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. 14, 1989
Filed:
Jul. 20, 1987
Applicant:
Inventors:
Rolf Kirchhofer, Mellingen, CH;
Hanspeter Schad, Rieden, CH;
Assignee:
BBC Brown Boveri AG, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G01N / ;
U.S. Cl.
CPC ...
356 44 ; 374 31 ; 374161 ; 356301 ; 350401 ;
Abstract
A measuring apparatus for space-resolved temperature measurement by optical backscattering measurement at optical waveguides, wherein an improvement in the signal-to-noise ratio is achieved by including an additional filter device to attenuate the Rayleigh peak in the backscattered light. The filter device preferably includes a polarizing beam splitter, behind which a quarter-wave plate and an interference filter are disposed in the transmission direction.
Kirchhofer, Rolf. (1989). Arrangement for time-resolved optical backscatter measurement at optical (U.S. Patent No. 4804264). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4804264
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile