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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 2632–2638

A self-tuning phase-shifting algorithm for interferometry

Julio C. Estrada, Manuel Servin, and Juan. A. Quiroga  »View Author Affiliations

Optics Express, Vol. 18, Issue 3, pp. 2632-2638 (2010)

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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.

© 2010 Optical Society of America

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: September 1, 2009
Revised Manuscript: November 5, 2009
Manuscript Accepted: November 5, 2009
Published: January 25, 2010

Julio C. Estrada, Manuel Servin, and Juan A. Quiroga, "A self-tuning phase-shifting algorithm for interferometry," Opt. Express 18, 2632-2638 (2010)

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Fig. 1. Table 1. Fig. 2.

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