公开(公告)号：US20230161217A1

公开(公告)日：2023-05-25

申请号：US17535502

申请日：2021-11-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Sihui HE ,  Zhexin ZHAO ,  Lu LU

IPC: G02F1/29 ,  G02B27/01

CPC classification number: G02F1/292 ,  G02B27/0172 ,  G02B2027/014 ,  G02B2027/0178

Abstract: A device includes a light guide and an in-coupling element coupled with the light guide and configured to couple an input image light into the light guide. The device also includes an out-coupling element coupled with the light guide and configured to couple the input image light out of the light guide as an output image light, and a controller configured to control at least one of the in-coupling element or the out-coupling element during a first time period and a second time period. The out-coupling element outputs a first output image light having a first field of view (“FOV”) during the first time period, and a second output image light having a second FOV during the second time period. The first FOV substantially overlaps with the second FOV, and an axis of symmetry of the first FOV is rotated relative to an axis of symmetry of the second FOV.

公开(公告)号：US20220365482A1

公开(公告)日：2022-11-17

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 ,  G03H1/18 ,  G02B27/01

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.

公开(公告)号：US20240345389A1

公开(公告)日：2024-10-17

申请号：US18608831

申请日：2024-03-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Jian XU ,  Xiang LI ,  Miaomiao XU ,  Xingzhou TU ,  Shaobai LI ,  Xiayu FENG ,  Wanli CHI ,  Wai Sze Tiffany LAM

IPC: G02B27/00

CPC classification number: G02B27/0093 ,  G02B6/0016 ,  G02B6/0036 ,  G02B6/0076

Abstract: A system is provided. The system includes a light source configured to emit a infrared (“IR”) light for illuminating an object. The system also includes a waveguide imaging assembly including a waveguide, an in-coupling element disposed at a first portion of the waveguide, an out-coupling element disposed at a second portion of the waveguide, and an optical sensor disposed facing the out-coupling element. The in-coupling element is configured to couple the IR light reflected by the object into the waveguide, the waveguide is configured to guide the IR light to propagate toward the out-coupling element through total internal reflection, and the out-coupling element is configured to couple the IR light out of the waveguide toward the optical sensor. The optical sensor is configured to generate a tracking signal of the object based on the IR light output from the waveguide.

公开(公告)号：US20230152750A1

公开(公告)日：2023-05-18

申请号：US17948233

申请日：2022-09-20

Applicant: Meta Platforms Technologies, LLC

Inventor： Junren WANG ,  Xiayu FENG ,  Mengfei WANG ,  Lu LU

IPC: G03H1/04 ,  G02B5/32 ,  G02B27/01 ,  G02B5/30

CPC classification number: G03H1/0402 ,  G02B5/32 ,  G02B27/0179 ,  G02B27/0172 ,  G02B5/3016 ,  G02B2027/0178 ,  G02B2027/0187 ,  G02B2027/0109 ,  G03H2001/0439 ,  G03H2001/0413 ,  G03H2260/12 ,  G03H2222/35 ,  G02B2027/0174 ,  G06F3/013

Abstract: A method includes providing a radiation with a predetermined intensity profile. The method also includes providing a photo-sensitive medium layer including a mixture of a photo-sensitive material and an absorbing additive. The absorbing additive has a predetermined non-uniform distribution in at least one of a direction within a film plane or a thickness direction of the photo-sensitive medium layer. The predetermined non-uniform distribution of the absorbing additive is configured to result in a predetermined non-uniform absorption of the radiation. The method also includes exposing the photo-sensitive medium layer to the radiation to form a polymer film. The optical film includes at least one predetermined birefringence variation in at least one of a direction within a film plane or a thickness direction of the polymer film.

