Optical strain gauge

Details Optical strain gauge Optical strain gauge

1982-02-16

1984-03-13

Sikes, William L.

Optics: measuring and testing

Material strain analysis

By light interference detector

356349, 356356, G01B 902

Patent

active

044364199

ABSTRACT:
A noncontact optical strain gauge may be used for high temperature objects and objects having a small radius of curvature in the area of interest. The gauge works by means of interferometry applied to the speckle patterns of radiation reflected from two points on the object surface.

REFERENCES:
patent: 3914056 (1975-10-01), Mottier et al.
Dandliker et al. "High Resolutin Hologram Interferometry by Electronic Phase Measurement", Optics Communications, vol. 9. No. 4, pp. 412-416 12/73.
Dandliker et al., "Quantitative Determination of Bending and Torsion . . . ", The Engineering Uses of Coherent Optics, Cambridge U. Press, pp. 99-117, 1976.
Ineichen et al., "Accuracy and Reproducibility of Heterodyne Hobgraphic Interferometry", Appl. of Holography & Opt. D. P., Jerusalem, Israel, pp. 207-212, 8/76.
Yamaguchi, "A Laser-Speckle Strain Gauge", J. Phys. E. Sci-Instru. vol. 14, No. 11, pp. 1270-1273, 11/81.

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