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    Optical device including optically anisotropic molecules having intermediate pretilt angles
    4.
    发明授权
    Optical device including optically anisotropic molecules having intermediate pretilt angles 有权

    公开(公告)号：US11624864B2

    公开(公告)日：2023-04-11

    申请号：US17209205

    申请日：2021-03-22

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Junren Wang ,  Lu Lu ,  Hyunmin Song ,  Yun-Han Lee

    IPC: G02F1/1337 ,  G02F1/1335 ,  G02B5/30 ,  G02B5/02

    Abstract: An optical element is provided. The optical element includes an optical film including a birefringent material having a chirality. Optically anisotropic molecules of the birefringent material disposed adjacent a first surface of the optical film are configured with a first pretilt angle in a range of greater than 10° and less than 80°, or in a range of greater than −80° and less than −10°. Optically anisotropic molecules of the birefringent material disposed adjacent a second surface of the optical film opposing the first surface are configured with a second pretilt angle in the range of greater than 10° and less than 80°, or in the range of greater than −80° and less than −10°.

    Optical assemblies having polarization volume gratings for projecting augmented reality content
    9.
    发明授权
    Optical assemblies having polarization volume gratings for projecting augmented reality content 有权

    公开(公告)号：US11624922B2

    公开(公告)日：2023-04-11

    申请号：US17326074

    申请日：2021-05-20

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Brian Wheelwright ,  Yun-Han Lee ,  Babak Amirsolaimani ,  Weichuan Gao

    IPC: G02B27/01

    Abstract: An optical assembly for projecting light output by a display includes an optical waveguide, a reflective optical element, and a in-coupler coupled with the optical waveguide. The reflective optical element is positioned to receive first light and to reflect the first light as second light. The in-coupler is positioned to receive the first light and transmit the first light toward the reflective optical element. The in-coupler is further positioned to receive the second light and redirect a first portion of the second light so that the first portion of the second light undergoes total internal reflection inside the optical waveguide. The reflective optical element includes a negative meniscus lens having a concave lens surface and a convex lens surface coupled with a reflective surface. The reflective optical element is positioned to focus the first light such that the second light is more collimated than the first light.

    Light guide display assembly for providing expanded field of view
    10.
    发明授权
    Light guide display assembly for providing expanded field of view 有权

    公开(公告)号：US11567332B2

    公开(公告)日：2023-01-31

    申请号：US17706581

    申请日：2022-03-28

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Scott Charles Mceldowney ,  Babak Amirsolaimani ,  Yun-Han Lee ,  Lu Lu ,  Mengfei Wang ,  Junren Wang

    IPC: G02B27/01 ,  F21V8/00

    Abstract: A device includes a light guide. The device also includes a first in-coupling element configured to couple a first input light into the light guide, and a first out-coupling element configured to couple the first input light out of the light guide as a first output light having a first output field of view (“FOV”). The device also includes a second in-coupling element configured to couple a second input light into the light guide. The device further includes a second out-coupling element configured to couple the second input light out of the light guide as a second output light having a second output FOV substantially non-overlapping with the first output FOV. A combination of the first and second output FOVs is larger than at least one of the first or second output FOV, and the first and second input lights have orthogonal polarizations.

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