WO2023200920A1 - Ensemble optique pour dispositif de visiocasque (hmd) - Google Patents

Ensemble optique pour dispositif de visiocasque (hmd) Download PDF

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Publication number
WO2023200920A1
WO2023200920A1 PCT/US2023/018444 US2023018444W WO2023200920A1 WO 2023200920 A1 WO2023200920 A1 WO 2023200920A1 US 2023018444 W US2023018444 W US 2023018444W WO 2023200920 A1 WO2023200920 A1 WO 2023200920A1
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WIPO (PCT)
Prior art keywords
optical
light
lens
focus
display
Prior art date
Application number
PCT/US2023/018444
Other languages
English (en)
Inventor
Pavel Trochtchanovitch
Fei Liu
Zhisheng Yun
Original Assignee
Meta Platforms Technologies, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/988,638 external-priority patent/US20230333382A1/en
Application filed by Meta Platforms Technologies, Llc filed Critical Meta Platforms Technologies, Llc
Publication of WO2023200920A1 publication Critical patent/WO2023200920A1/fr

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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
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/002—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of materials engineered to provide properties not available in nature, e.g. metamaterials
    • 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
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
    • 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
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • This patent application relates generally to compact and low-profile display systems, and more specifically, to a head-mount display (HMD) device using an optical assembly including a focus element, a transparent display, and a compensation element.
  • HMD head-mount display
  • a head-mounted display may be a headset or eyewear used for video playback, gaming, or sports, and in a number of contexts and applications, such as virtual reality (VR), augmented reality (AR), and/or mixed reality (MR).
  • a headmounted display (HMD) device may communicate information to or from a user who is wearing the headset.
  • a virtual reality (VR) headset may be used to present visual information to simulate any number of virtual environments when worn by a user. That same virtual reality (VR) headset may also receive information from the user’s eye movements, head/body shifts, voice, or other user-provided signals.
  • a conventional head-mounted display (HMD) device relies on optical configurations that are typically large and bulky.
  • HMDs head-mounted displays
  • it is becoming more important to emphasize and improve upon head-mounted display (HMD) device characteristics, such as compactness, weight, and optical performance, especially in design and implementation.
  • improving optical performance may typically involve increasing the number or size of optical components, which in turn may create or add more bulk and weight.
  • Other head-mounted displays (HMDs) may have optical configurations that improve compactness and reduce size and weight, but these conventional display devices, having fewer optical components, may often have decreased optical resolution or visual acuity, such as limitations with central and/or peripheral fields of view (FOVs) for the user.
  • FOVs central and/or peripheral fields of view
  • an optical assembly comprising: a compensation element to modify a phase of a first light arriving from an environment outside a head-mounted display (HMD) device; a transparent display to present an image or a video and to pass through the phase- modified first light; and a focus element to focus the phase-modified first light and a second light from the transparent display on an eyebox, wherein the optical assembly is to reduce one or more aberrations in the first light or the second light.
  • HMD head-mounted display
  • the compensation element may comprise a freeform phase plate, a zoom focus lens, or a liquid lens.
  • the compensation element may further focus an optical power from the focus element.
  • the compensation element may further correct one or more of a myopia, a hyperopia, or an astigmatism.
  • the compensation element may be fabricated through one or more of cylindrical coordinate machining, etching, photolithography, grinding, raster flycutting, or a holography technique.
  • the focus element may comprise one of: a metalens; a light field lens; a solid optical lens; or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may comprise a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • the transparent display may have a curvature comprising a spherical curvature, a cylindrical curvature, or a combination thereof.
  • a shape and a size of the transparent display may be selected based, at least in part, on one or more of a shape and a size of the compensation element or a shape and a size of the focus element.
  • the transparent display, the compensation element, and the focus element may be aligned along a primary optical axis of the head-mounted display (HMD) device.
  • HMD head-mounted display
  • a head-mounted display (HMD) device comprising: a body comprising a transparent front side; and an optical assembly within the body, the optical assembly comprising: a compensation element to modify a phase of a first light arriving from an environment outside the head-mounted display (HMD) device; a transparent display to present an image or a video and to pass through the phase-modified first light; and a focus element to focus the phase-modified first light and a second light from the transparent display on an eyebox, wherein the optical assembly is to reduce one or more aberrations in the first light or the second light.
  • HMD head-mounted display
  • the compensation element may comprise a freeform phase plate, a zoom focus lens, or a liquid lens; and the focus element may comprise a metalens, a light field lens, a solid optical lens, or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may comprise a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • the compensation element may further: focus an optical power from the focus element; or correct one or more of a myopia, a hyperopia, or an astigmatism.
  • the transparent display, the compensation element, and the focus element may be aligned along a primary optical axis of the head-mounted display (HMD) device.
  • HMD head-mounted display
  • a method for a head-mounted display (HMD) device comprising: modifying, at a compensation element, a phase of a first light arriving at the compensation element from an environment outside the head-mounted display (HMD) device; providing an image or a video, by a transparent display, while allowing the phase-modified first light to pass through the transparent display; and focusing, at a focus element, the phase- modified first light and a second light from the transparent display on an eyebox, wherein the compensation element and the focus element are to reduce one or more aberrations in the first light or the second light.
  • the method may further comprise: focusing, by the compensation element, an optical power from the focus element; or correcting, by the compensation element, one or more of a myopia, a hyperopia, or an astigmatism.
  • the compensation element may comprise a freeform phase plate, a zoom focus lens, or a liquid lens.
  • the focus element may comprise a metalens, a light field lens, a solid optical lens, or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may comprise a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • FIG. 1 illustrates a head-mounted display (HMD) device 100, according to one or more embodiments of the present disclosure.
  • HMD head-mounted display
  • FIG. 2 illustrates a cross section view of simplified version of a headmounted display (HMD) device 200, according to one or more embodiments of the present disclosure.
  • HMD headmounted display
  • Figure 3 illustrates an optical assembly of a head-mount display (HMD) device with a focus element, a transparent display, and a compensation element, according to one or more embodiments of the present disclosure.
  • HMD head-mount display
  • Figure 4 illustrates a number of implementations of the optical element, according to one or more embodiments of the present disclosure.
  • Figure 5 illustrates focusing of visual content from a display to an eyebox through an optical lens configuration, where the display is smaller than the optical lens configuration, according to one or more embodiments of the present disclosure.
  • Figure 6 illustrates focusing of visual content from a display to an eyebox through an optical lens configuration, where the display is larger than the optical lens configuration, according to one or more embodiments of the present disclosure.
