, pours like water between the films where it is then heated and cured.
- This approach is used in reference to Figures 11 and 12.
- a mold is shown generally at 116. Mold 116 has as supporting structure leg supports 118, base support 120, stabilization plate 122, upright supports 124, and spacing block 126. Hinges 128 permit easy access to the inner cavity by permitting laterally swinging and removable hinged doors 130.
- mold 116 has doors 130, radiator 131, radiator gasket 132, vacuum bed 134, and spacing gasket 136.
- Tool 100 is placed within vacuum bed 134, on each side.
- a temperature sensor array 140 is provided on the exterior of the mold 116, as are external heating sources 142 (fixed onto doors 130 using a high temperature adhesive backing), high temperature fluid inlet hoses 144, high temperature fluid outlet hoses 146, and vacuum hoses 148.
- film 104 is placed on each of two tools 100 on each side of vacuum bed 134. Doors 130 are swung shut, and the assembly is latched 150.
- Differential pressure is asserted through vacuum hoses 140 to pull and suspend film 104 into a curved axial optic shape. Both films are pulled away from each other. It should be noted that pressure may in asserted instead of vacuum through vacuum hoses 140. Then, after the plastic, preferably epoxy is poured and cured, a final curved axial optic solid is the result, curved at the outside and sharing a common center.
- Material sheets can be flexible or rigid to varying degrees as appropriate to an application. The sheets can be combined with the use of gravity, adhesives, solvents, vacuum, fusion, pressure, mechanical devices, and other options. Edges of the stacked combinations can be left open or sealed.
- the resultant anay assemblies can be comprised of two or more axially-produced optical layers, with each layer being the same or different in figure, finish, material, or other characteristic suited to the application.
- the resultant array assemblies can be used by themselves, or in conjunction with mechanical, electronic, or other optical systems.
- the resultant lens anay may be used with variable axial optic widths in a crossed anay arrangement to conect for astigmatism, provide nano-scale light effect, make adjustments on the order of magnitude of fractions of millimeters per lens, and can collimate on a pixel-by-pixel level.
- a very high quality rear projection screen may be manufactured.
- a resultant anay assembly can be used to form a rear projection screen 151.
- a rear projection source 152 projects light through rear projection screen 151 which is a crossed optical array, resulting in a viewable image 154.
- II.C. SPATIALLY MULTIPLEXED EMAGE DECONVOLVER APPLECATIONS As a third class of practical application of the resultant array assembly using transparent films, a spatially multiplexed image deconvolver (a decoder) may be created.
- a Source Image is an individual image whose elements are convolved (intermingled) with elements from other Source Images to form a Composite Image.
- the viewer sees a specific deconvolved Source Image within a certain range of angles during operation of this invention, the specific image being in accord with the invention's selectable parameters.
- the invention is most striking when it inco ⁇ orates several Source Images, each viewable at different angles, but is capable of functioning with just one Source Image.
- An element, or pixel is a "piece" of a Source Image, which is located within a Lens Source Group of the Composite Image, as shown in Figure 15.
- the Composite Image also called the Multiplexed Image, is a convolution of all of the Source Images in such a way that the Lens Anay in this invention will allow for deconvolving each Source Image, that is, sorting out, for the viewer, the pixels of each Source Image such that a coherent image is seen.
- the term also refers to the physical Composite Image, which may be made of various materials, and is located behind the Lens Anay.
- the Composite Image without the aid of the deconvolution provided by the invention, looks to the eye like an incomprehensible collection of random spots.
- a Lens Source Group is the group of pixels behind a single lens within the Lens Anay. There are generally as many Lens Source Groups as there are individual lenses in the Lens Anay.
- a Lens Source Group includes at least one pixel from each Source Image.
- the Lens Array is the array of lenses that are placed in front of the Composite Image. Each Lens of the Array has beneath it a Lens Source Group that contains conesponding pixels from the Source Images.
- a Viewable Image is a Source Image as it is seen by a viewer. This image is one of the Source Images, after it has been deconvolved from the other Source Images in the Composite Image by the action of the Lens Anay.
- Viewer Angular Region refers to the angular range, with respect to the invention, in which a viewer could observe a deconvolved Source Image. That is, it is the region where a Viewable Image can be seen.
