公开(公告)号：US11774753B1

公开(公告)日：2023-10-03

申请号：US17531301

申请日：2021-11-19

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Giuseppe Calafiore ,  Ningfeng Huang ,  Andrew Maimone ,  Andrew Ouderkirk ,  Hee Yoon Lee ,  Maxwell Parsons ,  Scott Charles McEldowney ,  Babak Amirsolaimani ,  Pasi Saarikko ,  Wanli Chi ,  Alexander Koshelev ,  Barry David Silverstein ,  Lu Lu ,  Wai Sze Tiffany Lam ,  Gang Li ,  Stephan Lutgen ,  Francois Gerard Franck Olivier ,  David Massoubre

IPC: G02B27/00 ,  G02B27/44 ,  G02B27/01 ,  G02B27/09 ,  G02B27/10

CPC classification number: G02B27/0081 ,  G02B27/0172 ,  G02B27/0944 ,  G02B27/1086 ,  G02B27/44 ,  G02B2027/0145 ,  G02B2027/0152

Abstract: 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.

公开(公告)号：US11615647B1

公开(公告)日：2023-03-28

申请号：US16696776

申请日：2019-11-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Gregory Olegovic Andreev ,  Gang Li ,  Changwon Jang

IPC: G06V40/19 ,  G02B5/18 ,  H04N5/33 ,  G03H1/02

Abstract: Systems and method for eye tracking are provided. In some embodiments, the eye tracking system includes a light source configured to generate light and project the light toward an object in a field of view, a detector configured to receive reflected portions of the light from the field of view in order to image the object, and a combiner including a volume grating configured to direct light reflected from different points in a field of view to the light detector. The volume grating includes a plurality of portions along a first area and each of the portions comprising a unique k-vector that is dependent on a respective portion of the field of view.

公开(公告)号：US11609424B2

公开(公告)日：2023-03-21

申请号：US16505462

申请日：2019-07-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Gregory Olegovic Andreev ,  Gang Li ,  Erik Shipton ,  Yingfei Jiang ,  Wanli Chi ,  Andrew John Ouderkirk

IPC: G02B27/00 ,  G02B5/32 ,  G02B27/01 ,  G02B5/18

Abstract: Techniques disclosed herein relate to a near-eye display system. One example of an eye-tracking system includes a substrate transparent to visible light and infrared light and a reflective holographic grating conformally coupled to a surface of the substrate. The reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking. The refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light.

公开(公告)号：US11598964B2

公开(公告)日：2023-03-07

申请号：US16854528

申请日：2020-04-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Gang Li ,  Changwon Jang

IPC: G02B27/01 ,  G02F1/137 ,  G02B15/16 ,  G02B27/00 ,  G02B5/30 ,  G02F1/29

Abstract: A freeform varifocal optical assembly includes at least three optical modules including a first plurality of optical elements including Pancharatnam-Berry phase (PBP) lenses, polarization sensitive hologram (PSH) lenses, metamaterials, or combinations thereof. The plurality of optical elements of each optical module include a property associated with a Zernike polynomial. Each of the first and the three optical modules are configurable between a plurality of optical powers. The freeform varifocal optical assembly is configurable to output a predetermined wavefront in response to an input wavefront.

公开(公告)号：US11852814B2

公开(公告)日：2023-12-26

申请号：US16810471

申请日：2020-03-05

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Yusufu Njoni Bamaxam Sulai ,  Gang Li ,  Ying Geng ,  Brian Wheelwright ,  Jacques Gollier ,  Babak Amirsolaimani ,  Weichuan Gao

IPC: G02B3/08 ,  G02B27/01 ,  G02B5/02 ,  H04N9/31 ,  G02B5/18 ,  G02B5/30 ,  G02B27/10 ,  G02B27/28 ,  G02F1/1334 ,  G02F1/137

CPC classification number: G02B27/0172 ,  G02B3/08 ,  G02B5/0289 ,  G02B5/1819 ,  G02B5/3025 ,  G02B27/0176 ,  G02B27/10 ,  G02B27/106 ,  G02B27/283 ,  G02F1/137 ,  G02F1/1334 ,  H04N9/3152 ,  G02B2027/0178 ,  G02B2027/0187 ,  G02F1/13345

Abstract: A display device includes an optical diffuser configured to, in response to receiving image light, output diffused image light having a same polarization as the image light. The optical diffuser is also configured to transmit ambient light. The display device also includes an optical assembly that includes a substrate, a reflector coupled to the substrate, and a beam splitter coupled to the substrate. The optical assembly is configured to transmit the diffused image light at a first optical power by reflecting the diffused image light at the reflector and at the beam splitter and to transmit the transmitted ambient light at a second optical power that is less than the first optical power without reflection at the reflector or the beam splitter. A method for transmitting light through the display device is also disclosed.

公开(公告)号：US20230204964A1

公开(公告)日：2023-06-29

申请号：US18179099

申请日：2023-03-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Gang Li ,  Changwon Jang

IPC: G02B27/01 ,  G02F1/137 ,  G02B15/16 ,  G02B27/00 ,  G02B5/30

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G02B15/16 ,  G02B27/0025 ,  G02B5/3083 ,  G02B2027/0178 ,  G02B5/3016 ,  G02F1/294

Abstract: A freeform varifocal optical assembly includes at least three optical modules including a first plurality of polarization sensitive optical elements including Pancharatnam-Berry phase (PBP) lenses, polarization sensitive hologram (PSH) lenses, metamaterials, or combinations thereof. The plurality of polarization sensitive optical elements of each optical module include a property associated with a Zernike polynomial. Each of the first and the three optical modules are configurable between a plurality of optical powers. The freeform varifocal optical assembly is configurable to output a predetermined wavefront in response to an input wavefront.

公开(公告)号：US11579425B1

公开(公告)日：2023-02-14

申请号：US16848652

申请日：2020-04-14

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Ying Geng ,  Brian Wheelwright ,  Jacques Gollier ,  Yusufu Njoni Bamaxam Sulai ,  Babak Amirsolaimani ,  Weichuan Gao ,  Gang Li ,  Mengfei Wang ,  Fenglin Peng

IPC: G02B17/08 ,  G02B3/08

Abstract: An optical assembly includes at least one substrate that provides a first curved surface and a second surface. The optical assembly also includes a beam splitter on the first curved surface, a reflector on the second surface, and an optical retarder disposed between the beam splitter and the reflector. The optical assembly is configured to transmit the first light through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light through peripheral portions of the optical assembly at a second optical power that is less than the first optical power. The first light includes light having a first polarization and wavelengths within a predetermined wavelength range. The second light includes light having wavelengths within the predetermined wavelength range and a second polarization orthogonal to the first polarization, as well as light having wavelengths outside the predetermined wavelength range.