Patents by Inventor Gilbert L. Bourdet

Gilbert L. Bourdet 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).

  • Apparatus and method for distance measurement by laser interferometry
    Patent number: 4492464
    Abstract: The apparatus and method include adjusting two single frequency lasers to separate longitudinal modes of an interferometer, the plates of which are separated by a distance to be measured. A rough estimate of the distance is made using a tape measure or the like. The rough estimate, together with the frequency distance (.DELTA.F) of the lasers adjusted to the longitudinal modes of the interferometer is used to solve the equation: ##EQU1## where c is the speed of light and L.sub.1 is the rough estimate. The parameter k then calculated by rounding k.sub.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: January 8, 1985
    Assignee: Agence Nationale de Valorisation de la Recherche
    Inventors: Gilbert L. Bourdet, Michel A. Franco