- Figure 14 the general concept of this class of practical application of the invention is shown. It shows the respective positions of a light source 152, a Composite Image 150, a Lens Anay 156, and two different Viewable Images 154 within two Viewer Angular Regions 158, as well as example rays coming from selected Lens Source Groups.
- Figure 15A shows a 9-by-9 anay of pixels, totaling to 81 pixels la-9a, lb-9b, lc-9c, ld-9d, le-9e, lf-9f, lg-9g, lh-9h, and li-9i, which make up the Composite Image shown generally at 200.
- the Figure also shows one Source Image 220, which is made up of nine pixels la-9i.
- Each pixel la-9i in the Composite Image is a pixel from one of nine different Source Images la-9i.
- the pixels la-9i from the Source Images are mapped onto the Composite Emage 200 in a specific arrangement.
- the Composite Image 200 in the Figure is made up of an array of nine Lens Source Groups 210.
- Each pixel la-9i in each Source Emage 220 is labeled with a number and a lower-case letter.
- the number identifies a pixel as belonging to a unique Source Image 220, and the letter designates the position of each pixel within the Source Image 220. That is, pixels having the same lower-case letter belong to the same Source Group 210, whereas pixels having the same number belong to the same Source Image 220. For example, all pixels designated with the integer "1" belong to Source Image 1. All pixels designated with the lower-case letter "a" belong to Lens Source Group "a”. Pixels 222 are placed into specific Lens Source Groups 210 to achieve coherence of the Source Image 220 once it is deconvolved into the Viewable Image 200.
- Figure 16 shows the relation of the pixel placements in the Composite Image 200 to the Viewable Image 220.
- the arrangement of the Lens Source Groups 210 within the Composite Image 220 is determined by the letter designation of the pixels that it contains.
- the arrangement of the Lens Source Groups 210 must correspond to the arrangement of the pixels within the Source Images 220. That is, the relative location of a Lens Source Group 210 within the Composite Image 200 must conespond to the relative location of the pixels la-9i within their Source Images 220.
- the Lens Source Group 210 that contains that pixel la must be located in the upper left hand comer of the Composite Image 200.
- the Lens Source Group 210 containing pixel la in the Composite Image 200 must be placed in the upper left hand co er of the Composite Image 200 because the location of pixel la in Source Image la is in the upper left hand comer.
- the anangement of the pixels within each Lens Source Group 210 is very specific, the placement of the pixel being in accord with the characteristic of refractive optics such that its energy is sent in the same direction as the other pixels that make up the source image to be sent toward a viewer, as shown in Figures 16 and 17.
- a system that contained five Source Images could have a Source Image with twenty pixels, and the remaining four Source Images could have varying smaller numbers of pixels.
- the Composite Image would have twenty Lens Source Groups, but each Source Group would not necessarily contain a pixel from the Source Images with lower resolutions.
- the number of pixels within each Source Group will vary because the number will depend on the desired Angular Ranges of the Viewable Images. Thus it is up to the designers to use in their art. Additionally, the pixels within the Lens Source Groups do not need to be the same size. To make a Viewable Image have a larger Viewer Angular Region, the pixels can be made corresponding larger than other pixels (this will reduce the total Angular Region available for the other Viewable Images).
- the Composite Emage 200 can be applied to materials that are opaque, transparent, neutral in color, colored, polarized, unpolarized, or any combination of these.
- the Composite Image 200 can also be projected onto a rear projection screen.
- An anay of lenses is used to achieve the deconvolution of the interspersed pixels such that distinguishable images are projected toward a viewer.
- Figure 16 shows, in profile, the general characteristic of a lens 224 when an image is placed at its focal point.
- the lens 224 will be taken as one of the lenses in the Lens Array of the invention.
- Three representative pixels from a Lens Source Group associated with the lens are shown, la, 4a, and 7a respectively.
- the labeling system indicates that the pixels are from Source Images 1, 4, and 7, and their placement within their respective Source Images is at location "a" (in this case corresponding to the upper left hand comer of the Composite Image 200).
- Figure 16 shows example central rays coming from each of the three pixels la, 4a and 7a. The rays emerging from the lens are parallel, because the lens is placed at the focal distance from the pixels. Thus, the rays from each pixel exit the lens in different directions, the directions being dependent upon the lens characteristics and the location of the pixels. This results in the three Viewable Images 222 shown at the three different positions in Figure 16 being seen at distinct Viewer Angular Ranges, such that viewers located in the different directions from the invention will see conespondingly different Viewable Images.
