14 August 2006 A comparison between 2D phase unwrapping techniques
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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.
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J. Sánchez-Paredes, J. Sánchez-Paredes, J. Castro-Ramos, J. Castro-Ramos, S. Vázquez-Montiel, S. Vázquez-Montiel, "A comparison between 2D phase unwrapping techniques", Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 62921K (14 August 2006); doi: 10.1117/12.681385; https://doi.org/10.1117/12.681385
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