Digital evaluation of interferograms

Abstract For one and a half decade, software for interferometric fringe evaluation has been developed and used at Graz University of Technology. Within the framework of an awarded grant, these software packages on interferometric fringe evaluation were subsumed under Windows and Unix platforms and are accessibly under http://optics.tugraz.at . The software focuses on high-resolution digital fringe evaluation including phase stepping, Fourier domain evaluation as well as unwrapping techniques for regular and irregular fringe patterns. For phase objects, Abel-inversion and optical tomography also has been included. New developments on digital holography were taken into account. This paper describes the methods used and focuses on their implementation in such a universal software.

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