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Proceedings Paper

Novel adaptive phase-shifting interferometry
Author(s): Weirui Zhao; Genrui Cao; Junqi Ma
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Paper Abstract

An adaptive phase-shifting interferometry, insensitive to the disturbance of constant term of phase perturbations induced by environmental vibration and air turbulence is introduced. Where high frequency intensity modulation of laser beam and phase lock-in as well as the closed loop control techniques are used. The wobble of interference fringes can be compensated, and sequentially be locked at arbitrarily chosen phases for phase-shifting testing. Comparing with other similar techniques, here the depth of signal modulation is not limited by the magnitude of optical path difference (OPD) and the fringe contrast is not reduced by the modulation, hence a high SNR can be obtained. The experimental results and conclusions are presented.

Paper Details

Date Published: 6 October 2000
PDF: 5 pages
Proc. SPIE 4231, Advanced Optical Manufacturing and Testing Technology 2000, (6 October 2000); doi: 10.1117/12.402828
Show Author Affiliations
Weirui Zhao, Beijing Institute of Technology (China)
Genrui Cao, Beijing Institute of Technology (China)
Junqi Ma, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 4231:
Advanced Optical Manufacturing and Testing Technology 2000
Li Yang; Harvey M. Pollicove; Qiming Xin; James C. Wyant, Editor(s)

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