  • Figure 7 illustrates a number of optical lens configurations for the focus element, according to one or more embodiments of the present disclosure.
  • Figure 8 illustrates details of an optical lens configuration for the focus element with a reflective polarizer layer, a quarter wave layer, and a semi-transparent mirror, according to one or more embodiments of the present disclosure.
  • Figures 9A - 9E illustrate a number of configurations of reflective polarizer layer, quarter wave layer, and semi-transparent mirror in an optical lens configuration for the focus element, according to one or more embodiments of the present disclosure.
  • Figure 10A illustrates an assembly system to provide a head-mount display (HMD) device with an optical lens configuration, according to one or more embodiments of the present disclosure.
  • HMD head-mount display
  • Figure 10B illustrates an assembly system to provide a head-mount display (HMD) device with an optical assembly including a focus element, a transparent display, and a compensation element, according to one or more embodiments of the present disclosure.
  • HMD head-mount display
  • FIG 11A illustrates a flowchart 1100A of a method to assemble a head-mount display (HMD) device with an optical lens configuration, according to one or more embodiments of the present disclosure.
  • HMD head-mount display
  • Figure 11 B illustrates a flowchart 1100B of a method to assemble a head-mount display (HMD) device with an optical assembly including a focus element, a transparent display, and a compensation element, according to one or more embodiments of the present disclosure.
  • HMD head-mount display
  • head-mounted displays may include optical configurations that are typically large and bulky, and therefore, may be vulnerable to compactness, weight, and optical performance issues.
  • Simple lenses may be prone to aberrations, especially chromatic aberration, and therefore, may not be suitable for precise imaging.
  • Doublets which are made up of two simple lenses paired together may allow more optical surfaces, thicknesses, and formulations, and thus, provide additional degrees of freedom to correct more optical aberrations and improve image precision.
  • Conventional doublets which may include oil or similar materials in a gap between the two lenses, may add to weight challenges in a head-mounted display (HMD) device, especially when larger size lenses may be needed to focus display content on an eyebox.
  • augmented reality (AR) and/or mixed reality (MR) headmounted display (HMD) devices may combine a view of a user’s environment, that is light from the environment, with displayed content (light from the display). While the light from the environment may be unpolarized, the light from the display is likely to be polarized. Thus, the different lights may be subject to different aberrations when they pass through the optical elements such as lenses in order to be focused on an eyebox.
  • HMD head-mount display
  • the focus element, the transparent display, and the compensation element may be arranged such that light from the environment may pass through the compensation element, the transparent display, and focused on the eyebox through the focus element. Light from the transparent display may also be focused on the eyebox through the focus element.
  • the compensation element may modify a phase profile of incident light from the environment and/or correct spherical and/or coma aberrations before the light from the environment passes through the transparent display.
  • the focus element may be implemented in a number of different ways and may correct chromatic aberrations in addition to focusing the light from the environment and the light from the display to the eyebox.
  • the focus element may be implemented as a metalens, in which phase may be induced by nanostructures on a substrate, thereby acting as a diffractive optical lens without the chromatic aberrations.
  • the focus element may also be implemented as a light field lens, which may generate 3D data from a 2D image.
  • the focus element may be implemented as an optical lens configuration (also referred to as hollow singlet optical lens configuration), where selected surfaces of two optical elements with a gap between them may be provided with a reflective polarizer layer, a quarter wave layer, and/or a semi-transparent mirror to reduce chromatic aberration while focusing the lights on the eyebox.
  • an optical lens configuration also referred to as hollow singlet optical lens configuration
  • selected surfaces of two optical elements with a gap between them may be provided with a reflective polarizer layer, a quarter wave layer, and/or a semi-transparent mirror to reduce chromatic aberration while focusing the lights on the eyebox.
  • an optical lens configuration may include two optical elements having a gap in between these two optical elements.
  • surfaces of the individual elements may also be provided with any number of optical layers. These may include, but not limited to, a reflective polarizer layer, a quarter wave layer, a semi-transparent mirror, or other optical layer. These optical layers may be used by the optical lens configuration, for example, to help focus visual content on a display of the head-mount display (HMD) system to an eyebox.
  • HMD head-mount display
  • the optical lens configuration may generate optical power through by reflecting surfaces of the cavity between the elements.
  • the two- element optical lens configuration may provide non-chromatic aberration resulting in improved optical imaging quality and increased compactness. Two more refractive surfaces may reduce spherical aberration, coma, astigmatism, and/or field curvature.
  • the optical lens configuration may allow reduced weight for the optical components of the head-mount display (HMD) device.
  • the optical lens configuration may also allow simpler, higher yield production compared to conventional lens systems. Other benefits and advantages may also be apparent.
  • An optical assembly as used herein refers to a collection of optical components for a head-mount display (HMD) device that include a focus element, a transparent display, and a compensation element for focusing light from the environment as well as light from the transparent display onto an eyebox while mitigating aberrations.
  • An optical configuration as used herein refers to two optical elements having a gap in between these two optical elements. In some examples, the optical configuration may be used as a focus element among other implementations.
  • An optical element as used herein refers to an optical lens that may form together with another optical lens an optical configuration for example. In other examples, a single optical element (an optical lens) may also be used as the focus element.
  • Figure 1 illustrates a head-mounted display (HMD) device 100, according to an example.
  • a “near-eye display” may refer to a device (e.g., an optical device) that may be in close proximity to a user’s eye.
  • artificial reality may refer to aspects of, among other things, a “metaverse” or an environment of real and virtual elements, and may include use of technologies associated with virtual reality (VR), augmented reality (AR), and/or mixed reality (MR).
  • a “user” may refer to a user or wearer of a “near-eye display.”
  • Head-mounted display (HMD) device 100 shown in Figure 1 in the perspective view includes a body 102, a front side 104, a bottom side 106, a left side 108, and a head strap 110.
  • the head-mounted display (HMD) device 100 may be a part of a virtual reality (VR) system, an augmented reality (AR) system, a mixed reality (MR) system, another system that uses displays or wearables, or any combination thereof.
  • the head strap 110 may have an adjustable or extendible length.
  • the head-mounted display (HMD) device 100 may include additional, fewer, and/or different components.
  • the head-mounted display (HMD) device 100 may present to a user, media or other digital content including virtual and/or augmented views of a physical, real-world environment with computer-generated elements.
  • Examples of the media or digital content presented by the head-mounted display (HMD) device 100 may include images (e.g., two-dimensional (2D) or three- dimensional (3D) images), videos (e.g., 2D or 3D videos), audio, or any combination thereof.
