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:
Jun. 02, 1992
Filed:
Aug. 09, 1990
Applicant:
Inventors:
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
356350 ; 385 14 ;
Abstract
A Sagnac-type fiber-optic gyroscope having a light source, a fiber coil consisting of an optical fiber, a receiver arrangement which are all connected with gates of a directional coupler, in which the light fed into the fiber coil interferes with the light emerging from the fiber coil in a coupling area and the rate of rotation of the fiber-optic gyroscope is determined from the interference signals. In order to achieve a working point which is situated in or close to the quadrature point, the directional coupler is developed as a 4.times.4 coupler between the arms of which fixed phase relations are provided in the coupling area.