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Proceedings Paper

Quantitative surface evaluation by matching experimental and simulated ronchigram images
Author(s): Juana Rosaura Kantún Montiel; Alberto Cordero Dávila; Jorge González García
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Paper Abstract

To estimate qualitatively the surface errors with Ronchi test, the experimental and simulated ronchigrams are compared. Recently surface errors have been obtained quantitatively matching the intersection point coordinates of ronchigrama fringes with x-axis . In this case, gaussian fit must be done for each fringe, and interference orders are used in Malacara algorithm for the simulations. In order to evaluate surface errors, we added an error function in simulations, described with cubic splines, to the sagitta function of the ideal surface. We used the vectorial transversal aberration formula and a ruling with cosinusoidal transmittance, because these rulings reproduce better experimental ronchigram fringe profiles. Several error functions are tried until the whole experimental ronchigrama image is reproduced. The optimization process was done using genetic algorithms.

Paper Details

Date Published: 25 October 2011
PDF: 6 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801127 (25 October 2011); doi: 10.1117/12.903409
Show Author Affiliations
Juana Rosaura Kantún Montiel, Benemérita Univ. Autónoma de Puebla (Mexico)
Alberto Cordero Dávila, Benemérita Univ. Autónoma de Puebla (Mexico)
Jorge González García, Univ. Tecnológica de la Mixteca (Mexico)

Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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