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WO2025212393A1 - Affichages à réalité augmentée polarisés - Google Patents

Affichages à réalité augmentée polarisés

Info

Publication number
WO2025212393A1
WO2025212393A1 PCT/US2025/021905 US2025021905W WO2025212393A1 WO 2025212393 A1 WO2025212393 A1 WO 2025212393A1 US 2025021905 W US2025021905 W US 2025021905W WO 2025212393 A1 WO2025212393 A1 WO 2025212393A1
Authority
WO
WIPO (PCT)
Prior art keywords
waveguide
display system
reflective
image light
reflective element
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/US2025/021905
Other languages
English (en)
Inventor
Andrew John Ouderkirk
Tingling Rao
Siddharth BUDDHIRAJU
Zhaoyu NIE
Liliana Ruiz Diaz
Prathmesh DESHMUKH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meta Platforms Technologies LLC
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
Application filed by Meta Platforms Technologies LLC filed Critical Meta Platforms Technologies LLC
Publication of WO2025212393A1 publication Critical patent/WO2025212393A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • G02B2027/0174—Head mounted characterised by optical features holographic

Definitions

  • This application relates to a system for polarized augmented reality displays.
  • a display system comprising: a waveguide body extending from an input end to an output end and configured to guide light by total internal reflection from the input end to the output end; an in-coupling element located proximate to the input end and configured to direct image light into the waveguide body; an out-coupling element located proximate to the output end and configured to direct image light out of the waveguide body; and a reflective element located on a world side of the waveguide body, wherein the reflective element is configured to direct image light out- coupled from the waveguide body toward a user's eyes.
  • the waveguide body comprises an optically isotropic material.
  • the waveguide body comprises an optically anisotropic material.
  • the waveguide body comprises an organic solid crystal.
  • the out-coupling element comprises an optically isotropic material.
  • the out-coupling element comprises a surface relief grating.
  • the out-coupling element comprises a structured diffraction grating selected from the group consisting of binary, slanted, and blazed.
  • the reflective element overlies the output end of the waveguide body.
  • the reflective element is spaced away from the out-coupling element.
  • the reflective element contacts the out-coupling element.
  • the reflective element comprises an optical element selected from the group consisting of a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • the reflective element comprises a notch dichroic mirror and quarter waveplate overlying the notch dichroic mirror.
  • the display system further comprises a notch reflective polarizer located on a user side of the waveguide body.
  • a display system comprising: a waveguide configured to propagate image light therethrough; an out-coupling element disposed over an output region of the waveguide, wherein the out-coupling element is configured to out-couple the image light from the waveguide; and a reflective element located between the waveguide and a world side of the display system, wherein the reflective element is configured to direct the out-coupled image light toward an eye of a user.
  • the waveguide comprises an optically anisotropic material.
  • the waveguide comprises an organic solid crystal.
  • the out-coupling element comprises an optically anisotropic material.
  • the reflective element comprises an optical element selected from the group consisting of a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • a display system comprising: a waveguide configured to propagate image light therethrough; and a reflective element located between the waveguide and a world side of the display system, wherein the reflective element comprises an optical element selected from the group consisting of a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer, and the reflective element is configured to direct image light out-coupled from the waveguide toward an eye of a user.
  • FIG. 1 is an illustration of an exemplary waveguide with grating structures to couple light into and out of the waveguide according to some embodiments.
  • FIG. 2 is an illustration of an exemplary waveguide with grating structures to couple light into a birefringent waveguide substrate and grating structures to outcouple polarized light from the birefringent substrate according to various embodiments.
  • FIG. 3 is an illustration of an exemplary waveguide with grating structures to couple light into an isotropic or anisotropic waveguide substrate and birefringent grating structures to outcouple polarized light from the waveguide substrate according to various embodiments.
  • FIG. 4 depicts momentum space renderings and the outcoupling of polarized light from an example waveguide according to certain embodiments.
  • FIG. 7 is an illustration of exemplary augmented-reality glasses that may be used in connection with embodiments of this disclosure.
  • a waveguide display system for VR and AR applications may include a micro-display module and waveguide optics for directing a display image to a user.