- FIG. 17 shows the profile of three lenses, matched in focal length, size and location relative to the elements of the Composite Image. Each of the lenses separates the image elements into different directions as illustrated in Figure 16.
- a 9-by-9 Lens Anay overlaid on a 9-by-9 Lens Source Group, would deconvolve the spatially multiplexed elements in Figure 14 to the nine individual Source Images, now Viewable Emages.
- the lens array can be either a lens array 32 curved in one-dimension, as suggested by the curved axial array 32 depicted in Figure 18, or a lens array curved in two-dimensions as depicted by the example in Figure 19, or a combination of the two.
- the selection of the array is made as suitable in optical characteristics to deconvolve the Composite Image and project it toward the pre-selected Viewer Angular Region. It should be noted that there is no requirement for the lenses within the Lens Array to be "perfect" or even the same as the other lenses within the array. If a lens has distortion, adjustment in the image plane can be often made to back out the distortion. Specifically, the pixels within a particular Lens Source Group can be placed to accommodate any defects or differences in the associated lens.
- the light associated with viewing the image can be provided via backlighting, front lighting, or a combination of the two.
- the light source could also be from a projector in the embodiments where the Composite Image is changed in real time.
- the light can be neutral, colored, polarized or unpolarized.
- the Viewer Angular Range for each Viewable Image is predetermined by the design of the Composite Image and the characteristics of the lenses. At large angles off of optical axis, the lens performance and geometry may fail to give an appropriate Viewable Image from information placed on the Composite Image.
- baffles are an element of some embodiments of this invention.
- that light which is not within the lens' optical performance geometry to refract a pixel's light into a desired direction can still be used to illuminate "walls" located along the edges of the lenses.
- These walls would simply be like standard lens baffles, except each of the lenses' baffle walls would be provided individual reflection characteristics that, when seen as an ensemble of all the lens baffles, would produce an image in accord with the pattern painted on the ensemble of baffles.
- the cunent prefened embodiment of the invention is the "basic" model of the invention, wherein modifications can easily be made.
- the basic model includes a light source (either a rear screen projector or other light source), a Composite Image applied to a material or projected on to a rear projection screen, a Lens Array, and several Source Images. It is noted that multiple projectors may be used here an throughout this Detailed Description wherever a single projector is mentioned. It should be noted that this invention can change the direction of the Viewer Angular Ranges that Viewable Images are sent, not only by changing the configuration of the Composite Image, but also by simply moving the Lens Anay and Composite Emage transversely to one another, and by altering the curvature of the curved axial optics and orientation (angle and tilt).
- the number and extent of Viewer Angular Ranges of the Viewable Images can be fine tuned in the design of the Composite Emage by changing the size of the pixels. This can be done in real time by using a computer controlled rear projection screen (which would include a TV screen) as the medium for the Composite Image.
- the system can be designed such that pixels from a set of high resolution Source Images are only deconvolved into Viewable Images when the Lens Array is well focused. When the Lens Anay is slightly unfocussed, however, the high resolution Source Image pixels will average together to form the larger pixels of a low resolution Source Image. That is, a group of pixels in each Lens Source Group would form one pixel of a low resolution Source Image.
- the group of pixels would be designed to average together to have the conect brightness and color for the low resolution Source Image.
- the viewing location of a Viewable Image can be based not only on angle from the Composite Image Plane, but also on distance from the invention. This effect can be achieved by slightly offsetting a Source Image's pixels such that the light beamed out from the individual lenses in the Lens Array no longer runs in the same direction, that being a parallel direction for every lens. Instead of beaming light out in parallel for every lens, the lenses direct the light out such that the beams cross over at some modest distance from the Composite Image plane.
- Particularly suitable pliable, deformable films 104 that provide on side that is reflective include those from aluminized Kapton (0.5 to 1.0 thousandths of an inch thickness) from Dunmore Co ⁇ oration, 145 Wharton Road, Bristol, PA 19007-1620 and aluminized polyester from Sigma Technologies of Arlington, Arizona.
