Waveguide method for determining stress at the convex surface of

Details Waveguide method for determining stress at the convex surface of Waveguide method for determining stress at the convex surface of

1978-02-27

1980-06-10

Corbin, John K.

Optics: measuring and testing

Material strain analysis

With polarized light

356 35, 356 731, G01B 1116

Patent

active

042070007

ABSTRACT:
Method comprises (1) introducing a polarized light beam into the convex surface of an optically-transparent body whereby the beam propagates in the body in a guided manner near the surface, (2) extracting at least a portion of the beam from the body through the surface at a distance from where the beam was introduced, (3) sensing the change in polarization state of the extracted portion of the beam occurring during its propagation in the body, and (4) calculating the value of stress from the sensed change in polarization state.

REFERENCES:
patent: 3286581 (1966-11-01), Acloque et al.
Acloque et al., "Method for the Photoelastic Measurement of Stresses in Equilibrium in the Thickness of a Plate (particular cases of Toughened Glass & Bent Glass)," Physics Abstracts, 10-1961, General Mechanics, Abst. #11725.
Sheem, S. K., "Three-Dimensional Curved Surface for Integrated Optics", App. Optics, vol. 14, 8-1975, pp. 1854-1859.
Sheem et al., "Modes of a Curved Surface Waveguide for Integrated Optics", Wave Electronics, vol. 1, 1974-1975, pp. 105-116.

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