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:
Mar. 12, 1996
Filed:
Sep. 13, 1994
Marcos Y Kleinerman, Southbridge, MA (US);
Other;
Abstract
Methods and devices for sensing temperature changes at a plurality of locations use a light-transmitting optical fiber system along a path including said locations, said optical fiber system having a first end and a second end and a sensing element of said locations, each sensing element being so characterized that, when exposed to the temperature changes to be sensed and transmitting interrogating light of suitable wavelength or wavelengths .lambda..sub.v and an intensity P.sub.o, it converts a fraction .alpha.P.sub.o of the intensity of said interrogating light into a light separable from the interrogating light, at least part of the intensity of which is emitted from at least one of said two ends of the probe at wavelengths .lambda..sub.f different from .lambda..sub.v, where .alpha. is a temperature-dependent fraction smaller than unity, the value of which increases with increasing temperature within a temperature range, the intensity of said light of wavelengths .lambda..sub.f being substantially proportional to the value of .alpha.. The system can be used to sense the temperature distribution among the different locations, or to provide the spatially averaged temperature along the optical fiber system.