Reconstruction of a decentered wavefront using the method of direct integration of phase gradient starting from several phase-shifted interferograms requiring no phase unwrapping

Gonzalo Paez; Marija Strojnik

doi:10.1117/12.292709

23 October 1997 Reconstruction of a decentered wavefront using the method of direct integration of phase gradient starting from several phase-shifted interferograms requiring no phase unwrapping

Gonzalo Paez, Marija Strojnik

Author Affiliations +

Proceedings Volume 3122, Infrared Spaceborne Remote Sensing V; (1997) https://doi.org/10.1117/12.292709
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Gonzalo Paez and Marija Strojnik "Reconstruction of a decentered wavefront using the method of direct integration of phase gradient starting from several phase-shifted interferograms requiring no phase unwrapping", Proc. SPIE 3122, Infrared Spaceborne Remote Sensing V, (23 October 1997); https://doi.org/10.1117/12.292709

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