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公开(公告)号：US11262495B1
公开(公告)日：2022-03-01
申请号：US16152411
申请日：2018-10-04
Applicant: Facebook Technologies, LLC
Inventor： Matthew E. Colburn , Giuseppe Calafiore , Matthieu Charles Raoul Leibovici , Maxwell Parsons
Abstract: A manufacturing system for creating waveguides that include optical gratings having high coupling efficiencies is described herein. The waveguides are used to guide image light from a source assembly to an eye of a user. The optical gratings are used to couple light into an optical waveguide element and/or decouple light from the optical waveguide element. The manufacturing system creates optical gratings by patterning and adjusts refractive indexes of the optical gratings by infusion and post-processing. A refractive index of an optical grating can be uniform or non-uniform. In-coupling efficiencies of light into a waveguide via the optical gratings and/or out-coupling efficiencies of light out of a waveguide via the optical gratings can be increased. The manufacturing system includes a patterning system, an infusion system, and a post-processing system.
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公开(公告)号：US11137655B2
公开(公告)日：2021-10-05
申请号：US16839634
申请日：2020-04-03
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons , Shane Colburn , Yingfei Jiang , Andrew Maimone , Erik Shipton , Guohua Wei , Oleg Yaroshchuk
IPC: G02F1/1335 , G02F1/137 , G02F1/1343 , G02F1/1337 , G03H1/22
Abstract: A tunable liquid crystal (LC) device includes an LC layer between a pair of reflectors forming an optical cavity. The reflectors include conductive layers for applying an electrical signal to the LC layer. One of the conductive layers may include an array of conductive pixels for spatially selective control of the effective refractive index of the LC layer. The phase delay introduced by the LC layer may be greatly increased or magnified by placing the LC layer into the optical cavity. This enables a substantial reduction of the LC layer thickness, which in its turn enables very tight pitches of the LC pixels, with a reduced inter-pixel crosstalk caused by fringing electric fields, as well as faster switching times. A tight-pitch, fast LC device may be used as a configurable hologram or a spatial light modulator.
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公开(公告)号：US10998297B1
公开(公告)日：2021-05-04
申请号：US16397343
申请日：2019-04-29
Applicant: Facebook Technologies, LLC
Inventor： John Michael Goward , Stephen John Holmes , Maxwell Parsons
IPC: H01L29/18 , H01L33/00 , H01L25/075 , H01L33/62 , H01L33/58
Abstract: A light-emitting assembly that includes multiple light-emitting devices electrically coupled to a substrate via nano-porous metal blocks. The light-emitting assembly may be used as a source array of a near-eye display device. The light-emitting devices may be superluminescent diodes and the nano-porous metal blocks may include nano-porous gold. The nano-porous metal blocks allow thermal and electrical conduction between the light-emitting devices and the substrate. Nano-porous gold allows bonding at a lower temperature than solder and is compressible. Different pressure can be applied to different nano-porous metal blocks to align the optical heights of different light-emitting devices relative to the substrate. After forming nano-porous metal blocks on a substrate, the light-emitting devices are pressed onto the metal blocks to secure and align the light-emitting devices. The alignment process may be carried in an active optical alignment process when the light-emitting devices are powered and emit light.
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公开(公告)号：US20230185091A1
公开(公告)日：2023-06-15
申请号：US17549394
申请日：2021-12-13
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Maxwell Parsons , Fenglin Peng , Miaomiao Xu , Yang Yang , Yu Shi , Dianmin Lin
CPC classification number: G02B27/0172 , G02B6/4206 , G02B6/4213 , G02B2027/0174 , G02B2027/0178
Abstract: A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.
