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    Peripheral see-through pancake lens assembly and display device with same
    6.
    发明授权
    Peripheral see-through pancake lens assembly and display device with same 有权

    公开(公告)号：US11586024B1

    公开(公告)日：2023-02-21

    申请号：US16532311

    申请日：2019-08-05

    申请人： META PLATFORMS TECHNOLOGIES, LLC

    发明人： Ying Geng ,  Brian Wheelwright ,  Jacques Gollier ,  Yusufu Njoni Bamaxam Sulai ,  Babak Amirsolaimani ,  Weichuan Gao ,  Gang Li ,  Mengfei Wang

    IPC分类号： G02B17/08 ,  G02B3/08

    摘要： An optical assembly includes at least one substrate that provides a first curved surface and a second surface. The optical assembly also includes a beam splitter on the first curved surface, a reflector on the second surface, and an optical retarder disposed between the beam splitter and the reflector. The optical assembly is configured to receive first light at the first curved surface and reflect the first light at the reflector and subsequently, at the beam splitter before outputting the first light from the reflector. The first light is transmitted through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light at a second optical power that is less than the first optical power. The second light is transmitted through peripheral portions of the beam splitter and reflector without reflection at the reflector.

    NONLINEAR CONSECUTIVE SCANNING PROJECTOR
    9.
    发明公开
    NONLINEAR CONSECUTIVE SCANNING PROJECTOR 审中-公开

    公开(公告)号：US20230258923A1

    公开(公告)日：2023-08-17

    申请号：US17825661

    申请日：2022-05-26

    申请人： Meta Platforms Technologies, LLC

    发明人： Brian Wheelwright ,  Daniel Guenther Greif ,  Jacques Gollier

    IPC分类号： G02B26/10 ,  G02B26/08

    CPC分类号： G02B26/101 ,  G02B26/0816

    摘要： A scanning projector is disclosed, including a light engine for providing a light beam, a beam scanner for scanning the light beam about two axes, and a controller operably coupled to the light engine and the beam scanner and configured to cause the beam scanner to non-linearly scan the light beam about the first and second axes within the field of view while varying brightness of the light beam to provide the image. The nonlinear scanning is performed such that consecutive scans provide conterminous portions of the image. This enables one to increase a local rate of providing the image across at least 75% of an area of the field of view is greater than 1500 degrees per second. The high local rate results in a significant reduction of artifacts caused by motion of displayed object, the users eyes or head, etc.