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Phase-shifting interferometry corrupted by white and non-white additive noise.
Servin, M; Quiroga, J A; Estrada, J C.
Afiliação
  • Servin M; Centro de Investigaciones en Óptica A. C., Loma del bosque 115, Col. Lomas del Campestre, León Guanajuato, 37150, Mexico. mservin@cio.mx
Opt Express ; 19(10): 9529-34, 2011 May 09.
Article em En | MEDLINE | ID: mdl-21643210
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.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Opt Express Assunto da revista: OFTALMOLOGIA Ano de publicação: 2011 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Opt Express Assunto da revista: OFTALMOLOGIA Ano de publicação: 2011 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos