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1.发明授权公开(公告)号：US11914251B2
公开(公告)日：2024-02-27
申请号：US17711207
申请日：2022-04-01
IPC分类号： G02F1/1343 , G02B30/00 , G02B30/20 , G02F1/1347 , G02F1/29 , G03H1/02 , G03H1/22 , G02F1/1335 , G03H1/26
CPC分类号： G02F1/134309 , G02B30/00 , G02B30/20 , G02F1/1347 , G02F1/292 , G03H1/02 , G03H1/2205 , G03H1/2294 , G02F1/133504 , G02F1/134318 , G02F2203/24 , G03H2001/0224 , G03H2001/2615 , G03H2001/264 , G03H2225/11 , G03H2225/23 , G03H2225/55 , G03H2225/60 , Y10T29/49155
摘要： 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.
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公开(公告)号：US20230259071A1
公开(公告)日：2023-08-17
申请号：US18305343
申请日：2023-04-22
发明人： Enrico ZSCHAU
CPC分类号： G03H1/0841 , G03H1/0808 , G03H1/2294 , G03H2210/30 , G03H2001/2605
摘要： 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.
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3.发明申请公开(公告)号：US20220326654A1
公开(公告)日：2022-10-13
申请号：US17844404
申请日：2022-06-20
摘要： A three-dimensional light modulator, of which the pixels are combined to form modulation elements. Each modulation element can be coded with a preset discrete value such that three-dimensionally arranged object points can be holographically reconstructed. The light modulator is characterized in that assigned to the pixels of the modulator are beam splitters or beam combiners which, for each modulation element, combine the light wave parts modulated by the pixels by means of refraction or diffraction on the output side to form a common light beam which exits the modulation element in a set propagation direction.
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公开(公告)号：US11460808B2
公开(公告)日：2022-10-04
申请号：US16895108
申请日：2020-06-08
摘要： A method for generating video holograms in real time for a holographic playback device comprising at least one light modulator means, into which a scene divided into object points is encoded as an entire hologram and can be seen as a reconstruction from a visibility region, which is located within a periodicity interval of the reconstruction of the video hologram, the visibility region defining a subhologram together with each object point of the scene to be reconstructed, and the entire hologram being generated from a superposition of contributions of subholograms, is characterized in that for each object point the contributions of the subholograms in the entire reconstruction of the scene can be determined from at least one look-up table.
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公开(公告)号：US20220236692A1
公开(公告)日：2022-07-28
申请号：US17717087
申请日：2022-04-10
发明人： Gerald FUTTERER
摘要： 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 includes 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.
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公开(公告)号：US11327305B2
公开(公告)日：2022-05-10
申请号：US16770689
申请日：2018-12-05
发明人： Ralf Haussler
IPC分类号： G02B27/01
摘要： The invention relates to a head-up display device for representing information in a field of view of an observer. The head-up display device comprises at least one projection device, a deflection device which comprises at least one deflection element at which incident light beams are deflected, a sensor device, and a control device. The sensor device is used for detecting data of at least one test beam which is incident on the deflection device. The control device is used for determining at least one aberration caused by the deflection device and for determining at least one correction signal in real time.
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公开(公告)号：US11269295B2
公开(公告)日：2022-03-08
申请号：US17007104
申请日：2020-08-31
发明人： Bo Kroll , Robert Missbach , Alexander Schwerdtner
IPC分类号： G03H1/04 , G02B26/08 , G03H1/02 , G03H1/22 , G03H1/00 , G03H1/08 , G03H1/26 , G09G3/20 , G03H1/32 , G06F3/01
摘要： 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.
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公开(公告)号：US20210318481A1
公开(公告)日：2021-10-14
申请号：US17271080
申请日：2019-08-14
发明人： Ralf HÄUSSLER
摘要： The invention relates to a light guiding device for guiding light. The light guiding device comprises at least one light guide, at least one beam splitter element, and at least one light decoupling device. The at least one light guide comprises at least two layers. The at least one beam splitter element is provided between the at least two layers of the at least one light guide, where the at least one beam splitter element is designed for partially transmitting and reflecting incident light propagating in the at least one light guide. The at least one light decoupling device is provided for coupling incident light out of the at least one light guide. Furthermore, the invention also relates to an illumination device and a display device for displaying two-dimensional and/or three-dimensional information comprising such a light guiding device.
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公开(公告)号：US20210278694A1
公开(公告)日：2021-09-09
申请号：US17315949
申请日：2021-05-10
IPC分类号： G02B30/00 , G02F1/1343 , G02F1/1347 , G02F1/29 , G03H1/02 , G03H1/22
摘要： 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.
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10.发明申请公开(公告)号：US20210109404A1
公开(公告)日：2021-04-15
申请号：US17129059
申请日：2020-12-21
发明人： Norbert LEISTER , Stephan REICHELT
IPC分类号： G02F1/1335 , G02F1/13363 , G03H1/22
摘要： 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.
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