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Proceedings Paper

New adaptive phase-shifting algorithm for temporal phase evaluation
Author(s): Pablo D. Ruiz; Guillermo H. Kaufmann; Jonathan Mark Huntley
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Paper Abstract

The measurement of dynamic displacements using speckle interferometry and temporal phase unwrapping allows the evaluation of displacement fields without the propagation of spatial unwrapping errors. In this work we present a novel temporal phase-shifting (TPS) method that searches for the peak of the windowed Fourier transform of the modulated intensity signal and evaluates the phase at that frequency instead of at the carrier frequency. The performance of this TPS method is compared with that of standard algorithms by using numerical simulations. The unwrapping success rate and the spatial rms phase error are evaluated, and experimental results that show the performance of this new approach are finally presented.

Paper Details

Date Published: 20 June 2002
PDF: 8 pages
Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); doi: 10.1117/12.472226
Show Author Affiliations
Pablo D. Ruiz, Instituto de Fisica de Rosario (Argentina)
Guillermo H. Kaufmann, Instituto de Fisica de Rosario (Argentina)
Jonathan Mark Huntley, Loughborough Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 4777:
Interferometry XI: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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