- aluminized Kapton 0.5 to 1.0 thousandths of an inch thickness
- Another suitable film that is non- metallic and reflective is produced and sold by 3M Company.
- a front projection screen may also be created.
- the description below provides specific detail on how such a screen may be achieved.
- the contrast of a projected image is subject to the intensity of the observable projection light relative to the intensity of the observable light from background sources. Increased intensity of observable light from background sources in the viewing environment conespondingly reduces an observer's ability to see the darker parts of the projected image, thus contrast limitation in a lighted viewing environment is most often imposed by the loss of darkness in elements of an image, rather than influences of background light on the brighter parts of an image.
- the observer has the ability to see the contrast inherent in the projected image, assuming that there is at least enough light in the projection to rise above threshold limits of eye sensitivity; and assuming that the screen itself does not deteriorate the contrast via transverse diffusion of the projected light (crosstalk).
- One way that background light rejection can be achieved is by removing non-projection light from the entire vicinity of the observer's eye (e.g. use a darkened room). But other options become apparent when considering that it is the background light that is ambient in the viewing environment seen by the observer that creates the problem, not the presence of the environmental light itself.
- the conditions favorable to maintenance of the projected image's inherent contrast can still be achieved.
- the contrast of an image projected onto a screen can be improved by increasing the image brightness, by reducing the background light's influence, or by a combination of both. Improving contrast by approaching the first option (increasing brightness) involves limiting the volume into which the projected light is scattered by the screen, thereby increasing the viewed brightness of the image achieved by any set amount of projection light.
- the contrast can be improved by limiting the volume from which light striking the screen from sources other than the projector can be redirected into the volume containing the audience.
- This invention's approach to achieving these contrast improvements introduces an additional possibility.
- the utility of the invention as a contrast-enhancing screen can provide an angular screen-reflection profile in which the light from a projector is concentrated towards the viewer, and that the projection light falls off sha ⁇ ly when the viewer moves to a position outside the designed viewer volume. Such sha ⁇ fall-off of intensity thereby adds the possibility of putting multiple, non-interfering images upon one screen, with each image being observable only from within its own peculiar viewing volume.
- the invention provides for all three elements of the advantageous screen described above.
- the invention also is more readily manufactured than other possible solutions for the production of screens having similar properties.
- This advantage is derived from simplicity of tool-making and modest cost of materials (to name but two elements of advantage).
- Other technology has been employed in attempts to achieve increased contrast for projected images.
- compared to simple diffuse white reflection surfaces e.g. white paint and/or plastic diffusing sheet
- tiny glass beads 232 act as tiny lenses that concentrate the light 228 into a smaller viewing volume than that characteristic of white paint coatings and plastic diffusers.
- the basic idea of such glass bead screens is illustrated in Figure 20.
- the refractive cylinder is employed, otherwise the same type of cross-talk as encountered with the glass spheres will result along the cylinders' cross-axis. (Note that segments of non-circular cross-sections are anticipated for the "cylinders" in the scope of the invention, the exact shape being as needed to achieve limitation of reflected projection light to a desired viewing volume.)
- the incoming projector light 234 passes into the cylindrical lenses 238 and, if the lenses 238 are backed by a specular reflector 240, reflects back out through the same lenses 238 as depicted in Figure 22.
- the effect of the lens array 238 is to disperse the reflected light 236 in one plane transverse to the plane of cylindrical axes, but without significant dispersal in the other transverse plane.
- the reflected light 236 can be contained in a small, well-defined dispersion angle. If the arc of the lens 238 is modest, then a great deal of the incoming projection light strikes the lens surface at a near-normal angle. This results in a high percentage of the light 234 entering the lens (significantly more light than with the glass bead approach, as illustrated previously in Figure 21). The value of increasing the efficiency of light entry extends beyond the desire to subject more of the light to the refractive effects of the cylindrical lens.
- Reduction of front- surface reflection is important to maintenance of a sha ⁇ angular cutoff profile.
- the invention seeks to reserve reflection processes for the projection light to that caused by a reflective surface imposed after the light has passed through the cylindrical lenses.
- the surface of the cylinder can be covered with an anti-reflection coating to reduce the effect of abrupt refractive index changes.
- the addition of an anti- reflection layer to the refractive surfaces is easily achieved by using a film whose refractive index is less than the refractive index of the cylinder's substrate, with the ideal anti-reflection index of the film being the square root of the cylinder substrate's index.
