Fiberoptic temperature transducer

Details Fiberoptic temperature transducer Fiberoptic temperature transducer

1992-10-05

1994-03-15

Lee, John D.

Optical waveguides

Optical waveguide sensor

2502311, 374 55, 374130, 374131, 385 15, G02B 602

Patent

active

052952061

ABSTRACT:
A temperature measuring system that utilizes an electronic control unit and a rod made of a first material with a first thermal coefficient of expansion, the rod being attached at one end within a tubular device made of a material having a second coefficient of expansion. A reflecting surface is on the outer end of the rod of first material. At least one optical fiber is associated with the tubular member and is located so as to create a gap between the optical fiber and the reflecting surface. The first and second materials are chosen based upon their respective coefficients of thermal expansion such that a change in temperature of both materials will cause the length of the gap to either increase or decrease, thereby causing a change in the amount of light that is reflected and detected by the optical fibers.

REFERENCES:
patent: 4176551 (1979-12-01), Hammer et al.
patent: 4672199 (1987-06-01), Anderson et al.

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