Chirp estimation in phase-shifting interferometry
Optics Letters, Vol. 31, Issue 13, pp. 1982-1984 (2006)
http://dx.doi.org/10.1364/OL.31.001982
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Abstract
We propose a new approach for estimating the phase in the presence of a nonlinear response of a phase-shifting device: a piezoelectric transducer (PZT). The method is complemented well by the high resolution and the maximum likelihood estimation techniques in the estimation of the phase step and the nonlinear coefficient. The advantage of the proposed method is that it can be extended to the extraction of multiple phases in configurations involving multiple PZTs in the presence of nonlinearity. Symmetricity in the phase steps is not required in this method. Hence hysteresis of the PZT does not have any influence on the accuracy of the phase estimation. The effectiveness of the method is shown by experimental results.
© 2006 Optical Society of America
OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: February 15, 2006
Revised Manuscript: April 3, 2006
Manuscript Accepted: April 8, 2006
Citation
Rajesh Langoju, Abhijit Patil, and Pramod Rastogi, "Chirp estimation in phase-shifting interferometry," Opt. Lett. 31, 1982-1984 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-13-1982
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