  • the micro-display module may include a light source, such as a light emitting diode (LED).
  • the waveguide optics may include input-coupling and output-coupling elements such as surface relief gratings that are configured to couple light into and out of the waveguide.
  • Example grating structures may have a one-dimensional or two-dimensional periodicity, and may include a binary, slanted, or blazed architecture.
  • Organic solid crystal (OSC) materials with high refractive index and birefringence can be used for various optical components, including surface relief gratings, meta-surfaces, waveguides, beam splitting, photonic elements such as photonic integrated circuits, and polarization selective elements.
  • an augmented reality display may include an OSC-based waveguide.
  • Organic solid crystal (OSC) materials may be incorporated into monolithic bodies, such as optical elements (e.g., lenses, waveguides, and the like) and other structures. For instance, particles of an OSC material may be manufactured and consolidated/densified to form an optical element.
  • An optical element formed from an organic solid crystal material may be configured to provide one or more advantageous characteristics, including one or more of a controllable refractive index and birefringence, optical clarity, and optical transparency.
  • organic optically anisotropic materials include anthracene, polycene, triazole, thiophene, as well as derivatives thereof.
  • Example inorganic optically anisotropic materials include SiC>2, TiCh, GazCh, LiNbC , SiC, and ZnS.
  • an optically anisotropic material may be characterized by a refractive index difference between at least one pair of principal axes of at least approximately 0.1, e.g., 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9, including ranges between any of the foregoing values.
  • a grating may overlie a waveguide substrate through which an electromagnetic wave may propagate.
  • the waveguide substrate includes or is formed from an organic solid crystal material.
  • the substrate may include a single phase OSC material.
  • the substrate may include a single organic solid crystal layer or an OSC multilayer.
  • the characteristic refractive indices (m, n2, ns) may be aligned or askew with respect to the principal dimensions of the substrate.
  • the waveguide substrate may include an OSC material with either a fixed optical axis or a spatially varying optical axis.
  • FIG. 1 includes a description of an example waveguide with grating structures to in-couple and out-couple image light from a waveguide substrate.
  • FIGS. 2 and 3 includes a description of planar waveguides having light polarizing configurations.
  • electromagnetic waves are confined to propagate along the plane of the waveguide, whereas in non-planar waveguides, the waves may follow a curved path, guided by the shape of the waveguide.
  • the discussion associated with FIG. 4 includes momentum space renderings depicting the diffraction of image light from birefringent materials or structures.
  • the discussion associated with FIGS. 5 and 6 includes a description of planar waveguides having a reflective optical element for recycling leaked polarized image light.
  • the discussion associated with FIGS. 7 and 8 relates to exemplary virtual reality and augmented reality devices that may include one or more waveguide configurations as disclosed herein.
  • FIG. 1 A schematic view of a display system 100 including a planar waveguide is shown in FIG. 1.
  • An input grating 110 is configured to couple image light into a waveguide substrate
  • an output grating 120 is configured to couple the internally reflected image light out of the waveguide and toward both a user's eye 130 and the world side 140 of the display system.
  • a field of view reaching an eyebox of the display may be 50° x 50°, for example.
  • the reflective element 500 may include a structure selected from a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • the reflective element 500 may include a notch dichroic mirror and quarter waveplate (QWP) located on the world side of the waveguide.
  • the display may additionally include a notch reflective polarizer 510 disposed on the user side.
  • the dichroic mirror may be curved or flat and may have matching notch characteristics with the notch reflective polarizer 510.
  • polarized light emitted toward the world side of the display may be redirected by the QWP and dichroic mirror back to the user.
  • Light emitted toward the user side of the display may be initially reflected by the reflective polarizer but subsequently redirected by the QWP and dichroic mirror back to the user.
  • the generation of polarized image light allows for efficient redirection of leaked world side light while maintaining commercially-relevant see-through transmission.
  • the waveguides in FIGS. 2, 3, 5, and 6 are depicted as having a planar surface (i.e., abutting the grating structures), non-planar waveguide surfaces are also contemplated where, for example, a curvature of the reflective element may match a curvature of the waveguide.
