Patents by Inventor Jean-Michel Mathe

Jean-Michel Mathe 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).

  • Method and a device for measuring speed by the doppler effect
    Patent number: 6522397
    Abstract: A method and device for measuring the speed of at least one object by Doppler effect, whereby the light diffused by an object illuminated by a laser sheet is transmitted to a CCD video camera by spectral filtering means which are substantially tuned to the laser illumination frequency, means being provided to generate reference monochromatic luminous fluxes having frequencies which are different from the laser illumination frequency by fixed known amounts, and the reference luminous fluxes being transmitted to the CCD video camera.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: February 18, 2003
    Assignee: ONERA (Office National d′Etudes et de Recherches Aerospatiales)
    Inventors: Philippe Barricau, André Mignosi, Christine Lempereur, Jean-Michel Mathe
  • Method and a device for measuring speed by the doppler effect
    Publication number: 20020071110
    Abstract: A method and device for measuring the speed of at least one object by Doppler effect, whereby the light diffused by an object illuminated by a laser sheet is transmitted to a CCD video camera by spectral filtering means which are substantially tuned to the laser illumination frequency, means being provided to generate reference monochromatic luminous fluxes having frequencies which are different from the laser illumination frequency by fixed known amounts, and the reference luminous fluxes being transmitted to the CCD video camera.
    Type: Application
    Filed: November 26, 2001
    Publication date: June 13, 2002
    Inventors: Philippe Barricau, Andre Mignosi, Christine Lempereur, Jean-Michel Mathe
  • Electro- optical device and process for real time measurement of the motion of a mobile rigid structure under the influence of a fluid
    Patent number: 4843460
    Abstract: Real time measurement of the motion of a rigid mobile structure in a fluid is achieved by a device comprising at least four unaligned bright spots arranged in a predetermined way on the structure under observation and at least two synchronized video cameras which are arranged with respect to a fixed point. The dimensions of each bright spot are such that the image of each bright spot is intercepted at the focal plane of each camera by about five to fifteen scanning lines. The processing and computing device provides the following functions: collection of the image coordinates of points whose brightness exceeds a certain predetermined level; counting and memorization of these coordinates and of the lengths of the segments of the bright spots intercepted by the scanning lines; calculation of the image coordinates of the barycenters of the bright spots and, finally, calculation of the three-dimensional coordinates of these barycenters to the fixed point.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: June 27, 1989
    Assignee: Etat Francais
    Inventors: Pierre-Loic Le Guet, Christine Lempereur, Jean-Michel Mathe