公开(公告)号：US20240264473A1

公开(公告)日：2024-08-08

申请号：US18418252

申请日：2024-01-20

Applicant: Meta Platforms Technologies, LLC

Inventor： Yuge HUANG ,  Tingling RAO ,  Sheng YE ,  Junren WANG ,  Lu LU ,  Hsien-Hui CHENG

IPC: G02F1/00 ,  G02F1/1333 ,  G03H1/02 ,  G03H1/22 ,  G02F1/1337

CPC classification number: G02F1/0045 ,  G02F1/133365 ,  G03H1/0256 ,  G03H1/2294 ,  G02F1/133788 ,  G03H2001/0264 ,  G03H2250/38

Abstract: A device includes a substrate, an alignment structure disposed on the substrate, and a layer of a birefringent medium disposed on the alignment structure. The birefringent medium has an extraordinary refractive index, an ordinary refractive index different from the extraordinary refractive index, and an intermediate refractive index between the extraordinary refractive index and the ordinary refractive index. Molecules of the birefringent medium are configured to form helical structures having a helical axis. The layer is configured with an out-of-plane principal refractive index along the helical axis, and two equal in-plane principal refractive indices within a plane perpendicular to the helical axis. The out-of-plane principal refractive index is equal to the intermediate refractive index, and is substantially the same as the two equal in-plane principal refractive indices.

公开(公告)号：US20220365266A1

公开(公告)日：2022-11-17

申请号：US17681191

申请日：2022-02-25

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Lu LU ,  Yitian DING ,  Yun-Han LEE ,  Junren WANG ,  Mengfei WANG

IPC: G02B5/32 ,  G02B5/30

Abstract: A device is provided. The device includes a first polarization hologram element having a first operating wavelength band and configured to selectively backwardly diffract or transmit a first light associated with the first operating wavelength band based on a polarization of the first light. The device also includes a second polarization hologram element having a second operating wavelength band and stacked with the first polarization hologram. A thickness of the first polarization hologram element is configured based on a signal-to-noise ratio between a diffraction efficiency of the first polarization hologram element for the first light and a diffraction efficiency of the first polarization hologram element for a second light associated with the second operating wavelength band being greater than a predetermined value.

公开(公告)号：US20240036316A1

公开(公告)日：2024-02-01

申请号：US17874211

申请日：2022-07-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Chulwoo OH ,  Hyunmin SONG ,  Junren WANG ,  Lu LU ,  Sawyer MILLER ,  Stefanie TAUSHANOFF ,  Yun-Han LEE

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/28

CPC classification number: G02B27/0172 ,  G02B5/3016 ,  G02B27/286 ,  G02B2027/0178

Abstract: A Pancharatnam-Berry phase (PBP) lens includes a substrate and one or more liquid crystal material layers on the substrate. The one or more liquid crystal material layers include a plurality of zones at different distances from a center of the PBP lens, where different zones of the plurality of zones of the one or more liquid crystal material layers have different liquid crystal twist angles along a surface-normal direction of the substrate and different phase delays for surface-normal incident light. The PBP lens can have an f-number less than 1, and can be used in a near-eye display system to project display images to an eye of a user at an efficiency greater than 75% at a peripheral region of the PBP lens.

公开(公告)号：US20230098118A1

公开(公告)日：2023-03-30

申请号：US17894052

申请日：2022-08-23

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Andrew MAIMONE ,  Junren WANG ,  Barry David SILVERSTEIN

IPC: G02B27/01 ,  G02B27/28 ,  G02B27/00 ,  G02B27/14 ,  G02B27/02 ,  G02B27/48 ,  G02B5/18 ,  G02B5/32 ,  G02B17/00 ,  G02B27/10

Abstract: An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.

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：US20220413205A1

公开(公告)日：2022-12-29

申请号：US17901851

申请日：2022-09-02

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: F21V8/00 ,  G02B27/01 ,  G03H1/02

Abstract: A device includes a display configured to generate an image light. The device also includes a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the device. The waveguide includes a grating including a birefringent material, and a birefringence of the grating is configured to increase along a pupil-expanding direction of the device.

公开(公告)号：US20230144920A1

公开(公告)日：2023-05-11

申请号：US17944183

申请日：2022-09-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Junren WANG ,  Yuge HUANG ,  Yun-Han LEE ,  Lu LU

IPC: G02F1/1334 ,  G02F1/13363 ,  G02F1/1337

CPC classification number: G02F1/13342 ,  G02F1/13363 ,  G02F1/133707

Abstract: A device is provided. The device includes a polarization hologram polymer layer having a wavy surface, an optic axis of the polarization hologram polymer layer being configured with a spatially varying orientation in a first predetermined in-plane direction. The device also includes a compensation layer disposed at the wavy surface of the polarization hologram polymer layer and configured to compensate for the wavy surface in shape.

公开(公告)号：US20230080580A1

公开(公告)日：2023-03-16

申请号：US17866463

申请日：2022-07-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Yun-Han LEE ,  Babak AMIRSOLAIMANI ,  Mengfei WANG ,  Junren WANG ,  Lu LU

IPC: G02B5/30 ,  G02B5/18 ,  G02B5/20

Abstract: A device includes a diffraction element and an optical filter stacked with the diffraction element. The optical filter is configured to forwardly deflect a light from a real-world environment incident onto the optical filter, at an incidence angle greater than or equal to a predetermined angle, toward the diffraction element. The diffraction element is configured to substantially transmit the light forwardly deflected by the optical filter.