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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 10 — May. 9, 2011
  • pp: 9529–9534

Phase-shifting interferometry corrupted by white and non-white additive noise

M. Servin, J. A. Quiroga, and J. C. Estrada  »View Author Affiliations


Optics Express, Vol. 19, Issue 10, pp. 9529-9534 (2011)
http://dx.doi.org/10.1364/OE.19.009529


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Abstract

The standard tool to estimate the phase of a sequence of phase-shifted interferograms is the Phase Shifting Algorithm (PSA). The performance of PSAs to a sequence of interferograms corrupted by non-white additive noise has not been reported before. In this paper we use the Frequency Transfer Function (FTF) of a PSA to generalize previous white additive noise analysis to non-white additive noisy interferograms. That is, we find the ensemble average and the variance of the estimated phase in a general PSA when interferograms corrupted by non-white additive noise are available. Moreover, for the special case of additive white-noise, and using the Parseval’s theorem, we show (for the first time in the PSA literature) a useful relationship of the PSA’s noise robustness; in terms of its FTF spectrum, and in terms of its coefficients. In other words, we find the PSA’s estimated phase variance, in the spectral space as well as in the PSA’s coefficients space.

© 2011 OSA

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 16, 2011
Revised Manuscript: April 18, 2011
Manuscript Accepted: April 21, 2011
Published: May 2, 2011

Citation
M. Servin, J. A. Quiroga, and J. C. Estrada, "Phase-shifting interferometry corrupted by white and non-white additive noise," Opt. Express 19, 9529-9534 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-10-9529


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References

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