Application Of Moire Analysis Of Strain Using Fourier Transform

Yoshiharu Morimoto; Yasuyuki Seguchi; Toshihiko Higashi

doi:10.1117/12.941711

17 February 1987 Application Of Moire Analysis Of Strain Using Fourier Transform

Yoshiharu Morimoto, Yasuyuki Seguchi, Toshihiko Higashi

Proceedings Volume 0814, Photomechanics and Speckle Metrology; (1987) https://doi.org/10.1117/12.941711
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

By shifting the discrete Fourier spectrum of the image of a deformed grating, we can obtain "the complex moire pattern", from which strain distribution is given as the derivatives of the phases of the complex moire fringes. The analysis is completely automatized by introducing the digital image processing. All of the laborious and subjective procedures required in the conventional analysis such as fringe sign determination, fringe ordering, fringe interpolation are so eliminated that objective, fast and accurate analysis can be made. Some applications for rubber plates are shown.

Citation Download Citation

Yoshiharu Morimoto, Yasuyuki Seguchi, and Toshihiko Higashi "Application Of Moire Analysis Of Strain Using Fourier Transform", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); https://doi.org/10.1117/12.941711

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