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

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Quiroga Mellado, Juan Antonio and Servín Guirado, Manuel and Estrada, Julio César (2011) Phase-shifting interferometry corrupted by white and non-white additive noise. Optics Express, 19 (10). pp. 9529-9534. ISSN 1094-4087

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Official URL: 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.


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© The Optical Society of America.
We appreciate the support of the Mexican Science and Technology Council CONACYT.

Uncontrolled Keywords:Algorithms
Subjects:Sciences > Physics > Optics
ID Code:22247
Deposited On:07 Jul 2013 17:43
Last Modified:07 Feb 2014 10:43

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