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.

公开(公告)号：US20190310585A1

公开(公告)日：2019-10-10

申请号：US16451437

申请日：2019-06-25

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Enrico ZSCHAU

IPC: G03H1/08 ,  G03H1/22

Abstract: An apparatus and a method for optimized calculation of 2D sub-holograms for object points of a three-dimensional scene and a pipeline for real-time calculation of holograms are provided. The invention shortens the calculation time of a hologram for representing a three-dimensional scene and/or to reduce the calculation complexity of such a hologram. This is achieved by a 2D sub-hologram of an object point, which has image elements of the spatial light modulator, comprises a half 1D sub-hologram, where the radius of each image element is determined and each image element of the 2D sub-hologram is fixedly assigned to at least one image element of the half 1D sub-hologram with identical or similar radius by way of an electronic circuit, by a method for encoding a hologram, and by a pipeline on the basis of FPGA and/or ASIC.

公开(公告)号：US20190094803A1

公开(公告)日：2019-03-28

申请号：US16080728

申请日：2017-03-02

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Gerald FUTTERER

IPC: G03H1/22 ,  G02B27/09 ,  G02B5/02 ,  G03H1/04

Abstract: The invention refers to an Illumination device for illuminating a spatial light modulator device. Sub-holograms are used for encoding a hologram into the spatial light modulator device. The Illumination device comprises at least one light source for emitting light for illuminating the spatial light modulator device and a beam shaping unit. The beam shaping unit provides a flat-top plateau-type distribution of an absolute value of a complex degree of mutual coherence of the light in a plane of the spatial light modulator device to be illuminated. The flat-top plateau-type distribution of the absolute value of the complex degree of mutual coherence has a shape that is at least similar to a shape of the largest sub-hologram used for encoding of object points into the spatial light modulator device.

公开(公告)号：US20190086598A1

公开(公告)日：2019-03-21

申请号：US16085365

申请日：2017-03-16

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Gerald FUTTERER

IPC: G02B5/32 ,  G06F3/01 ,  F21V8/00 ,  G02F1/1335 ,  G02B27/01

CPC classification number: G02B5/32 ,  G02B6/0031 ,  G02B6/0035 ,  G02B6/0063 ,  G02B6/0068 ,  G02B27/0101 ,  G02B27/0103 ,  G02B27/0172 ,  G02B27/48 ,  G02B2027/0107 ,  G02B2027/0125 ,  G02B2027/0174 ,  G02F1/133615 ,  G02F1/133621 ,  G06F3/013

Abstract: The invention refers to an apparatus for generating two-dimensional and/or three-dimensional objects. The apparatus comprises at least one spatial light modulator device for modulating incident light and an optical system. The optical system is designed and arranged such that a segmentation of wave fields is provided in a plane, where the plane in which the segmentation of the wave fields is provided differs with a plane that comprises object points. Adjacent segmented wave fields do have a mutual overlap. The apparatus also comprises a scanning device which couples light waves into a beam expanding waveguide with outcoupling gratings.

公开(公告)号：US20180299829A1

公开(公告)日：2018-10-18

申请号：US15547269

申请日：2016-01-20

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Ralf HAUSSLER

IPC: G03H1/22 ,  G03H1/02 ,  G02F1/1335

CPC classification number: G03H1/2294 ,  G02B5/021 ,  G02B5/0252 ,  G02B5/32 ,  G02F1/133504 ,  G02F2201/50 ,  G02F2203/12 ,  G02F2203/28 ,  G02F2203/50 ,  G03H1/02 ,  G03H1/2205 ,  G03H2001/0224 ,  G03H2001/2236 ,  G03H2222/12 ,  G03H2223/13 ,  G03H2223/14 ,  G03H2223/20 ,  G03H2225/55 ,  H04N9/3161

Abstract: The invention relates to a light modulation device for a display device, in particular a holographic display device, for the representation of two-dimensional and/or three-dimensional reconstructed scenes. The light modulation device comprises at least one spatial light modulator comprising modulation elements for modulating incident light and an optical element of known optical characteristics. The light incident on the at least one spatial light modulator is sufficiently coherent. The at least one spatial light modulator and the optical element are combined with one another in such a way that the optical element scatters the unmodulated light emanating from the spatial light modulator into an angular range.

