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Opt Lett. 2009 Apr 1;34(7):956-8.

Fringe extrapolation technique based on Fourier transform for interferogram analysis.

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  • 1Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong.


A new fringe extrapolation method for extracting phase from fringe patterns is presented. The proposed method can be used to reduce the errors at the border of the pattern. The simulation was carried out considering the random noise. The result of the simulation shows that this method is effective for precision phase measurement. The experimental result for the fringe extrapolation method is compared with the result of the Fourier transform method without using the extrapolated interferogram patterns.

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