  • the images and videos may be presented to each eye of a user by one or more display assemblies (not shown in Figure 1 ) enclosed in the body 102 of the head-mounted display (HMD) device 100.
  • the head-mounted display (HMD) device 100 may provide solely virtual reality (VR) applications
  • the front side 104 of the body 102 may be opaque as see-through functionality may not be needed for such applications.
  • head-mounted displays (HMDs) providing augmented reality (AR) and/or mixed reality (MR) applications may include a transparent front side 104 to allow the user to see through to the real environment, which may be augmented with artificial content by the respective application.
  • display optics i.e. , one or more lenses
  • HMD head-mounted display
  • FOV field of view
  • an “eyebox” may be a two-dimensional box that may be positioned in front of the user’s eye from which a displayed image from an image source may be viewed.
  • the display electronics of the head-mounted display (HMD) device 100 may display or facilitate the display of images to the user according to data received from, for example, a communicatively coupled console or server (not shown in Figure 1 ).
  • the display electronics may include one or more display panels.
  • the display electronics may include any number of pixels to emit light of a predominant color such as red, green, blue, white, or yellow.
  • the display electronics may display a three-dimensional (3D) image, e.g., using stereoscopic effects produced by two-dimensional panels, to create a subjective perception of image depth.
  • the display optics may display image content optically (e.g., using optical waveguides and/or couplers) or magnify image light received from the display electronics, correct optical errors associated with the image light, and/or present the corrected image light to a user of the head-mounted display (HMD) device 100.
  • the display optics may include a single optical element or any number of combinations of various optical elements as well as mechanical couplings to maintain relative spacing and orientation of the optical elements in the combination.
  • one or more optical elements in the display optics may have an optical coating, such as an anti-reflective coating, a reflective coating, a filtering coating, and/or a combination of different optical coatings.
  • the display optics may also be designed to correct one or more types of optical errors, such as two-dimensional optical errors, three- dimensional optical errors, or any combination thereof.
  • optical errors such as two-dimensional optical errors, three- dimensional optical errors, or any combination thereof.
  • two-dimensional errors may include barrel distortion, pincushion distortion, longitudinal chromatic aberration, and/or transverse chromatic aberration.
  • three-dimensional errors may include spherical aberration, chromatic aberration field curvature, and astigmatism.
  • FIG. 2 illustrates a cross section view of simplified version of a headmounted display (HMD) device 200, according to an example.
  • the head-mounted display (HMD) device 200 shown in Figure 2 with select components for illustration purposes may include a rigid body 202 housing various electronic and optical components, display(s) 210, and optical lens configuration 212.
  • An eye 208 and associated eyebox 214, along with primary optical axis 204 and optical axis 206 are also shown.
  • VR virtual reality
  • AR augmented reality
  • MR mixed reality
  • the display(s) 210 may be transparent or semitransparent to allow the user (i.e., the eye 208) to see the environment through the transparent or semi-transparent body 202 of the head-mounted display (HMD) device 200.
  • the optical lens configuration 212 may provide a larger or expanded field of view (FOV) to improve a user’s immersive experience.
  • the head-mounted display (HMD) device 200 may include a primary optical axis 204 and an optical axis 206.
  • the primary optical axis 204 may provide a central field of view (FOV) and the tiled optical axis 206 may provide a peripheral field of view (FOV).
  • FOV central field of view
  • FOV peripheral field of view
  • the content displayed on the display(s) 210 may be focused on the eyebox 214 by the optical lens configuration 212.
  • the optical lens configuration 212 may practically expand the optical axis 206 between the optical lens configuration 212 and the display(s) 210 allowing a wider area of content to be focused on the eyebox 214.
  • Single lenses, if used as optical lens configuration 212 may cause chromatic aberration, as discussed previously.
  • An optical lens configuration comprising two lenses with an air gap between them may, on the other hand, reduce spherical aberration, coma, astigmatism, and/or field curvature by providing additional refractive surfaces. Additionally, the combination of two light-weight lenses in a single structure may allow thinner lenses to be used reducing overall weight of the head-mount display (HMD) device 200.
  • HMD head-mount display
  • FIG. 3 illustrates an optical assembly of a head-mount display (HMD) device with a focus element, a transparent display, and a compensation element, according to an example.
  • Diagram 300 shows light from the environment 318 passing through a transparent or semi-transparent front side of a body 314 of a head-mounted display (HMD) device, a compensation element 312, and a display 310 before being focused on an eyebox 304 by a focus element 308 for viewing by eye 302 of a user.
  • Light from the display 316 may originate at the display 310 and be focused by the focus element 308 on the eyebox 304.
  • the eyebox 304, the focus element 308, the display 310, and the compensation element 312 may be centrally aligned around a primary axis 306.
  • the compensation element 312 may have a substantially similar optical focus power as that of the focus element 308, but with a reverse sign to compensate the focus power from the focus element 308 such that the user may see his/her environment without any focus power. In other examples, the compensation element 312 may have a different focus power compared to that of the focus element 308 to correct one or more of a myopia, a hyperopia, or an astigmatism.
  • head-mounted display (HMD) devices providing augmented reality (AR) and/or mixed reality (MR) applications may include a transparent front side of a body 314 to allow the user to see through to the real environment, which may be augmented with artificial content by the respective application.
  • the compensation element 312 to compensate a focus power introduced by the focus element 308, may be a free-form phase plate, a zoom focus lens, a liquid lens, or similar phase correction structure to modify the phase profile of light passing through.
  • wavefront deformations may be compensated in form of spherical or coma aberrations.
  • the compensation element 312 may have a radially symmetric or a pseudo-random phase change profile.
  • the compensation element 312 (free-form phase plate) may operate based on having one or both surfaces of the plate a tailored surface relief, thus, a spatially variable path length through the plate material (e.g., an optical glass).
  • a refractive index of the plate material may be substantially higher than that of air, even small surface features may lead to substantial phase changes.
  • the compensation element 312 may operate based on a variation of the refractive index in the medium, while having flat (and typically parallel) surfaces.
  • anti-reflection coatings may be applied to both surfaces of a phase corrector structure in order to minimize reflection losses and potentially disturbing effects of parasitic reflected beams.
  • the compensation element 312 may be fabricated through a number of techniques including, but not limited to, cylindrical coordinate machining such as diamond turning, etching, photolithography, grinding, and raster flycutting. In case of compensation elements with refractive index variations within the material, holography techniques may be applied, for example, to automatically obtain a phase profile for compensating optical aberrations of certain optical elements.
