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Proceedings Paper

A comparison between 2D phase unwrapping techniques
Author(s): J. Sánchez-Paredes; J. Castro-Ramos; S. Vázquez-Montiel
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Paper Abstract

There are many optical techniques to evaluate and calculate the shape of any concave surface, including lateral shear or phase lock interferometry tests. In this work we employ a Twymann Green interferometer to obtain several interferograms of any mirror under test, and by using a computer program and a piezo electric device, we apply the phase shifting technique to obtain several interferograms and with them we obtain the phase by applying several phase unwrapping methods, also we realize an experimental comparison between the methods employed to unwrap the phase. Finally results concerned with the advantages or disadvantages of the studied methods are discussed.

Paper Details

Date Published: 14 August 2006
PDF: 11 pages
Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 62921K (14 August 2006); doi: 10.1117/12.681385
Show Author Affiliations
J. Sánchez-Paredes, Instituto Nacional de Astrofísica Óptica y Electrónica (Mexico)
J. Castro-Ramos, Instituto Nacional de Astrofísica Óptica y Electrónica (Mexico)
S. Vázquez-Montiel, Instituto Nacional de Astrofísica Óptica y Electrónica (Mexico)

Published in SPIE Proceedings Vol. 6292:
Interferometry XIII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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