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Optics Letters

Optics Letters


  • Vol. 29, Iss. 14 — Jul. 15, 2004
  • pp: 1671–1673

Advanced iterative algorithm for phase extraction of randomly phase-shifted interferograms

Zhaoyang Wang and Bongtae Han  »View Author Affiliations

Optics Letters, Vol. 29, Issue 14, pp. 1671-1673 (2004)

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An advanced random phase-shifting algorithm to extract phase distributions from randomly phase-shifted interferograms is proposed. The algorithm is based on a least-squares iterative procedure, but it copes with the limitation of the existing iterative algorithms by separating a frame-to-frame iteration from a pixel-to-pixel iteration. The algorithm provides stable convergence and accurate phase extraction with as few as three interferograms, even when the phase shifts are completely random. The algorithm is simple, fast, and fully automatic. A computer simulation is conducted to prove the concept.

© 2004 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.2650) Image processing : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Zhaoyang Wang and Bongtae Han, "Advanced iterative algorithm for phase extraction of randomly phase-shifted interferograms," Opt. Lett. 29, 1671-1673 (2004)

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