Person:
Vargas Balbuena, Javier

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First Name
Javier
Last Name
Vargas Balbuena
URI
https://hdl.handle.net/20.500.14352/75168
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Óptica
Area
Optica
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Author: Estrada, Julio César × Subject: 621.376.4 ×

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