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2502 条记录 (耗时 0.032 秒)

    Refractive index modulation modification in a holographic grating
    71.
    发明授权
    Refractive index modulation modification in a holographic grating 有权

    公开(公告)号：US11327438B2

    公开(公告)日：2022-05-10

    申请号：US16550046

    申请日：2019-08-23

    申请人： Facebook Technologies, LLC

    发明人： Matthieu Charles Raoul Leibovici ,  Austin Lane ,  Wanli Chi ,  Hee Yoon Lee

    IPC分类号： G03H1/00 ,  G03H1/04 ,  G02B5/02 ,  G02B5/08 ,  G03H1/02 ,  G02B27/01

    摘要： Techniques disclosed herein relate to modifying refractive index modulation in a holographic optical element, such as a holographic grating. According to certain embodiments, a holographic optical element or apodized grating includes a polymer layer comprising a first region characterized by a first refractive index and a second region characterized by a second refractive index. The holographic optical element or apodized grating includes a plurality of nanoparticles dispersed in the polymer layer. The nanoparticles have a higher concentration in either the first region or the second region. In some embodiments, the nanoparticles may be configured to increase the refractive index modulation. In some embodiments, the nanoparticles may be configured to apodize the grating by decreasing the refractive index modulation proximate to sides of the grating. The refractive index may be modulated by applying a monomer reservoir buffer layer to the polymer layer, either before or after hologram fabrication.

    NB controller and form factors
    72.
    发明授权
    NB controller and form factors 有权

    公开(公告)号：US11300923B2

    公开(公告)日：2022-04-12

    申请号：US17082229

    申请日：2020-10-28

    申请人： Charles Northrup

    发明人： Charles Northrup

    IPC分类号： G03H1/00 ,  H04N5/225 ,  G03H1/02 ,  G03H1/22

    摘要： A system includes a plurality of optical identifiers and a reader for the optical identifiers. Each optical identifier has an optical substrate and a volume hologram (e.g., with unique data, such as a code page) in the optical substrate. The reader for the optical identifiers includes a laser, and a camera. The laser is configured to direct laser light into a selected one of the optical identifiers that has been placed into the reader to produce an image of the associated volume holograms at the camera. The camera is configured to capture the image. The captured image may be stored in a digital format by the system.

    Display device having light-transmitting member on optical unit
    77.
    发明授权
    Display device having light-transmitting member on optical unit 有权

    公开(公告)号：US11281007B2

    公开(公告)日：2022-03-22

    申请号：US16827755

    申请日：2020-03-24

    申请人： SEIKO EPSON CORPORATION

    发明人： Mitsutaka Ide ,  Toshiyuki Noguchi

    IPC分类号： G02B27/01 ,  G03H1/02 ,  G02B5/18

    摘要： A display device according to the present invention includes, along an optical path of image light emitted from an image light generating device, a first optical unit having positive power, a second optical unit having positive power and including a first diffraction element of a reflective type, a third optical unit having positive power, and a fourth optical unit having positive power and including a second diffraction element of a reflective type. The second optical unit includes a first light-transmitting member having optical power and provided at a first surface of the first diffraction element, and a light shielding member provided at a second surface of the first diffraction element.

    HOLOGRAPHIC RECONSTRUCTION DEVICE AND METHOD
    78.
    发明申请
    HOLOGRAPHIC RECONSTRUCTION DEVICE AND METHOD 有权

    公开(公告)号：US20220082999A1

    公开(公告)日：2022-03-17

    申请号：US17456287

    申请日：2021-11-23

    申请人： NAEILHAE, CO., LTD.

    发明人： Byung Mok KIM ,  Mal Eum SUNG ,  Seong Jin PARK ,  Sang Jin LEE

    IPC分类号： G03H1/04 ,  G03H1/02

    摘要： The present disclosure relates to improved holographic reconstruction device and a method. In one aspect, the present disclosure relates to improved holographic reconstruction device and method that can measure a digital hologram regardless of optical characteristics of an object to be measured, by an all-in-one type system integrating a transmissive system that measures an object transmitting light and a reflective system that measures an object reflecting light.