The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1981
Filed:
Jul. 17, 1979
Applicant:
Inventor:
Georges Pircher, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
356350 ;
Abstract
A laser gyrometer for the measure of the angular speed of a rotating system, comprising an optical fiber wound around the rotation axis, in which two coherent light beams are guided in the direction of the rotation and in the opposite direction, respectively, so as to be subjected to the Sagnac effect. The two beams emerging from the two ends of the fiber are directed along two separate adjacent parts of one beam. Measurement of the phase shift between the two parts is based on the displacement of the center of the diffraction spot obtained in the focal plane of a lens, positioned in the path of the beam.