  • Example 1 A display system includes a waveguide body extending from an input end to an output end and configured to guide light by total internal reflection from the input end to the output end, an in-coupling element located proximate to the input end and configured to direct image light into the waveguide body, an out-coupling element located proximate to the output end and configured to direct image light out of the waveguide body, and a reflective element located on a world side of the waveguide body, where the reflective element is configured to direct image light out-coupled from the waveguide body toward a user's eyes.
  • Example 2 The display system of Example 1, where the waveguide body includes an optically isotropic material.
  • Example 3 The display system of Example 1, where the waveguide body includes an optically anisotropic material.
  • Example 4 The display system of any of Examples 1-3, where the waveguide body includes an organic solid crystal.
  • Example 5 The display system of any of Examples 1-4, where the out-coupling element includes an optically isotropic material.
  • Example 6 The display system of any of Examples 1-4, where the out-coupling element includes an optically anisotropic material.
  • Example 7 The display system of any of Examples 1-6, where the out-coupling element includes a surface relief grating.
  • Example 8 The display system of Example 7, where the out-coupling element includes a structured diffraction grating selected from a binary grating, a slanted grating, and a blazed grating.
  • Example 9 The display system of any of Examples 1-8, where the reflective element overlies the output end of the waveguide body.
  • Example 11 The display system of any of Examples 1-9, where the reflective element contacts the out-coupling element.
  • Example 12 The display system of any of Examples 1-11, where the reflective element includes an optical element selected from a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • the reflective element includes an optical element selected from a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • Example 13 The display system of any of Examples 1-12, where the reflective element includes a notch dichroic mirror and quarter waveplate overlying the notch dichroic mirror.
  • Example 14 The display system of Example 13, further including a notch reflective polarizer located on a user side of the waveguide body.
  • a display system includes a waveguide configured to propagate image light therethrough, an out-coupling element disposed over an output region of the waveguide, where the out-coupling element is configured to out-couple the image light from the waveguide, and a reflective element located between the waveguide and a world side of the display system, where the reflective element is configured to direct the out-coupled image light toward an eye of a user.
  • Example 16 The display system of Example 15, where the waveguide includes an optically anisotropic material.
  • Example 17 The display system of any of Examples 15 and 16, where the waveguide includes an organic solid crystal.
  • Example 18 The display system of any of Examples 15-17, where the out-coupling element includes an optically anisotropic material.
  • Example 19 The display system of any of Examples 15-18, where the reflective element includes an optical element selected from a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • the reflective element includes an optical element selected from a partial reflector, a spectral notch reflector, a reflective polarizer, and a spectral notch reflective polarizer.
  • Embodiments of the present disclosure may include or be implemented in conjunction with various types of artificial-reality systems.
  • Artificial reality is a form of reality that has been adjusted in some manner before presentation to a user, which may include, for example, a virtual reality, an augmented reality, a mixed reality, a hybrid reality, or some combination and/or derivative thereof.
  • Artificial-reality content may include completely computer-generated content or computer-generated content combined with captured (e.g., real-world) content.
  • the artificial-reality content may include video, audio, haptic feedback, or some combination thereof, any of which may be presented in a single channel or in multiple channels (such as stereo video that produces a three-dimensional (3D) effect to the viewer).
  • artificial reality may also be associated with applications, products, accessories, services, or some combination thereof, that are used to, for example, create content in an artificial reality and/or are otherwise used in (e.g., to perform activities in) an artificial reality.
  • augmented-reality system 700 may include an eyewear device 702 with a frame 710 configured to hold a left display device 715(A) and a right display device 715(B) in front of a user's eyes.
  • Display devices 715(A) and 715(B) may act together or independently to present an image or series of images to a user.
  • augmented-reality system 700 includes two displays, embodiments of this disclosure may be implemented in augmented-reality systems with a single NED or more than two NEDs.
  • augmented-reality system 700 may include one or more sensors, such as sensor 740.
  • Sensor 740 may generate measurement signals in response to motion of augmented-reality system 700 and may be located on substantially any portion of frame 710.
  • Sensor 740 may represent a position sensor, an inertial measurement unit (IMU), a depth camera assembly, a structured light emitter and/or detector, or any combination thereof.
