公开(公告)号：US12259616B1

公开(公告)日：2025-03-25

申请号：US18498001

申请日：2023-10-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Nicholas John Diorio, Jr. ,  Mengfei Wang ,  Yuge Huang ,  Kai-Han Chang ,  Lu Lu ,  Xiayu Feng

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343

Abstract: A device includes a plurality of electrode layers. The device also includes a birefringent medium layer disposed between the plurality of electrode layers. The device also includes at least one alignment structure disposed at a surface of the birefringent medium layer. The birefringent medium layer includes liquid crystal molecules arranged in a plurality of helical twist structures having a helical axis. The plurality of electrode layers are configured to generate an electric field within the birefringent medium layer, and the liquid crystal molecules are aligned via the electric field to be titled with respect to the helical axis.

公开(公告)号：US12066648B2

公开(公告)日：2024-08-20

申请号：US17322354

申请日：2021-05-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Lu Lu ,  Hsien-Hui Cheng ,  Junren Wang ,  Mengfei Wang

IPC: G02B5/30 ,  G02B5/32 ,  G03H1/02

CPC classification number: G02B5/3083 ,  G02B5/32 ,  G03H1/0248 ,  G03H2223/20

Abstract: A device is provided. The device includes a first polarization hologram element configured to operate as a half-wave plate for a first light having a first wavelength, and as a full-wave plate for a second light having a second wavelength. The device also includes a second polarization hologram element stacked with the first polarization hologram, and configured to operate as the half-wave plate for the second light and as the full-wave plate for the first light. The first polarization hologram element is configured to forwardly diffract or transmit the first light depending on a handedness of the first light. The second polarization hologram element is configured to forwardly diffract or transmit the second light depending on a handedness of the second light.

公开(公告)号：US11467331B1

公开(公告)日：2022-10-11

申请号：US16666823

申请日：2019-10-29

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 ,  G02B27/01 ,  F21V8/00

Abstract: An optical device includes a display configured to generate an image light; and a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the optical device. The waveguide includes an in-coupling element configured to couple the image light into the waveguide, and an out-coupling element configured to decouple the image light out of the waveguide. The out-coupling element includes a grating having a diffraction efficiency gradient along a predetermined direction at a plane of the grating.

公开(公告)号：US11815729B2

公开(公告)日：2023-11-14

申请号：US17229852

申请日：2021-04-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Stephen Choi ,  Mengfei Wang ,  Junren Wang ,  Lu Lu ,  Kyle Justin Curts

IPC: G03H1/26 ,  G02B7/00 ,  G02B5/32 ,  G02B5/18 ,  G03H1/02 ,  G02B27/28 ,  G02B27/42

CPC classification number: G02B7/003 ,  G02B5/1823 ,  G02B5/32 ,  G02B27/286 ,  G02B27/4233 ,  G03H1/0248 ,  G02B2005/1804

Abstract: A system includes a diffractive optical element configured to receive a first beam and a second beam interfering with one another to generate a first interference pattern. The diffractive optical element is also configured to forwardly diffract the first beam and the second beam to output a third beam and a fourth beam. The third beam and the fourth beam interfere with one another to generate a second interference pattern. The system also includes a detector configured to detect the second interference pattern.

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：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：US20240353532A1

公开(公告)日：2024-10-24

申请号：US18642484

申请日：2024-04-22

Applicant: Meta Platforms Technologies, LLC

Inventor： John Ho ,  Jiang Zhu ,  Boon Shiu ,  Paurakh Rajbhandary ,  Yuge Huang ,  Lu Lu ,  Junren Wang ,  Mengfei Wang ,  Xiayu Feng ,  Zhexin Zhao ,  Steven Alexander-Boyd Hickman ,  Tingling Rao ,  Kimberly Kay Childress ,  Amir Shariffar ,  Sadegh Aghaei ,  Zhaoyu Nie ,  Prathmesh Deshmukh ,  Zhaocheng Liu ,  Raymond Smith, II ,  Andrew John Ouderkirk ,  Sawyer Miller ,  Hsien-Hui Cheng ,  Xuan Wang ,  Ali Altaqui ,  Zhuoliang Ni

