Open AccessRobust weighted principal components analysis demodulation algorithm for phase-shifting interferometry
Author(s) -
Javier Vargas,
Shouyu Wang,
José A. GómezPedrero,
J. C. Estrada
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.416344
Subject(s) - demodulation , principal component analysis , computer science , phase (matter) , optics , algorithm , asynchronous communication , interferometry , vibration , physics , artificial intelligence , telecommunications , acoustics , channel (broadcasting) , quantum mechanics
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.