Abstract

A new method of obtaining the spatial derivative of out-of-plane displacements in a moire interferometry setup is presented. It is based on the recently developed concept of conjugate lateral shear interferometry applied to the diffracted beams generated by the specimen grating. The moire fringes produced by overlapping the two interferograms give the desired information using either the uniform or finite fringe detection method. Simulation experiments using specially prepared transmission-type distorted gratings are given to verify the principles.

© 1986 Optical Society of America

Optical differentiation of displacement patterns using moire interferometry

Krzysztof Patorski and Matgorzata Kujawinska
Appl. Opt. 24(18) 3041-3048 (1985)

Conjugate lateral shear interferometry and its implementation

Krzysztof Patorski
J. Opt. Soc. Am. A 3(11) 1862-1870 (1986)

Shearing interferometry and the moire method for shear strain determination

Krzysztof Patorski
Appl. Opt. 27(16) 3567-3572 (1988)

Real-time optical differentiation for moire interferometry

Krzysztof Patorski, Daniel Post, Robert Czarnek, and Yifan Guo
Appl. Opt. 26(10) 1977-1982 (1987)

Two-way gratings for strain analysis using moire and moire interferometry techniques

Krzysztof Patorski and M. Kujawinska
Appl. Opt. 25(7) 1105-1110 (1986)