公开(公告)号：US20230367124A1

公开(公告)日：2023-11-16

申请号：US18124424

申请日：2023-03-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Sihui He ,  Xiayu Feng ,  Renate Eva Klementine Landig ,  Jacques Gollier

IPC: G02B27/01

CPC classification number: G02B27/0172

Abstract: A lightguide assembly includes a stack of optically separated lightguide plates for conveying image light to an eyebox. At least one lightguide plate of the stack includes an in-coupler configured for switchably in-coupling the image light into the lightguide plate. The switchable in-coupler(s) may be used to time-sequence through different lightguides of the stack, each lightguide carrying a portion of the image such as a field of view portion or a color channel of the image. The time-sequencing through the lightguides allows one to compensate for image offsets due to the lightguide being non-parallel to one another, by providing corresponding offsets in the image portions being carried by different lightguides.

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：US20230393322A1

公开(公告)日：2023-12-07

申请号：US17834760

申请日：2022-06-07

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu Feng ,  Zhexin Zhao ,  Xuan Wang ,  Hekun Huang ,  Gang Li ,  Lu Lu

IPC: F21V8/00 ,  G02B27/42 ,  G02B5/32 ,  G02B27/01

CPC classification number: G02B6/0023 ,  G02B27/4222 ,  G02B6/005 ,  G02B5/32 ,  G02B27/0172

Abstract: A display apparatus includes a lightguide for conveying images to an eyebox. The lightguide includes a substrate, a diffractive optical element (DOE) configured to couple the image light into the substrate. The DOE has a spatially variable pitch configured to provide the DOE with a positive optical power. The lightguide further includes a grating out-coupler supported by the substrate for out-coupling portions of the image light from the substrate toward the eyebox.

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：US11846774B2

公开(公告)日：2023-12-19

申请号：US17697592

申请日：2022-03-17

Applicant: Meta Platforms 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

IPC: G02B27/00 ,  G02B27/01 ,  G06F3/01 ,  G02F1/29 ,  F21V8/00 ,  G02B6/35 ,  G02F1/1335 ,  G09G3/00 ,  G09G3/34 ,  G06T7/246 ,  H04N23/56 ,  G02F1/335 ,  G03H1/02 ,  G06F1/16 ,  H04N23/698 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B27/42 ,  G02F1/33 ,  G06T3/40 ,  G02B27/44 ,  G02B26/08 ,  H04N23/10

CPC classification number: G02B27/0093 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B6/005 ,  G02B6/0016 ,  G02B6/0031 ,  G02B6/0035 ,  G02B6/0066 ,  G02B6/3518 ,  G02B26/0816 ,  G02B27/0081 ,  G02B27/0172 ,  G02B27/0179 ,  G02B27/4205 ,  G02B27/44 ,  G02F1/133504 ,  G02F1/133526 ,  G02F1/292 ,  G02F1/294 ,  G02F1/33 ,  G02F1/335 ,  G03H1/0248 ,  G06F1/163 ,  G06F3/013 ,  G06T3/4038 ,  G06T7/246 ,  G09G3/002 ,  G09G3/3413 ,  H04N23/56 ,  H04N23/698 ,  G02B2027/0105 ,  G02B2027/0138 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187 ,  G06T2207/30201 ,  G09G2310/0235 ,  H04N23/10

Abstract: A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.

公开(公告)号：US20230367125A1

公开(公告)日：2023-11-16

申请号：US18124445

申请日：2023-03-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu Feng ,  Sihui He

IPC: G02B27/01 ,  G02B27/28 ,  G02F1/01

CPC classification number: G02B27/0172 ,  G02B27/281 ,  G02F1/0136 ,  G02B6/005

Abstract: A near-eye display includes a first polarizer in a path of external light to an eyebox of the display for polarizing the external light to a first polarization state. A see-through lightguide is disposed in the path between the first polarizer and the eyebox for conveying image light to the eyebox in a second, orthogonal polarization state while transmitting the external light in the first polarization state. A second polarizer is disposed in the path downstream of the see-through lightguide for adjusting a power balance of the external light and the image light at the eyebox.

公开(公告)号：US12117687B1

公开(公告)日：2024-10-15

申请号：US18302556

申请日：2023-04-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui Cheng ,  Michael Escuti ,  Xiayu Feng ,  Mengfei Wang ,  Steven John Robbins ,  Zhexin Zhao ,  Lu Lu

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/137 ,  G03H1/02

CPC classification number: G02F1/133524 ,  G02F1/133507 ,  G02F1/13355 ,  G02F1/133636 ,  G02F1/133757 ,  G02F1/13706 ,  G03H1/0248

Abstract: A device is provided. The device includes a light guide configured to guide a first light propagating therein. The device also includes an optical film coupled with the light guide, optically anisotropic molecules in the optical film being configured with an in-plane orientation pattern having an in-plane pitch along the predetermined in-plane direction. Within the in-plane pitch of the in-plane orientation pattern, azimuthal angles of the optically anisotropic molecules are configured to vary nonlinearly along the predetermined in-plane direction. The optical film is configured to diffract the first light as a plurality of second lights at a plurality of locations of the optical film, with a plurality of predetermined, different diffraction efficiencies.

公开(公告)号：US20240027674A1

公开(公告)日：2024-01-25

申请号：US18063504

申请日：2022-12-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Tingling Rao ,  Wanli Chi ,  Xiayu Feng ,  Yun-Han Lee ,  Andrew John Ouderkirk ,  Poer Sung

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

CPC classification number: G02B6/0038 ,  G02B6/0016 ,  G02B6/0065 ,  G02B27/0172 ,  G03H1/0248 ,  G02B2027/0178

Abstract: An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling structure located at the input end for coupling light into the waveguide body, and an output coupling structure located at the output end for coupling light out of the waveguide body, where the waveguide body includes a layer of an organic solid crystal. Such an optical element may have low weight and exhibit good color uniformity.

公开(公告)号：US11815853B2

公开(公告)日：2023-11-14

申请号：US17322453

申请日：2021-05-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Hao Yu ,  Dianmin Lin ,  Lu Lu ,  Xiayu Feng ,  Mengfei Wang ,  Barry David Silverstein

IPC: G03H1/02 ,  G02B27/00 ,  G02B27/01 ,  G03H1/18

CPC classification number: G03H1/0248 ,  G02B27/0025 ,  G02B27/0172 ,  G03H1/18 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/185

Abstract: An optical device includes an optical component (e.g., a polarization volume hologram, a geometric phase device, or a polarization-insensitive diffractive optical element) having a uniform thickness and configured to modify a wavefront of a light beam that includes light in two or more wavelengths visible to human eyes, where the optical component has a chromatic aberration between the two or more wavelengths. The optical device also includes a metasurface on the optical component. The metasurface includes a plurality of nanostructures configured to modify respective phases of incident light at a plurality of regions of the metasurface, where the plurality of nanostructures is configured to, at each region of the plurality of regions, add a respective phase delay for each of the two or more wavelengths to correct the chromatic aberration between the two or more wavelengths.