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    Hybrid varifocal lens
    24.
    发明授权
    Hybrid varifocal lens 有权

    公开(公告)号：US11852949B1

    公开(公告)日：2023-12-26

    申请号：US17176863

    申请日：2021-02-16

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Lu Lu ,  Wai Sze Tiffany Lam ,  Yusufu Njoni Bamaxam Sulai

    IPC: G02F1/29

    CPC classification number: G02F1/29 ,  G02F1/294 ,  G02F2202/40 ,  G02F2203/28

    Abstract: A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.

    Prism based light redirection system for eye tracking systems
    28.
    发明授权
    Prism based light redirection system for eye tracking systems 有权

    公开(公告)号：US11579451B1

    公开(公告)日：2023-02-14

    申请号：US17070678

    申请日：2020-10-14

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Wai Sze Tiffany Lam ,  Yusufu Njoni Bamaxam Sulai ,  Robin Sharma ,  Ying Geng ,  Lu Lu ,  Jacques Gollier

    IPC: G02B27/01 ,  G02B27/00 ,  G02B5/04 ,  G06F3/01 ,  F21V8/00

    Abstract: A head-mounted device (HMD) contains a display, an optics block, a redirection structure, and an eye tracking system. The display is configured to emit image light and provide it to an eye of a user. The optics block is configured to direct the emitted light in order to allow it to reach the eye. The eye tracking system contains a camera, an illumination source, and a controller. The camera is configured to capture image data using infrared light reflected from the eye. The controller is configured to use this image data to determine eye tracking information. The illumination source is configured to illuminate the eye with infrared light for the purpose of taking eye tracking measurements. The redirection structure is configured to direct infrared light reflected from the eye to the eye tracking system. In multiple embodiments, redirection structures may comprise prism arrays, lenses, liquid crystal layers, or grating structures.

    Light guide display assembly for providing expanded field of view
    30.
    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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