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:
Apr. 08, 1980
Filed:
May. 04, 1978
Applicant:
Inventors:
Bruno Costa, Turin, IT;
Bruno Sordo, Dogliani-Cuneo, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 731 ; 356432 ;
Abstract
To intercept and measure radiant energy back-scattered from the entrance end of an optical fiber irradiated by a pulsed laser beam, a semitransparent mirror is interposed between the irradiated fiber and a first lens assembly focusing the laser beam upon its entrance end while a second lens assembly directs reflected light rays toward a photodetector feeding an electronic processor. An extremity of the fiber including its entrance end is received in a chamber with light-absorbing walls filled with a liquid of substantially the same refractive index as the fiber; the mirror may be disposed either in front of the chamber entrance or in its interior.