  • the display 310 may be curved to transmit light from the display in the direction of the eyebox 304.
  • a curvature of the display 310 may be spherical, cylindrical, or a combination of those depending at least in part on the headmount display (HMD) device configuration, a shape and size of the compensation element 312, and/or a shape and size of the focus element 308.
  • the display 310 may be transparent. In other examples, the display 310 may be flexible and shaped according to the configuration of the remaining components.
  • the display 310 may be manufactured using absorptive or emissive technologies.
  • Absorptive technologies may include liquid crystal displays (LCDs), while emissive technologies may include light-emitting diode (LED) based displays.
  • LED-based displays may include organic LED (OLED) or inorganic LED-based displays.
  • Further examples of transparent displays may include, but are not limited to, projection displays, where images or videos are projected onto a transparent material; passive transparent displays, which utilize a projector as the external light source to project images or videos onto a transparent medium embedded with resonant nanoparticles that may selectively scatter the projected light; and electroluminescent displays, which may include a luminescent phosphorous layer sandwiched between two transparent electrodes layers.
  • Other examples may include MicroLED displays or any transparent pixelated emitters.
  • the optical assembly combining the focus element 308, the display 310 (transparent and curved), and the compensation element 312 may allow the light from the environment 318 and the light from the display 316 to be focused on the eyebox 304 while reducing aberrations such as chromatic aberration that may be created by thinner, lighter optical elements in a light-weight head-mount display (HMD) device.
  • HMD light-weight head-mount display
  • Figure 4 illustrates a number of implementations of the optical element, according to an example.
  • Diagram 400 shows four example implementations of focus element 402.
  • the focus element 402 may be implemented as a metalens 404, a light field lens 406, a solid lens 408, or as an optical lens configuration 410 also referred to as hollow singlet optical lens configuration.
  • optical lenses may be designed in flat form such as diffractive lenses.
  • diffractive lenses For example, in a diffractive lens that mimics a planoconvex refractive lens, the convex surface may be flattened by breaking it down into radial zones.
  • diffractive lenses may have strong chromatic aberration, that is, the focal point of the lens may shift linearly with an inverse of the wavelength at wavelengths other than the main wavelength of the lens.
  • metalenses are optical components made using flat lens techniques and use metasurfaces to focus light.
  • Metalenses which may be used together with or in place of diffractive lenses, may be made from metamaterial - referring to subwavelength-level artificially engineered 3D material with effective optical parameters.
  • the phase may be induced via a response of nanostructures formed on a surface of a substrate material.
  • Metalenses may also manipulate a polarization of light, while diffractive surfaces cannot.
  • the metalens 404 may be used as the focus element 402 providing reduction of bulkiness and weight while also reducing chromatic aberration through the polarization manipulation during focusing of the light from the environment 318 and the light from the display 316 on the eyebox 304.
  • light field lens 406 may be an optical lens or collection of optical elements used to capture information from the light field in a particular scene, including intensity, color, and direction of the light rays. Thus, a three-dimensional model of the scene may be constructed.
  • the additional data captured by the light field lens also referred to as the rich light field data, may include depth maps and/or different perspectives of the scene taken at a moment of capture.
  • the light field lens 406 may be implemented as one or more microlens arrays. Having an array of hundreds of microlenses in front of a single digital sensor may allow for the light field information (rich light field data) to be captured producing an image that may be made up of any number of sub-images.
  • the light field lens 406 may also include a liquid lens, a zoom focusing lens, a liquid crystal lens, etc.
  • another alternative implementation for the focus element 402 may be a solid lens 408 also referred to herein as optical element or optical lens.
  • the chromatic aberration may be digitally corrected with pre-chromatic correction display (the display may be transparent pixelated OLED, LED, MicroLED, or other RGB emitters).
  • an optical lens configuration 410 with two optical elements having a gap in between them may be used as the focus element 402.
  • surfaces of the individual elements may also be provided with any number of optical layers. These may include, but not limited to, a reflective polarizer layer, a quarter wave layer, a semi-transparent mirror, or other optical layer. These optical layers may be used by the optical lens configuration, for example, to help focus visual content on a display of the head-mount display (HMD) system to an eyebox.
  • HMD head-mount display
  • Figure 5 illustrates focusing of visual content from a display to an eyebox through an optical lens configuration, where the display is smaller than the optical lens configuration, according to an example.
  • Diagram 500 shows light rays 516 from display 508 arriving at a first surface of the optical lens configuration, which may include a first optical element 504 and a second optical element 506 with an air gap 510 between them.
  • Light rays 518 in the air gap 510 are a mixture of refracted and reflected light rays with reflections being caused by a semi-transparent mirror applied to one of the optical element surfaces as discussed in conjunction with Figure 6 and 9A - 9E.
  • the optical lens configuration may allow the focused light rays 512 (displayed content) to be provided to an eyebox 502 allowing the user to view the entire content on the display 508, which is wider than the eyebox 502.
  • first optical element 504 and second optical element 506 may be selected from a number of optical lens types such as convex, concave, plano-convex, plano-concave, positive meniscus, or negative meniscus. At least one of the first optical element 504 and second optical element 506 may also be uniform, that is, neither convex, nor concave. In some examples, selected surfaces of the first optical element 504 and second optical element 506 may be provided with a reflective polarizer layer, a quarter wave layer, and/or a semi-transparent mirror to provide polarization adjustment and reflection of the light rays for enhanced optical focus power while keeping the lenses thin (i.e., light-weight).
  • Figure 6 illustrates focusing of visual content from a display to an eyebox through an optical lens configuration, where the display is larger than the optical lens configuration, according to an example.
  • Diagram 600 shows light rays 616 from display 608 arriving at a first surface of the optical lens configuration, which may include a first optical element 604 and a second optical element 606 with an air gap 610 between them.
  • Light rays 618 in the air gap 610 are a mixture of refracted and reflected light rays with reflections being caused by a semi-transparent mirror applied to one of the optical element surfaces as discussed in conjunction with Figure 6 and 9A - 9E.
  • the optical lens configuration may allow the focused light rays 612 (displayed content) to be provided to an eyebox 602 allowing the user to view the entire content on the display 608.
  • the first optical element 604 may be a meniscus negative optical lens, that is, the optical lens may function as a concave optical lens
  • the second optical element 606 may be a meniscus positive optical lens, that is, the optical lens may function as a convex optical lens.
