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Optics Letters

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  • Vol. 29, Iss. 2 — Jan. 15, 2004
  • pp: 183–185

Generalized phase-shifting interferometry with arbitrary unknown phase steps for diffraction objects

L. Z. Cai, Q. Liu, and X. L. Yang  »View Author Affiliations


Optics Letters, Vol. 29, Issue 2, pp. 183-185 (2004)
http://dx.doi.org/10.1364/OL.29.000183


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Abstract

A general method of extracting the arbitrary unknown and unequal phase steps in phase-shift interferometry from interferograms recorded on the diffraction field of an object and then reconstructing the object wave front digitally with our derived formulas is proposed. The phase steps are first calculated based on the statistical nature of the diffraction field and are further improved by an iterative approach. This method is simple, highly accurate, and usable for any frame number N (N≥3) and for both smooth and diffusing objects, as is verified by a series of computer simulations.

© 2004 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(100.2000) Image processing : Digital image processing
(100.3010) Image processing : Image reconstruction techniques
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Citation
L. Z. Cai, Q. Liu, and X. L. Yang, "Generalized phase-shifting interferometry with arbitrary unknown phase steps for diffraction objects," Opt. Lett. 29, 183-185 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-2-183


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