Iterative method to obtain the wrapped phase in an interferogram with a linear carrier

There is a great variety of techniques used to obtain the wrapped phase of a carrier frequency interferogram. We are interested in interferograms that have a bounded region data. Analyses of this kind of interferograms with t he Fourier or synchronous method have an important source of error at the e dge of the interferogram. In this paper we propose a new method that works out this boundary error effect. We describe an iterative synchronous method to obtain a very good phase estimation of a carrier frequency interferogra m bounded by an arbitrary pupil's shape. We also show that the proposed ite rative method has a continuous and stable convergence towards the true modu lating phase of the interferogram. (C) 2000 Published by Elsevier Science B .V. All rights reserved.