Improvement on phase-shifting method precision and application on shadow moire method

Gerard Mauvoisin; Fabrice J. Bremand; Alexis Lagarde

doi:10.1117/12.57488

1 December 1991 Improvement on phase-shifting method precision and application on shadow moiré method

Gerard Mauvoisin, Fabrice J. Bremand, Alexis Lagarde

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57488
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Phase shifting technique is more and more employed in photomechanic even on optical methods which are not well adapted for it, particularly for shadow moiré method where the phase shift is realized by translating the object. In such case, good results are obtained only if translation is executed with high accuracy. We present the effect of unaccuracy phase shift evaluation on the form and amplitude of calculated phase error. In this article, we propose a new automated procedure based on the use of a 2.D. F.F.T. algorithm to determine precisely the phase shift value introduced by a coarse object translation. We finally present an application on the out-of-plane displacement measurement on bended plate in corrugated paper. An order of largeness is given for await precision on such measurement.

Citation Download Citation

Gerard Mauvoisin, Fabrice J. Bremand, and Alexis Lagarde "Improvement on phase-shifting method precision and application on shadow moiré method", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57488

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