Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-07-12
1988-02-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250231R, 350 9629, G01B 1116, G01D 526
Patent
active
047243163
ABSTRACT:
Disclosed is an improved fiber optic sensor of the type in which a fiber optic waveguide component of the sensor is configured to be responsive to an external parameter such that curvature of the fiber optic waveguide is altered in response to forces induced by changes in the external parameter being sensed. The alteration of the curvature of the fiber optic waveguide causes variations in the intensity of light passing therethrough, these variations being indicative of the state of the external parameter. The improvement comprises coating material covering the exterior portion of the fiber optic waveguide, the coating material having an expansion coefficient and thickness such that distortion of the fiber optic waveguide caused by thermally induced stresses between the coating material and the glass fiber is substantially eliminated. Also disclosed is a support member for supporting the curved fiber optic waveguide, the support member and fiber optic waveguide being configured and arranged to minimize the effects of thermal stress tending to separate the waveguide from the support member.
REFERENCES:
patent: 4071753 (1978-01-01), Fulenwider et al.
patent: 4163397 (1979-08-01), Harmer
patent: 4235113 (1980-11-01), Carome
patent: 4238856 (1980-12-01), Bucaro et al.
patent: 4294513 (1981-10-01), Nelson et al.
patent: 4295738 (1981-10-01), Meltz et al.
patent: 4297684 (1981-10-01), Butter
patent: 4313192 (1982-01-01), Nelson et al.
patent: 4342907 (1982-08-01), Macedo et al.
patent: 4358678 (1982-11-01), Lawrence
patent: 4408495 (1983-10-01), Couch et al.
patent: 4436995 (1984-03-01), Whitten
patent: 4564289 (1986-01-01), Spillman, Jr.
Yamamoto et al, "High-Modulus Low-Linear-Expansion-Coefficient Loose-Jacket Optical Fibers"; Journal of Lightwave Technology; vol. LT-2, No. 2, Apr. 1984, pp. 83-87.
Specification sheet for a buffer coated fiber optic waveguide manufactured by Spec Tran Corporation under the trademark SPECTRAGUIDE (11/83).
Pp. 91, 94 and 96 from "Laser Focus/Electro-Optics" (12/84).
ELDEC Corporation
Westin Edward P.
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