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. 23, 2010
Filed:
Apr. 17, 2009
Akira Sakamoto, Sakura, JP;
Keiichi Horimoto, Sakura, JP;
Yoshikiyo Noguchi, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
Optical fiber thermometer includes one optical fiber that relays light from the light source to a measuring unit, two parallel optical fibers that relay light from a mirror at the measuring unit to two light-receiving units, and an arithmetic processing circuit that calculates the temperature of the measuring unit from the ratio of electrical signals from the two light-receiving units; end surfaces of three optical fibers facing the reflecting face being fixed at an angle θ between the longitudinal direction of the optical fibers and the normal to the reflecting face that is not zero, the angle between the optical fibers for reception and projection being symmetrical based on the normal to the reflecting face. Each of the optical fibers is a single-mode fiber at the wavelength being used.