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    Beam divergence and various collimators for holographic or stereoscopic displays
    31.
    发明授权
    Beam divergence and various collimators for holographic or stereoscopic displays 有权

    公开(公告)号：US10295959B2

    公开(公告)日：2019-05-21

    申请号：US15191596

    申请日：2016-06-24

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Gerald Futterer

    IPC: F21V8/00 ,  G02B5/32 ,  G03H1/02 ,  G03H1/08 ,  G03H1/22 ,  G03H1/30 ,  G02B27/00 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/1362

    Abstract: A holographic display with an illumination device, an enlarging unit and a light modulator. The illumination device includes at least one light source and a light collimation unit, the light collimation unit collimates the light of the at least one light source and generates a light wave field of the light that is emitted by the light source with a specifiable angular spectrum of plane waves, the enlarging unit is disposed downstream of the light collimation unit, seen in the direction of light propagation, where the enlarging unit includes a transmissive volume hologram realizing an anamorphic broadening of the light wave field due to a transmissive interaction of the light wave field with the volume hologram, and the light modulator is disposed upstream or downstream of the anamorphic enlarging unit, seen in the direction of light propagation.

    METHOD FOR COMPUTING HOLOGRAMS FOR HOLOGRAPHIC RECONSTRUCTION OF TWO-DIMENSIONAL AND/OR THREE-DIMENSIONAL SCENES
    32.
    发明申请
    METHOD FOR COMPUTING HOLOGRAMS FOR HOLOGRAPHIC RECONSTRUCTION OF TWO-DIMENSIONAL AND/OR THREE-DIMENSIONAL SCENES 审中-公开

    公开(公告)号：US20180364643A1

    公开(公告)日：2018-12-20

    申请号：US15563016

    申请日：2016-03-29

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Bo KROLL ,  Norbert LEISTER

    IPC: G03H1/26

    Abstract: The invention relates to methods for computing holograms for holographic reconstruction of two-dimensional and/or three-dimensional scenes in a display apparatus, wherein a scene for reconstruction is broken down into object points and the object points are encoded as sub-holograms into at least one spatial light modulation device of the display apparatus. A reconstructed scene is viewed from a region of visibility. At least one virtual plane of the at least one spatial light modulation device is stipulated on the basis of a real plane of the spatial light modulation device. A computation of sub-holograms is performed in the at least one virtual plane of the at least one spatial light modulation device.

    OPTICAL LIQUID-CRYSTAL PHASE MODULATOR
    34.
    发明申请
    OPTICAL LIQUID-CRYSTAL PHASE MODULATOR 审中-公开

    公开(公告)号：US20170269436A1

    公开(公告)日：2017-09-21

    申请号：US15615372

    申请日：2017-06-06

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert LEISTER

    IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/139 ,  G02F1/29 ,  G02F1/137

    CPC classification number: G02F1/133723 ,  G02F1/133784 ,  G02F1/133788 ,  G02F1/134309 ,  G02F1/134363 ,  G02F1/1393 ,  G02F1/292 ,  G02F2001/133746 ,  G02F2001/13706 ,  G02F2203/50

    Abstract: A phase modulator for polarized light, comprising a first substrate with a first surface and a second substrate with a second surface, a liquid crystal layer between the two substrates and an electrode arrangement. The phase modulator is usable as a variable deflection grating, and liquid crystal materials which are currently conventional are usable for its production. A phase modulator has an out-of-plane angle of the liquid crystal molecules next to the two surfaces whose magnitude is greater than 0 but less than or equal to 45 degrees, and an electrode arrangement controllable such that an in-plane component of the liquid crystal molecule orientation is adjustable in an angle range of up to 180 degrees, and the rotation sense of the liquid crystal molecules next to the first surface is opposite to the rotation sense of the liquid crystal molecules next to the second surface.

    Optical liquid-crystal phase modulator
    36.
    发明授权
    Optical liquid-crystal phase modulator 有权

    公开(公告)号：US09671649B2

    公开(公告)日：2017-06-06

    申请号：US14770885

    申请日：2014-02-26

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert Leister

    IPC: G02F1/1343 ,  G02F1/1337 ,  G02F1/139 ,  G02F1/29 ,  G02F1/137

    CPC classification number: G02F1/133723 ,  G02F1/133784 ,  G02F1/133788 ,  G02F1/134309 ,  G02F1/134363 ,  G02F1/1393 ,  G02F1/292 ,  G02F2001/133746 ,  G02F2001/13706 ,  G02F2203/50

    Abstract: A phase modulator for polarized light, comprising a first substrate with a first surface and a second substrate with a second surface, a liquid crystal layer between the two substrates and an electrode arrangement. The phase modulator is usable as a variable deflection grating, and liquid crystal materials which are currently conventional are usable for its production. A phase modulator has an out-of-plane angle of the liquid crystal molecules next to the two surfaces whose magnitude is greater than 0 but less than or equal to 45 degrees, and an electrode arrangement controllable such that an in-plane component of the liquid crystal molecule orientation is adjustable in an angle range of up to 180 degrees, and the rotation sense of the liquid crystal molecules next to the first surface is opposite to the rotation sense of the liquid crystal molecules next to the second surface.

    METHOD FOR ENCODING A HOLOGRAM IN A LIGHT MODULATION DEVICE
    37.
    发明申请
    METHOD FOR ENCODING A HOLOGRAM IN A LIGHT MODULATION DEVICE 审中-公开

    公开(公告)号：US20170153601A1

    公开(公告)日：2017-06-01

    申请号：US15429759

    申请日：2017-02-10

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert LEISTER

    IPC: G03H1/08 ,  G03H1/22 ,  G02B27/42 ,  G03H1/26

    Abstract: A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device

    Analytic method for computing video holograms in real time
    38.
    发明授权
    Analytic method for computing video holograms in real time 有权
    实时计算视频全息图的分析方法

    公开(公告)号：US09581965B2

    公开(公告)日：2017-02-28

    申请号：US14803344

    申请日：2015-07-20

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Alexander Schwerdtner

    IPC: H04N5/89 ,  G03H1/08 ,  G02B27/00 ,  G03H1/22

    CPC classification number: G03H1/08 ,  G02B27/0093 ,  G03H1/0808 ,  G03H1/0841 ,  G03H1/22 ,  G03H1/2294 ,  G03H1/28 ,  G03H2001/0833 ,  G03H2210/452 ,  G03H2225/33 ,  G03H2226/02

    Abstract: An analytical method for computing a video hologram for a holographic reproduction device having at least one light modulation means is disclosed, wherein a scene split into object points is encoded as a whole hologram and can be seen as a reconstruction from a visibility region, located within a periodicity interval of the reconstruction. The visibility region, together with each object point of the scene to be reconstructed, defines a sub-hologram and the whole hologram is generated from a superposition of sub-holograms, wherein the complex hologram values of a sub-hologram are determined from the wave front of the respective object point to be reconstructed in a modulator region of the light modulation means, by calculating and evaluating the transmission or modulation functions of an imaging element formed in the modulator region. The object point to be reconstructed is located in the focal point of the imaging element.

    Abstract translation: 公开了一种用于计算具有至少一个光调制装置的全息再现装置的视频全息图的分析方法，其中分割为对象点的场景被编码为整个全息图，并且可以被看作是位于内部的可视区域的重建 重建的周期性间隔。 可视区域与要重建的场景的每个对象点一起定义了一个子全息图，并且从副全息图的叠加产生了全息图，其中从全波图的复数全息图值被确定 通过计算和评估在调制器区域中形成的成像元件的传输或调制功能，在光调制装置的调制器区域中重构的各个物体点的前方。 要重建的对象点位于成像元件的焦点处。

    Method for encoding a hologram in a light modulation device
    39.
    发明授权
    Method for encoding a hologram in a light modulation device 有权
    光调制装置中的全息图的编码方法

    公开(公告)号：US09581963B2

    公开(公告)日：2017-02-28

    申请号：US14361739

    申请日：2012-11-29

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert Leister

    IPC: G03H1/08 ,  G03H1/22 ,  G02B27/42

    CPC classification number: G03H1/0841 ,  G02B27/4205 ,  G02B27/4266 ,  G02B27/4272 ,  G03H1/0808 ,  G03H1/2205 ,  G03H1/2294 ,  G03H1/26 ,  G03H2001/0816 ,  G03H2001/0825 ,  G03H2223/23 ,  G03H2225/33 ,  G03H2226/02

    Abstract: A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.

    Abstract translation: 全息图由分配给光调制装置中的相应编码区域的各个子图表构成，并分别分配给要用全息图重建的对象物体点。 通过虚拟观察者窗口，提供了定义的观察区域，观察者观察重构空间中的重建场景。 在虚拟观察窗中计算每个单独对象点的波阵面的复值。 随后将虚拟观察窗中的波阵面的复数值的每个单独振幅乘以校正值，利用该修正值对光调制装置的光束路径中布置在下游的至少一个体积光栅的角度选择性进行校正 。 以这种方式为所有对象点确定的校正后的复数值被求和并变换成光调制装置的全息图平面。

    PHASE MODULATOR FOR THE MODULATION OF LIGHT WHICH INTERACTS WITH THE PHASE MODULATOR
    40.
    发明申请
    PHASE MODULATOR FOR THE MODULATION OF LIGHT WHICH INTERACTS WITH THE PHASE MODULATOR 有权
    用于调制与相位调制器相互作用的光的相位调制器

    公开(公告)号：US20150022745A1

    公开(公告)日：2015-01-22

    申请号：US14488353

    申请日：2014-09-17

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Bo KROLL ,  Norbert LEISTER

    IPC: G02F1/1343 ,  G02F1/1335 ,  G02F1/1337 ,  G02B27/22

    CPC classification number: G02F1/134363 ,  G02B27/22 ,  G02F1/133528 ,  G02F1/1337 ,  G02F1/1393 ,  G02F1/292 ,  G02F2001/133541

    Abstract: A phase modulator for the modulation of the phase of circular polarised light which interacts with the phase modulator. The phase modulator has a first and a second substrate, an electrode arrangement and a liquid crystal layer with liquid crystal molecules. The first substrate is disposed adjacent to the second substrate. The liquid crystal layer is disposed between the two substrates. The first substrate has a first surface, and the second substrate has a second surface. The liquid crystal molecules situated next to the first surface are oriented substantially parallel to the first surface. The liquid crystal molecules situated next to the second surface are oriented substantially perpendicular to the second surface. An in-plane component of the liquid crystal molecule orientation can be set within an angular range of about 180°, e.g. between −90° and +90° related to a specifiable central orientation.

    Abstract translation: 用于调制与相位调制器相互作用的圆偏振光相位的相位调制器。 相位调制器具有第一和第二基板，电极布置和具有液晶分子的液晶层。 第一衬底被布置成与第二衬底相邻。 液晶层设置在两个基板之间。 第一基板具有第一表面，第二基板具有第二表面。 位于第一表面附近的液晶分子被取向为基本上平行于第一表面。 位于第二表面附近的液晶分子取向为基本上垂直于第二表面。 液晶分子取向的面内分量可以设定在约180°的角度范围内，例如， 在-90°和+ 90°之间，与可指定的中心方向有关。

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