Displacement sensor with nonsymmetrical double gratings

Haibao Lu; Juliang Cao; Shaojing Su; Guilin Tang

doi:10.1117/12.385601

9 May 2000 Displacement sensor with nonsymmetrical double gratings

Haibao Lu, Juliang Cao, Shaojing Su, Guilin Tang

Proceedings Volume 4077, International Conference on Sensors and Control Techniques (ICSC 2000); (2000) https://doi.org/10.1117/12.385601
Event: International Conference on Sensors and Control Techniques (ICSC2000), 2000, Wuhan, China

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.

Citation Download Citation

Haibao Lu, Juliang Cao, Shaojing Su, and Guilin Tang "Displacement sensor with nonsymmetrical double gratings", Proc. SPIE 4077, International Conference on Sensors and Control Techniques (ICSC 2000), (9 May 2000); https://doi.org/10.1117/12.385601

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