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Proceedings Paper

Speckle noise suppression in shape and deformation measurements by phase-shifting digital holography
Author(s): Ichirou Yamaguchi
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Paper Abstract

A new algorithm of data analysis is proposed for shape and deformation measurement of diffusely reflecting surfaces by digital holography. It derives the phase of the averaged conjugate product of complex amplitudes before and after wavelength change or object deformation, corresponding to the complex coherence factor and is consistent with a theory on fringe formation in holographic interferometry. By experiments and computer simulations it has been shown that the algorithm is much more immune to speckle noise in phase analysis and unwrapping than conventional methods.

Paper Details

Date Published: 3 October 2008
PDF: 9 pages
Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71551D (3 October 2008); doi: 10.1117/12.814549
Show Author Affiliations
Ichirou Yamaguchi, Toyo Seiki Seisaku-sho, Ltd. (Japan)

Published in SPIE Proceedings Vol. 7155:
Ninth International Symposium on Laser Metrology
Chenggen Quan; Anand Asundi, Editor(s)

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