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Proceedings Paper

Carrier pattern analysis of moire interferometry using Fourier transform
Author(s): Yoshiharu Morimoto; Daniel Post; Harold E. Gascoigne
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Paper Abstract

The Fourier transform moiré and grid method (FTMGM) which we have previously presented is extended to analyze strain distribution from the image of a fringe pattern with carrier fringes obtained by moiré interferometry. The characteristics of the carrier fringes are explained in the frequency domain. The fringe pattern without carrier fringes is obtained from the fringe pattern with carrier fringes by extracting the first harmonic of the spectrum of the fringe pattern with carrier fringes and shifting it. The strain distribution is obtained by analyzing the phase of the image obtained from the inverse Fourier transform of the shifted first harmonic. Strain analysis of composites under compressive loading are shown.

Paper Details

Date Published: 1 December 1991
Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); doi: 10.1117/12.57433
Show Author Affiliations
Yoshiharu Morimoto, Osaka Univ. (Japan)
Daniel Post, Virginia Polytechnic Institute and State Univ. (United States)
Harold E. Gascoigne, California Polytechnic State Univ. (United States)

Published in SPIE Proceedings Vol. 1554:
Second International Conference on Photomechanics and Speckle Metrology
Fu-Pen Chiang; Fu-Pen Chiang, Editor(s)

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