- the material 248 can still be used to obtain a very high finish surface for the lens.
- such a material is used for separation of the finish of the surfaces (both refractive and reflective) from the figure of the surfaces. This is achieved by the use of films 248 suspended between na ⁇ ow structural elements 252 for both the refractive and the reflective surfaces.
- Figure 23 illustrates one example of a film-suspension arrangement for creation of the closely-spaced cylindrical (curved axial) lens array 248.
- this invention uses a non- planar specular reflector 258 behind the cylindrical lens array 256, thereby making the invention a catadioptric system.
- An example reflector would be an array of closely-spaced portions of nominally cylindrical (curved axial elements) reflectors 258.
- This reflective array 256 is created by film suspension 254, 258 in a manner similar to the production of the refractive anay of Figure 10.
- the orientation of the cylindrical mirror axes is not the same as for the refractive cylinders. With this non-aligned condition, the cylindrical minors 258 will disperse the projection light along an axis different than the dispersion produced by the refractive cylindrical elements 254.
- Figure 24 illustrates the overall concept of clear film 254 adhered with cylindrical mo ⁇ hology to bulk clear refractive fill material 256 plus reflective film 258 adhered cylindrical mo ⁇ hology to the opposite side of the bulk fill 256.
- the effect of the arrangement in the invention is to produce a matrix of projection screen reflective cells with many advantages over traditional front projection screen technology, such as high-gain improved contrast and multiple imaging capabilities.
- a typical individual cell might be as shown in Figures 25A, 25B, and 25C.
- this invention anticipates gaps of either gas, liquid, or solid in the transparent bulk fill material). In most cases, avoiding cell-to-cell crosstalk will be important. This can be attained by keeping a small distance between front and back surfaces.
- the refractive light-deviation takes place at the surface and the inner material has no other major effect than to provide focusing space. For most designs, there needs to be enough distance from the refractive surface to the reflective surface for the light to move transversely. However, the thickness should not be so great as to allow the rays to cross over between cells, thereby exiting a different cell than they entered. If the cells 260 are made small, then the thickness can be kept quite small, even such that the screen 262 can be made highly flexible.
- Figure 26 illustrates a highly flexible screen 262 where small cell 260 size leads to a thin, flexible screen 262.
- the embodiment of this invention shown in the above figures uses film suspension to create the anays of cylindrical-like lenses and mirrors.
- the shape of the top of the ridges crosswise to their linear orientation can be any geometry as suits the application, but in general a thin crest is desirable.
- the invention anticipates that the shape of the ridges along its extension need not be a straight line. In fact, the invention anticipates advantage in some circumstances to providing curvature to the ridge either laterally, in depth, or both.
- the suspended film 165 or 248 is caused to deform to a desired figure (shape) using application of forces imposed by either gravitational, centrifugal, magnetic, electric, differential pressure, or any combination of influences thereof.
- the elasticity and mass of the film 165 or 248 are ( ' major elements in the deformation resulting from the force. With magnetic and electrical techniques, the magnetic and electrical field strengths between the span of the tool's bottom and the film combine with the film's elasticity as primary elements.
- the film 165 or 248 is sunounded by fluids (gas, liquid, or a combination of both) separable to each side of the film 165 or 248. A differential fluid pressure is applied to opposite sides of the film 165 or 248 to form uniform deformation to a desired figure.
- the properties of the film 165 or 248 can be modified by application of temperature and other variations in the physical and chemical environment to which the film 165 or 248 is subjected.
- This invention anticipates application of such conditioning.
- the series of ridges seen in Figures 10 and 22 serving as edges of suspension for the film have been designed to be sufficiently high, relative to the depth of the span between the ridges that, during deformation to the desired figure, the film 165 or 248 need not touch the tool 134 or 246 beneath it in the areas below the suspension.
- Reflection material can be applied to the minor surface either before or after the suspension process, and both are anticipated by the invention.
- bulk transparent material is applied. This material can then be cured or otherwise solidified (via cooling, chemical interaction, etc.) to secure the lenses' shapes.
- the chemical, optical and physical properties of the film 165 or 248 used for production of the cylindrical lens surface can be significantly different than the conesponding properties of the bulk material that is used to secure the desired optical figure of the lenses. These differences can be selected to advantage.
