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Two-step interferometry by a regularized optical flow algorithm

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Quiroga Mellado, Juan Antonio and Vargas, Javier and Sánchez Sorzano, Carlos Óscar and Estrada, Julio César and Carazo García, José María (2011) Two-step interferometry by a regularized optical flow algorithm. Optics Letters, 36 (17). pp. 3485-3487. ISSN 0146-9592

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Official URL: http://dx.doi.org/10.1364/OL.36.003485


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http://www.opticsinfobase.org/Publisher


Abstract

A two-step phase-shifting method, that can demodulate open-and closed-fringed patterns without local sign ambiguity is presented. The proposed method only requires a constant phase-shift between the two interferograms. This phase-shift does not need to be known and can take any value inside the range (0, 2 π), excluding the singular case where it corresponds to π. The proposed method is based on determining first the fringe direction map by a regularized optical flow algorithm. After that, we apply the spiral phase transform (SPT) to one of the fringe patterns and we determine its quadrature signal using the previously determined direction. The proposed technique has been applied to simulated and experimental interferograms obtaining satisfactory results. A complete MATLAB software package is provided in [http://goo.gl/Snnz7].


Item Type:Article
Additional Information:

© 2011 Optical Society of America.
We would like to acknowledge partial support from the
Spanish Ministry of Science and Innovation through
grants ACI2009-1022, ACI2010-108 and BIO2010-16566.

Uncontrolled Keywords:Phase, Transform
Subjects:Sciences > Physics > Optics
ID Code:22203
Deposited On:07 Jul 2013 16:29
Last Modified:07 Feb 2014 10:43

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