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Proceedings Paper

Reconstruction of a decentered wavefront using the method of direct integration of phase gradient starting from several phase-shifted interferograms requiring no phase unwrapping
Author(s): Gonzalo Paez; Marija Strojnik
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Paper Abstract

A simple and elegant method to determine unambiguously the phase from several phase-shifted interferograms (intensity fringe patterns) is presented. Instead of calculating the arc- tangent, a line integral of the phase gradient is evaluated. The ambiguities introduced due to the multiple values of the arc-tangent function are avoided, eliminating the necessity for the complex methods of phase unwrapping. This method works effectively even in the regions of high intensity gradients, is insensitive to the profile of the illuminating beam and to the shape of the domain boundaries. The algorithm is applied to the special case of four phase-shifted interferograms to demonstrate the phase determination procedure.

Paper Details

Date Published: 23 October 1997
PDF: 10 pages
Proc. SPIE 3122, Infrared Spaceborne Remote Sensing V, (23 October 1997); doi: 10.1117/12.292709
Show Author Affiliations
Gonzalo Paez, Centro de Investigaciones en Optica (Mexico)
Marija Strojnik, Centro de Investigaciones en Optica (Mexico)

Published in SPIE Proceedings Vol. 3122:
Infrared Spaceborne Remote Sensing V
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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