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Improved regularised phase-tracking technique for the processing of squared-grating deflectograms

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Quiroga Mellado, Juan Antonio and Villa Hernández, José de Jesús and Servín Guirado, Manuel (2000) Improved regularised phase-tracking technique for the processing of squared-grating deflectograms. Applied Optics, 39 (4). pp. 502-508. ISSN 0003-6935

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Official URL: http://dx.doi.org/10.1364/AO.39.000502


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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.


Item Type:Article
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© 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.

Uncontrolled Keywords:Moire Deflectometry, Fourier-Transform, Fringe-Pattern, Interferometer, Demodulation, Diffraction, Image
Subjects:Sciences > Physics > Optics
ID Code:23211
Deposited On:19 Oct 2013 16:19
Last Modified:07 Feb 2014 10:58

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