A self-tuning phase-shifting algorithm for interferometry



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Quiroga Mellado, Juan Antonio and Estrada, Julio César and Servín Guirado, Manuel (2010) A self-tuning phase-shifting algorithm for interferometry. Optics Express, 18 (3). pp. 2632-2638. ISSN 1094-4087

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Official URL: http://dx.doi.org/10.1364/OE.18.002632


In Phase Stepping Interferometry (PSI) an interferogram sequence having a known, and constant phase shift between the interferograms is required. Here we take the case where this constant phase shift is unknown and the only assumption is that the interferograms do have a temporal carrier. To recover the modulating phase from the interferograms, we propose a self-tuning phase-shifting algorithm. Our algorithm estimates the temporal frequency first, and then this knowledge is used to estimate the interesting modulating phase. There are several well known iterative schemes published before, but our approach has the unique advantage of being very fast. Our new temporal carrier, and phase estimator is capable of obtaining a very good approximation of their temporal carrier in a single iteration. Numerical experiments are given to show the performance of this simple yet powerful self-tuning phase shifting algorithm.

Item Type:Article
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© 2009 Optical Society of America

Uncontrolled Keywords:Error, Optics
Subjects:Sciences > Physics > Optics
ID Code:22806
Deposited On:17 Sep 2013 06:52
Last Modified:07 Feb 2014 10:52

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