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).

  • Patent number: 8049941
    Abstract: To compensate for an inhomogeneous brightness perception in a holographic reconstruction of 3D-scenes (4), a computing means encodes modulator cells of a SLM with a hologram point data pattern. Multiple bundles of rays illuminate the surface of the SLM and an array of focusing elements (21, 23) directs the bundles of rays to an observer's eye positions. Geometrical and optical properties of the array cause dissimilarly affected illumination regions on the SLM surface. The computing means determine parameters which describe the extent of these effects in combination with an expected spatial filtering at the eye pupil of the observer's eyes. Using these parameters, the computing means estimates which local errors of the reconstruction caused by these dissimilarly affected illumination regions will be perceived by the observer when watching the reconstruction, and corrects the hologram point data pattern such that the reconstruction appears at a corrected brightness uniformity level.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: November 1, 2011
    Assignee: SeeReal Technologies S.A.
    Inventor: Ralf Haussler
  • Publication number: 20110216383
    Abstract: Disclosed is a color filter with parallel, vertical color strips of the RGB base colors associated with the image separating means, 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: Application
    Filed: November 10, 2009
    Publication date: September 8, 2011
    Applicant: SEEREAL TECHNOLOGIES S.A.
    Inventor: Ralf Haussler
  • Publication number: 20110149018
    Abstract: A holographic display device comprising at least one magneto-optical spatial light modulator (MOSLM). The holographic display device may comprise a first MOSLM and a second MOSLM, the first and second MOSLMs encoding a hologram and a holographic reconstruction being generated by the device. An advantage of the device is fast encoding of holograms.
    Type: Application
    Filed: October 26, 2007
    Publication date: June 23, 2011
    Applicant: SeeReal Technologies S.A.
    Inventors: Bo Kroll, Norbert Leister, Armin Schwerdtner, Ralf Haussler
  • Publication number: 20100271675
    Abstract: The object of the invention is to improve the quality of encoding a CGH of a three-dimensional object on a light modulator with the help of an iterative method with phase encoding and thus to improve the reconstruction quality. Based on given object data sets, a two-dimensional distribution of N complex values of a wave field in a virtual observer window (2), which is located within a transformation area (1), is calculated. The distribution forms there a distribution of complex set-point values, which serves as a basis for comparison for an iterative calculation of the code.
    Type: Application
    Filed: January 15, 2007
    Publication date: October 28, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Norbert Leister, Ralf Haussler
  • Publication number: 20100265558
    Abstract: An individual, controllable light modulator is configured with a regular pixel structure, for realizing different types of modulation. The spatial light modulator can be realized transmissively and reflectively. The light modulator contains at least one addressable, transmissive layer with a pixel structure and at least one substrate layer with retro-reflecting elements, as well as modulation control means for controlling the modulation of the pixels. The modulation control means produce a number of macropixels from at least two adjacent pixels, to which a selected modulation characteristic is assigned. The retro-reflecting elements are disposed consecutively in such a manner in the substrate layer that, in each case, a retro-reflecting element covers two adjacent pixels of a macropixel of the addressable layer, in order to direct a light bundle, incident in each case on one pixel of a macropixel, sequentially, through further pixels of the macropixel to modulate the incident light bundle.
    Type: Application
    Filed: December 15, 2008
    Publication date: October 21, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Norbert Leister, Ralf Haussler
  • Publication number: 20100214395
    Abstract: The detection of the position of observer eyes in large object planes by a camera system with eye finder modules is disclosed, each of which comprises a camera with an objective lens and a camera chip. An embodiment is based on a camera system with two eye finder modules, where each eye finder module comprises an objective lens and a camera chip for detecting and determining the position of observer eyes in at least one object plane, and where the camera system is connected with a control unit.
    Type: Application
    Filed: February 24, 2010
    Publication date: August 26, 2010
    Applicant: SeeReal Technologies S.A.
    Inventor: Ralf Haussler
  • Publication number: 20100195178
    Abstract: 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: Application
    Filed: June 5, 2008
    Publication date: August 5, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Norbert Leister, Ralf Haussler
  • Publication number: 20100165428
    Abstract: A device for minimizing diffraction-related dispersion in spatial light modulators for holographically reconstructing colored representations is disclosed, and comprises a spatial light modulator designed as a diffractive optical element and provided with controllable structures, and at least one light source illuminating the spatial light modulator. Wavelength-dependent visible ranges associated with a predefined higher order of diffraction have a lateral chromatic offset relative to the position of the extensions of said visible ranges at a defined viewer's level, said lateral chromatic offset being in relation to the normal line to the surface of the spatial light modulator. The quality of reconstruction is improved regardless of the direction of incidence and emergence of the light.
    Type: Application
    Filed: February 28, 2008
    Publication date: July 1, 2010
    Applicant: SeeReal Technologies S.A.
    Inventor: Ralf Haussler
  • Publication number: 20100118117
    Abstract: A 3D content generation system comprising a content generating party that generates 2D content and sends that content to a remote intermediary. The remote intermediary processes the content to facilitate subsequent holographic reconstruction and sends the processed content to a holographic display device which locally generates a 3D holographic reconstruction of the content. An advantage is that 2D content may be processed remotely to provide 3D holographic content.
    Type: Application
    Filed: October 26, 2007
    Publication date: May 13, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20100103485
    Abstract: A holographic display comprising light sources (L51, L52, . . . ) 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 (VOWL) and the other illuminates the virtual observer windows for m right eyes (VOWR). In one example, m=1. An advantage is 2D-encoding with vertical and horizontal focusing and vertical and horizontal motion parallax.
