Patents by Inventor Michel R. Lequime

Michel R. Lequime 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 apparatus for detecting and measuring a physical magnitude
    Patent number: 5200796
    Abstract: A method and apparatus for measuring a physical magnitude by means of an incoherent light source (10), an interferometric sensor (14) modulating the spectrum of the light beam emitted by the source at a characteristic frequency which is a function of the magnitude to be measured, a demodulator interferometer (18), and spectrum analysis means (22) having optical resolution making them insensitive to the modulation frequencies generated by the sensor (14) and the demodulator interferometer (18), and sensitive to the difference therebetween. The invention is particularly applicable for measuring physical magnitudes such as temperature, motion, electric field, etc.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: April 6, 1993
    Assignee: Bertin & Cie
    Inventor: Michel R. Lequime