Improving the measuring accuracy of laser autocollimator used over long distance

Meirong Zhao; Yuchi Lin; Ping Zhang; Yongyue Qi

doi:10.1117/12.471427

20 September 2002 Research on improving the measuring accuracy of laser autocollimator used over long distance

Meirong Zhao, Yuchi Lin, Ping Zhang, Yongyue Qi

Proceedings Volume 4927, Optical Design and Testing; (2002) https://doi.org/10.1117/12.471427
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Meirong Zhao, Yuchi Lin, Ping Zhang, and Yongyue Qi "Research on improving the measuring accuracy of laser autocollimator used over long distance", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); https://doi.org/10.1117/12.471427

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