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公开(公告)号：US20230176444A1
公开(公告)日：2023-06-08
申请号：US17697600
申请日：2022-03-17
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
CPC classification number: G02F1/292 , G02B27/0172 , G02F1/335 , G03H1/0248 , G06F1/163 , G06F3/013 , G06T7/246 , H04N5/2256 , G02B2027/0138 , G02B2027/0174 , G02B2027/0187 , G06T2207/30201
Abstract: A switchable grating may be used to redirect illuminating light for illuminating a user’s eye in an eye tracking system, to facilitate the determination of eye position and/or orientation. The eye tracking system may be used in a near-eye display. An eye tracking camera obtains an eye image, and a controller performs an initial determination of the eye position. The controller may switch the switchable grating to direct the illuminating light beam onto the eye, for a better position and/or eye orientation determination.
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Patent Agency Ranking
公开(公告)号：US10466496B2
公开(公告)日：2019-11-05
申请号：US15833676
申请日：2017-12-06
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons
IPC: G02B27/12 , G02B1/10 , G02B27/01 , G02B27/10 , G02B27/28 , G02B27/30 , G02B3/10 , G02B5/26 , G02B5/30 , G02B5/32 , G02B27/14
Abstract: Disclosed is a multi-color light source device including a first light source configured to emit light of a first color, a second light source configured to emit light of a second color that is distinct from the first color, and a first geometric phase lens associated with a first focal length for the light of the first color and a second focal length, distinct from the first focal length, for the light of the second color. The first light source is located at a first distance from the first geometric phase lens, and the second light source is located at a second distance, distinct from the first distance, from the geometric phase lens. Also disclosed is a head mounted display system including the multi-color light source device, a light modulator configured for modulating light from the multi-color light source device, and one or more lenses.
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公开(公告)号：US11035988B1
公开(公告)日：2021-06-15
申请号：US16108262
申请日：2018-08-22
Applicant: Facebook Technologies, LLC
Inventor： Matthew E. Colburn , Giuseppe Calafiore , Matthieu Charles Raoul Leibovici , Maxwell Parsons , Austin Lane
Abstract: A manufacturing system performs a lithographic patterning of a resist formed on a substrate to create a first optical grating including a plurality of structures at a first slant angle relative to the substrate. The manufacturing system performs a tunable shrinkage of the plurality of structures to adjust the first slant angle to a target slant angle different from the first slant angle. In some embodiments, the manufacturing system performs a post-processing of the plurality of structures to create a second optical grating from the first optical grating. The post-processing may adjust at least one of: a refractive index, a height, and a volume of the first optical grating.
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公开(公告)号：US20200292851A1
公开(公告)日：2020-09-17
申请号：US16890607
申请日：2020-06-02
Applicant: Facebook Technologies, LLC
Inventor： Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Ningfeng Huang , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Giuseppe Calafiore , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Olivier , David Massoubre
Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
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公开(公告)号：US10705353B1
公开(公告)日：2020-07-07
申请号：US16224637
申请日：2018-12-18
Applicant: Facebook Technologies, LLC
Inventor： Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Ningfeng Huang , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Giuseppe Calafiore , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Olivier , David Massoubre
Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
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公开(公告)号：US10705341B1
公开(公告)日：2020-07-07
申请号：US15650612
申请日：2017-07-14
Applicant: Facebook Technologies, LLC
Inventor： Maxwell Parsons , Wanli Chi , Yijing Fu , Hee Yoon Lee , James Ronald Bonar , Pasi Saarikko , Scott Charles McEldowney
Abstract: A waveguide display includes a source assembly, an output waveguide, and a controller. The source assembly includes a light source and an optics system. The light source includes source elements arranged in a 1D or 2D array that emit image light that is temporally incoherent and spatially coherent. In some embodiments, the light source includes an array of superluminous LEDs, an array of laser diodes, an array of resonant cavity LEDs, or some combination thereof. The optics system includes a scanning assembly that scans the image light to particular locations based on scanning instructions. The output waveguide receives the scanned image light from the scanning assembly and outputs an expanded image light. The controller generates the scanning instructions and provides the scanning instructions to the light source.
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