20 September 2002 Research on improving the measuring accuracy of laser autocollimator used over long distance
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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.
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Meirong Zhao, Meirong Zhao, Yuchi Lin, Yuchi Lin, Ping Zhang, Ping Zhang, Yongyue Qi, 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); doi: 10.1117/12.471427; https://doi.org/10.1117/12.471427
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