  • a wider display area may be focused on the eyebox 602, as shown in diagram 600.
  • selected surfaces of the first optical element 604 and second optical element 606 may be provided with a reflective polarizer layer, a quarter wave layer, and/or a semitransparent mirror to provide polarization adjustment and reflection of the light rays for enhanced optical focus power.
  • Figure 7 illustrates a number of optical lens configuration configurations for the focus element, according to an example.
  • Diagram 700 includes example optical lens configurations 702, 704, 706, 708, 710, and 712, where the first optical element is identified as L1 and the second optical element is identified as L2 in each configuration.
  • L1 may be a uniform optical lens and L2 may be a piano convex optical lens.
  • optical lens configuration 704, L1 and L2, both may be uniform optical lenses.
  • L1 may be a meniscus negative optical lens and L2 may be a uniform optical lens.
  • optical lens configuration 708, L1 may be a uniform optical lens and L2 may be a meniscus negative optical lens.
  • optical lens configuration 710 L1 may be a meniscus positive optical lens and L2 may be a uniform optical lens.
  • L1 may be a uniform optical lens and L2 may be a meniscus positive optical lens.
  • Optical focus power (also referred to as dioptric, refractive, or convergence power) is a degree to which an optical lens or similar optical system converges or diverges light.
  • Optical focus power is equal to a reciprocal of the focal length of the optical lens or system.
  • High optical focus power may correspond to short focal length.
  • Converging optical lenses such as those typically used in a head-mount display (HMD) device to focus display content on an eyebox may have positive optical focus power.
  • the optical focus power of the combined optical lenses may approximately equal to a sum of optical focus powers of each optical lens.
  • the optical focus power of a single optical lens may be approximately equal to a sum of the optical focus powers of each surface.
  • the additional surfaces of the individual optical lenses in the optical lens configuration may provide refractive surfaces for reduction of spherical aberration, coma, astigmatism, and/or field curvature.
  • image precision on the eyebox may be improved by the optical lens configuration.
  • Figure 8 illustrates details of an optical lens configuration for a focus element with a reflective polarizer layer, a quarter wave layer, and a semi-transparent mirror, according to an example.
  • the example optical lens configuration in diagram 800 is shown with two optical elements separated for illustration of reflections and refractions.
  • Diagram 800 includes display 812, first optical element 804, second optical element 802, and eyebox 820.
  • a reflective polarizer layer 806 is shown on a first surface of the second optical element 802
  • a semi-transparent mirror 810 is shown on a first surface of the first optical element 804, and a quarter wave layer 808 is shown on a second surface of the first optical element 804.
  • Light rays 826 passing through the first optical element 804, light rays 824 in the gap between the two optical elements, and light rays 822 arriving at the eyebox 820 are also shown in the diagram 800.
  • the first surface (facing the first optical element 804) of the second optical element 802 may be provided with a reflective polarizer layer 806.
  • a reflective polarizer may transmit light with a particular polarization and reflect the light with other polarizations.
  • polarization management may be critical to improve an ambient contrast ratio and brightness of the display.
  • Traditional polarizing beam splitters (PBSs) used for polarization management may provide remarkable performance, but they may be too bulky and heavy for head-mount display (HMD) devices, whereas compactness and light weight may be sought-after characteristics for head-mounted AR displays.
  • a thin reflective polarizer layer 806 may be laminated on the first surface of the second optical element 802 uniformly providing similar performance to the performance of the polarizing beam splitter (PBS).
  • PBS polarizing beam splitter
  • unpolarized ambient light partially may pass through while polarized display light (e.g., from display 812) may be reflected by the reflective polarizer.
  • the head-mount augmented reality (AR) system may effectively combine images displayed by the display 812 with the outside world.
  • a quarter wave layer 808 may be provided on a second surface of the first optical element 804 to remedy the transmittance shortcoming of the reflective polarizer layer 806.
  • a quarter wave layer may alter a polarization state of a light wave travelling through it by converting linearly polarized light into circularly polarized light. If unpolarized ambient light is passed through the quarter wave layer 808, it may become linearly or circularly polarized. Thus, transmittance of the ambient light (environment) may be increased through the reflective polarizer layer 806.
  • Wave plates may be constructed using a birefringent material such as quartz, mica, or plastic, for which the index of refraction may be different for linearly polarized light along one or the other of two certain perpendicular crystal axes.
  • the behavior of a wave plate may depend on a thickness of the crystal, a wavelength of light, and a variation of the index of refraction. Selecting these parameters, a controlled phase shift between two polarization components of a light wave may be introduced, thereby altering the light wave’s polarization.
  • a semi-transparent mirror 810 may be provided on a first surface of the first optical element 804. Also called a one-way mirror or a 50/50 mirror, semi-transparent mirrors are reciprocal mirrors that appear reflective on one side and transparent on the other side. While semi-transparent mirrors may be constructed through a number of techniques, one example technique may include coating or encasing glass or similar material with a thin and almost-transparent layer of metal such as aluminum. Reflection of light rays by the semi-transparent mirror 810 in a direction of the eyebox 820 may increase an amount of light focused by the optical lens configuration.
  • light from the display may pass through the semitransparent mirror 810 and become focused by the first optical element 804. As the light exits the first optical element 804, its polarization may be changed as it passes through the quarter wave layer 808. Passing through the gap between the optical elements, the light from the display may pass through the reflective polarizer layer 806 and be further focused by the second optical element 802 arriving at the eyebox 820. Unpolarized light from the environment (in an augmented reality (AR) application) may pass through the semi-transparent mirror 810 and be focused by the first optical element 804. The light from the environment may become at least partially polarized by the quarter wave layer 808 as it exits the first optical element 804.
  • AR augmented reality
  • the partially polarized light from the environment may pass through the gap between the optical elements and at least partially pass through the reflective polarizer layer 806 into the second optical element 802, where it may be further focused on the eyebox 820.
  • a portion of the light from the environment, which may be reflected by the reflective polarizer layer 806 may pass through the quarter wave layer 808, first optical element 804, and be reflected back by the semi-transparent mirror 810.
  • a larger portion may pass through the reflective polarizer layer 806 and arrive at the eyebox 820.
  • a loss of light from the environment for the augmented reality (AR) application may be substantially reduced.
  • AR augmented reality
  • an optical lens configuration may include an assembly of two optical elements attached together with an air gap in-between.
  • Optical materials may be subject to chromatic dispersion, which may cause scattering of a signal at different wavelengths.
