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Proceedings Paper

Contrast modulation interferometry
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Paper Abstract

A contrast modulating technique for interferometric fringe analysis is introduced. The basic idea of the interferometry is employing an amplitude-stepped reference wavefront in an interferometer to generate contrast-modulated interferograms and evaluating the phase of a test wavefront based on intensities of the interferograms. A general phase evaluation algorithm for the interferometry is derived. As an example of the phase measuring technique, we describe a three-step algorithm and an interferometer used to realize a three-step measurement.

Paper Details

Date Published: 14 June 1995
PDF: 6 pages
Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211879
Show Author Affiliations
Xinkang Tian, Univ. of Tsukuba (Japan)
Masahide Itoh, Univ. of Tsukuba (Japan)
Toyohiko Yatagai, Univ. of Tsukuba (Japan)


Published in SPIE Proceedings Vol. 2544:
Interferometry VII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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