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    Method and device for encoding complex-value signals for the reconstruction of three-dimensional objects
    25.
    发明授权
    Method and device for encoding complex-value signals for the reconstruction of three-dimensional objects 有权

    公开(公告)号：US11754972B2

    公开(公告)日：2023-09-12

    申请号：US16071096

    申请日：2017-01-18

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Stefan Reichelt ,  Norbert Leister ,  Anne Frauenhofer

    IPC: G03H1/08 ,  G03H1/16 ,  G03H1/32 ,  G06T9/00

    CPC classification number: G03H1/0808 ,  G03H1/16 ,  G03H1/32 ,  G06T9/00 ,  G03H2001/0816

    Abstract: A method for encoding complex-valued signals of a computer-generated hologram into a phase-modulating optical element for the reconstruction of a three-dimensional object, and to a computer program product for encoding complex-valued signals of a computer-generated hologram, and to a holographic display for the reconstruction of a three-dimensional object. The object is to reduce the effort on encoding a complex-valued spatial distribution by an iteration method on the basis of phase encoding, so that the computer-generated hologram resulting therefrom can be represented more rapidly and with the same or an improved reconstruction quality. In particular, the convergence during the iterative optimization is intended to be accelerated. This is achieved by a method in which degrees of freedom of the hologram plane as well as the reconstruction plane are used for optimizing the iteration method for rapid convergence and maximization of the diffraction efficiency in the signal range.

    Holographic direct view display having an apodization device
    28.
    发明授权
    Holographic direct view display having an apodization device 有权
    具有变迹装置的全息直视图

    公开(公告)号：US09041989B2

    公开(公告)日：2015-05-26

    申请号：US14212706

    申请日：2014-03-14

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert Leister ,  Stephan Reichelt

    IPC: G02B5/32 ,  G03H1/08 ,  G03H1/22

    CPC classification number: G03H1/0808 ,  G03H1/2286 ,  G03H1/2294 ,  G03H2001/0224 ,  G03H2001/0816 ,  G03H2001/2242 ,  G03H2001/2271 ,  G03H2222/18 ,  G03H2222/35 ,  G03H2223/12 ,  G03H2225/55

    Abstract: The invention relates to apodization in a holographic direct view display. Known apodization functions are utilized/modified for an apodization mask such that the functions reduce the intensities of selected higher magnitudes of diffractions. The holographic direct view display comprises a controllable light modulator having modulator cells and modulating impinging coherent light into a phase and/or amplitude, and an array of apodization masks. The apodization masks have the same apodization function for a predetermined group of modulator cells, by means of which function a complex amplitude transparency can be set for the modulator cells. This transparency corresponds to an individually predefined course of intensity in a far field of the light modulator, wherein the predefined course of intensity includes a reducing of the light intensity of higher magnitudes of diffractions, and/or of the interfering light emitted by the light modulator.

    Abstract translation: 本发明涉及全息直视图显示中的变迹。 对于变迹掩模使用/修改已知的变迹函数，使得函数降低所选择的更高的衍射幅度的强度。 全息直视图显示器包括具有调制器单元并将入射相干光调制成相位和/或幅度的可控光调制器以及变迹掩模阵列。 变迹掩模对于预定的一组调制器单元具有相同的变迹功能，通过该调制器单元，功能可以为调制器单元设置复振幅透明度。 该透明度对应于光调制器的远场中的单独预定的强度过程，其中预定的强度过程包括降低较高的衍射幅度和/或由光调制器发射的干涉光的光强度 。

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