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Phase unwrapping through demodulation by use of the regularized phase-tracking technique.
Servin, M; Cuevas, F J; Malacara, D; Marroquin, J L; Rodriguez-Vera, R.
Afiliação
  • Servin M; Centro de Investigaciones en Optica A C, Apartado Postal 1-948, 37150 Leon, Gto, Mexico.
Appl Opt ; 38(10): 1934-41, 1999 Apr 01.
Article em En | MEDLINE | ID: mdl-18319748
Most interferogram demodulation techniques give the detected phase wrapped owing to the arctangent function involved in the final step of the demodulation process. To obtain a continuous detected phase, an unwrapping process must be performed. Here we propose a phase-unwrapping technique based on a regularized phase-tracking (RPT) system. Phase unwrapping is achieved in two steps. First, we obtain two phase-shifted fringe patterns from the demodulated wrapped phase (the sine and the cosine), then demodulate them by using the RPT technique. In the RPT technique the unwrapping process is achieved simultaneously with the demodulation process so that the final goal of unwrapping is therefore achieved. The RPT method for unwrapping the phase is compared with the technique of least-squares integration of wrapped phase differences to outline the substantial noise robustness of the RPT technique.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Appl Opt Ano de publicação: 1999 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Appl Opt Ano de publicação: 1999 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos