13 September 2012 Regularized self-tuning phase demodulation for phase-shifting interferometry with arbitrary phase shifts
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Proceedings Volume 8493, Interferometry XVI: Techniques and Analysis; 84930K (2012); doi: 10.1117/12.929756
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States
Abstract
In this work, we develop a regularization technique to demodulate a phase-shifting interferogram sequence with arbitrary inter-frame phase shifts. With this method, we can recover the modulating phase and inter-frame phase shifts in the same process. As all phase-shifting algorithms, the assumption is that the wavefront under test does not change over time, but the introduction of phase-shifts can vary in a nonconstant way. A notable characteristic of this demodulation method is that not only can it recover the modulating phase, but it is also capable of filtering-out large amounts of corrupting noise. We will show numerical experimental results and comparisons with another already published method to see the performance of the demodulation technique developed herein.
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Orlando Medina, Julio C. Estrada, Manuel Servin, "Regularized self-tuning phase demodulation for phase-shifting interferometry with arbitrary phase shifts", Proc. SPIE 8493, Interferometry XVI: Techniques and Analysis, 84930K (13 September 2012); doi: 10.1117/12.929756; https://doi.org/10.1117/12.929756
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