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Robust decorrelation-based iterative algorithm for accurate phase extraction from disturbed fringe patterns
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DOI：10.1364/OL.491355.png)
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Abstract
En 中文
We propose an accurate and robust phase extraction method for phase-shifting interferometry to reduce the phase ripple error caused by illumination, contrast, phase-shift spa-tiotemporal variation, and intensity harmonics. In this method, a general physical model of interference fringes is constructed, and the parameters are decoupled using a Taylor expansion linearization approximation. In the itera-tive process, the estimated illumination and contrast spatial distributions are decorrelated from the phase, thus reduc-ing damage to the algorithm's robustness caused by a large number of linear model approximations. To the best of our knowledge, no method has been able to extract the phase dis-tribution robustly and with high accuracy while considering all of these error sources simultaneously without imposing constraints inconsistent with the practical conditions.& COPY; 2023 Optica Publishing Group