公开(公告)号：US20230161093A1

公开(公告)日：2023-05-25

申请号：US17535450

申请日：2021-11-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Sihui HE ,  Zhexin ZHAO ,  Lu LU

IPC: F21V8/00 ,  G02B27/01 ,  G02B6/34

CPC classification number: G02B6/0016 ,  G02B27/0172 ,  G02B6/34 ,  G02B6/0038

Abstract: A device includes a light guide. The device also includes an in-coupling element coupled with the light guide and configured to couple a first image light into the light guide as a second image light propagating inside the light guide via total internal reflection (“TIR”), and to couple a portion of the second image light out of the light guide as a third image light. The device further includes a recycling element coupled with the light guide and configured to couple the third image light back into the light guide as a fourth image light propagating inside the light guide via TIR.

公开(公告)号：US20230027269A1

公开(公告)日：2023-01-26

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 ,  G02F1/1343 ,  G02F1/1333 ,  G02F1/1337

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：US20240353707A1

公开(公告)日：2024-10-24

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：US20240272473A1

公开(公告)日：2024-08-15

申请号：US18169872

申请日：2023-02-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Sawyer MILLER ,  Xiayu FENG ,  Mengfei WANG ,  Yuge HUANG ,  Michael ESCUTI

IPC: G02F1/1335 ,  G02B5/32 ,  G02F1/13363 ,  G02F1/1337

CPC classification number: G02F1/133543 ,  G02B5/32 ,  G02F1/133636 ,  G02F1/133637 ,  G02F1/133776

Abstract: A device is provided. The device includes an optical film including optically anisotropic molecules configured to form a plurality of helical structures with a plurality of helical axes and a helical pitch. The helical pitch is a distance along a helical axis over which an azimuthal angle of an optically anisotropic molecule vary by a predetermined value. Over the helical pitch of a helical structure, the azimuthal angle of the optically anisotropic molecule is configured to vary nonlinearly with respect to a distance from a starting point of the helical pitch to a local point at which the optically anisotropic molecule is located along the helical axis.

公开(公告)号：US20240085602A1

公开(公告)日：2024-03-14

申请号：US18513487

申请日：2023-11-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Sawyer MILLER ,  Mengfei WANG ,  Stephen CHOI ,  Lu LU ,  Barry David SILVERSTEIN

IPC: G02B5/18 ,  G02B5/32

CPC classification number: G02B5/1871 ,  G02B5/32

Abstract: A system is provided for generating a polarization interference pattern. The system includes a light source configured to output a first beam having a predetermined wavelength. The system includes a transmissive polarization volume hologram (“PVH”) mask configured to provide a predetermined diffraction efficiency to a second beam having the predetermined wavelength, a circular polarization, and a non-zero incident angle at the transmissive PVH mask. The system includes a light deflecting element disposed between the light source and the transmissive PVH mask, and configured to deflect the first beam as the second beam toward the transmissive PVH mask. The transmissive PVH mask is configured to forwardly diffract the second beam incident thereon as a third beam and a fourth beam having orthogonal circular polarizations, a substantially same light intensity, and symmetric propagation directions. The third beam and the fourth beam interfere with one another to generate the polarization interference pattern.

公开(公告)号：US20230213765A1

公开(公告)日：2023-07-06

申请号：US17981444

申请日：2022-11-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhexin ZHAO ,  Xiayu FENG

IPC: G02B27/01 ,  F21V8/00 ,  G02B5/10

CPC classification number: G02B27/0172 ,  G02B5/10 ,  G02B6/0031 ,  G02B6/0045 ,  G02B6/0055 ,  G02B2027/013

Abstract: A device is provided. The device includes a light guide having a curved surface. The device also includes an out-coupling element coupled with the light guide at an output portion of the light guide. The device further includes a reflective layer disposed at the output portion of the light guide. The out-coupling element is configured to couple a first ray propagating inside the light guide out of the light guide as a plurality of second rays propagating in non-parallel directions toward the reflective layer. The reflective layer is configured to reflect the plurality of second rays as a plurality of third rays propagating in parallel directions toward the out-coupling element and the light guide.