- the optically transparent bulk material 256 is a standard epoxy
- several transparent film chemistries are available to produce a more robust protection against environmental and mechanical (scratch, etc.) offenses to the lens anay.
- the index of refraction of the film 165 or 248 can be chosen to be appropriately less than that of the bulk material, thereby producing a hard antireflection shield for the bulk material.
- the array of cylindrical minors is made in a similar manner as to the making of the anay of cylindrical lenses. That is, film 165 or 248 is suspended across a series of ridges and deformed in any of the manners described for the lens anay fabrication, then solidified in figure by the use of a bulk substrate.
- the film 165 or 248 is to be made reflective, either before, during, or after suspension and solidification.
- the orientation of the cylindrical reflector array is pu ⁇ osely different than the orientation of the cylindrical refractor (lens) anay.
- the lens film 254 and the mirror film 258 are suspended with the two tools facing each other at the same time.
- a barrier wall is placed around the edges of the two-tools such that bulk material 256 can be poured between the two films 254 and 258, without leaking out from between the films 254 and 258, to simultaneously lock both films 254 and 258and their shapes into a monolithic piece, as can be pictorially conceived by collapsing together the three elements shown in Figure 24.
- the invention anticipates that the bulk fill 256 can be provided in multiple steps with pieces adhered together rather than a monolithic fabrication. This prefened embodiment would include making at least one of the suspension tools from a visually and ultraviolet transparent material 256.
- the invention can achieve this prismatic advantage by stair-casing the height of the suspension ridges, and pulling some of the clear film 254 tight against the wall on its neutral side (the backside of a resultant prism, where projection light does not impinge).
- One alternative to the stair-casing embodiment is the embedding of prisms whose index of refraction differs from the index of refraction of the bulk fill 256.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Lenses (AREA)
- Projection Apparatus (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067012174A KR100930145B1 (en) | 2003-11-18 | 2004-11-18 | Variable optical array and its manufacturing method |
EP04816982A EP1692560A4 (en) | 2003-11-18 | 2004-11-18 | Variable optical arrays and variable manufacturing methods |
JP2006541668A JP2007516469A (en) | 2003-11-18 | 2004-11-18 | Variable optical arrangement and variable manufacturing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US52307603P | 2003-11-18 | 2003-11-18 | |
US60/523,076 | 2003-11-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005050264A2 true WO2005050264A2 (en) | 2005-06-02 |
WO2005050264A3 WO2005050264A3 (en) | 2006-02-02 |
Family
ID=34619562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/039384 WO2005050264A2 (en) | 2003-11-18 | 2004-11-18 | Variable optical arrays and variable manufacturing methods |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1692560A4 (en) |
JP (1) | JP2007516469A (en) |
KR (1) | KR100930145B1 (en) |
CN (1) | CN100449351C (en) |
WO (1) | WO2005050264A2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1998214A1 (en) * | 2007-05-30 | 2008-12-03 | Osram Gesellschaft mit Beschränkter Haftung | Lighting device |
US9841605B2 (en) | 2012-06-27 | 2017-12-12 | 3M Innovative Properties Company | Optical component array |
CN109414875A (en) * | 2016-07-01 | 2019-03-01 | 飞利浦照明控股有限公司 | 3D printing reflector and its manufacturing method |
US11137246B2 (en) * | 2019-01-31 | 2021-10-05 | Himax Technologies Limited | Optical device |
US11828430B2 (en) | 2021-12-13 | 2023-11-28 | Lumileds Llc | Spreading feature for automotive rear fog lighting |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012094310A (en) * | 2010-10-26 | 2012-05-17 | Panasonic Corp | Lighting device |