  • An example optical lens configuration may utilize two complementary dispersing optical elements to compensate the chromatic dispersion and have a resulting optical lens configuration with similar focusing power over the entire wavelength range.
  • an achromatic optical lens configuration may limit effects of chromatic and spherical aberration.
  • one of the optical elements may be a negative (concave) element with relatively high dispersion, and the other optical element may be a positive (convex) element with lower dispersion.
  • Other configurations may also be implemented.
  • HMD head-mount display
  • An example, optical lens configuration with the air gap between the two optical elements may allow thinner, lighter optical lenses to be used with lower overall weight and may also be easier to manufacture.
  • the optical lens configuration may be formed by affixing the two optical elements mechanically or chemically (e.g., gluing) along their peripheral edges.
  • an inert gas or similar may also be used to fill the gap instead of air.
  • the first optical element 804 and the second optical element 802 are shown as plano-convex optical lenses, but implementations are not limited to this configuration. Other optical lens types may also be selected using the principles discussed herein.
  • the reflective polarizer layer 806, the quarter wave layer 808, and the semi-transparent mirror 810 are shown on specific surfaces of the first optical element 804 and the second optical element 802. Examples are not limited to these configurations.
  • the three light treatment layers may be provided in other configurations too.
  • Figures 9A - 9E illustrate a number of configurations of reflective polarizer layer, quarter wave layer, and semi-transparent mirror in an optical lens configuration for the focus element, according to an example.
  • Diagram 900A of Figure 9A shows an example two-element configuration to serve as legend for the example configurations of light treatment layers in Figures 9B - 9E.
  • a first optical element (L1) 910 and a second optical element (L2) 912 are shown as uniform optical lenses for simplicity purposes.
  • both optical elements may include any optical lens type depending on the overall optical lens configuration construction.
  • a first surface (facing a display) 902 of the first optical element (L1 ) 910 may be designated as L1 S1.
  • a second surface (facing toward an eyebox) 904 of the first optical element (L1 ) 910 may be designated as L1 S2.
  • a first surface (facing toward the display) 906 of the second optical element (L2) 912 may be designated as L2S1.
  • a second surface (facing the eyebox) 908 of the second optical element (L2) 912 may be designated as L2S2.
  • Diagram 900B of Figure 9B shows a first example configuration, where a reflective polarizer layer (RP) 922 may be provided on a first surface of the second optical element (L2S1 ), a quarter wave layer (QW) 924 may be provided on a second surface of the first optical element (L1 S2), and a semi-transparent mirror (50/50 mirror) 926 may be provided on a first surface of the first optical element (L1 S1).
  • RP reflective polarizer layer
  • QW quarter wave layer
  • L1 S1 S1 quarter wave layer
  • a semi-transparent mirror (50/50 mirror) 926 may be provided on a first surface of the first optical element (L1 S1).
  • Diagram 900C of Figure 9C shows a second example configuration, where the quarter wave layer (QW) 924 may be provided on the second surface of the first optical element (L2S1), the reflective polarizer layer (RP) 922 may be provided on the quarter wave layer (QW) 924, and the semi-transparent mirror (50/50 mirror) 926 may be provided on the first surface of the first optical element (L1 S1 ).
  • the second optical element (L2) 914 may function as an aberration correction lens.
  • Diagram 900D of Figure 9D shows a third example configuration, where the quarter wave layer (QW) 924 may be provided on the second surface of the second optical element (L2S2), the reflective polarizer layer (RP) 922 may be provided on the quarter wave layer (QW) 924, and the semi-transparent mirror (50/50 mirror) 926 may be provided on the second surface of the first optical element (L2S1 ).
  • Diagram 900E of Figure 9E shows a fourth example configuration, where the reflective polarizer layer (RP) 922 may be provided on the first surface of the second optical element (L1 S2), the quarter wave layer (QW) 924 may be provided on the reflective polarizer layer (RP) 922, and the semi-transparent mirror (50/50 mirror) 926 may be provided on the first surface of the first optical element (L1 S1).
  • Figure 10A illustrates an assembly system to provide a head-mount display (HMD) device with an optical lens configuration, according to an example.
  • Diagram 1000A shows a controller 1002 managing operations of individual assembly units including a lens unit 1004, a reflective polarizer unit 1006, a quarter wave unit 1008, a semi-transparent (50/50) mirror unit 1010, and an assembly unit 1012.
  • Individual optical elements e.g., first optical element and second optical element
  • a quarter wave layer may be applied to one of the surfaces of one of the optical elements or over the reflective polarizer layer by quarter wave unit 1008 followed by application of the semi-transparent mirror (1026) on one of the surfaces of one of the optical elements by the semi-transparent (50/50) mirror unit 1010.
  • the treated lenses may be assembled (1030) together to form an optical lens configuration and then assembled together with the remaining components of the head-mount display (HMD) device 1032 by the assembly unit 1012.
  • the lens unit 1004 may provide the optical elements (e.g., first optical element and second optical element) using any suitable optical material, but not limited to, glass, optical grade plastics such as poly-methyl- methacrylate (PM MA), cyclic-olefin-copolymer (COC), cyclo-olefin-polymer (COP), monomer plastic, polymer plastic, polycarbonate (PC), epoxy, polyester, optical nylon, etc.
  • the optical elements may be provided using casting, injection molding, compression molding, machining, polishing, and/or similar methods or techniques.
  • the reflective polarizer unit 1006 may provide the reflective polarizer layer on a surface of one of the optical elements using birefringent material such as calcite, linear polymer film (e.g., polyvinyl alcohol “PVA” based), a modified polycarbonate, or similar.
  • birefringent material such as calcite, linear polymer film (e.g., polyvinyl alcohol “PVA” based), a modified polycarbonate, or similar.
  • PVA polyvinyl alcohol
  • the reflective polarizer layer may be provided using lamination, spraying, and/or similar methods or techniques.
  • the quarter wave unit 1008 may provide the quarter wave layer on a surface of the optical elements (or on the reflective polarizer layer) using materials such as quartz (crystalline SiO2), mica, or modified polycarbonates.
  • the quarter wave layer may be formed as a separate layer and laminated or otherwise affixed to the surface of the optical element or the reflective polarizer layer as a thickness of the quarter wave layer is a critical characteristic that may need to be adjusted with high precision.
  • the semi-transparent (50/50) mirror unit 1010 may provide the semi-transparent mirror on a surface of one of the optical elements by applying a thin layer of metal (e.g., aluminum, silver, gold, or similar) onto a thin layer of glass or a transparent polymer material, and then laminating or similarly affixing the mirror to the optical element surface.
