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    LIGHT GUIDE DISPLAY SYSTEM FOR PROVIDING INCREASED PIXEL DENSITY
    2.
    发明公开
    LIGHT GUIDE DISPLAY SYSTEM FOR PROVIDING INCREASED PIXEL DENSITY 审中-公开

    公开(公告)号：US20230161217A1

    公开(公告)日：2023-05-25

    申请号：US17535502

    申请日：2021-11-24

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Xiayu FENG ,  Sihui HE ,  Zhexin ZHAO ,  Lu LU

    IPC: G02F1/29 ,  G02B27/01

    CPC classification number: G02F1/292 ,  G02B27/0172 ,  G02B2027/014 ,  G02B2027/0178

    Abstract: A device includes a light guide and an in-coupling element coupled with the light guide and configured to couple an input image light into the light guide. The device also includes an out-coupling element coupled with the light guide and configured to couple the input image light out of the light guide as an output image light, and a controller configured to control at least one of the in-coupling element or the out-coupling element during a first time period and a second time period. The out-coupling element outputs a first output image light having a first field of view (“FOV”) during the first time period, and a second output image light having a second FOV during the second time period. The first FOV substantially overlaps with the second FOV, and an axis of symmetry of the first FOV is rotated relative to an axis of symmetry of the second FOV.

    PVH IN-BAND CHROMATIC CORRECTION USING METASURFACE
    3.
    发明申请
    PVH IN-BAND CHROMATIC CORRECTION USING METASURFACE 有权

    公开(公告)号：US20220365482A1

    公开(公告)日：2022-11-17

    申请号：US17322453

    申请日：2021-05-17

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Hao YU ,  Dianmin LIN ,  Lu LU ,  Xiayu FENG ,  Mengfei WANG ,  Barry David SILVERSTEIN

    IPC: G03H1/02 ,  G02B27/00 ,  G03H1/18 ,  G02B27/01

    Abstract: An optical device includes an optical component (e.g., a polarization volume hologram, a geometric phase device, or a polarization-insensitive diffractive optical element) having a uniform thickness and configured to modify a wavefront of a light beam that includes light in two or more wavelengths visible to human eyes, where the optical component has a chromatic aberration between the two or more wavelengths. The optical device also includes a metasurface on the optical component. The metasurface includes a plurality of nanostructures configured to modify respective phases of incident light at a plurality of regions of the metasurface, where the plurality of nanostructures is configured to, at each region of the plurality of regions, add a respective phase delay for each of the two or more wavelengths to correct the chromatic aberration between the two or more wavelengths.

    SYSTEM AND METHOD FOR MEASURING SATELLITE GHOST EFFICIENCY OF DIFFRACTIVE LENS
    5.
    发明公开
    SYSTEM AND METHOD FOR MEASURING SATELLITE GHOST EFFICIENCY OF DIFFRACTIVE LENS 审中-公开

    公开(公告)号：US20240210272A1

    公开(公告)日：2024-06-27

    申请号：US18086638

    申请日：2022-12-21

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Yiyang WU ,  Hsien-Hui CHENG ,  Xuan WANG ,  Lu LU

    IPC: G01M11/02

    CPC classification number: G01M11/0207

    Abstract: A system for measuring a satellite ghost efficiency of a diffractive lens is provided. The system includes a light source configured to output a first probing beam, and a beam tweaking assembly disposed between the light source and the diffractive lens, and configured to convert the first probing beam into a second probing beam that is a non-collimated beam. The diffractive lens diffracts the second probing beam into a plurality of diffracted beams including a first diffracted beam of a parent diffraction order and a second diffracted beam of a satellite ghost diffraction order. The beam tweaking assembly includes one or more optical lenses, and an adjustable optical power. The system also includes a detector configured to generate a beam spot pattern including a first beam spot corresponding to the first diffracted beam and a second beam spot corresponding to the second diffracted beam.

    POLARIZATION INTERFERENCE PATTERN GENERATION FOR DEPTH SENSING
    6.
    发明公开
    POLARIZATION INTERFERENCE PATTERN GENERATION FOR DEPTH SENSING 审中-公开

    公开(公告)号：US20240175676A1

    公开(公告)日：2024-05-30

    申请号：US18071298

    申请日：2022-11-29

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Yun-Han LEE ,  Scott Charles MCELDOWNEY ,  Lu LU ,  Mantas ZURAUSKAS ,  Qing CHAO

    IPC: G01B11/22 ,  G02F1/01

    CPC classification number: G01B11/22 ,  G02F1/0136 ,  G02B27/283

    Abstract: According to examples, a depth sensing apparatus may include an illumination source to output a light beam onto a polarizing beam separation element (PBSE). The PBSE may generate a right hand circularly polarized (RCP) beam and a left hand circularly polarized (LCP) beam to be projected onto a target area, in which the RCP beam and the LCP beam may create an interference with respect to each other. The depth sensing apparatus also includes an imaging component to capture an image of the target area with the RCP beam and the LCP beam projected on the target area, in which the captured image is to be analyzed for depth sensing of the target area. The depth sensing apparatus further includes a polarizer that may increase an intensity of the interference pattern.

    ACCOMMODATION INTEGRATED FOLDING LENS ASSEMBLY
    9.
    发明公开
    ACCOMMODATION INTEGRATED FOLDING LENS ASSEMBLY 审中-公开

    公开(公告)号：US20230305490A1

    公开(公告)日：2023-09-28

    申请号：US18167680

    申请日：2023-02-10

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Lu LU ,  Xuan WANG ,  Hsien-Hui CHENG

    IPC: G03H1/02 ,  G02B27/01 ,  G02B27/04 ,  G02B3/00

    CPC classification number: G03H1/0248 ,  G02B27/0179 ,  G02B27/04 ,  G02B3/0037 ,  G03H2001/226

    Abstract: A device includes a display element, and a lens assembly coupled with the display element. The lens assembly includes a first polarization selective reflector and a second polarization selective reflector each configured to be switchable between operating in an active state and a non-active state. The lens assembly includes a polarization non-selective partial reflector disposed between the first and second polarization selective reflectors. The device includes a controller configured to control, during a first time period, the display element to display a first virtual object, the first polarization selective reflector to operate in the active state, and the second polarization selective reflector to operate in the non-active state, and control, during a second time period, the display element to display a second virtual object, the first polarization selective reflector to operate in the non-active state, and the second polarization selective reflector to operate in the active state.

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