CN102478681A (en) * | 2010-11-30 | 2012-05-30 | 联建(中国)科技有限公司 | Light guide element and light source device |
US10009527B2 (en) * | 2014-06-26 | 2018-06-26 | Philips Lighting Holding B.V. | Compact LED lighting unit for use in camera or video flash applications |
CN104597707B (en) * | 2014-12-24 | 2016-09-14 | 深圳雅图数字视频技术有限公司 | Optical projection system and screen thereof |
JP6686534B2 (en) * | 2016-03-02 | 2020-04-22 | 大日本印刷株式会社 | Lens sheet, imaging module, and imaging device |
CN107479204A (en) * | 2017-09-25 | 2017-12-15 | 深圳市皓龙激光设备有限公司 | Laser facula apparatus for shaping and the laser lamp with the laser facula apparatus for shaping |
CN109445002B (en) * | 2018-11-26 | 2021-03-23 | Oppo广东移动通信有限公司 | Micro-lens array structure and manufacturing method thereof, fly-eye lens and electronic device |
CN109348114A (en) * | 2018-11-26 | 2019-02-15 | Oppo广东移动通信有限公司 | Imaging device and electronic equipment |
CN116736415A (en) * | 2020-09-21 | 2023-09-12 | 郭生文 | Optical waveguide lens |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3087375A (en) * | 1957-06-06 | 1963-04-30 | Voigtlaender Ag | Albada type viewfinder having undulating reflecting mask frame |
US4078854A (en) * | 1971-10-05 | 1978-03-14 | Canon Kabushiki Kaisha | Stereo imaging system |
KR0135922B1 (en) * | 1993-12-16 | 1998-04-27 | 다테이시 요시오 | Liquid crystal projector and liquid crystal display device using micro lens plate |
JP3060357B2 (en) * | 1994-06-22 | 2000-07-10 | キヤノン株式会社 | Scanning exposure apparatus and device manufacturing method using the scanning exposure apparatus |
JPH1020242A (en) * | 1996-07-08 | 1998-01-23 | Fuji Xerox Co Ltd | Projection type display device |
DE19635942A1 (en) * | 1996-09-05 | 1998-03-12 | Vitaly Dr Lissotschenko | Optical beam shaping system |
JP3666203B2 (en) * | 1997-09-08 | 2005-06-29 | ソニー株式会社 | Solid-state image sensor |
US6081380A (en) * | 1997-12-22 | 2000-06-27 | Hitachi, Ltd. | Directional reflection screen and projection display |
JPH11326603A (en) * | 1998-05-19 | 1999-11-26 | Seiko Epson Corp | Microlens array and its production thereof, and display |
US6297911B1 (en) * | 1998-08-27 | 2001-10-02 | Seiko Epson Corporation | Micro lens array, method of fabricating the same, and display device |
JP2000147264A (en) * | 1998-11-05 | 2000-05-26 | Mitsubishi Chemicals Corp | Light control sheet and surface light source device using the same |
CN1222811C (en) * | 1999-09-30 | 2005-10-12 | 皇家菲利浦电子有限公司 | Lenticular device |
JP2002049326A (en) * | 2000-08-02 | 2002-02-15 | Fuji Photo Film Co Ltd | Plane light source and display element using the same |
JP2002090313A (en) * | 2000-09-19 | 2002-03-27 | Hitachi Ltd | Pattern defect inspection device |
US6507441B1 (en) * | 2000-10-16 | 2003-01-14 | Optid, Optical Identification Technologies Ltd. | Directed reflectors and systems utilizing same |
JP3677444B2 (en) * | 2000-10-16 | 2005-08-03 | 住友大阪セメント株式会社 | 3D shape measuring device |
JP2002148122A (en) * | 2000-11-15 | 2002-05-22 | Ushio Sogo Gijutsu Kenkyusho:Kk | Optical system for wavelength monitor for laser beam |
DE10104317C2 (en) * | 2001-01-25 | 2003-04-30 | 4D Vision Gmbh | lens assembly |
US6570700B2 (en) * | 2001-03-14 | 2003-05-27 | 3M Innovative Properties Company | Microstructures with assisting optical elements to enhance an optical effect |
JP2002350724A (en) * | 2001-05-23 | 2002-12-04 | Oki Data Corp | Optical array and optical device using the same |
JP2003066537A (en) * | 2001-08-27 | 2003-03-05 | Olympus Optical Co Ltd | Optical screen |
JP3983652B2 (en) * | 2002-11-13 | 2007-09-26 | シャープ株式会社 | Microlens array substrate manufacturing method and manufacturing apparatus |
-
2004
- 2004-11-18 KR KR1020067012174A patent/KR100930145B1/en not_active IP Right Cessation
- 2004-11-18 EP EP04816982A patent/EP1692560A4/en not_active Withdrawn
- 2004-11-18 WO PCT/US2004/039384 patent/WO2005050264A2/en active Application Filing
- 2004-11-18 CN CNB2004800400333A patent/CN100449351C/en not_active Expired - Fee Related
- 2004-11-18 JP JP2006541668A patent/JP2007516469A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of EP1692560A4 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1998214A1 (en) * | 2007-05-30 | 2008-12-03 | Osram Gesellschaft mit Beschränkter Haftung | Lighting device |
