Phase difference determination by fringe pattern matching |
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Authors: | Z Wang PJ Bryanston-Cross DJ Whitehouse |
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Institution: | The authors are in the Department of Engineering, University of Warwick, Coventry CV47AL, UK |
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Abstract: | A method of phase difference determination in interferometry is presented. In this method, the phase difference between two interferograms is determined by fringe pattern matching with subpixel accuracy. The signal-to-noise ratio is significantly improved due to the region-based fringe pattern matching and its effect of averaging noise. The experiment shows that this method is useful for the determination of phase difference between two equi-spaced fringe patterns, and it has the advantages of high precision of measurement and high resistance to noise. |
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Keywords: | interferometry phase difference determination fringe pattern matching |
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