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Title: A new method for phase extraction from a single fringe pattern
Authors: Tay, C.J. 
Quan, C. 
Yang, F.J.
He, X.Y.
Keywords: Fringe analysis
Phase extraction
Speckle interferometry
Issue Date: 15-Sep-2004
Citation: Tay, C.J., Quan, C., Yang, F.J., He, X.Y. (2004-09-15). A new method for phase extraction from a single fringe pattern. Optics Communications 239 (4-6) : 251-258. ScholarBank@NUS Repository.
Abstract: A new technique for phase extraction from a single fringe-pattern image is presented. The algorithm locates the fringe maxima (assigned value 1) and minima (assigned value - 1), and converts the intermediate gray-values into values between - 1 and 1 using linear interpolation. A wrapped phase map is demodulated from a single fringe-pattern and the phase values are computed using an atan mode rather than an atan2 mode. Using the new algorithm wrapped phase values can be efficiently extracted from a single fringe pattern without the need for phase-shifting or carrier fringes. Phase extraction is carried out without the need for assigning fringe orders and distinction for a peak and a trough. The method can be applied to the study of transient events. Experimental results are presented to demonstrate the validity of the method. © 2004 Elsevier B.V. All rights reserved.
Source Title: Optics Communications
ISSN: 00304018
DOI: 10.1016/j.optcom.2004.05.046
Appears in Collections:Staff Publications

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