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28 August 2016 Orthogonal polynomials and global optimization based demodulation of two-shot fringe patterns
Chao Tian, Shengchun Liu
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Proceedings Volume 9960, Interferometry XVIII; 996018 (2016) https://doi.org/10.1117/12.2238342
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
We propose a simple yet effective phase demodulation algorithm for two-shot fringe patterns with random phase shifts. The phase to be recovered is decomposed into a linear combination of finite terms of orthogonal polynomials; the expansion coefficients and the phase shift are exhaustively searched through global optimization. The technique is insensitive to noise or defects, and is capable of retrieving phase from low fringe-number interferograms. The retrieved phase is continuous and no further phase unwrapping process is required. The method is expected to be promising to process interferograms with regular fringes.
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Chao Tian and Shengchun Liu "Orthogonal polynomials and global optimization based demodulation of two-shot fringe patterns", Proc. SPIE 9960, Interferometry XVIII, 996018 (28 August 2016); https://doi.org/10.1117/12.2238342
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KEYWORDS
Fringe analysis
Phase shifts
Phase shifts
Demodulation
Interferometry
Optimization (mathematics)
Algorithm development
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