公开(公告)号：US11733445B2

公开(公告)日：2023-08-22

申请号：US17083370

申请日：2020-10-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Junren Wang ,  Mengfei Wang ,  Babak Amirsolaimani ,  Lu Lu ,  Scott Charles McEldowney

IPC: G02B5/30 ,  G02B27/01 ,  F21V8/00

CPC classification number: G02B5/3083 ,  G02B5/3016 ,  G02B6/005 ,  G02B27/0172

Abstract: An optical element includes a first birefringent medium layer with orientations of directors of first optically anisotropic molecules spatially varying with a first in-plane pitch and a first vertical pitch. The optical element also includes a second birefringent medium layer with orientations of directors of second optically anisotropic molecules spatially varying with a second in-plane pitch and a second vertical pitch. The second birefringent medium layer is optically coupled with the first birefringent medium layer and configured to reduce a diffraction of a light by the first birefringent medium layer. The first in-plane pitch is substantially the same as the second in-plane pitch, and the second vertical pitch is smaller than the first vertical pitch.

公开(公告)号：US20230176376A1

公开(公告)日：2023-06-08

申请号：US17581303

申请日：2022-01-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Babak Amirsolaimani ,  Renate Eva Klementine Landig ,  Andrew Maimone ,  Giuseppe Calafiore

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0016 ,  G02B6/0038 ,  G02B2027/0174 ,  G02B2027/0112

Abstract: A lightguide for conveying image light to an eyebox of a display device includes a tunable grating, e.g. an out-coupling grating for out-coupling the image light from the lightguide. The tunable grating may be tuned or switched to effectively diffract light of a color channel of a color-sequential display. In augmented reality display systems, a lightguide combiner element may include a switchable grating to out-couple the image light only during short time intervals and to not out-couple the image light in between these time intervals. Effectively, the out-coupling grating is present only a portion of overall operation time of the display, which improves the transparency of the combiner element to the outside light and reduces rainbow effects.

公开(公告)号：US11586024B1

公开(公告)日：2023-02-21

申请号：US16532311

申请日：2019-08-05

Applicant: META PLATFORMS TECHNOLOGIES, LLC

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

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 receive first light at the first curved surface and reflect the first light at the reflector and subsequently, at the beam splitter before outputting the first light from the reflector. The first light is transmitted through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light at a second optical power that is less than the first optical power. The second light is transmitted through peripheral portions of the beam splitter and reflector without reflection at the reflector.

公开(公告)号：US12204136B2

公开(公告)日：2025-01-21

申请号：US17901851

申请日：2022-09-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Lu Lu ,  Mengfei Wang ,  Fenglin Peng ,  Junren Wang ,  Oleg Yaroshchuk ,  Yingfei Jiang ,  Babak Amirsolaimani ,  Scott Charles McEldowney

IPC: G03H1/02 ,  F21V8/00 ,  G02B27/01

Abstract: A device includes a display configured to generate an image light. The device also includes a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the device. The waveguide includes a grating including a birefringent material, and a birefringence of the grating is configured to increase along a pupil-expanding direction of the device.

公开(公告)号：US11860571B2

公开(公告)日：2024-01-02

申请号：US17528180

申请日：2021-11-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Andrew John Ouderkirk ,  Robin Sharma ,  Hannah Noble ,  Babak Amirsolaimani ,  Yusufu Njoni Bamaxam Sulai

IPC: G03H1/02 ,  G02B5/32 ,  G02B27/28

CPC classification number: G03H1/0248 ,  G02B5/32 ,  G02B27/283 ,  G03H1/0256 ,  G03H2223/23

Abstract: A system is provided. The system includes a first PVH layer configured to deflect a first polarized light having a first handedness. The system includes a second PVH layer coupled to the first PVH layer and configured to deflect a second polarized light having a second handedness opposite to the first handedness. The system includes an optical sensor configured to generate a first image based on the first polarized light deflected by the first PVH layer and generate a second image based on the second polarized light deflected by the second PVH layer.

公开(公告)号：US20230367123A1

公开(公告)日：2023-11-16

申请号：US18110856

申请日：2023-02-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Babak Amirsolaimani

IPC: G02B27/01 ,  G02B27/44 ,  G02B27/28 ,  G02B27/09

CPC classification number: G02B27/0172 ,  G02B27/0977 ,  G02B27/286 ,  G02B27/44 ,  G02B2027/0123

Abstract: A near-eye display has an image projector coupled to a lightguide for receiving and propagating image light provided by the image projector, the image light carrying an image to be displayed to a viewer. Field of view of the near-eye display may be expanded by providing a beam redirector downstream of the lightguide for controllably redirecting the image light in coordination with displaying different field of view portions by the image projector. To compensate the redirection of external light by the beam redirector, a second beam redirector may be provided upstream of the first redirector and the lightguide.