  • IMU inertial measurement unit
  • augmented-reality system 700 may or may not include sensor 740 or may include more than one sensor.
  • the IMU may generate calibration data based on measurement signals from sensor 740.
  • Examples of sensor 740 may include, without limitation, accelerometers, gyroscopes, magnetometers, other suitable types of sensors that detect motion, sensors used for error correction of the IMU, or some combination thereof.
  • Augmented-reality system 700 may also include a microphone array with a plurality of acoustic transducers 720(A)-720(J), referred to collectively as acoustic transducers 720.
  • Acoustic transducers 720 may be transducers that detect air pressure variations induced by sound waves.
  • Each acoustic transducer 720 may be configured to detect sound and convert the detected sound into an electronic format (e.g., an analog or digital format).
  • the configuration of acoustic transducers 720 of the microphone array may vary. While augmented-reality system 700 is shown in FIG. 7 as having ten acoustic transducers 720, the number of acoustic transducers 720 may be greater or less than ten. In some embodiments, using higher numbers of acoustic transducers 720 may increase the amount of audio information collected and/or the sensitivity and accuracy of the audio information. In contrast, using a lower number of acoustic transducers 720 may decrease the computing power required by an associated controller 750 to process the collected audio information. In addition, the position of each acoustic transducer 720 of the microphone array may vary. For example, the position of an acoustic transducer 720 may include a defined position on the user, a defined coordinate on frame 710, an orientation associated with each acoustic transducer 720, or some combination thereof.
  • acoustic transducers 720(A) and 720(B) may not be used at all in conjunction with augmented-reality system 700.
  • Acoustic transducers 720 on frame 710 may be positioned along the length of the temples, across the bridge, above or below display devices 715(A) and 715(B), or some combination thereof.
  • Acoustic transducers 720 may be oriented such that the microphone array is able to detect sounds in a wide range of directions surrounding the user wearing the augmented-reality system 700.
  • an optimization process may be performed during manufacturing of augmented-reality system 700 to determine relative positioning of each acoustic transducer 720 in the microphone array.
  • augmented-reality system 700 may include or be connected to an external device (e.g., a paired device), such as neckband 705.
  • an external device e.g., a paired device
  • Neckband 705 generally represents any type or form of paired device.
  • the following discussion of neckband 705 may also apply to various other paired devices, such as charging cases, smart watches, smart phones, wrist bands, other wearable devices, hand-held controllers, tablet computers, laptop computers, other external compute devices, etc.
  • Neckband 705 may be communicatively coupled with eyewear device 702 and/or to other devices. These other devices may provide certain functions (e.g., tracking, localizing, depth mapping, processing, storage, etc.) to augmented-reality system 700.
  • neckband 705 may include two acoustic transducers (e.g., 720(1) and 720(J)) that are part of the microphone array (or potentially form their own microphone subarray).
  • Neckband 705 may also include a controller 725 and a power source 735.
  • Acoustic transducers 720(1) and 720(J) of neckband 705 may be configured to detect sound and convert the detected sound into an electronic format (analog or digital).
  • acoustic transducers 720(1) and 720(J) may be positioned on neckband 705, thereby increasing the distance between the neckband acoustic transducers 720(1) and 720(1) and other acoustic transducers 720 positioned on eyewear device 702.
  • increasing the distance between acoustic transducers 720 of the microphone array may improve the accuracy of beamforming performed via the microphone array.
  • Controller 725 of neckband 705 may process information generated by the sensors on neckband 705 and/or augmented-reality system 700.
  • controller 725 may process information from the microphone array that describes sounds detected by the microphone array. Foreach detected sound, controller 725 may perform a direction-of-arrival (DOA) estimation to estimate a direction from which the detected sound arrived at the microphone array. As the microphone array detects sounds, controller 725 may populate an audio data set with the information.
  • controller 725 may compute all inertial and spatial calculations from the IMU located on eyewear device 702.
  • a connector may convey information between augmented-reality system 700 and neckband 705 and between augmented-reality system 700 and controller 725. The information may be in the form of optical data, electrical data, wireless data, or any other transmittable data form. Moving the processing of information generated by augmented-reality system 700 to neckband 705 may reduce weight and heat in eyewear device 702, making it more comfortable to the user.
