公开(公告)号：US20250164695A1

公开(公告)日：2025-05-22

申请号：US18785679

申请日：2024-07-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Prathmesh Deshmukh ,  Tingling Rao ,  Zhaoyu Nie ,  Andrew John Ouderkirk ,  Jie Li ,  Yuanrui Li ,  Jianji Yang ,  Zhenye Li ,  Sawyer Miller ,  Xuan Wang ,  Joshua Cobb ,  Hsien-Hui Cheng ,  Eugene Cho ,  Robin Sharma ,  Eric Stratton ,  Ajit Ninan ,  Zhexin Zhao ,  Xiayu Feng ,  Yun-Han Lee ,  Michael Escuti ,  Steven John Robbins ,  Babak Amirsolaimani ,  Lu Lu ,  Barry David Silverstein

IPC: G02B6/27 ,  G02B6/34 ,  G02B27/01 ,  G06F1/16

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 element located at the input end for coupling light into the waveguide body, and an output coupling element located at the output end for coupling light out of the waveguide body, where the waveguide body includes an organic solid crystal. The organic solid crystal may be a single crystal having principal axes rotated with respect to the dimensions of the waveguide body. Such an optical element may have low weight and exhibit good color uniformity while providing polarization scrambling of the guided light.

公开(公告)号：US12253428B2

公开(公告)日：2025-03-18

申请号：US18086638

申请日：2022-12-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Yiyang Wu ,  Hsien-Hui Cheng ,  Xuan Wang ,  Lu Lu

IPC: G01M11/02

Abstract: A system for measuring a satellite ghost efficiency of a diffractive lens is provided. The system includes a light source configured to output a first probing beam, and a beam tweaking assembly disposed between the light source and the diffractive lens, and configured to convert the first probing beam into a second probing beam that is a non-collimated beam. The diffractive lens diffracts the second probing beam into a plurality of diffracted beams including a first diffracted beam of a parent diffraction order and a second diffracted beam of a satellite ghost diffraction order. The beam tweaking assembly includes one or more optical lenses, and an adjustable optical power. The system also includes a detector configured to generate a beam spot pattern including a first beam spot corresponding to the first diffracted beam and a second beam spot corresponding to the second diffracted beam.

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：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：US20240184124A1

公开(公告)日：2024-06-06

申请号：US18237332

申请日：2023-08-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Ali Altaqui ,  Xuan Wang ,  Lu Lu ,  Michael Escuti ,  Chulwoo Oh ,  Hsien-Hui Cheng ,  Jihwan Kim ,  Yuge Huang ,  Yun-Han Lee ,  Brian Wheelwright

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/09 ,  G02F1/01

CPC classification number: G02B27/0179 ,  G02B5/3083 ,  G02B27/0172 ,  G02B27/0922 ,  G02B27/0955 ,  G02F1/0136 ,  G02B2027/0185

Abstract: A multi-focal system includes a display pixel array, a pixelated polarization array, and a Pancharatnam-Berry phase (PBP) lens. The display pixel array includes a first display pixels generating first display light and a second display pixels generating second display light. The pixelated polarization array has first pixels and second pixels. The first pixels are aligned with the first display pixels to generate a first polarized light having a first polarization orientation. The second pixels are aligned with the second display pixels to generate a second polarized light having a second polarization orientation different from the first polarization orientation. The PBP lens is configured to focus the first polarized light having the first polarization orientation to a first focal length and focus the second polarized light having the second polarization orientation to a second focal length that is greater than the first focal length.

公开(公告)号：US12038631B2

公开(公告)日：2024-07-16

申请号：US18063899

申请日：2022-12-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Chulwoo Oh ,  Hsien-Hui Cheng ,  Xiaoze Ou ,  Linghui Rao

IPC: G02F1/03 ,  G02F1/13363 ,  G02F1/1337 ,  G02B27/01 ,  G02F1/1335 ,  G02F1/1343

CPC classification number: G02F1/0311 ,  G02F1/133636 ,  G02F1/133638 ,  G02F1/133749 ,  G02B27/0172 ,  G02F1/133531 ,  G02F1/134363

Abstract: A switchable waveplate includes a substrate, a first electrode layer on the substrate, an alignment layer on the first electrode layer and including alignment patterns formed thereon, a liquid crystal layer on the alignment layer, and a second electrode layer on the liquid crystal layer. The alignment patterns are determined based on angles of interest at a plurality of regions of the switchable waveplate. The liquid crystal layer includes liquid crystal molecules that are arranged according to the alignment patterns and are pre-tilted when no electric field is applied to the liquid crystal layer. The first electrode layer and the second electrode layer are configured to apply electric fields of different magnitudes to a plurality of zones of the switchable waveplate.

公开(公告)号：US11953796B2

公开(公告)日：2024-04-09

申请号：US17745854

申请日：2022-05-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Lu Lu ,  Xiayu Feng ,  Hsien-Hui Cheng

IPC: G02F1/137 ,  G02B27/01 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/1343

CPC classification number: G02F1/137 ,  G02B27/0172 ,  G02F1/133345 ,  G02F1/133738 ,  G02F1/134309 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02F2203/07

Abstract: A device is provided. The device includes a first Pancharatnam-Berry phase (“PBP”) lens, and a second PBP lens stacked with the first PBP lens. Each of the first PBP lens and the second PBP lens includes a liquid crystal (“LC”) layer. Each side of the LC layer is provided with a continuous electrode and a plurality of patterned electrodes. The patterned electrodes in the first PBP lens are arranged non-parallel to the patterned electrodes in the second PBP lens.

公开(公告)号：US20220382080A1

公开(公告)日：2022-12-01

申请号：US17330422

申请日：2021-05-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui Cheng ,  Yang Zhao ,  Hannah Noble ,  Fenglin Peng ,  Lu Lu

IPC: G02F1/01 ,  G02F1/1347 ,  G02F1/139 ,  G02B27/01

Abstract: A polarization modulator includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell has a first type of liquid crystals configured to rotate an optical axis of light parallel to a first plane of the first liquid crystal cell. The second liquid crystal cell is configured to receive the light from the first liquid crystal cell. The second liquid crystal cell has a second type of liquid crystals configured to rotate the optical axis of the light perpendicular to a second plane of the second liquid crystal cell.

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：US11693265B2

公开(公告)日：2023-07-04

申请号：US17330422

申请日：2021-05-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui Cheng ,  Yang Zhao ,  Hannah Noble ,  Fenglin Peng ,  Lu Lu

IPC: G02F1/1347 ,  G02F1/01 ,  G02B27/01 ,  G02F1/139

CPC classification number: G02F1/0136 ,  G02B27/0172 ,  G02F1/139 ,  G02F1/1347 ,  G02B2027/0178

Abstract: A polarization modulator includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell has a first type of liquid crystals configured to rotate an optical axis of light parallel to a first plane of the first liquid crystal cell. The second liquid crystal cell is configured to receive the light from the first liquid crystal cell. The second liquid crystal cell has a second type of liquid crystals configured to rotate the optical axis of the light perpendicular to a second plane of the second liquid crystal cell.