Patents by Inventor Norbert Leister

Norbert Leister 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).

  • Publication number: 20210011300
    Abstract: The invention relates to a display device for representing three-dimensional scenes. The display device comprises at least one illumination device, at least one spatial light modulation device and at least one Bragg polarization grating. The Bragg polarization grating comprises at least one birefringent layer, incident light being deflectable at a deflection angle of at least 20°.
    Type: Application
    Filed: March 25, 2019
    Publication date: January 14, 2021
    Inventors: Norbert LEISTER, Hagen SAHM, Yuri GRITSAI
  • Patent number: 10871674
    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.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 22, 2020
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventors: Norbert Leister, Stephan Reichelt
  • Publication number: 20200379272
    Abstract: 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.
    Type: Application
    Filed: June 15, 2020
    Publication date: December 3, 2020
    Inventors: Bo KROLL, Norbert LEISTER, Gerald FUTTERER, Robert MISSBACH, Stephan REICHELT
  • Publication number: 20200333609
    Abstract: The invention relates to a display device for representing two-dimensional and/or three-dimensional scenes. The display device comprises at least one illumination device to emit sufficiently coherent light, at least one spatial light modulation device, at least one optical system and a tracking device. A hologram is encoded into the at least one spatial light modulation device by means of a single-parallax encoding. The at least one optical system is provided to generate at least one virtual visibility region at the position of an eye of an observer. The encoding direction of the hologram on the spatial light modulation device is modifiable by means of the tracking device.
    Type: Application
    Filed: December 21, 2018
    Publication date: October 22, 2020
    Inventors: Norbert LEISTER, Bo KROLL
  • Patent number: 10684489
    Abstract: 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.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: June 16, 2020
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventors: Bo Kroll, Norbert Leister, Gerald Futterer, Robert Missbach, Stephan Reichelt
  • Publication number: 20200183079
    Abstract: The invention relates to a display device, in particular a provided near-to-eye display device of a user. The display device comprises at least one illumination device, at least one spatial light modulator device, at least one imaging element, at least one light guide, and at least two partially-reflective decoupling elements. The at least one illumination device is used for emitting sufficiently coherent light. The at least one imaging element is provided for imaging light originating from the at least one light modulator device. The at least two partially-reflective decoupling elements, which are provided in the at least one light guide, are used for coupling the light out of the light guide.
    Type: Application
    Filed: May 18, 2018
    Publication date: June 11, 2020
    Inventor: Norbert LEISTER
  • Publication number: 20200166754
    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.
    Type: Application
    Filed: July 12, 2018
    Publication date: May 28, 2020
    Inventors: Norbert LEISTER, Bo KROLL, Gerald FUTTERER
  • Patent number: 10585394
    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.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: March 10, 2020
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventor: Norbert Leister
  • Patent number: 10578946
    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.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: March 3, 2020
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventor: Norbert Leister
  • Publication number: 20200033672
    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.
    Type: Application
    Filed: September 29, 2017
    Publication date: January 30, 2020
    Inventors: Norbert LEISTER, Stephan REICHELT
  • Patent number: 10509364
    Abstract: A light modulator, for a display for the presentation of two- and/or three-dimensional image contents or image sequences, includes two opposing substrates and electrodes. At least one liquid crystal layer is provided between the two substrates. An alignment means is provided on the substrate which faces the liquid crystal layer to set a predeterminable initial alignment of the liquid crystals. The orientation of the liquid crystals can be controlled in a given range through an electric field generated by the electrodes. The alignment means is controllable and can be controlled to modify the initial alignment of the liquid crystals. The alignment can be controlled such the orientation of the liquid crystals can be oriented outside the given range or so that the initial alignment of the liquid crystals can be set specifically for certain positions.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: December 17, 2019
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventors: Bo Kroll, Norbert Leister, Stephan Reichelt, Gerald Futterer
  • Publication number: 20190377301
    Abstract: 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: Application
    Filed: August 20, 2019
    Publication date: December 12, 2019
    Inventors: Norbert LEISTER, Ralf HAUSSLER, Armin SCHWERDTNER
  • Publication number: 20190369403
    Abstract: The invention relates to a light guiding device for guiding light. The light guiding device comprises a light guide, a light coupling device, and a light decoupling device. The light propagates within the light guide via a reflection at boundary surfaces of the light guide. The decoupling of the light out of the light guide is provided by means of the light decoupling device after a predetermined number of reflections of the light at boundary surfaces of the light guide. A display device, in particular a near-eye display device is also provided, which comprises an illumination device having at least one light source, at least one spatial light modulation device, an optical system, and a light guiding device.
    Type: Application
    Filed: February 13, 2018
    Publication date: December 5, 2019
    Inventor: Norbert LEISTER
  • Publication number: 20190278225
    Abstract: 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.
    Type: Application
    Filed: March 18, 2019
    Publication date: September 12, 2019
    Inventors: Gerald FUTTERER, Norbert LEISTER, Ralf HAUSSLER, Grigory LAZAREV
  • Patent number: 10401794
    Abstract: 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: Grant
    Filed: August 17, 2017
    Date of Patent: September 3, 2019
    Assignee: SEEREAL TECHNOLOGIES GMBH
    Inventors: Norbert Leister, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20190227492
    Abstract: The invention relates to a display device, in particular a head-mounted display or a head-up display, for representing a two-dimensional and/or three-dimensional scene. The display device comprises a spatial light modulator device having pixels, and a beam offset device. The spatial light modulator device is illuminatable with light. The beam offset device is configured to be controllable in such a way that the light modulated by the pixels of the spatial light modulator device is laterally displaceable by less than one pixel extent.
    Type: Application
    Filed: July 12, 2017
    Publication date: July 25, 2019
    Applicant: SEEREAL TECHNOLOGIES S.A.
    Inventors: Bo KROLL, Norbert LEISTER
  • Patent number: 10359626
    Abstract: The invention relates to a display, in particular an autostereoscopic or holographic display, for representing preferably three-dimensional information, wherein the stereo views or the reconstructions of the holographically encoded objects can be tracked to the movements of the associated eyes of one or more observers in a finely stepped manner within a plurality of zones of the movement region. In this case, the zones are selected by the activation of switchable polarization gratings.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: July 23, 2019
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventor: Norbert Leister
  • Publication number: 20190196402
    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.
    Type: Application
    Filed: August 24, 2017
    Publication date: June 27, 2019
    Inventors: Norbert LEISTER, Ralf HAUSSLER
  • Publication number: 20190121291
    Abstract: The invention relates to a method for generating holograms for encoding in a spatial light modulation device for a holographic display for representing a two- and/or three-dimensional scene. The two- and/or three-dimensional scene is decomposed into object points and encoded in a hologram, which is subdivided into subholograms, in the spatial light modulation device. The object points of the scene are encoded into encoding regions on the spatial light modulation device. A size and/or shape of the encoding region is selected in relation to a size and/or shape of a subhologram, assigned to the encoding region, in such a way that crosstalk of higher diffraction orders in a virtual visibility region is reduced.
    Type: Application
    Filed: May 17, 2017
    Publication date: April 25, 2019
    Inventors: Norbert LEISTER, Ralf HAUSSLER, Gerald FUTTERER
  • Patent number: 10268080
    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.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: April 23, 2019
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventor: Norbert Leister