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    Polarization gratings for oblique incidence angles
    2.
    发明授权
    Polarization gratings for oblique incidence angles 有权

    公开(公告)号：US10578946B2

    公开(公告)日：2020-03-03

    申请号：US14417179

    申请日：2013-07-26

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert Leister

    IPC: G02F1/29 ,  G02B26/08 ,  G02B5/30 ,  G02B5/18

    Abstract: A polarization grating for diffractive light deflection, having at least one liquid crystal layer on a substrate, wherein the liquid crystal molecules having a periodic change in orientation. The invention further relates to a light deflection device and a method for deflecting light. A polarization grating for an oblique incidence angle of the light is specified, in particular having high diffraction efficiency for the +1st order for a specifiable or variable incidence angle in a wide range of incidence angles. A polarization grating has at least one additional orientation change of the liquid crystal molecules such a way such that light of a specified polarization has a controllable angle of incidence and experiences a specifiable phase retardation upon passing through the liquid crystal layer.

    Phase modulator for the modulation of light which interacts with the phase modulator
    4.
    发明授权
    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：US09442332B2

    公开(公告)日：2016-09-13

    申请号：US14488353

    申请日：2014-09-17

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Bo Kroll ,  Norbert Leister

    IPC: G02F1/1335 ,  G02F1/1343 ,  G02F1/139 ,  G02F1/29 ,  G02B27/22 ,  G02F1/1337

    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。

    DISPLAY DEVICE AND METHOD FOR REPRESENTING A THREE-DIMENSIONAL SCENE
    5.
    发明申请
    DISPLAY DEVICE AND METHOD FOR REPRESENTING A THREE-DIMENSIONAL SCENE 审中-公开
    显示装置和表示三维场景的方法

    公开(公告)号：US20140300709A1

    公开(公告)日：2014-10-09

    申请号：US14352713

    申请日：2012-10-19

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Gerald Futterer ,  Ralf Haussler ,  Norbert Leister

    IPC: H04N13/04

    CPC classification number: H04N13/305 ,  G02B27/2214 ,  G03H1/2205 ,  G03H1/2286 ,  G03H1/2294 ,  G03H2001/2239 ,  G03H2223/18 ,  G03H2225/55 ,  H04N13/32 ,  H04N13/322 ,  H04N13/376

    Abstract: The invention relates to a display device for representing a three-dimensional scene, comprising a light source array, a lenticular system and a data display in this order, but not necessarily immediately following one another, and a corresponding method for representing a three-dimensional scene. The object thereof is to enlarge the observer region of a 3D display in such a way that this simultaneously provides a plurality of observers with the option of perceiving the 3D scene on the 3D display. This is achieved by an aforementioned display device with a multiplexing element, which follows the data display and can be used to distribute light incident from the data display into a plurality of angle segments, and by an aforementioned method, in which, in an additional step, a multiplexing element distributes the light coming from the data display in a plurality of angle segments.

    Abstract translation: 本发明涉及一种用于表示三维场景的显示装置，其包括光源阵列，透镜系统和数据显示器，但不一定紧随其后，以及用于表示三维场景的相应方法 现场。 其目的是以这样一种方式来放大3D显示器的观察者区域，即同时向多个观察者提供感知3D显示器上的3D场景的选项。 这是通过具有复用元件的上述显示装置来实现的，该多路复用元件在数据显示之后，可以用于将从数据显示器入射的光分布成多个角度段，并且通过上述方法，在附加步骤 复用元件将来自数据显示器的光分配在多个角度段中。

    Method for computing holograms for holographic reconstruction of two-dimensional and/or three-dimensional scenes
    6.
    发明授权
    Method for computing holograms for holographic reconstruction of two-dimensional and/or three-dimensional scenes 有权

    公开(公告)号：US11460809B2

    公开(公告)日：2022-10-04

    申请号：US15563016

    申请日：2016-03-29

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Bo Kroll ,  Norbert Leister

    IPC: G03H1/26 ,  G03H1/08

    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.

    Method for encoding a hologram in a light modulation device
    7.
    发明授权
    Method for encoding a hologram in a light modulation device 有权

    公开(公告)号：US10585394B2

    公开(公告)日：2020-03-10

    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.

    Optical liquid-crystal phase modulator
    9.
    发明授权
    Optical liquid-crystal phase modulator 有权

    公开(公告)号：US10268080B2

    公开(公告)日：2019-04-23

    申请号：US15615372

    申请日：2017-06-06

    Applicant: SEEREAL TECHNOLOGIES S.A.

    Inventor： Norbert Leister

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

    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.

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