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Proceedings Paper

Fourier transform evaluation of interference patterns: demodulation and sign ambiguity
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Paper Abstract

The Fourier-transform method determines the interference phase distribution from an interference pattern. If evaluating only a single pattern, the sign remains unknown. Methods for interactive sign correction and for determination of the sign by two phase shifted interferograms are presented. For demodulation of the wrapped phase, a path independent algorithm is described.

Paper Details

Date Published: 1 January 1992
PDF: 11 pages
Proc. SPIE 1553, Laser Interferometry IV: Computer-Aided Interferometry, (1 January 1992); doi: 10.1117/12.135312
Show Author Affiliations
Thomas M. Kreis, BIAS (Germany)
Werner P. O. Jueptner, BIAS (Germany)


Published in SPIE Proceedings Vol. 1553:
Laser Interferometry IV: Computer-Aided Interferometry
Ryszard J. Pryputniewicz, Editor(s)

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