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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 8 — Apr. 15, 2006
  • pp: 1058–1060

Phase-shifting interferometry in the presence of nonlinear phase steps, harmonics, and noise

Rajesh Langoju, Abhijit Patil, and Pramod Rastogi  »View Author Affiliations


Optics Letters, Vol. 31, Issue 8, pp. 1058-1060 (2006)
http://dx.doi.org/10.1364/OL.31.001058


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Abstract

A phase-shifting piezo device commonly employed in phase-shifting interferometry exhibits a nonlinear response to applied voltage. Hence, a method for estimation of phase distribution in the presence of nonlinear phase steps is presented. The proposed method compensates for the harmonics present in the intensity fringe, allows the use of arbitrary phase-step values between 0 and π rad , and does not impose constraints on the selection of particular phase-step values for minimizing nonlinearity and compensating for the harmonics. The comparison of the proposed method with other well-known benchmarking algorithms shows that our method is highly efficient and also works well in the presence of noise.

© 2006 Optical Society of America

OCIS Codes
(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 12, 2005
Revised Manuscript: January 18, 2006
Manuscript Accepted: January 19, 2006

Citation
Rajesh Langoju, Abhijit Patil, and Pramod Rastogi, "Phase-shifting interferometry in the presence of nonlinear phase steps, harmonics, and noise," Opt. Lett. 31, 1058-1060 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-8-1058

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