公开(公告)号：US11726326B1

公开(公告)日：2023-08-15

申请号：US16899455

申请日：2020-06-11

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Adrian Travis ,  Babak Amirsolaimani

IPC: G02B27/01 ,  F21V8/00 ,  G02B27/00 ,  G03H1/02

CPC classification number: G02B27/0172 ,  G02B6/0056 ,  G02B27/0012 ,  G03H1/0248 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: An optical device includes an optical assembly having a first end and a second end, the optical assembly including a first optical component and a second optical component, the first optical component having at least a first optical surface, a second optical surface, and a third optical surface that are non-parallel to one another. The first optical surface is curved and extends between the first end and the second end. A first polarization selective redirector is located between the first optical component and the second optical component, and a first polarization rotating redirector is disposed at the second end.

公开(公告)号：US11698538B2

公开(公告)日：2023-07-11

申请号：US17555097

申请日：2021-12-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Brian Wheelwright ,  Weichuan Gao ,  Babak Amirsolaimani ,  Ying Geng

IPC: G02B26/08 ,  G02B27/18 ,  G02B5/10 ,  G02B5/30 ,  G02B9/06 ,  G02B26/10 ,  G02B27/00 ,  G02B27/28

CPC classification number: G02B27/18 ,  G02B5/10 ,  G02B5/3083 ,  G02B9/06 ,  G02B26/0833 ,  G02B26/105 ,  G02B27/0081 ,  G02B27/283

Abstract: A multipass scanner usable e.g. in a near-eye display is disclosed. The multipass scanner scans a light beam angularly, forming an image in angular domain. The multipass scanner includes a light source, a tiltable reflector, and a multipass coupler that couples light emitted by the light source to the tiltable reflector, receives the reflected light and couples it back to the tiltable reflector to double the scanning angle. Then, the multipass coupler couples the light reflected at least twice from the tiltable reflector to an exit pupil of the scanner. A pupil-replicating waveguide disposed at the exit pupil of the scanner extends the image in angular domain. Multiple reflections of the light beam from the tiltable reflector enable one to increase the angular scanning range and associated field of view of the display without having to increase the angular scanning range of the tiltable reflector.

公开(公告)号：US11624922B2

公开(公告)日：2023-04-11

申请号：US17326074

申请日：2021-05-20

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Brian Wheelwright ,  Yun-Han Lee ,  Babak Amirsolaimani ,  Weichuan Gao

IPC: G02B27/01

Abstract: An optical assembly for projecting light output by a display includes an optical waveguide, a reflective optical element, and a in-coupler coupled with the optical waveguide. The reflective optical element is positioned to receive first light and to reflect the first light as second light. The in-coupler is positioned to receive the first light and transmit the first light toward the reflective optical element. The in-coupler is further positioned to receive the second light and redirect a first portion of the second light so that the first portion of the second light undergoes total internal reflection inside the optical waveguide. The reflective optical element includes a negative meniscus lens having a concave lens surface and a convex lens surface coupled with a reflective surface. The reflective optical element is positioned to focus the first light such that the second light is more collimated than the first light.

公开(公告)号：US11567332B2

公开(公告)日：2023-01-31

申请号：US17706581

申请日：2022-03-28

Applicant: Meta Platforms Technologies, LLC

Inventor： Scott Charles Mceldowney ,  Babak Amirsolaimani ,  Yun-Han Lee ,  Lu Lu ,  Mengfei Wang ,  Junren Wang

IPC: G02B27/01 ,  F21V8/00

Abstract: A device includes a light guide. The device also includes a first in-coupling element configured to couple a first input light into the light guide, and a first out-coupling element configured to couple the first input light out of the light guide as a first output light having a first output field of view (“FOV”). The device also includes a second in-coupling element configured to couple a second input light into the light guide. The device further includes a second out-coupling element configured to couple the second input light out of the light guide as a second output light having a second output FOV substantially non-overlapping with the first output FOV. A combination of the first and second output FOVs is larger than at least one of the first or second output FOV, and the first and second input lights have orthogonal polarizations.