A Quasi Heterodyne Holographic Technique And Automatic Algorithms For Phase Unwrapping

D. P. Towers; T. R. Judge; P. J. Bryanston-Cross

doi:10.1117/12.962786

20 November 1989 A Quasi Heterodyne Holographic Technique And Automatic Algorithms For Phase Unwrapping

D. P. Towers, T. R. Judge, P. J. Bryanston-Cross

Proceedings Volume 1163, Fringe Pattern Analysis; (1989) https://doi.org/10.1117/12.962786
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

This paper describes recent developments on methods for quantitative analysis of holographic interferograms. Two areas are considered : the holographic system and the automatic processing of fringe images. The holographic system is based on a quasi heterodyne technique. Methods for reconstructing the image with a single beam are presented. This produces a continuously variable phase difference between the two images of the object. An analysis of the errors has been performed for the reconstructed phase maps. A tiling approach and graph theory have been applied to the fringe field processing problem. This has produced an automatic method for analysing fringes forming an optimum solution for a phase or height map.

Citation Download Citation

D. P. Towers, T. R. Judge, and P. J. Bryanston-Cross "A Quasi Heterodyne Holographic Technique And Automatic Algorithms For Phase Unwrapping", Proc. SPIE 1163, Fringe Pattern Analysis, (20 November 1989); https://doi.org/10.1117/12.962786

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