2026-06-26T16:39:36Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/83672023-08-27T19:47:39Zcom_20.500.14352_14col_20.500.14352_15

Robust weighted principal components analysis demodulation algorithm for phase-shifting interferometry 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. 2023-06-17T09:11:37Z 2023-06-17T09:11:37Z 2023-06-17T09:11:37Z 2021-05-14 journal article https://hdl.handle.net/20.500.14352/8367 1094-4087 10.1364/OE.416344 eng PID2019-108850RA-I00 RYC2018-024087-I https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España The Optical Society Of America