公开(公告)号：US10102814B2

公开(公告)日：2018-10-16

申请号：US14430259

申请日：2012-10-01

Applicant: SEEREAL TECHNOLOGIES S.A. ,  SHARP CORPORATION

Inventor： Robert Missbach ,  Stephan Reichelt ,  Norbert Leister ,  Ralf Haussler ,  Naru Usukura ,  Hiromi Katoh ,  Yuichi Kanbayashi

IPC: G09G3/36 ,  G09G3/00 ,  G03H1/22

Abstract: A controllable device for phase modulation of coherent light comprises a modulator matrix having a plurality of liquid crystal modulator cells each being adapted to modulate a phase value of light passing through a liquid crystal modulator cell depending on a voltage, which is applied to the liquid crystal modulator cell; at least one polarity area of said modulator matrix including at least one liquid crystal modulator cell; at least one storage unit for storing at least one pair of voltage values of which one has a positive and the other has a negative polarity for the liquid crystal modulator cells, whereby the pair of voltage values corresponds to a predetermined phase value; and a control unit for selectively applying one pair of voltage values to one liquid crystal modulator cell.

公开(公告)号：US09946224B2

公开(公告)日：2018-04-17

申请号：US15148142

申请日：2016-05-06

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Bo Kroll ,  Robert Missbach ,  Alexander Schwerdtner

IPC: G03H1/00 ,  G03H1/02 ,  G03H1/08 ,  G03H1/26 ,  G03H1/22 ,  G02B26/08 ,  G06F3/01 ,  G03H1/04 ,  G09G3/20 ,  G03H1/32

CPC classification number: G03H1/0443 ,  G02B26/0875 ,  G03H1/0005 ,  G03H1/02 ,  G03H1/08 ,  G03H1/0808 ,  G03H1/2205 ,  G03H1/2294 ,  G03H1/268 ,  G03H1/32 ,  G03H2001/0088 ,  G03H2001/0216 ,  G03H2001/0224 ,  G03H2001/0833 ,  G03H2001/2242 ,  G03H2001/2271 ,  G03H2001/2625 ,  G03H2210/30 ,  G03H2210/36 ,  G03H2210/44 ,  G03H2222/20 ,  G03H2222/22 ,  G03H2222/24 ,  G03H2223/18 ,  G03H2223/19 ,  G03H2225/22 ,  G03H2225/55 ,  G03H2226/02 ,  G03H2226/04 ,  G03H2226/05 ,  G06F3/013 ,  G09G3/20 ,  G09G2300/026 ,  G09G2300/0408 ,  G09G2300/0809

Abstract: Disclosed is a holographic display including a spatial light modulator (SLM) with pixels, the SLM pixels being on a substrate, the SLM including circuitry which is on the same substrate as the SLM pixels, the circuitry operable to perform calculations which provide an encoding of the SLM.

公开(公告)号：US09829860B2

公开(公告)日：2017-11-28

申请号：US15429465

申请日：2017-02-10

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Alexander Schwerdtner

IPC: G03H1/08 ,  G03H1/28 ,  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: A holographic display device for computing a video hologram of a scene is disclosed. The scene comprises a multitude of object points. The holographic display device comprises at least one light modulator means. Said holographic display device is configured to perform the steps of (a) defining a visibility region within a periodicity interval of the video hologram of the scene to be reconstructed; (b) for each object point, defining a modulator region by the defined visibility region together with each object point of the scene to be reconstructed, where a sub-hologram of an object point of the scene to be reconstructed is computed for each modulator region, and where an entire video hologram is created by superposition of said sub-holograms; (c) determining complex hologram values of a sub-hologram in a modulator region from a wave front of an object point to be reconstructed by computing modulation functions of an imaging element which is modeled in the respective modulator region of said holographic display device, and in whose focal point the object point to be reconstructed lies, where the sub-hologram of said object point is computed using the modulation functions, and (d) encoding the video hologram of the scene into the screen means.

公开(公告)号：US20170153600A1

公开(公告)日：2017-06-01

申请号：US15429465

申请日：2017-02-10

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Alexander SCHWERDTNER

IPC: G03H1/08 ,  G03H1/22 ,  G03H1/28

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: A holographic display device for computing a video hologram of a scene is disclosed. The scene comprises a multitude of object points. The holographic display device comprises at least one light modulator means. Said holographic display device is configured to perform the steps of (a) defining a visibility region within a periodicity interval of the video hologram of the scene to be reconstructed; (b) for each object point, defining a modulator region by the defined visibility region together with each object point of the scene to be reconstructed, where a sub-hologram of an object point of the scene to be reconstructed is computed for each modulator region, and where an entire video hologram is created by superposition of said sub-holograms; (c) determining complex hologram values of a sub-hologram in a modulator region from a wave front of an object point to be reconstructed by computing modulation functions of an imaging element which is modeled in the respective modulator region of said holographic display device, and in whose focal point the object point to be reconstructed lies, where the sub-hologram of said object point is computed using the modulation functions, and (d) encoding the video hologram of the scene into the screen means.

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。