title: Improved regularized phase-tracking technique for the processing of squared-grating deflectograms.
abstract: 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.
authors.affiliation: Centro de Investigaciones en Optica, León, Gto, México. jvilla@andromeda.cio.mx
authors.forename: J
authors.initials: J
authors.lastname: Villa
authors.forename: J A
authors.initials: JA
authors.lastname: Quiroga
authors.forename: M
authors.initials: M
authors.lastname: Servín