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Proceedings Paper

Improving the measuring accuracy of laser autocollimator used over long distance
Author(s): Meirong Zhao; Yuchi Lin; Ping Zhang; Yongyue Qi
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Paper Abstract

The methods of how to improve the measuring accuracy of the autocollimator used over long outside distance are introduced in this paper. Pulse diode laser is adopted as a light source and CCD is used as signal receiver. By the optical design of common-path and the signal processing such as smoothing filtering, interpolating image center, eliminating anomaly data and identifying false points, a higher stability of 2.5” and a better repeatability of 5.6” are achieved in the positioning measurement over ten meters. The principle of auto-collimation, the optical system design, the signal processing and the experimental results are expatiated in this paper.

Paper Details

Date Published: 20 September 2002
PDF: 5 pages
Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471427
Show Author Affiliations
Meirong Zhao, Tianjin Univ. (China)
Yuchi Lin, Tianjin Univ. (China)
Ping Zhang, Tianjin Univ. (China)
Yongyue Qi, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 4927:
Optical Design and Testing
Zhicheng Weng; Jose M. Sasian; Yongtian Wang, Editor(s)

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