Electrically passive fiber optic position sensor

Details Electrically passive fiber optic position sensor Electrically passive fiber optic position sensor

1990-06-15

1991-08-27

Gonzalez, Frank

Optical waveguides

Optical waveguide sensor

Including physical deformation or movement of waveguide

25022716, 385 1, 385 15, G02B 602

Patent

active

050429051

ABSTRACT:
An electrically passive fiber optic position sensor having a course measurement indicator and a fine measurement indicator combined to determine the overall position, whether linear or angular, of an object measured. The coarse measurement sensor depends on bending loss of optic fiber in one embodiment and on the Faraday effect in another embodiment. The fine measurement indicator depends on the Faraday effect in both embodiments. The invention avoids the problems of contaminated optics as the light need not leave the optic fiber.

REFERENCES:
patent: 4376248 (1983-03-01), Giallorenzi et al.
patent: 4588296 (1986-05-01), Cahill et al.
patent: 4733938 (1988-03-01), Lefevre et al.
patent: 4843232 (1989-06-01), Emo et al.
"Fiber Optic Sensor for Aircraft", in SPIE vol. 985 Fiber Optic and Laser Sensors VI (1988).

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