Abstract

New methods of optical differentiation of fringe patterns obtained by the moire interferometry method are presented. They provide spatial derivatives of in-plane and out-of-plane displacements of the specimen under load in the form of moire or two-beam interference fringes. Either the uniform or finite fringe detection mode can be used. Simulation experiments using specially prepared transmission-type gratings are given to verify the principles.

© 1985 Optical Society of America

Generation of the derivative of out-of-plane displacements using conjugate shear and moire interferometry

Krzysztof Patorski
Appl. Opt. 25(18) 3146-3151 (1986)

Real-time optical differentiation for moire interferometry

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

Shearing interferometry and the moire method for shear strain determination

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

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

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

Talbot interferometry with increased shear

Krzysztof Patorski
Appl. Opt. 24(24) 4448-4453 (1985)