Novel approaches to automated reduction of phase-shifted interferograms

Vance A. Deason; Gordon D. Lassahn

doi:10.1117/12.135340

1 January 1992 Novel approaches to automated reduction of phase-shifted interferograms

Vance A. Deason, Gordon D. Lassahn

Proceedings Volume 1553, Laser Interferometry IV: Computer-Aided Interferometry; (1992) https://doi.org/10.1117/12.135340
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

In an effort to reduce the hardware requirements for phase shifting interferometry, we have developed two approaches to estimating the amount of individual phase shift between interferograms. This is intended to make possible phase shifting interferometry with unknown and varying phase shifts. This will reduce the cost of phase shifters by eliminating the need for precision calibrated devices. The first method of estimating the phase shift involves beam shuttering and requires a special hardware modification of the interferometer, while the second is a purely software implementation. Both methods are relatively inexpensive to install and use.

Citation Download Citation

Vance A. Deason and Gordon D. Lassahn "Novel approaches to automated reduction of phase-shifted interferograms", Proc. SPIE 1553, Laser Interferometry IV: Computer-Aided Interferometry, (1 January 1992); https://doi.org/10.1117/12.135340

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