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    Apparatus and method for in-line holographic imaging
    4.
    发明授权
    Apparatus and method for in-line holographic imaging 有权

    公开(公告)号：US10684589B2

    公开(公告)日：2020-06-16

    申请号：US15847521

    申请日：2017-12-19

    申请人： IMEC vzw

    发明人： Abdulkadir Yurt ,  Geert Vanmeerbeeck ,  Richard Stahl ,  Ziduo Lin

    IPC分类号： G03H1/02 ,  G03H1/00 ,  G03H1/04 ,  G03H1/12

    摘要： An apparatus for in-line holographic imaging is disclosed. In one aspect, the apparatus includes at least a first light source and a second light source arranged for illuminating an object arranged in the apparatus with a light beam. The apparatus also includes an image sensor arranged to detect at least a first and a second interference pattern, wherein the first interference pattern is formed when the object is illuminated by the first light source and the second interference pattern is formed when the object is illuminated by the second light source. The first and second interference patterns are formed by diffracted light, being scattered by the object, and undiffracted light of the light beam. The at least first and second light sources are arranged at different angles in relation to the object, and possibly illuminate the object using different wavelengths.

    HOLOGRAM CALCULATION
    5.
    发明申请
    HOLOGRAM CALCULATION 审中-公开

    公开(公告)号：US20200166890A1

    公开(公告)日：2020-05-28

    申请号：US16665174

    申请日：2019-10-28

    申请人： Dualitas Ltd

    发明人： Neil Collings ,  Jamieson Christmas

    IPC分类号： G03H1/08 ,  G03H1/04 ,  G03H1/16 ,  G03H1/12

    摘要： A holographic display method includes calculating a hologram, displaying it on a spatial light modulator (SLM) and illuminating it with coherent light. The hologram includes hologram pixels each having a hologram pixel value. The hologram is calculated using steps including: performing the inverse Fourier transform of the product of an object field and a negative quadratic phase exponential representative of positive optical power; and restricting each calculated hologram pixel value to one of a plurality (greater than two) of allowable pixel values to form a constrained hologram, which is displayed on the SLM. Each light-modulating pixel of the SLM is operable in a plurality of light-modulation levels corresponding to the plurality of allowable pixel values. The SLM is illuminated with coherent light to form a replay field including conjugate images: a real holographic reconstruction and a virtual holographic reconstruction having greater intensity than that of the real holographic reconstruction.

    SPATIAL LIGHT MODULATOR FOR HOLOGRAPHIC PROJECTION
    6.
    发明申请
    SPATIAL LIGHT MODULATOR FOR HOLOGRAPHIC PROJECTION 审中-公开

    公开(公告)号：US20200150590A1

    公开(公告)日：2020-05-14

    申请号：US16680282

    申请日：2019-11-11

    申请人： Dualitas Ltd

    发明人： Jamieson Christmas

    IPC分类号： G03H1/22 ,  G03H1/12 ,  G03H1/00 ,  G03H1/08

    摘要： There is provided a spatial light modulator arranged to display a light modulation pattern comprising a hologram. The spatial light modulator comprises a liquid crystal on silicon spatial light modulator having a plurality of pixels. The hologram has a plurality of pixels. The spatial light modulator comprises a silicon backplane. Each pixel of the spatial light modulator comprises a light-modulating element and a respective pixel circuit. Each pixel circuit is embedded in the silicon backplane. Each pixel circuit is arranged to drive the corresponding light-modulating element. Each pixel circuit is further arranged to combine a received pixel value of the hologram with a corresponding pixel value of the light processing function such that the light modulation pattern further comprises the light processing function. The light processing function comprises a lens function and/or a grating function.

    Display method and display apparatus
    7.
    发明授权
    Display method and display apparatus 有权

    公开(公告)号：US10534317B2

    公开(公告)日：2020-01-14

    申请号：US15936010

    申请日：2018-03-26

    申请人： OLYMPUS CORPORATION

    发明人： Yoshiaki Horikawa

    IPC分类号： G03H1/12 ,  G02B27/10 ,  G02B5/32 ,  G03H1/22 ,  G02F1/1335

    摘要： A display method lets a display beam to propagate in a transparent substrate while internally reflected repeatedly and lets the display beam partly emit out of the transparent substrate every time the display beam is internally reflected, thereby emitting display beams from almost entirety of a surface of the transparent substrate. The display beam is produced holographically. A display apparatus includes a spatial phase modulator that produces a display beam, a transparent substrate in which the display beam is internally reflected repeatedly to propagate in it, and a splitter that lets the display beam partly emit out of the transparent substrate every time the display beam is internally reflected.

    Spatial light modulator and method for displaying computer generated hologram using the same
    8.
    发明授权
    Spatial light modulator and method for displaying computer generated hologram using the same 有权

    公开(公告)号：US10126710B2

    公开(公告)日：2018-11-13

    申请号：US15113949

    申请日：2016-01-14

    申请人： BOE TECHNOLOGY GROUP CO., LTD.

    发明人： Naifu Wu ,  Bei Niu ,  Tao Wang ,  Wei Wei ,  Kun Wu ,  Chia Chiang Lin ,  Chunmiao Zhou

    IPC分类号： G03H1/12 ,  G02B5/32 ,  G03H1/22

    摘要： A spatial light modulator and a method for displaying a computer generated hologram are disclosed. The spatial light modulator includes a plurality of MEMS units arranged in an array, each of the MEMS units corresponds to a pixel of a computer generated hologram and includes a sensing device, a light shielding portion and a driving device. The sensing device is configured for receiving position information that is obtained through Roman encoding a pixel corresponding to an MEMS unit including the sensing device and the position information is transmitted to the driving device by the sensing device. The driving device is configured for controlling the light shielding portion to move to a position corresponding to the position information in response to the received position information of the light shielding portion when the present frame is displayed.

    Holographic wide field of view display
    9.
    发明授权
    Holographic wide field of view display 有权

    公开(公告)号：US10108144B2

    公开(公告)日：2018-10-23

    申请号：US15268269

    申请日：2016-09-16

    申请人： Microsoft Technology Licensing, LLC

    发明人： Steven John Robbins ,  Andrew Maimone ,  Andreas Georgiou ,  Joel Steven Kollin

    IPC分类号： G03H1/04 ,  G02B27/00 ,  G02B27/01 ,  G03H1/00 ,  G03H1/12 ,  G03H1/22 ,  G03H1/26 ,  G03H1/02

    摘要： A head-mounted display device comprises a rendering engine configured to generate a hologram representative of a three-dimensional object. The hologram includes depth information that causes the three-dimensional object to be rendered with a focus that is determined by the depth information. The device also includes a spatial light modulator that modulates light from a light source as indicated by the hologram. A switchable hologram comprises multiple stacked switchable gratings. Each of the stacked switchable gratings is associated with one or more resulting exit pupil locations on a viewing surface. The system also comprises an eye tracker configured to map a viewing direction of a user's eye to a viewing location on the viewing surface. A processor is configured to activate a particular switchable grating within the switchable transmission hologram that is associated with an exit pupil location that aligns with the viewing location.