  • Power source 735 in neckband 705 may provide power to eyewear device 702 and/or to neckband 705.
  • Power source 735 may include, without limitation, lithium ion batteries, lithium-polymer batteries, primary lithium batteries, alkaline batteries, or any other form of power storage.
  • power source 735 may be a wired power source. Including power source 735 on neckband 705 instead of on eyewear device 702 may help better distribute the weight and heat generated by power source 735.
  • some artificial-reality systems may, instead of blending an artificial reality with actual reality, substantially replace one or more of a user's sensory perceptions of the real world with a virtual experience.
  • a head-worn display system such as virtual-reality system 800 in FIG. 8, that mostly or completely covers a user's field of view.
  • Virtual-reality system 800 may include a front rigid body 802 and a band 804 shaped to fit around a user's head.
  • Virtual-reality system 800 may also include output audio transducers 806(A) and 806(B).
  • front rigid body 802 may include one or more electronic elements, including one or more electronic displays, one or more inertial measurement units (IMUs), one or more tracking emitters or detectors, and/or any other suitable device or system for creating an artificial reality experience.
  • IMUs inertial measurement units
  • Artificial-reality systems may include a variety of types of visual feedback mechanisms.
  • display devices in augmented-reality system 700 and/or virtual-reality system 800 may include one or more liquid crystal displays (LCDs), light emitting diode (LED) displays, organic LED (OLED) displays, digital light project (DLP) micro-displays, liquid crystal on silicon (LCoS) micro-displays, and/or any other suitable type of display screen.
  • LCDs liquid crystal displays
  • LED light emitting diode
  • OLED organic LED
  • DLP digital light project
  • LCD liquid crystal on silicon
  • Artificial-reality systems may include a single display screen for both eyes or may provide a display screen for each eye, which may allow for additional flexibility for varifocal adjustments or for correcting a user's refractive error.
  • Some artificial-reality systems may also include optical subsystems having one or more lenses (e.g., conventional concave or convex lenses, Fresnel lenses, adjustable liquid lenses, etc.) through which a user may view a display screen.
  • These optical subsystems may serve a variety of purposes, including to collimate (e.g., make an object appear at a greater distance than its physical distance), to magnify (e.g., make an object appear larger than its actual size), and/or to relay (to, e.g., the viewer's eyes) light.
  • optical subsystems may be used in a non-pupil-forming architecture (such as a single lens configuration that directly collimates light but results in so-called pincushion distortion) and/or a pupil-forming architecture (such as a multi-lens configuration that produces so- called barrel distortion to nullify pincushion distortion).
  • a non-pupil-forming architecture such as a single lens configuration that directly collimates light but results in so-called pincushion distortion
  • a pupil-forming architecture such as a multi-lens configuration that produces so- called barrel distortion to nullify pincushion distortion
  • some artificial-reality systems may include one or more projection systems.
  • display devices in augmented-reality system 700 and/or virtual-reality system 800 may include micro-LED projectors that project light (using, e.g., a waveguide) into display devices, such as clear combiner lenses that allow ambient light to pass through.
  • the display devices may refract the projected light toward a user's pupil and may enable a user to simultaneously view both artificial-reality content and the real world.
  • the display devices may accomplish this using any of a variety of different optical components, including waveguide components (e.g., holographic, planar, diffractive, polarized, and/or reflective waveguide elements), light-manipulation surfaces and elements (such as diffractive, reflective, and refractive elements and gratings), coupling elements, etc.
  • waveguide components e.g., holographic, planar, diffractive, polarized, and/or reflective waveguide elements
  • light-manipulation surfaces and elements such as diffractive, reflective, and refractive elements and gratings
  • coupling elements etc.
  • Artificial-reality systems may also be configured with any other suitable type or form of image projection system, such as retinal projectors used in virtual retina displays.
  • Artificial-reality systems may also include various types of computer vision components and subsystems.
