Electro-optic strain gages and transducer

Details Electro-optic strain gages and transducer Electro-optic strain gages and transducer

1994-06-13

1998-09-22

Rosenberger, Richard A.

Optics: measuring and testing

Material strain analysis

73800, G01B 1116

Patent

active

058122516

ABSTRACT:
The present invention is disclosed comprising a light source, photo detector and a lens system as its main parts. The effect of light intensity on changing current through the photo detector due to the linear or angular displacement of the detector with respect to the light source is the focusing point of this idea. The basic unit of this invention consists of a light source and a detector aiming at each other with a set of lens in between and all are pre-assembled on a film of polymer. The assembly then can be glued on the surface of any test specimen to measure any possible strain. As an alternative, two heads of fiber optic cables can be preassembled on the mounting polymer pointing toward each other. In this method, optical fibers are used to carry the light and the light source and detectors can be isolated from any ambient electro magnetic noise and away from the testing equipment. Lenses are utilized to either converge or to columnate the light rays.

REFERENCES:
patent: 4071753 (1978-01-01), Fulenwider et al.
patent: 4611378 (1986-09-01), Caserta et al.
patent: 4674900 (1987-06-01), Erzsebet et al.

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