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Proceedings Paper

A novel interference fringes software counting method
Author(s): Yuanzhao Yang; Benyong Chen; Xiaowei Wu; Dacheng Li
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Paper Abstract

Conventional interference fringes counting methods often process two sinusoidal interference signals with a phase difference of π/2 to realize fringe-counting. But when the signals fluctuate in half a period of the signal, the conventional fringe-counting method sometimes produces direction-distinguishing mistakes, then resulting in counting errors. To address the problem, this paper presents a novel interference fringes counting method that uses software to distinguish the forward or backward direction of interference fringe and to count. This fringe-counting method can accurately distinguish the moving direction induced by the fluctuation of interference fringes, so it has the advantages of exact counting, intelligence and reliability. An experimental setup based on a Michelson interferometer is constructed to demonstrate the utility of this fringe-counting method for displacement measurement, and experimental results with a range of 1036mm is presented.

Paper Details

Date Published: 10 February 2005
PDF: 7 pages
Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); doi: 10.1117/12.574727
Show Author Affiliations
Yuanzhao Yang, Zhejiang Institute of Science and Technology (China)
Benyong Chen, Zhejiang Institute of Science and Technology (China)
Xiaowei Wu, Zhejiang Institute of Science and Technology (China)
Dacheng Li, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5638:
Optical Design and Testing II
Yongtian Wang; Zhicheng Weng; Shenghua Ye; Jose M. Sasian, Editor(s)

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