公开(公告)号：US20200166754A1

公开(公告)日：2020-05-28

申请号：US16630648

申请日：2018-07-12

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Norbert LEISTER ,  Bo KROLL ,  Gerald FUTTERER

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/00 ,  F21V8/00

Abstract: A display device for representing two-dimensional and/or three-dimensional objects or scenes, having at least one spatial light modulation device having pixels for modulating light, at least one optical system, and at least one light guiding device. Light beams originating from the individual pixels of the spatial light modulation device are incident on the at least one light guiding device at different angles on average in relation to the surface of the at least one light guiding device and can be coupled therein, whereby a coupling angular spectrum is definable. The light beams propagating in the at least one light guiding device can be coupled out of the at least one light guiding device at different angles on average in relation to an observer region, whereby a decoupling angular spectrum is definable. The decoupling angular spectrum is enlarged in comparison to the coupling angular spectrum.

公开(公告)号：US20200033672A1

公开(公告)日：2020-01-30

申请号：US16337585

申请日：2017-09-29

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Norbert LEISTER ,  Stephan REICHELT

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

Abstract: The present invention relates to a device for combining light beams which interact with adjacently arranged pixels of a light modulator. The present invention furthermore relates to a device for beam combination and to a spatial light modulation device for complex-valued modulation. The invention relates to a device for beam combination, and to an optical arrangement of polarization-sensitive component parts which allows complex-valued modulation of a light field by means of a phase-modulating light modulator and a beam combiner, which is insensitive to changes in the incidence direction of the illumination wave. This document furthermore also relates to various arrangements of reflectively operating light modulators.

公开(公告)号：US20190196402A1

公开(公告)日：2019-06-27

申请号：US16327886

申请日：2017-08-24

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Norbert LEISTER ,  Ralf HAUSSLER

IPC: G03H1/22 ,  G02B27/09 ,  G02B27/58 ,  G02B5/20 ,  G02B5/22 ,  H04N13/366

CPC classification number: G03H1/2205 ,  G02B5/201 ,  G02B5/22 ,  G02B27/0988 ,  G02B27/58 ,  G03H1/2294 ,  G03H2001/0825 ,  G03H2001/2207 ,  G03H2001/2236 ,  G03H2001/2242 ,  G03H2001/2255 ,  G03H2223/12 ,  G03H2223/17 ,  G03H2223/18 ,  G03H2223/53 ,  G03H2226/05 ,  H04N13/366

Abstract: The invention relates to a holographic display device for representing a two-dimensional and/or three-dimensional scene. The holographic display device comprises at least one spatial light modulator device and an optical component. The at least one spatial light modulator device is provided in order to reconstruct the scene and in order to generate at least one virtual visibility region in an observer plane. The optical component is configured with at least two regions that have a different transparency to one another, the value of the transparency respectively lying between 0 and 1. Furthermore, the optical component is arranged in the display device in such a way that it provides filtering, to be carried out at least partially, of a diffraction order spot in at least one diffraction order inside the virtual visibility region.

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.

公开(公告)号：US20170357098A1

公开(公告)日：2017-12-14

申请号：US15687585

申请日：2017-08-28

Applicant: SEEREAL TECHNOLOGIES S.A.

Inventor： Bo KROLL ,  Gerald FUTTERER ,  Norbert LEISTER ,  Stephan REICHELT ,  Ralf HAUSSLER

IPC: G02B27/22 ,  G02B27/00 ,  G03H1/02 ,  H04N13/04 ,  G03H1/22 ,  G02F1/29 ,  G02B26/08 ,  G02B5/32 ,  G03H1/26 ,  G02F1/13

CPC classification number: G02B27/22 ,  G02B5/32 ,  G02B26/08 ,  G02B27/0093 ,  G02B27/2214 ,  G02B27/225 ,  G02F1/1313 ,  G02F1/292 ,  G03H1/02 ,  G03H1/22 ,  G03H1/2205 ,  G03H1/2294 ,  G03H1/2645 ,  G03H1/265 ,  G03H2001/0212 ,  G03H2001/221 ,  G03H2001/2223 ,  G03H2001/2236 ,  G03H2001/2242 ,  G03H2001/2292 ,  G03H2001/2655 ,  G03H2001/266 ,  G03H2222/34 ,  G03H2222/36 ,  G03H2225/33 ,  G03H2226/05 ,  H04N13/305 ,  H04N13/31 ,  H04N13/32 ,  H04N13/322 ,  H04N13/366

Abstract: For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers.

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.

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

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。