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Proceedings Paper

Displacement sensor with nonsymmetrical double gratings
Author(s): Haibao Lu; Juliang Cao; Shaojing Su; Guilin Tang
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Paper Abstract

The basic principle and characteristics of displacement sensor with nonsymmetrical double gratings (DSNDG) are briefly described in the paper firstly. Besides the wide range and high resolution, very fine optical subdivision can be attained with the technique of DSNDG, which can largely expand the measurement range without decreasing the resolution. Then DSNDG is proved with the theories of Doppler effect. And the experimental research is done in the end. In the experimental research, some experimental phenomena are analyzed. The reasons and conditions for the formation of moire fringe are introduced. The effect of optical configuration, such as the angle of incidence and position of the two gratings, on the moire fringe is discussed. Then the factors affecting the moire fringe contrast and the methods to improve the fringe contrast are analyzed.

Paper Details

Date Published: 9 May 2000
PDF: 4 pages
Proc. SPIE 4077, International Conference on Sensors and Control Techniques (ICSC 2000), (9 May 2000); doi: 10.1117/12.385601
Show Author Affiliations
Haibao Lu, National Univ. of Defense Technology (China)
Juliang Cao, National Univ. of Defense Technology (China)
Shaojing Su, National Univ. of Defense Technology (China)
Guilin Tang, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 4077:
International Conference on Sensors and Control Techniques (ICSC 2000)

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