  • the mirror may be formed on the surface of the optical element layer by layer by using suitable application techniques such as injection, lamination, spraying, vapor deposition, etc.
  • an optical lens configuration may include an assembly of two optical elements attached together with an air gap in-between. Contrary to conventional doublet lens structures, which commonly utilize two lenses cemented together without a gap or a liquid (e.g., oil) filled gap, an example, optical lens configuration may be assembled by affixing the two optical elements mechanically or chemically (e.g., gluing) along their peripheral edges. In some examples, an inert gas or similar may also be used to fill the gap instead of air.
  • Figure 10B illustrates an assembly system to provide a head-mount display (HMD) device with an optical assembly including a focus element, a transparent display, and a compensation element, according to an example.
  • Diagram 1000B shows a controller 1052 managing operations of individual assembly units including a focus element unit 1054, a display unit 1056, a compensation element unit 1058, and an assembly unit 1060.
  • the focus element unit 1054 may provide (1062) any alternative implementation of the focus element 402 such as metalens 404, light field lens 406, solid lens 408, or optical configuration 410 (hollow singlet optical lens configuration).
  • the display unit 1056 may provide (1064) a transparent and curved display 310, which may be shaped according to the configuration of the components.
  • the compensation element unit 1058 may provide (1066) a compensation element 312 such as a free-form phase plate.
  • the individual components of the optical assembly may be assembled (1068) along with other parts of a head-mount display (HMD) device 1070 by the assembly unit 1060.
  • HMD head-mount display
  • the modules (stations) of example head-mount display (HMD) assembly systems to produce head-mount display (HMD) devices with optical lens configurations or with a focus element, a transparent display, and a compensation element as described herein are for illustration purposes and do not imply limitations on the assembly system. Some of the modules may be implemented as a single station performing any number of functions at any number of stages of assembly. An order of the modules (i.e., assembly steps) may be different than shown in the diagram. The assembly system may also be implemented using fewer or additional modules using the principles described herein.
  • FIG. 11A illustrates a flowchart 1100A of a method to assemble a head-mount display (HMD) device with an optical lens configuration, according to an example.
  • HMD head-mount display
  • Each block shown in FIG. 11A may further represent one or more processes, methods, or subroutines, and one or more of the blocks may include machine-readable instructions stored on a non-transitory computer readable medium and executed by a processor or other type of processing circuit to perform one or more operations described herein.
  • first optical element (L1 ) 804 and second optical element (L2) 802 may be provided using any suitable optical material, but not limited to, glass, optical grade plastics such as poly-methyl-methacrylate (PMMA), cyclic-olefin- copolymer (COC), cyclo-olefin-polymer (COP), monomer plastic, polymer plastic, polycarbonate (PC), epoxy, polyester, optical nylon, etc.
  • the optical elements may be provided using casting, injection molding, compression molding, machining, polishing, and/or similar methods or techniques.
  • the reflective polarizer layer 806 may be provided on a surface of either the first optical element (L1) 804 or the second optical element (L2) 802 using lamination, spraying, and/or similar methods or techniques.
  • the quarter wave layer 808 may be provided on one of the surfaces of either the first optical element (L1 ) 804 or the second optical element (L2) 802 or on the reflective polarizer layer 806.
  • the quarter wave layer 808 may be formed as a separate layer and laminated or otherwise affixed to the surface of one of the optical elements or the reflective polarizer layer.
  • the semi-transparent mirror 810 may be provided on one of the surfaces of either the first optical element (L1 ) 804 or the second optical element (L2) 802 by applying a thin layer of metal (e.g., aluminum, silver, gold, or similar) onto a thin layer of glass or a transparent polymer material, and then laminating or similarly affixing the mirror to the optical element surface.
  • a thin layer of metal e.g., aluminum, silver, gold, or similar
  • the treated optical elements may be assembled together to form the optical lens configuration.
  • the optical lens configuration may be assembled by affixing the two optical elements mechanically or chemically (e.g., gluing) along their edges. In some examples, an inert gas or similar may also be used to fill the gap instead of air.
  • the head-mount display (HMD) device 1032 may be assembled by combining any number of electronic, mechanical, and optical parts such as the optical lens configuration, body 102, head strap 110, and other components.
  • FIG. 11 B illustrates a flowchart 1100B of a method to assemble a head-mount display (H D) device with an optical assembly including a focus element, a transparent display, and a compensation element, according to an example.
  • Each block shown in FIG. 11 B may further represent one or more processes, methods, or subroutines, and one or more of the blocks may include machine-readable instructions stored on a non-transitory computer readable medium and executed by a processor or other type of processing circuit to perform one or more operations described herein
  • alternative implementations of the focus element 402 such as metalens 404, light field lens 406, solid lens 408, or optical configuration 410 (hollow singlet optical lens configuration) may be provided by a focus element unit 1054.
  • the focus element may be formed by the focus element unit 1054 (e.g., affixing of two optical lens elements and application of reflective polarizer, quarter wave, and semi-transparent mirror layers in case of the optical configuration 410 alternative).
  • the focus element 402 may be formed elsewhere and provided for assembly with the other components by the focus element unit 1054.
  • a transparent, curved display 310 may be provided by display unit 1056.
  • a transparent display is an electronic display that may allow the user to see what is shown on the screen while still being able to see through the display.
  • a curved display is a display technology that features three-dimensional (3D) screens instead of traditional two-dimensional (2D) screens.
  • the display’s shape and size may be selected to match the focus element and/or the compensation element.
  • the display may be a flexible display and formed to shape based on the other components.
  • the display may have a fixed shape and/or size, and the focus element and the compensation element may be selected in shape and size to match the display.
  • a compensation element 312 may be provided by the compensation element unit 1058.
  • the compensation element may be a free-form phase plate, for example, and used to adjust a phase of the light from the environment 318.
  • the individual components of the optical assembly, aligned around the primary axis 306, may be assembled along with other mechanical, optical, and electronic parts of the head-mounted display (HMD) device 1070.
  • HMD head-mounted display
  • an optical assembly may include a compensation element to modify a phase of a first light arriving from an environment outside a head-mounted display (HMD) device; a transparent display to present an image or a video and to pass through the phase-modified first light; and a focus element to focus the phase-modified first light and a second light from the transparent display on an eyebox, where the optical assembly is to reduce one or more aberrations in the first light or the second light.
  • HMD head-mounted display
  • the compensation element may include a free-form phase plate, a zoom focus lens, or a liquid lens.
