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：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.

公开(公告)号：US11675118B2

公开(公告)日：2023-06-13

申请号：US17363982

申请日：2021-06-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Tanya Malhotra ,  Tingling Rao ,  Liliana Ruiz Diaz ,  Oleg Yaroshchuk ,  Sheng Ye ,  Andrew John Ouderkirk ,  Alexander Koshelev ,  Lafe Joseph Purvis, II ,  Junren Wang ,  Arman Boromand

IPC: G02B5/30

CPC classification number: G02B5/3041 ,  G02B5/3016 ,  C09K2323/03 ,  C09K2323/031 ,  C09K2323/035

Abstract: A film stack includes a plurality of first films and a plurality of second films alternately stacked. At least one second film of the plurality of second films includes a solid crystal including crystal molecules aligned in a predetermined alignment direction. At least one first film of the plurality of first films includes an alignment structure configured to at least partially align the crystal molecules of the solid crystal in the predetermined alignment direction.

公开(公告)号：US11639559B2

公开(公告)日：2023-05-02

申请号：US17159746

申请日：2021-01-27

Applicant: Meta Platforms Technologies, LLC

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

IPC: C30B29/60 ,  C30B29/54 ,  G02B1/08 ,  G02B5/30 ,  C30B23/02 ,  C30B11/00 ,  C30B30/04 ,  C30B30/02

Abstract: An optical element is provided. The optical element includes a solid crystal including crystal molecules aligned in a predetermined alignment pattern at least partially defined by an alignment structure.

公开(公告)号：US11513362B2

公开(公告)日：2022-11-29

申请号：US16872101

申请日：2020-05-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

IPC: G02B27/28 ,  G02B27/01 ,  G02B27/42 ,  G02F1/1362 ,  G02F1/1335 ,  G02B5/30 ,  G02B27/00

Abstract: An example optical assembly includes a display, a light source for illuminating the display, and a first diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a first light director, wherein the first 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：US11480807B2

公开(公告)日：2022-10-25

申请号：US16872101

申请日：2020-05-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Oleg Yaroshchuk

IPC: G02B27/28 ,  G02B27/01 ,  G02B27/42 ,  G02F1/1362 ,  G02F1/1335 ,  G02B5/30 ,  G02B27/00

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