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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 12 — Apr. 20, 2009
  • pp: 2401–2409

Steerable spatial phase shifting applied to single-image closed-fringe interferograms

Juan Antonio Quiroga, Manuel Servin, Julio Cesar Estrada, and Jose Antonio Gomez-Pedrero  »View Author Affiliations


Applied Optics, Vol. 48, Issue 12, pp. 2401-2409 (2009)
http://dx.doi.org/10.1364/AO.48.002401


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Abstract

It is well known that spatial phase shifting interferometry (SPSI) may be used to demodulate two- dimensional (2D) spatial-carrier interferograms. In these cases the application of SPSI is straightforward because the modulating phase is a monotonic increasing function of space. However, this is not true when we apply SPSI to demodulate a single-image interferogram containing closed fringes. This is because using these algorithms, one would obtain a wrongly demodulated monotonic phase all over the 2D space. We present a technique to overcome this drawback and to allow any SPSI algorithm to be used as a single-image fringe pattern demodulator containing closed fringes. We make use of the 2D spatial orientation direction of the fringes to steer (orient) the one-dimensional SPSI algorithm in order to correctly demodulate the nonmonotonic 2D phase all over the interferogram.

© 2009 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.5070) Image processing : Phase retrieval
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: December 22, 2008
Revised Manuscript: March 19, 2009
Manuscript Accepted: March 19, 2009
Published: April 16, 2009

Citation
Juan Antonio Quiroga, Manuel Servin, Julio Cesar Estrada, and Jose Antonio Gomez-Pedrero, "Steerable spatial phase shifting applied to single-image closed-fringe interferograms," Appl. Opt. 48, 2401-2409 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-12-2401


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