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:
Nov. 03, 1987
Filed:
Jun. 02, 1986
Reinhard Ulrich, Buchholz, DE;
Wilfried Auch, Asperg, DE;
Standard Elektrik Lorenz, Stuttgart, DE;
Abstract
A rotation rate measuring device is disclosed in which two beam portions travel around an optical-fiber coil (6) in opposite directions, and in which the Sagnac phase difference between the two beam portions after passage through the optical-fiber coil is evaluated. A beam splitter (2) divides a light beam into the two beam portions. Between this beam splitter and one end of the optical-fiber coil (6), an additional beam splitter (4) is inserted which is followed by a spatial filter (13) and a frequency shifter (5). Also provided are means which ensure that the two beam portions which travel around the optical-fiber coil in opposite directions pass through the spatial filter and the frequency shifter by the same path. A fully reciprocal arrangement is thus obtained.