IPC: G01S7/41 ,  A61B5/024 ,  G02B27/01 ,  G03H1/02

CPC classification number: G01S7/412 ,  A61B5/024 ,  G01S7/415 ,  G02B27/0172 ,  G03H1/0248 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/026 ,  G03H2250/38

Abstract: A computer-implemented method may include (1) causing a radar component to emit one or more radar signals and (2) causing the radar component to analyze one or more return signals. Also disclosed is a method for forming a 3D liquid crystal polarization hologram optical element and a method for characterizing diffractive waveguides includes directing light onto a structure and measuring the diffracted light to capture at least one image of the structure. Lastly, disclosed is a method of pattering organic solid crystals and a method directing a beam of input light to a surface of an optical material to determine crystallographic and optical parameters of the optical material. Various other methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US12092850B2

公开(公告)日：2024-09-17

申请号：US17073249

申请日：2020-10-16

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Lu Lu ,  Xiayu Feng ,  Mengfei Wang ,  Hao Yu ,  Ryan Li ,  Yun-Han Lee ,  Junren Wang ,  Barry David Silverstein

IPC: G02B5/32 ,  G02B5/20 ,  G02B5/30 ,  G03H1/02 ,  G03H1/04

CPC classification number: G02B5/32 ,  G02B5/203 ,  G02B5/3016 ,  G03H1/0248 ,  G03H1/0402 ,  G03H2001/0413 ,  G03H2001/0439 ,  G03H2260/12

Abstract: A first layer of anisotropic material extends along a first plane and includes anisotropic components being parallel to a second plane non-parallel and non-perpendicular to the first plane. The anisotropic components are arranged in cycloidal or helical patterns. The cycloidal or helical patterns define one or more Bragg planes that are non-parallel and non-perpendicular to the first plane and either substantially parallel or substantially perpendicular to the second plane.

公开(公告)号：US11874474B1

公开(公告)日：2024-01-16

申请号：US17018579

申请日：2020-09-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Mengfei Wang ,  Junren Wang ,  Lu Lu ,  Robin Sharma ,  Gregory Olegovic Andreev ,  Garam Young ,  Andrew John Ouderkirk ,  Babak Amirsolaimani ,  Fenglin Peng ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/42 ,  G02B27/28 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75

CPC classification number: G02B27/0179 ,  G02B27/0172 ,  G02B27/283 ,  G02B27/286 ,  G02B27/4205 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75 ,  G02B2027/011 ,  G02B2027/0138 ,  G02B2027/0187 ,  G02F2203/01 ,  G02F2203/07 ,  G02F2203/24

Abstract: A system includes a diffractive optical element including at least one substrate and a grating structure. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range, and the at least one substrate is configured to reflect a second light. The system also includes a polarization selective mechanism configured to generate images based on the first light and the second light, respectively.

公开(公告)号：US11668932B2

公开(公告)日：2023-06-06

申请号：US16735425

申请日：2020-01-06

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Lu Lu ,  Gang Li ,  Seungjae Lee ,  Mengfei Wang

IPC: G02B27/00 ,  G02B5/18 ,  G02B26/08 ,  G02B27/42 ,  G02F1/01

CPC classification number: G02B27/0081 ,  G02B5/1871 ,  G02B26/0833 ,  G02B27/0093 ,  G02B27/4233 ,  G02F1/0136

Abstract: Various embodiments set forth a foveated display system and components thereof. The foveated display system includes a peripheral display module disposed in series with a foveal display module. The peripheral display module is configured to generate low-resolution, large field of view imagery for a user's peripheral vision. The foveal display module is configured to perform foveated rendering in which high-resolution imagery is focused towards a foveal region of the user's eye gaze. The peripheral display module may include a diffuser that is disposed within a pancake lens, which is a relatively compact design. The foveal display module may include a Pancharatnam-Berry Phase grating stack that increases the steering range of a beam-steering device such that a virtual image can be steered to cover an entire field of view visible to the user's eye.