Fiber optic fluid detector

Details Fiber optic fluid detector Fiber optic fluid detector

1987-02-27

1989-05-30

Sikes, William L.

350 9615, 350 9630, G02B 616

Patent

active

048344974

ABSTRACT:
Particular gases or liquids are detected with a fiber optic element (11, 11a to 11j) having a cladding or coating of a material (23, 23a to 23j) which absorbs the fluid or fluids and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the fluid. The fluid is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The fluid detector (24, 24a to 24j) may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring fluid flows in industrial processes, among other uses.

REFERENCES:
patent: 4050895 (1977-09-01), Hardy et al.
patent: 4270049 (1981-05-01), Tanaka et al.
patent: 4367040 (1983-01-01), Goto
patent: 4399099 (1983-08-01), Buckles
patent: 4600310 (1986-07-01), Cramp et al.
patent: 4634856 (1987-01-01), Kirkham
patent: 4710353 (1987-12-01), Tanaka et al.

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