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    Optical System
    1.
    发明公开
    Optical System 审中-公开

    公开(公告)号：US20240288826A1

    公开(公告)日：2024-08-29

    申请号：US18502256

    申请日：2023-11-06

    Applicant: Envisics Ltd

    Inventor： Jamieson Christmas

    IPC: G03H1/22 ,  G03H1/16

    CPC classification number: G03H1/2205 ,  G03H1/16 ,  G03H2001/0088 ,  G03H2001/221 ,  G03H2222/52 ,  G03H2223/16

    Abstract: There is provided an optical system having a viewing window. The optical system comprises a display device arranged to spatially modulated light in accordance with a hologram displayed thereon to form a holographic wavefront. The holographic wavefront forms a holographic reconstruction of an image downstream of the display device. The optical system further comprises a waveguide arranged to receive the holographic wavefront and waveguide the holographic wavefront between a pair of reflective surfaces thereof. One surface of the pair of reflective surfaces is partially transmissive such that a plurality of replicas of the holographic wavefront are emitted therefrom. The optical system further comprises an optical component between the holographic reconstruction and the waveguide, wherein the optical component is arranged to (a) form a virtual image of the holographic reconstruction upstream of the display device and (b) form an image of the displayed hologram at infinity or downstream of the waveguide.

    HOLOGRAPHIC PROJECTOR AND METHOD
    2.
    发明公开
    HOLOGRAPHIC PROJECTOR AND METHOD 审中-公开

    公开(公告)号：US20240241478A1

    公开(公告)日：2024-07-18

    申请号：US18495546

    申请日：2023-10-26

    Applicant: Envisics Ltd

    Inventor： Edward Boardman ,  Timothy Smeeton ,  Hugo Malin-Clegg ,  Daniel Burnham ,  Alexander Cole

    IPC: G03H1/22

    CPC classification number: G03H1/2205 ,  G03H1/2294 ,  G03H2001/221 ,  G03H2001/2234 ,  G03H2223/17 ,  G03H2223/23 ,  G03H2223/26

    Abstract: A holographic projector includes a display device arranged to form a holographic wavefront by spatially modulating light in accordance with a hologram of a picture. The holographic projector includes a magnification system including a first and second lens. The first lens is arranged form a holographic reconstruction of the picture by focusing the holographic wavefront towards a front focal plane of the first lens. The holographic reconstruction of the picture includes a plurality of pixels. The holographic projector includes a kinoform disposed between the first and second lens and arranged to apply a phase-delay to each pixel of the holographic reconstruction. The holographic projector includes a movement assembly arranged to move the kinoform such that a plurality of different phase-delays are applied to each pixel. The kinoform includes an array of zones and is arranged such that the width of each zone is substantially equal to the distance between adjacent pixels.

    Conjugate suppression
    10.
    发明授权
    Conjugate suppression 有权

    公开(公告)号：US11829106B2

    公开(公告)日：2023-11-28

    申请号：US17107094

    申请日：2020-11-30

    Applicant: Envisics Ltd

    Inventor： Ian Bledowski

    IPC: G03H1/20 ,  G03H1/22

    CPC classification number: G03H1/2294 ,  G03H1/2205 ,  G03H2001/221 ,  G03H2001/2236 ,  G03H2222/34

    Abstract: A holographic projector and method of holographic projection is disclosed. A first array of light-modulating pixels displays a first hologram and a second array of light-modulating pixels displays second hologram. A first light source illuminates the first array of pixels such that a first holographic reconstruction, comprising a first zero-order replay field, is formed on a replay plane and a second light source illuminates the second array of pixels such that a second holographic reconstruction, comprising a second zero-order replay field, is formed on the replay plane. Real image content of the first holographic reconstruction is restricted to a first sub-area of the first zero-order replay field and real image content of the second holographic reconstruction is restricted to a first sub-area of the second zero-order replay field. The holographic projector is arranged such that the first zero-order replay field and the second zero-order replay field are no more than partially overlapping. The first sub-area of the first zero-order replay field and the first sub-area of the second zero-order replay field form a continuous display area of the holographic projector.

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