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    LIGHT MODULATOR DEVICE USED FOR A DISPLAY FOR THE PRESENTATION OF TWO- AND/OR THREE-DIMENSIONAL IMAGE CONTENTS
    13.
    发明申请
    LIGHT MODULATOR DEVICE USED FOR A DISPLAY FOR THE PRESENTATION OF TWO- AND/OR THREE-DIMENSIONAL IMAGE CONTENTS 有权

    公开(公告)号：US20210278694A1

    公开(公告)日：2021-09-09

    申请号：US17315949

    申请日：2021-05-10

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Bo KROLL ,  Norbert LEISTER ,  Gerald FUTTERER ,  Robert MISSBACH ,  Stephan REICHELT

    IPC: G02B30/00 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/29 ,  G03H1/02 ,  G03H1/22

    Abstract: The invention relates to a light modulation device for a display for representing two- and/or three-dimensional image content or image sequences. The light modulation device comprises a light modulator and a controller. The phase and/or the amplitude of a light wave field, which is substantially collimated, can be varied by means of the light modulator depending on the location of the light modulator. The light modulator can be actuated by means of the control device. According to the invention, in the direction of propagation of the light wave field, at least one diffracting unit is arranged downstream of the light modulator. The diffracting unit has a variable diffracting structure. By means of the diffracting structure, the light wave field varied by the light modulator can be diffracted in a variable and predeterminable manner. Further, the present invention relates to a display and a method for producing a light modulation device.

    DEVICE FOR COMBINING LIGHT BEAMS WHICH INTERACT WITH ADJACENTLY ARRANGED PIXELS OF A LIGHT MODULATOR
    14.
    发明申请
    DEVICE FOR COMBINING LIGHT BEAMS WHICH INTERACT WITH ADJACENTLY ARRANGED PIXELS OF A LIGHT MODULATOR 有权

    公开(公告)号：US20210109404A1

    公开(公告)日：2021-04-15

    申请号：US17129059

    申请日：2020-12-21

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert LEISTER ,  Stephan REICHELT

    IPC: G02F1/1335 ,  G02F1/13363 ,  G03H1/22

    Abstract: A device for combining light beams which interact with adjacently arranged pixels of a light modulator, having a beam splitting component, a beam combining component, and a beam superposition component. The beam splitting component is configured such that incident light beams are split into a first subbeam and a second subbeam so that the first subbeam propagates toward a first pixel of the light modulator and the second subbeam propagates toward a second pixel of the light modulator. The beam combining component is configured and arranged so that the first subbeam and the second subbeam are combined after interaction with pixels of the light modulator. The beam splitting component and the beam combining component are configured and arranged in such a way that a sum of optical path lengths of the first subbeam and the second subbeam is respectively constant for different angles of incidence.

    HOLOGRAPHIC DIRECT VIEW DISPLAY HAVING AN APODIZATION DEVICE
    16.
    发明申请
    HOLOGRAPHIC DIRECT VIEW DISPLAY HAVING AN APODIZATION DEVICE 有权
    具有APODIZED设备的全息直观视图显示

    公开(公告)号：US20140198361A1

    公开(公告)日：2014-07-17

    申请号：US14212706

    申请日：2014-03-14

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert LEISTER ,  Stephan REICHELT

    IPC: G03H1/08

    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 。

    LIGHT MODULATOR HAVING A SWITCHABLE VOLUME GRATING
    17.
    发明申请
    LIGHT MODULATOR HAVING A SWITCHABLE VOLUME GRATING 审中-公开
    具有可切换体积光栅的光调制器

    公开(公告)号：US20130342887A1

    公开(公告)日：2013-12-26

    申请号：US13921608

    申请日：2013-06-19

    Applicant: SeeReal Technologies S.A.

    Inventor： Norbert LEISTER ,  Gerald FUETTERER

    IPC: G02F1/01

    CPC classification number: G02F1/01 ,  G02F1/13342 ,  G02F2201/307 ,  G03H1/02 ,  G03H1/0248 ,  G03H1/2294 ,  G03H2001/0224 ,  G03H2225/13

    Abstract: Spatial light modulator configured as a periodic structure of polymer grating layers arranged essentially at equal distances and intermediate spaces to form a periodic grating structure. The surfaces bounding the periodic grating structure have electrodes influencing the refractive index of the active optical medium by an electric field. The electrodes have a pixelated arrangement and can be driven independently of each other with an electrical voltage. The orientation layer thickness and grating period of the periodic grating structure are configured so that they do not correspond to the Bragg condition for the light from at least one light source, and so that for light from the at least one light source incident on the spatial light modulator the light fraction deviated owing to Bragg diffraction is less than the undeviated transmitted light fraction.

    Abstract translation: 空间光调制器被配置为聚合物光栅层的周期性结构，其基本上以相等的距离和中间空间排列，以形成周期性的光栅结构。 界定周期性光栅结构的表面具有通过电场影响有源光学介质的折射率的电极。 电极具有像素化布置并且可以用电压彼此独立地驱动。 周期性光栅结构的取向层厚度和光栅周期被配置为使得它们不对应于来自至少一个光源的光的布拉格条件，并且使得对于来自入射到空间上的至少一个光源的光 光调制器由于布拉格衍射而偏离的光分数小于未变形的透射光分数。

    METHOD AND DEVICE FOR ENCODING COMPLEX-VALUE SIGNALS FOR THE RECONSTRUCTION OF THREE-DIMENSIONAL OBJECTS
    18.
    发明公开
    METHOD AND DEVICE FOR ENCODING COMPLEX-VALUE SIGNALS FOR THE RECONSTRUCTION OF THREE-DIMENSIONAL OBJECTS 审中-公开

    公开(公告)号：US20240134313A1

    公开(公告)日：2024-04-25

    申请号：US18464684

    申请日：2023-09-11

    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.

    METHOD AND DEVICE FOR ENCODING COMPLEX-VALUE SIGNALS FOR THE RECONSTRUCTION OF THREE-DIMENSIONAL OBJECTS
    19.
    发明申请
    METHOD AND DEVICE FOR ENCODING COMPLEX-VALUE SIGNALS FOR THE RECONSTRUCTION OF THREE-DIMENSIONAL OBJECTS 有权

    公开(公告)号：US20210208536A1

    公开(公告)日：2021-07-08

    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 ,  G03H1/32 ,  G03H1/16 ,  G06T9/00

    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.

    DISPLAY DEVICE COMPRISING A LIGHT GUIDE
    20.
    发明申请
    DISPLAY DEVICE COMPRISING A LIGHT GUIDE 审中-公开

    公开(公告)号：US20200183079A1

    公开(公告)日：2020-06-11

    申请号：US16614407

    申请日：2018-05-18

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert LEISTER

    IPC: F21V8/00 ,  G02F1/29 ,  G02B27/01 ,  G03H1/22

    Abstract: The invention relates to a display device, in particular a provided near-to-eye display device of a user. The display device comprises at least one illumination device, at least one spatial light modulator device, at least one imaging element, at least one light guide, and at least two partially-reflective decoupling elements. The at least one illumination device is used for emitting sufficiently coherent light. The at least one imaging element is provided for imaging light originating from the at least one light modulator device. The at least two partially-reflective decoupling elements, which are provided in the at least one light guide, are used for coupling the light out of the light guide.

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