US8622585B2 (en) | 2007-05-30 | 2014-01-07 | Osram Gesellschaft Mit Beschraenkter Haftung | Lighting device with multiple light sources and primary and secondary optics |
US9841605B2 (en) | 2012-06-27 | 2017-12-12 | 3M Innovative Properties Company | Optical component array |
US10578884B2 (en) | 2012-06-27 | 2020-03-03 | 3M Innovative Properties Company | Method of making a polarizing beamsplitter array |
CN109414875A (en) * | 2016-07-01 | 2019-03-01 | 飞利浦照明控股有限公司 | 3D printing reflector and its manufacturing method |
CN109414875B (en) * | 2016-07-01 | 2021-03-16 | 昕诺飞控股有限公司 | 3D printing reflector and manufacturing method thereof |
US11241849B2 (en) | 2016-07-01 | 2022-02-08 | Signify Holding B.V. | 3D printed reflector and method for its manufacture |
US11772342B2 (en) | 2016-07-01 | 2023-10-03 | Signify Holding B.V. | 3D printed reflector and method for its manufacture |
US11137246B2 (en) * | 2019-01-31 | 2021-10-05 | Himax Technologies Limited | Optical device |
US11828430B2 (en) | 2021-12-13 | 2023-11-28 | Lumileds Llc | Spreading feature for automotive rear fog lighting |
Also Published As
Publication number | Publication date |
---|---|
EP1692560A4 (en) | 2009-12-30 |
KR100930145B1 (en) | 2009-12-07 |
EP1692560A2 (en) | 2006-08-23 |
CN1938634A (en) | 2007-03-28 |
JP2007516469A (en) | 2007-06-21 |
KR20060103924A (en) | 2006-10-04 |
CN100449351C (en) | 2009-01-07 |
WO2005050264A3 (en) | 2006-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7268950B2 (en) | Variable optical arrays and variable manufacturing methods | |
US7619824B2 (en) | Variable optical arrays and variable manufacturing methods | |
US7262912B2 (en) | Front-projection screens including reflecting layers and optically absorbing layers having apertures therein, and methods of fabricating the same | |
US4666248A (en) | Rear-projection screen | |
CN108181716B (en) | System for imaging in the air | |
CA1331299C (en) | Light transmitting screen and display system utilising same | |
JP3553929B2 (en) | Method for producing light diffusing material | |
US7548369B2 (en) | Projection-receiving surface comprising a single sheet formed into a plurality of catenoid-like mirrorlettes | |
US20070253058A1 (en) | Brightness enhancement structures including optical microstructures to provide elliptical diffusion patterns and methods of fabricating and operating the same | |
US8294992B2 (en) | Projection-receiving surface | |
EP1692560A2 (en) | Variable optical arrays and variable manufacturing methods | |
EP0773401A1 (en) | Device with micro-filters for selecting colours and images | |
JP2006526811A (en) | Microlens array-based high-resolution, low-image artifact transmissive screen | |
KR101803401B1 (en) | Method for producing multiple-object images and an optical film for implementing said method | |
CN116300133A (en) | Three-dimensional display device and system | |
US20070035952A1 (en) | Method for producing a medium for reproducing three-dimensional configurations | |
CN213545032U (en) | Special directional screen of bore hole 3D | |
JP4867167B2 (en) | Transmission screen and rear projection display device | |
CN112824970B (en) | Direct projection screen | |
WO2000052527A1 (en) | An optical element screen | |
KR20060081312A (en) | Structure for prizm tyep fresnel lens | |
JP2004198740A (en) | Lens array, screen and back projection type display device using lens array | |
CN116482872A (en) | Stereoscopic projection imaging system, miniature imaging device and miniature imaging device | |
JP2004012570A (en) | Magnification observation apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006541668 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004816982 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020067012174 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200480040033.3 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2004816982 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020067012174 Country of ref document: KR |