公开(公告)号：US11592681B2

公开(公告)日：2023-02-28

申请号：US17029963

申请日：2020-09-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Oleg Yaroshchuk ,  Giuseppe Calafiore ,  Alireza Moheghi ,  Andrew Maimone ,  Barry David Silverstein

IPC: G02B27/42 ,  G02B6/02 ,  G02B6/293 ,  G02B27/01 ,  G02B27/28 ,  F21V8/00

Abstract: A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.

公开(公告)号：US11561507B2

公开(公告)日：2023-01-24

申请号：US16273068

申请日：2019-02-11

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Oleg Yaroshchuk ,  Wai Sze Tiffany Lam ,  Scott Charles McEldowney ,  Lu Lu

IPC: G03H1/02 ,  G03H1/04 ,  G03H1/18

Abstract: The invention relates to a method of creation of three-dimensional alignment patterns that includes providing a layer of optically recordable and polarization sensitive material having a thickness that is greater than, or equal to, a predefined thickness, and concurrently illuminating the optically recordable medium with two coherent beam of same or different polarization with predetermined angle between the beams such that the said beams impinge from the same side or from the opposite sides upon the layer of the recordable material. The invention further relates to polarization volume holograms based on the said alignment patterns and polarization holographic element including a single layer or a stack of several layers of optically recordable materials containing single or multiple polarization volume holograms.

公开(公告)号：US11428938B2

公开(公告)日：2022-08-30

申请号：US16726130

申请日：2019-12-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Oleg Yaroshchuk ,  Giuseppe Calafiore ,  Alireza Moheghi ,  Andrew Maimone ,  Barry David Silverstein

IPC: G02B27/01 ,  F21V8/00 ,  G02B6/34 ,  G02B27/00 ,  G02B27/42

Abstract: An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.

公开(公告)号：US11815680B2

公开(公告)日：2023-11-14

申请号：US17900540

申请日：2022-08-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Giuseppe Calafiore ,  Oleg Yaroshchuk ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/42 ,  G02B27/00

CPC classification number: G02B27/0101 ,  G02B5/18 ,  G02B5/1828 ,  G02B27/0081 ,  G02B27/0172 ,  G02B27/4272 ,  G02B2027/0123 ,  G02B2027/0159

Abstract: A device includes a waveguide. The device also includes a plurality of grating sets coupled with the waveguide and configured to, during a plurality of time periods, couple a plurality of input image lights into and out of the waveguide as a plurality of output image lights. In a first grating set of the plurality of grating sets, a first vector sum of in-plane projections of grating vectors associated with all gratings included in the first grating set is a first non-null vector. In a second grating set of the plurality of grating sets, a second vector sum of in-plane projections of grating vectors associated with all gratings included in the second grating set is a second non-null vector. The first vector sum and the second vector sum have different directions.

公开(公告)号：US20230060915A1

公开(公告)日：2023-03-02

申请号：US18049173

申请日：2022-10-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

IPC: G02B27/28 ,  G02B27/01 ,  G02B27/42 ,  G02F1/1362

Abstract: An example optical assembly includes a display, a light source for illuminating the display, and a diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a light director, wherein the DT-PBS is polarization sensitive and configured to direct, based on polarization, a first portion of light towards the display.

公开(公告)号：US11579511B2

公开(公告)日：2023-02-14

申请号：US17399735

申请日：2021-08-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Oleg Yaroshchuk ,  Junren Wang ,  Lu Lu

IPC: G02F1/29 ,  G02B27/01

Abstract: A device is provided. The device includes a first lens assembly controllable to switch between a first plurality of optical powers. The first lens assembly includes a plurality of directly optically coupled lenses, and is configured to converge or diverge a light transmitted therethrough. The device also includes a second lens assembly coupled with the first lens assembly, and controllable to switch between a second plurality of optical powers that are opposite to the first plurality of optical powers.

公开(公告)号：US11474352B2

公开(公告)日：2022-10-18

申请号：US17137530

申请日：2020-12-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Giuseppe Calafiore ,  Oleg Yaroshchuk ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/42 ,  G02B5/18

Abstract: A device includes a waveguide. The device also includes a plurality of grating sets coupled with the waveguide and configured to, during a plurality of time periods, couple a plurality of input image lights into the waveguide and couple the input image lights out of the waveguide as a plurality of output image lights. The plurality of input image lights have a substantially same input field of view (“FOV”) with a substantially same symmetry axis. A combined output FOV of the output image lights is larger than the input FOV.

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：US12282222B1

公开(公告)日：2025-04-22

申请号：US18493738

申请日：2023-10-24

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Sheng Ye ,  Ryan Li ,  Tingling Rao ,  Lafe Joseph Purvis, II ,  Oleg Yaroshchuk ,  Tanya Malhotra ,  Andrew John Ouderkirk

IPC: G02F1/1333 ,  C08J5/18 ,  C09K19/12 ,  C09K19/18 ,  C09K19/20 ,  C09K19/22 ,  C09K19/24 ,  C09K19/30 ,  C09K19/34 ,  C09K19/36 ,  G02F1/1335 ,  C09K19/58

Abstract: An optical film includes a plurality of helically arranged liquid crystals and organic solid crystal structures at least partially surrounding the plurality of helically arranged liquid crystals. A method of making the optical film includes obtaining a substrate with an alignment layer and a film of a first solution on the alignment layer. The first solution includes liquid crystals and organic crystal molecules. The liquid crystals form a plurality of helically arranged liquid crystals on the alignment layer. The method also includes forming organic solid crystal structures by crystallizing the organic crystal molecules. The organic solid crystal structures at least partially surround the plurality of helically arranged liquid crystals.

公开(公告)号：US12140730B2

公开(公告)日：2024-11-12

申请号：US17369861

申请日：2021-07-07

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Tingling Rao ,  Tanya Malhotra ,  Andrew John Ouderkirk ,  Lafe Joseph Purvis, II ,  Sandeep Rekhi ,  Arman Boromand ,  Sheng Ye ,  Oleg Yaroshchuk ,  Anurag Tyagi

IPC: G02B1/04 ,  C09D5/00 ,  C09D7/45 ,  C09D7/63 ,  C30B29/54 ,  G02B1/02 ,  G02B1/10 ,  G02B5/30

Abstract: An optical film includes an organic solid crystal film formed of a contiguous organic solid crystal having a first dimension no less than 100 micrometer and a second dimension distinct from the first dimension no less than one centimeter. Methods for making the organic solid crystal film are also described.