Patents by Inventor Jacques Chapellier

Jacques Chapellier 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).

  • Device for controlling vibration-free movement of an optical element in a stellar inteferometer and stellar interferometer comprising same
    Patent number: 5008606
    Abstract: A carriage moves on a track and carries, through a flexible linkage, a chassis to which is fixed a payload including an optical element. A linear actuator controls the linkage so as to correct imperfections in displacement of the payload. A piezo-electric accelerometer delivers a filtered signal to control the linear actuator so as to eliminate the effect on the payload of vibration of the carriage. There are two independent control loops, one for controlling the carriage and the other for controlling the chassis. The device is applicable to controlling the mobile part of an optical delay line or of a telescope in a stellar interferometer.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: April 16, 1991
    Assignee: Societe Nationale Industrielle et Aerospatiale
    Inventors: Bertrand Koehler, Emmanuel Manil, Jacques Chapellier