Patents by Inventor Henri Rajbenbach

Henri Rajbenbach 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).

  • SYSTEM FOR ACQUIRING THREE-DIMENSIONAL FINGERPRINTS AND METHOD OF ACQUISITION
    Publication number: 20020106115
    Abstract: The invention concerns a system for acquiring three-dimensional fingerprints, characterised in that it comprises: a medium (1) for receiving at least the object whose print is to be taken; optical image recording means (2); means for optical imaging (3) of the surface of the finger on the recording means. This system is applicable for acquiring fingerprints. It comprises various means for immobilising the hand.
    Type: Application
    Filed: September 18, 1998
    Publication date: August 8, 2002
    Inventors: HENRI RAJBENBACH, STEPHANE SAMOUILHAN, JEAN-PIERRE HUIGNARD
  • Process for acquiring fingerprints and device for implementing this process
    Patent number: 6162486
    Abstract: Process for acquiring fingerprints, characterized in that it comprises the following steps:coating, with the aid of an ink, the surfaces of the fingers of a hand whose prints are to acquired;pressing a pad (2) of flexible material against the said coated surfaces;pressing the pad against a recording support (3). According to this process, the print is therefore taken on an intermediate pad and subsequently transferred to a paper support.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: December 19, 2000
    Assignee: Thomson-CSF
    Inventors: Stephane Samouilhan, Henri Rajbenbach, Claude Bricot
  • Device for coherent addition of laser beams
    Patent number: 5121400
    Abstract: Device for coherent addition of laser beams including several optical amplifiers in parallel pumped by a beam coming from a master laser. The beams emitted by these amplifiers are transmitted to a non-linear material and play the role of pump beams. The non-linear material also receives a signal beam derived from the master laser. The various beams of the amplifiers are therefore added in the non-linear material along the direction of the signal beam.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: June 9, 1992
    Assignee: Thomson-CSF
    Inventors: Jean-Marc Verdiell, Jean-Pierre Huignard, Henri Rajbenbach
  • Low-noise optical wave amplification device
    Patent number: 5075573
    Abstract: The invention relates to a low-noise amplification device of an optical wave. Signal wave (F.sub.s) to be amplified interferes with a pump wave (F.sub.p) in such a nonlinear medium (1) as a photorefractive crystal. To reduce the noise considerably, even to eliminate it, the establishing of noise-generating interferences therefore is prevented by moving, by rotation around an axis O, the nonlinear medium.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: December 24, 1991
    Assignee: Thomson-CSF
    Inventors: Jean-Pierre Huignard, Henri Rajbenbach
  • Device for recording a coherent image in a multimode optical cavity
    Patent number: 4576434
    Abstract: An optical device for storing a coherent image in a multimode cavity makes use of two interaction media in which photoinduced phase gratings are recorded. By way of example, these media are photorefractive media. A first wave designated as an object wave travels through the cavity and interferes in each of these two media with a pumping wave in order to permit energy transfer from the pumping wave to the first wave.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: March 18, 1986
    Assignee: Thomson-CSF
    Inventors: Jean P. Huignard, Henri Rajbenbach, Brigitte Loiseaux, Jean P. Herriau