Abstract

By time-average recording of laser speckles formed on the surface of a structure under sinusoidal oscillation, isothetics along any direction can be obtained by Fourier filtering the resulting specklegram. Principal strains and stresses can then be calculated through the use of strain-rosette equations and the stress-strain law, respectively.

© 1980 Optical Society of America

Thermal strain measurement by one-beam laser speckle interferometry

F. P. Chiang, R. Anastasi, J. Beatty, and J. Adachi
Appl. Opt. 19(16) 2701-2704 (1980)

Strain analysis by one-beam laser speckle interferometry. 2: Multiaperture method

F. D. Chiang and R. P. Khetan
Appl. Opt. 18(13) 2175-2186 (1979)

Strain analysis by one-beam laser speckle interferometry. 1: Single aperture method

R. P. Khetan and F. P. Chiang
Appl. Opt. 15(9) 2205-2215 (1976)

White light projection speckle method for generating deflection contours

F. P. Chiang and M. Bailangadi
Appl. Opt. 19(15) 2623-2626 (1980)

Hybrid optical and electronic image processing for strain measurements by speckle photography

B. Ineichen, P. Eglin, and R. Dändliker
Appl. Opt. 19(13) 2191-2195 (1980)