14 June 1995 Contrast modulation interferometry
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xinkang Tian, Masahide Itoh, Toyohiko Yatagai, "Contrast modulation interferometry", Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211879; https://doi.org/10.1117/12.211879
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KEYWORDS
Modulation

Interferometry

Wavefronts

Modulators

Interferometers

Phase measurement

Algorithm development

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