  • augmented-reality system 700 and/or virtual- reality system 800 may include one or more optical sensors, such as two-dimensional (2D) or 3D cameras, structured light transmitters and detectors, time-of-f light depth sensors, singlebeam or sweeping laser rangefinders, 3D LiDAR sensors, and/or any other suitable type or form of optical sensor.
  • An artificial-reality system may process data from one or more of these sensors to identify a location of a user, to map the real world, to provide a user with context about real-world surroundings, and/or to perform a variety of other functions.
  • Artificial-reality systems may also include one or more input and/or output audio transducers.
  • output audio transducers 806(A) and 806(B) may include voice coil speakers, ribbon speakers, electrostatic speakers, piezoelectric speakers, bone conduction transducers, cartilage conduction transducers, tragus-vibration transducers, and/or any other suitable type or form of audio transducer.
  • input audio transducers may include condenser microphones, dynamic microphones, ribbon microphones, and/or any other type or form of input transducer.
  • a single transducer may be used for both audio input and audio output.
  • artificial-reality systems may include tactile (i.e., haptic) feedback systems, which may be incorporated into headwear, gloves, body suits, handheld controllers, environmental devices (e.g., chairs, floormats, etc.), and/or any other type of device or system.
  • Haptic feedback systems may provide various types of cutaneous feedback, including vibration, force, traction, texture, and/or temperature.
  • Haptic feedback systems may also provide various types of kinesthetic feedback, such as motion and compliance.
  • Haptic feedback may be implemented using motors, piezoelectric actuators, fluidic systems, and/or a variety of other types of feedback mechanisms.
  • Haptic feedback systems may be implemented independent of other artificial-reality devices, within other artificial-reality devices, and/or in conjunction with other artificial-reality devices.
  • artificial-reality systems may create an entire virtual experience or enhance a user's real-world experience in a variety of contexts and environments. For instance, artificial-reality systems may assist or extend a user's perception, memory, or cognition within a particular environment. Some systems may enhance a user's interactions with other people in the real world or may enable more immersive interactions with other people in a virtual world.
  • Artificial-reality systems may also be used for educational purposes (e.g., for teaching or training in schools, hospitals, government organizations, military organizations, business enterprises, etc.), entertainment purposes (e.g., for playing video games, listening to music, watching video content, etc.), and/or for accessibility purposes (e.g., as hearing aids, visual aids, etc.).
  • the embodiments disclosed herein may enable or enhance a user's artificial-reality experience in one or more of these contexts and environments and/or in other contexts and environments.
  • numeric value "50" as “approximately 50” may, in certain embodiments, include values equal to 50 ⁇ 5, i.e., values within the range 45 to 55.
  • the term "substantially" in reference to a given parameter, property, or condition may mean and include to a degree that one of ordinary skill in the art would understand that the given parameter, property, or condition is met with a small degree of variance, such as within acceptable manufacturing tolerances.
  • the parameter, property, or condition may be at least approximately 90% met, at least approximately 95% met, or even at least approximately 99% met.
  • transitional phrase "comprising” it is to be understood that alternative embodiments, including those that may be described using the transitional phrases “consisting of” or “consisting essentially of,” are implied.
  • implied alternative embodiments to a lens that comprises or includes polycarbonate include embodiments where a lens consists essentially of polycarbonate and embodiments where a lens consists of polycarbonate.

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Abstract

Est divulgué un système d'affichage comprenant un corps de guide d'ondes s'étendant d'une extrémité d'entrée à une extrémité de sortie et configuré pour guider la lumière par réflexion interne totale de l'extrémité d'entrée à l'extrémité de sortie, un élément de couplage situé à proximité de l'extrémité d'entrée et configuré pour diriger la lumière d'image dans le corps de guide d'ondes, un élément de découplage situé à proximité de l'extrémité de sortie et configuré pour diriger la lumière d'image hors du corps de guide d'ondes, et un élément réfléchissant situé sur un côté monde du corps de guide d'ondes, l'élément réfléchissant étant configuré pour diriger la lumière d'image découplée du corps de guide d'ondes vers les yeux d'un utilisateur.
PCT/US2025/021905 2024-04-01 2025-03-27 Affichages à réalité augmentée polarisés Pending WO2025212393A1 (fr)

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US63/572,875 2024-04-01

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