Abstract

Superposition of two double-exposure holographic interferograms creates moiré patterns that can be used to detect flaws. Relative magnification can be used to correct for imprecise replication of loading when the second interferogram is formed; it also can be used to detect flaws when only a single interferogram is used if the basic deformation field is radially symmetric. Digital image processing is a rapid and versatile technique for forming such moiré patterns.

© 1983 Optical Society of America

Moire technique by means of digital image processing

Kjell J. Gasvik
Appl. Opt. 22(22) 3543-3548 (1983)

Orthogonal in-plane and out-of-plane fringe maps in holographic interferometry

Y. Katzir, A. A. Friesem, and I. Glaser
Opt. Lett. 8(3) 163-165 (1983)

Computer-aided speckle pattern interferometry

Suezou Nakadate, Toyohiko Yatagai, and Hiroyoshi Saito
Appl. Opt. 22(2) 237-243 (1983)

Holographic nondestructive testing by an optically generated zone plate

N. Rodriguez, Roberto D. Torroba, Mario Gallardo, and Mario Garavaglia
Appl. Opt. 25(12) 1908-1911 (1986)

Neural network approach to holographic nondestructive testing

Thomas Kreis, Werner Jüptner, and Ralf Biedermann
Appl. Opt. 34(8) 1407-1415 (1995)