    Type: Application
    Filed: October 26, 2007
    Publication date: April 29, 2010
    Applicant: SeeReal Technologies S.A.
    Inventor: Ralf Haussler
  • Publication number: 20100097439
    Abstract: 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: Application
    Filed: October 26, 2007
    Publication date: April 22, 2010
    Applicant: SEE REAL TECHNOLOGIES S.A.
    Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20100053711
    Abstract: A device for the selection of light of at least one diffraction order comprises a light modulator device comprising a hologram. The light modulator device emits modulated light, where the light comprises one beam which is not deflected by the hologram and at least one diffracted beam. The device comprises at least one controllable angle-selective optical element which selects the light of diffraction orders.
    Type: Application
    Filed: June 25, 2007
    Publication date: March 4, 2010
    Inventor: Ralf Haussler
  • Publication number: 20100046050
    Abstract: Holographic display device comprising a first EASLM and a second EASLM, the pair permitting independent modification of phase and amplitude, in which holographic reconstruction is visible through one or more virtual observer windows. An advantage is that an observer may view a holographic reconstruction through one or more virtual observer windows from a device housing a pair of EASLMs which permit independent modification of phase and amplitude.
    Type: Application
    Filed: October 26, 2007
    Publication date: February 25, 2010
    Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20100045775
    Abstract: The invention relates to a holographic reconstruction system for the reconstruction of scenes having at least one video hologram modulated wave front, and an enlarged visibility region. The system utilizes two-dimensional coded light modulator cells of spatial light modulation means and optical focusing means, which realize a Fourier transformation of the modulated wave front in their focal plane. First optical deflection means deflect the parallel disposed partial light waves such that their Fourier transformations appear as cascading in the focal plane. A spatial frequency filter located on the focal plane, lets each of the same diffraction orders of all modulated partial light waves pass, and second optical deflection means arrange the wave front strips next to each other at the modulated wave front, which reconstructs the scene.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 25, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Ralf Haussler, Joachim Gantz
  • Publication number: 20100046049
    Abstract: A holographic display device comprises an OLED array writing onto an OASLM, the OLED array and OASLM forming adjacent layers. The OASLM encodes a hologram and a holographic reconstruction is then generated by the device when an array of read beams illuminates the OASLM. The OASLM is suitably controlled by the OLED array. An advantage of the device is that it lends itself to compactness.
    Type: Application
    Filed: October 26, 2007
    Publication date: February 25, 2010
    Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20100027083
    Abstract: A holographic display device comprises a first OLED array writing onto a first OASLM, the first OLED array and the first OASLM forming adjacent layers, and a second OLED array writing onto a second OASLM, the second OLED array and the second OASLM forming adjacent layers. The first and the second OASLMs encode a hologram and a holographic reconstruction is generated by the device when an array of read beams illuminates the first and second OASLMs and the first and second OASLMs are suitably controlled by the first and second OLED arrays. Advantages include that this device permits independent control of phase and amplitude, and the device lends itself to compactness.
    Type: Application
    Filed: October 26, 2007
    Publication date: February 4, 2010
    Applicant: SeeReal Technologies S.A.
    Inventors: Bo Kroll, Ralf Haussler, Armin Schwerdtner
  • Publication number: 20100014136
    Abstract: The invention relates to a holographic projection system wherein light modulator means SLM with electromechanically moved micro-mirrors modulate a light wave front LWmod. According to the invention, a hologram processor HP sets micro-mirror surfaces of prior art spatial light modulator which are disposed as controllable diffraction gratings on a substrate of a control circuit, such that they reach a certain diffraction grating amplitude, by moving them continuously at right angles to the substrate, said diffraction grating amplitude being dependent on the content of a sequence of video holograms. The diffraction grating modulate a light wave which is emitted by the light modulator means and which generates illumination capable of generating interference according to a phase hologram, so that the modulated light wave is used directly for the holographic reconstruction.
    Type: Application
    Filed: August 10, 2007
    Publication date: January 21, 2010
    Inventors: Ralf Haussler, Armin Schwerdtner
  • Patent number: 7643189
    Abstract: A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using electronically controllable pixel in a holographic array (3) with a conventional resolution, and is reasonably free from flickering and cross-talk. Reconstruction is in real time, and for both eyes at the same time, over a large viewing zone. The method takes advantage of an optical focusing means (2) in order to image vertically coherent light emitted by a line light source (1) into viewing windows (8R, 8L) after modulation by the pixel array (3). The holographic reconstruction (11) of the scene is rendered visible from viewing windows (8R, 8L) for both eyes of an observer by way of diffraction at the pixels.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: January 5, 2010
    Assignee: SeeReal Technologies GmbH
    Inventors: Armin Schwerdtner, Ralf Haussler, Norbert Leister
  • Publication number: 20090225380
    Abstract: 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: Application
    Filed: May 18, 2009
    Publication date: September 10, 2009
    Applicant: SeeReal Technologies S.A.
    Inventors: Armin Schwerdtner, Ralf Haussler, Norbert Leister
  • Publication number: 20090219385
    Abstract: The invention relates to a method for the multimodal representation of image contents on a display unit for video holograms. Said unit comprises at least one or several light sources (LS), an optical system (L), and a spatial light modulator SLM (S) with hologram contents. According to the inventive method, the unit directs the wavefront that an object would emit to the associated eye positions (EP) such that the viewer sees the reconstruction of the scene and different views are presented to the eyes by means of temporal or spatial multiplexing in order to generate the stereo effect.
    Type: Application
    Filed: December 20, 2006
    Publication date: September 3, 2009
    Inventors: Norbert Leister, Ralf Haussler, Philippe Renaud-Goud