Facebook Technologies, LLC

Meta Platforms Technologies, LLC

Microsoft Technology Licensing, LLC

Andrew Maimone

Douglas Robert Lanman

Hee Yoon Lee

Lu Lu

Brian M Wheelwright

Barry David Silverstein

Robert Dale Cavin

Joel Steven Kollin

Alexander Jobe Fix

Matthieu Charles Raoul Leibovici

Ganghun Kim

Oleg Yaroshchuk

Gang Li

Giuseppe Calafiore

Scott Charles McEldowney

Wai Sze Tiffany Lam

Afsoon Jamali

Maxwell Parsons

Andreas Georgiou

Alireza Moheghi

Andrew John Ouderkirk

Pasi Saarikko

Wanli Chi

Babak Amirsolaimani

Stephan Lutgen

Ningfeng Huang

Alexander Koshelev

Changwon Jang

Kavitha Ratnam

Junren Wang

David Massoubre

Yingfei Jiang

Joshua Owen Miller

Steven John Robbins

Jasmine Soria Sears

Adrian Travis

Mengfei Wang

Marina Zannoli

Nathan Seigo Matsuda

Yang Zhao

Francois Gerard Franck Olivier

Francois Olivier

Ying Geng

Jaron Zepel Lanier

Tuomas Vallius

Erik Shipton

Adrian Robert Leigh Travis

Richard Andrew Wall

Guohua Wei

Hao Yu

Xinye Lou

Eliezer Glik

Lei Xiao

Josh Hudman

Grace Elizabeth Kuo

Robin Joseph Swanson

Shane Colburn

Nicholas Diorio

Scott Lerner

Giseung Bang

A display device includes a display module for providing first image light. The display device also includes a first optical element for receiving and transmitting the first image light from the display module. The display module includes a region from which the first image light is provided in directions other than a direction perpendicular to the first optical element. The display device further includes a second optical element so that the second optical element receives the first image light transmitted through the first optical element and sends the received first image light back toward the first optical element as second image light. The first optical element receives the second image light from the second optical element and sends the second image light back toward the second optical element, and the second optical element receives and transmits the second image light from the first optical element.

High efficiency optical assembly with folded optical path

An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.

Optical assembly with holographic optics for folded optical path

A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.

Cascaded pupil-replicating waveguides

An optical assembly includes a beam steering device and a holographic optical element. The beam steering device is switchable between different states including a first state and a second state. The beam steering device includes a first polarization-selective optical element and a first tunable optical retarder optically coupled with the first polarization-selective optical element. The holographic optical element is positioned relative to the beam steering device for receiving light from the beam steering device and projecting a first light pattern while the beam steering device is in the first state and a second light pattern distinct from the first light pattern while the beam steering device is in the second state.

Optical combiner including polarization-selective elements and switchable half-wave plates for pupil steering

A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.

Device including diffractive optical element

An optical device includes a light source configured to provide a light beam. The optical device includes a light source configured to generate a light beam, and a spatial light modulator ('SLM') configured to modulate the light beam to provide a hologram for generating a display image. The optical device includes a polarization-selective steering assembly configured to provide a plurality of steering states for the modulated light beam. The optical device includes an image combiner configured to focus the modulated light beam steered by the polarization-selective steering assembly to generate an array of spots at an eye-box of the optical device.

Holographic near-eye display having pupil steering

A system is provided. The system includes a waveguide configured to guide an image light to propagate inside the waveguide. The system also includes a plurality of diffractive components coupled to the waveguide and switchable between operating in a diffraction state to direct the image light from the waveguide to an eye-box of the system, and operating in a non-diffraction state to transmit a light from a real-world environment to the eye-box. The system further includes a controller coupled with the plurality of diffractive components and configured to switch each of the plurality of diffractive components between operating in the diffraction state during a virtual-world subframe of a display frame and operating in the non-diffraction state during a real-world subframe of the display frame.

Method to reduce diffraction artifacts in a waveguide display and display using the same

An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.

Switchable diffractive optical element and waveguide containing the same

A wearable display with coherent replication of optical beams is presented. The display includes a replication element comprising a plurality of features configured to receive and split impinging light into a plurality of sub-beams for propagation in a plurality of directions. At least a portion of the split sub-beams propagating in a direction of an eyebox of the NED form an image by optical interference.

Wearable display with coherent replication

A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium and one or more diffractive optical elements configured to receive the second portion of the light and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.

Holographic in-field illuminator

Holographic pattern generation for head-mounted display (HMD) eye tracking using a diffractive optical element

A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium and a plurality of optical fibers configured to receive the second portion of the light and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.

Holographic pattern generation for head-mounted display (HMD) eye tracking using a fiber exposure

A liquid crystal (LC) mixture for a pitch variable optical element is provided. The LC mixture includes a host LC and one or more LC dimers dissolved as a guest in the host LC. The host LC and the one or more LC dimers have respective dielectric anisotropies of opposite signs in nematic phase. A net dielectric anisotropy of the LC mixture is substantially neutral.

Liquid crystal mixtures for pitch variable optical elements

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Duvall, WA, United States of America

Andrew Maimone