Strain measurement

Details Strain measurement Strain measurement

1977-06-29

1979-11-06

Corbin, John K.

Optics: measuring and testing

Material strain analysis

With polarized light

356 731, G01B 1116, G01J 404

Patent

active

041734122

ABSTRACT:
A strain sensor providing an optical read-out that is suitable for use in electrically noisy environment or one subject to mechanical vibration consists of one or a set of single mode optical fibres wound round an expanding strain member. The principle of operation relies upon the fact that transverse straining of a single mode fibre destroys mode degeneracy thereby producing birefringence effects that can be rendered obversable using polarized light and a polarization analyzer.

REFERENCES:
Kapron et al., "Birefringence in Dielectric Optical Waveguides," IEEE Jr. Quantum Electronics QE-8, 2-1972, pp. 222-225.
Papp et al., "Polarization Optics of Index-Gradient Optical Waveguide Fibers," Applied Optics, vol. 14, 1975, pp. 2406-2411.
Dyott et al., "Group Delay in Glass-Fibre Waveguide," Electronics Lett. 2-1971, pp. 82-84.

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