2026-06-29T07:42:21Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/587912023-08-26T06:26:38Zcom_20.500.14352_14col_20.500.14352_15

Improved regularised phase-tracking technique for the processing of squared-grating deflectograms Quiroga Mellado, Juan Antonio Villa Hernández, José de Jesús Servín Guirado, Manuel 535 Moire Deflectometry Fourier-Transform Fringe-Pattern Interferometer Demodulation Diffraction Image Óptica (Física) 2209.19 Óptica Física © 2000 Optical Society of America. We acknowledge the support of a postdoctoral grant from the Universidad Complutense de Madrid, the “Becas Internacionales Flores-Valles” program, Spain, and the Consejo Nacional de Ciencia y Tecnología (CONACyT), México. We propose a robust procedure based on the regularized phase-tracking (RPT) technique to demodulate squared-grating deflectograms. The use of squared gratings, already reported, lets us multiplex the information of the deflections in two orthogonal directions in a single image, thus avoiding the necessity of rotating the gratings. The good noise-rejection characteristics of the RPT technique are improved by use of a quasi-Newton optimization algorithm and a quality-map-based algorithm for the crystal-growing process. Becas Internacionales Flores-Valles program, Spain Universidad Complutense de Madrid Consejo Nacional de Ciencia y Tecnología (CONACyT), México Depto. de Óptica Fac. de Ciencias Físicas TRUE pub 2023-06-20T18:51:29Z 2023-06-20T18:51:29Z 2000-02-01 journal article https://hdl.handle.net/20.500.14352/58791 0003-6935 10.1364/AO.39.000502 eng open access application/pdf The Optical Society of America