Robust weighted principal components analysis demodulation algorithm for phase-shifting interferometry



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Vargas Balbuena, Javier and Wang, Shuoyu and Gómez Pedrero, José Antonio and Estrada, Julio César (2021) Robust weighted principal components analysis demodulation algorithm for phase-shifting interferometry. Optics express, 29 (11). ISSN 1094-4087

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We present an asynchronous phase-shifting demodulation approach based on the principal component analysis demodulation method that is robust to typical problems as turbulence, vibrations, and temporal instabilities of the optical setup. The method brings together a two-step and a phase-shifting asynchronous demodulation method to share their benefits while reducing their intrinsic limitations. Thus, the proposed approach is based on a two-fold process. First, the modulating phase is estimated from a two-step demodulation approach. Second, this information is used to compute weights to each phase-shifted pattern of the interferogram sequence, which are used in a novel weighted principal component demodulation approach. The proposed technique has been tested with simulated and real interferograms affected by turbulence and vibrations providing very satisfactory results in challenging cases.

Item Type:Article
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Received: 4 Dec 2020 / Revised: 3 Feb 2021 / Accepted: 10 Feb 2021 / Published: 14 May 2021.
© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Funding. Ministerio de Ciencia, Innovación y Universidades (PID2019-108850RA-I00, Ramón y Cajal 2018 program (RYC2018-024087-I)).

Uncontrolled Keywords:Gram-Schmidt orthonormalization; Extraction; Interferograms
Subjects:Sciences > Physics > Optics
ID Code:67524
Deposited On:31 Aug 2021 12:36
Last Modified:06 Sep 2021 09:18

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