Patents by Inventor Ralf Haussler
Ralf Haussler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20180088528Abstract: A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.Type: ApplicationFiled: August 17, 2017Publication date: March 29, 2018Inventors: Norbert LEISTER, Ralf HAUSSLER, Armin SCHWERDTNER
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Publication number: 20170357098Abstract: 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.Type: ApplicationFiled: August 28, 2017Publication date: December 14, 2017Inventors: Bo KROLL, Gerald FUTTERER, Norbert LEISTER, Stephan REICHELT, Ralf HAUSSLER
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Patent number: 9810948Abstract: The present invention relates to a controllable diffraction device for a light modulator device. The controllable diffraction device comprises at least two substrates, at least one electrode on each of said substrates facing each other, and liquid crystals forming at least one liquid crystal layer arranged between said electrodes on said substrates. The orientation of the liquid crystals is controllable by a voltage supplied to the electrodes. The liquid crystal layer is provided on at least one alignment layer arranged on at least one electrode on said substrates. The liquid crystals close to the alignment layer are pre-oriented by at least one pre-tilt angle relative to the alignment layer such that the resulting light diffraction in opposite spatial directions is approximately equal.Type: GrantFiled: September 5, 2012Date of Patent: November 7, 2017Assignees: SHARP KABUSHIKI KAISHA, SEEREAL TECHNOLOGIES S.A.Inventors: Naru Usukura, Hiromi Katoh, Yuichi Kanbayashi, Norbert Leister, Ralf Haussler
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Patent number: 9746684Abstract: 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.Type: GrantFiled: March 21, 2016Date of Patent: August 29, 2017Assignee: SEEREAL TECHNOLOGIES S.A.Inventors: Bo Kroll, Gerald Futterer, Norbert Leister, Stephan Reichelt, Ralf Haussler
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Patent number: 9740167Abstract: A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.Type: GrantFiled: July 14, 2014Date of Patent: August 22, 2017Assignee: SEEREAL TECHNOLOGIES GMBHInventors: Norbert Leister, Ralf Haussler, Armin Schwerdtner
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Publication number: 20160202593Abstract: 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.Type: ApplicationFiled: March 21, 2016Publication date: July 14, 2016Inventors: Bo KROLL, Gerald FUTTERER, Norbert LEISTER, Stephan REICHELT, Ralf HAUSSLER
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Patent number: 9291828Abstract: 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.Type: GrantFiled: December 21, 2011Date of Patent: March 22, 2016Assignee: SEEREAL TECHNOLOGIES S.A.Inventors: Bo Kroll, Gerald Futterer, Norbert Leister, Stephan Reichelt, Ralf Haussler
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Publication number: 20150293409Abstract: The present invention relates to a controllable diffraction device for a light modulator device. The controllable diffraction device comprises at least two substrates, at least one electrode on each of said substrates facing each other, and liquid crystals forming at least one liquid crystal layer arranged between said electrodes on said substrates. The orientation of the liquid crystals is controllable by a voltage supplied to the electrodes. The liquid crystal layer is provided on at least one alignment layer arranged on at least one electrode on said substrates. The liquid crystals close to the alignment layer are pre-oriented by at least one pre-tilt angle relative to the alignment layer such that the resulting light diffraction in opposite spatial directions is approximately equal.Type: ApplicationFiled: September 5, 2012Publication date: October 15, 2015Inventors: Naru Usukura, Hiromi Katoh, Yuichi Kanbayashi, Norbert Leister, Ralf Haussler
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Publication number: 20150279293Abstract: 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.Type: ApplicationFiled: October 1, 2012Publication date: October 1, 2015Applicants: SEEREAL TECHNOLOGIES S.A., SHARP CORPORATIONInventors: Robert Missbach, Stephan Reichelt, Norbert Leister, Ralf Haussler, Naru Usukura, Hiromi Katoh, Yuichi Kanbayashi
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Patent number: 9046734Abstract: A display comprising an observer window, which in 3D and/or 2D representation mode of a 3D scene can be adapted to changing eye positions. Several observers can use the display simultaneously. The display includes a light modulation device having an actuatable diffraction unit and a controllable spatial light modulator, in which a 3D scene is coded in an actuatable manner, and a control unit. An observer window can be generated using coherent light beams on alternating eye positions. The diffraction unit includes at least electrodes and a controllable material into which a prism and/or lens function and/or scatter function can be written as a diffraction grating with a phase progression in an at least one-dimensionally controllable manner.Type: GrantFiled: December 9, 2011Date of Patent: June 2, 2015Assignee: SEEREAL TECHNOLOGIES S.A.Inventor: Ralf Haussler
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Patent number: 8958137Abstract: A holographic display including light sources (LS1, LS2, . . . ) in a 2D light source array, lenses (L1, L2, . . . ) in a 2D lens array, a spatial light modulator (SLM) and a beamsplitter, in which there are m light sources per lens, and the light sources are in m-to-one correspondence with the lenses. The beamsplitter splits the rays leaving the SLM into two bundles, one of which illuminates the virtual observer windows for m left eyes and the other illuminates the virtual observer windows for m right eyes. In one example, m=1. An advantage is 2D-encoding with vertical and horizontal focusing and vertical and horizontal motion parallax.Type: GrantFiled: October 26, 2007Date of Patent: February 17, 2015Assignee: Seereal Technologies S.A.Inventor: Ralf Haussler
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Publication number: 20150036199Abstract: A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.Type: ApplicationFiled: July 14, 2014Publication date: February 5, 2015Inventors: Norbert LEISTER, Ralf HAUSSLER, Armin SCHWERDTNER
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Patent number: 8917431Abstract: A color filter with parallel, vertical color strips of the RGB base colors associated with the image separating element, the color strips repeating horizontally within the color filter in periodic fashion. The light modulator contains a sequence of two registered holograms for each base color interlaced into six pixel columns for a left observer eye and for a right observer eye, and the sequence is repeated horizontally in periodic fashion. The periods of the color filter and the hologram are arranged relative to one another with the same degree of expansion, with a color strip and at least two pixel columns with holograms of the base color of the color strip are associated with a separating element.Type: GrantFiled: November 10, 2009Date of Patent: December 23, 2014Assignee: Seereal Technologies S.A.Inventor: Ralf Haussler
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Publication number: 20140300709Abstract: 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.Type: ApplicationFiled: October 19, 2012Publication date: October 9, 2014Inventors: Gerald Futterer, Ralf Haussler, Norbert Leister
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Patent number: 8804220Abstract: A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.Type: GrantFiled: December 21, 2005Date of Patent: August 12, 2014Assignee: SeeReal Technologies GmbHInventors: Norbert Leister, Ralf Häussler, Armin Schwerdtner
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Patent number: 8711466Abstract: The present invention relates to a lighting device having a planer optical fiber and at least one light source device for illuminating a controllable spatial light modulator, wherein the optical fiber comprises a light-conducting core and a cover coating, and the light modulator comprises a pixel matrix, the light source device is disposed on the side of the optical fiber, and the light emitted by at least one light source of the light source device propagates laminarly in the optical fiber. The lighting unit according to the invention is characterized in that the planar optical fiber comprises a deflecting coating having a selective polarization function for laminarly decoupling and deflecting the evanescent wave field of the light propagating in the optical fiber, wherein the thickness of the cover coating reduces in the direction of light propagation.Type: GrantFiled: June 18, 2010Date of Patent: April 29, 2014Assignee: Seereal Technologies S.A.Inventors: Bo Kroll, Gerald Futterer, Ralf Haussler, Norbert Leister, Steffen Buschbeck
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Patent number: 8687252Abstract: In known light modulation means, complex phase and amplitude values for modulating light waves are implemented and modulated either separately by two different light modulation means or a light modulation means having two layers of double-refracting materials, leading to increased expenses for material and adjustment. A new device is disclosed that simplifies the modulation of light waves in phase and amplitude in a single light modulation means made of double-refracting material. In a device having regularly disposed, controllable light-modulated elements having a double-refracting material for complex modulation of coherent light waves, and a modulation controller controlling the force-induced alignment of the optical axes of the molecules of the double-refracting material, means are provided for independently aligning the optical axes of the molecules in the light-modulating elements in two dimensions. The alignment can take place by electrical, magnetic, or optical acting means.Type: GrantFiled: June 5, 2008Date of Patent: April 1, 2014Assignee: Seereal Technologies S.A.Inventors: Norbert Leister, Ralf Haussler, Steffen Buschbeck
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Publication number: 20130321899Abstract: A display comprising an observer window, which in 3D and/or 2D representation mode of a 3D scene can be adapted to changing eye positions. Several observers can use the display simultaneously. The display includes a light modulation device having an actuatable diffraction unit and a controllable spatial light modulator, in which a 3D scene is coded in an actuatable manner, and a control unit. An observer window can be generated using coherent light beams on alternating eye positions. The diffraction unit includes at least electrodes and a controllable material into which a prism and/or lens function and/or scatter function can be written as a diffraction grating with a phase progression in an at least one-dimensionally controllable manner.Type: ApplicationFiled: December 9, 2011Publication date: December 5, 2013Applicant: SEEREAL TECHNOLOGIES S.A.Inventor: Ralf Haussler
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Patent number: 8526088Abstract: A device for holographic reconstruction of three-dimensional scenes includes optical focusing means which directs sufficiently coherent light from light means to the eyes of at least one observer via a spatial light modulator that is encoded with holographic information. The device has a plurality of illumination units for illuminating the surface of the spatial light modulator; each unit comprises a focusing element, and a light means that emits sufficiently coherent light such that each of these illumination units illuminates one separate illuminated region of the surface, whereby the focusing element and the light means are arranged such that the light emitted by the light means coincides close to or at the observer eyes.Type: GrantFiled: May 18, 2009Date of Patent: September 3, 2013Assignee: Seereal Technologies GmbHInventors: Armin Schwerdtner, Ralf Haussler, Norbert Leister
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Patent number: 8416276Abstract: A mobile telephony system comprising a calling party mobile telephone with an imaging system and a display. The imaging system is operable to capture an image of the calling party. The calling party mobile telephone sends an image of the calling party to a called party mobile telephone over a wireless link, and the called party mobile telephone locally generates a holographic reconstruction of the calling party using a holographic display that is encoded with a hologram. An advantage is that a mobile telephone call may be held in which one party views a holographic reconstruction of the other party.Type: GrantFiled: October 26, 2007Date of Patent: April 9, 2013Assignee: Seereal Technologies S.A.Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner