Direct demodulation of closed-fringe interferograms based on active contours



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Quiroga Mellado, Juan Antonio and Vargas Balbuena, Javier and Belenguer Dávila, Tomás (2010) Direct demodulation of closed-fringe interferograms based on active contours. Optics Letters, 35 (21). pp. 3550-3552. ISSN 0146-9592

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We demonstrate a method to directly demodulate closed-fringe interferograms using a kind of active contour called a snake. This method can be used to demodulate a single closed-fringe interferogram when its background illumination and/or contrast terms have a spatial frequency similar to the spatial frequency of the equivalent normalized interferogram. Among other cases, this problematic usually appears in interferometry when spurious reflection appears in the interferogram. In these situations, typical Fourier-based methods are of no help. We show a set of simulations and experimental results that prove the effectiveness of the proposed method.

Item Type:Article
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© 2010 Optical Society of America

Uncontrolled Keywords:Spurious Reflection, Phase, Interferometry, Quadrature
Subjects:Sciences > Physics > Optics
ID Code:22767
Deposited On:13 Sep 2013 07:35
Last Modified:28 Apr 2022 18:00

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