Phase unwrapping of subsampled phase-shifted interferograms

Jesus Munoz; Gonzalo Paez; Marija Strojnik

doi:10.1117/12.472230

20 June 2002 Phase unwrapping of subsampled phase-shifted interferograms

Jesus Munoz, Gonzalo Paez, Marija Strojnik

Proceedings Volume 4777, Interferometry XI: Techniques and Analysis; (2002) https://doi.org/10.1117/12.472230
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

We present a novel procedure of phase recovery from undersampled phase-shifted interferograms. First, we use synthetic interferograms to calculate the wrapped phase differences along two orthogonal directions. Second, we unwrap them to recover the true Laplacian of the phase. The final step is to integrate the unwrapped phase differences to give the searched phase. This method may be used with either path independent or path dependent phase unwrapping algorithms. The technique overcomes the sensitivity to noise of previous algorithms when low pass filtering techniques are applied during the calculation of the phase differences and least square methods are employed in the final step of phase integration.

Citation Download Citation

Jesus Munoz, Gonzalo Paez, and Marija Strojnik "Phase unwrapping of subsampled phase-shifted interferograms", Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); https://doi.org/10.1117/12.472230

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