  • the compensation element may have a substantially similar optical focus power as that of the focus element, but with a reverse sign, or the compensation element may have a different focus power as that of the focus element to correct one or more of a myopia, a hyperopia, or an astigmatism.
  • the compensation element may be fabricated through one or more of cylindrical coordinate machining, etching, photolithography, grinding, raster flycutting, or a holography technique.
  • the focus element may include a metalens, a light field lens, a solid optical lens, or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may include a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • the transparent display may have a curvature comprising a spherical curvature, a cylindrical curvature, or a combination thereof.
  • a shape and a size of the transparent display may be selected based, at least in part, on one or more of a shape and a size of the compensation element or a shape and a size of the focus element.
  • the transparent display, the compensation element, and the focus element may be aligned along a primary optical axis of the head-mounted display (HMD) device.
  • HMD head-mounted display
  • a head-mounted display (HMD) device may include a body comprising a transparent front side and an optical assembly within the body.
  • the optical assembly may include a compensation element to modify a phase of a first light arriving from an environment outside the head-mounted display (HMD) device; a transparent display to present an image or a video and to pass through the phase-modified first light; and a focus element to focus the phase-modified first light and a second light from the transparent display on an eyebox, where the optical assembly is to reduce one or more aberrations in the first light or the second light.
  • the compensation element may include a free-form phase plate, a zoom focus lens, or a liquid lens.
  • the focus element may include a metalens, a light field lens, a solid optical lens, or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may include a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • the compensation element may have a substantially similar optical focus power as that of the focus element, but with a reverse sign, or the compensation element may have a different focus power as that of the focus element to correct one or more of a myopia, a hyperopia, or an astigmatism.
  • the transparent display, the compensation element, and the focus element may be aligned along a primary optical axis of the head-mounted display (HMD) device.
  • HMD head-mounted display
  • a method for a head-mounted display (HMD) device may include modifying, at a compensation element, a phase of a first light arriving at the compensation element from an environment outside the headmounted display (HMD) device; providing an image or a video, by a transparent display, while allowing the phase-modified first light to pass through the transparent display; and focusing, at a focus element, the phase-modified first light and a second light from the transparent display on an eyebox, where the compensation element and the focus element are to reduce one or more aberrations in the first light or the second light.
  • the method may further include focusing, by the compensation element, an optical power from the focus element; or correcting, by the compensation element, one or more of a myopia, a hyperopia, or an astigmatism.
  • the compensation element may include a free-form phase plate, a zoom focus lens, or a liquid lens.
  • the focus element may include a metalens, a light field lens, a solid optical lens, or an optical configuration comprising two optical elements with an air gap between the two optical elements.
  • the light field lens may include a microlens array, a liquid lens, a zoom focusing lens, or a liquid crystal lens.
  • a system and/or a method of making an optical assembly as described herein may also be provided.
  • a non-transitory computer-readable storage medium may have an executable stored thereon, which when executed may instruct a processor to perform the methods of making an optical assembly and/or a head-mounted display (HMD) device as described herein.
  • HMD head-mounted display

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

Selon des exemples, un ensemble optique pour un dispositif de visiocasque (HMD) peut comprendre un élément de compensation (312) pour modifier une phase d'une première lumière (318) arrivant d'un environnement à l'extérieur du dispositif de visiocasque (HMD) ; un dispositif d'affichage transparent (310) pour présenter une image ou une vidéo et pour passer à travers la première lumière à phase modifiée (318) ; et un élément de focalisation (308) pour focaliser la première lumière à phase modifiée (318) et une seconde lumière (316) à partir du dispositif d'affichage transparent sur une région oculaire (304). L'ensemble optique peut réduire une ou plusieurs aberrations dans la première lumière (318) ou la seconde lumière (316). L'élément de focalisation (308) peut être une métalentile, une lentille de champ lumineux, une lentille optique solide, ou une configuration optique avec deux éléments optiques comprenant un entrefer entre les deux éléments optiques. L'élément de compensation (312) peut être une plaque de phase de forme libre.
PCT/US2023/018444 2022-04-13 2023-04-13 Ensemble optique pour dispositif de visiocasque (hmd) WO2023200920A1 (fr)

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US63/330,411 2022-04-13
US17/988,638 US20230333382A1 (en) 2022-04-13 2022-11-16 Optical assembly for a head-mount display (hmd) device
US17/988,638 2022-11-16

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160313558A1 (en) * 2015-04-26 2016-10-27 Roman Gutierrez Near-eye light-field display system
US20160320559A1 (en) * 2015-04-28 2016-11-03 Oculus Vr, Llc Curved electronic display element
US20200225477A1 (en) * 2019-01-15 2020-07-16 Apple Inc. Display System With Virtual Image Distance Adjustment and Corrective Lenses
US20200400943A1 (en) * 2019-06-19 2020-12-24 Amalgamated Vision, Llc Wearable display for near-to-eye viewing with expanded beam
US10890776B1 (en) * 2019-02-19 2021-01-12 Facebook Technologies, Llc Pancake lens ghosting mitigation
US20210048674A1 (en) * 2019-08-13 2021-02-18 Apple Inc. Display Systems With Geometrical Phase Lenses
US20210124177A1 (en) * 2017-03-22 2021-04-29 Magic Leap, Inc. Dynamic field of view variable focus display system
US20220019080A1 (en) * 2018-11-27 2022-01-20 Vuzix Corporation Near focus corrective ar glasses

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160313558A1 (en) * 2015-04-26 2016-10-27 Roman Gutierrez Near-eye light-field display system
US20160320559A1 (en) * 2015-04-28 2016-11-03 Oculus Vr, Llc Curved electronic display element
US20210124177A1 (en) * 2017-03-22 2021-04-29 Magic Leap, Inc. Dynamic field of view variable focus display system
US20220019080A1 (en) * 2018-11-27 2022-01-20 Vuzix Corporation Near focus corrective ar glasses
US20200225477A1 (en) * 2019-01-15 2020-07-16 Apple Inc. Display System With Virtual Image Distance Adjustment and Corrective Lenses
US10890776B1 (en) * 2019-02-19 2021-01-12 Facebook Technologies, Llc Pancake lens ghosting mitigation
US20200400943A1 (en) * 2019-06-19 2020-12-24 Amalgamated Vision, Llc Wearable display for near-to-eye viewing with expanded beam
US20210048674A1 (en) * 2019-08-13 2021-02-18 Apple Inc. Display Systems With Geometrical Phase Lenses

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