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Proceedings Paper

The measurement of pointing accuracy of two-dimensional scan mirror
Author(s): Hui Xing; Chao An; Junru Song; Xuhua He
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Paper Abstract

The observation accuracy of space camera targeted on ground objects is directly affected by the pointing deviation of the two dimensional scan mirror. A plane model of the scan mirror’s normal trajectory is established when scan mirror is rotating along the rolling axis while the pitching axis remains still. The pointing accuracy of scan mirror cross the track direction is measured with the plane model. A cone model of the scan mirror’s normal trajectory is established when scan mirror is rotating along the pitching axis while the rolling axis remains still. The pointing accuracy of scan mirror along the track direction is measured with the plane model. The nonorthogonality of shafting of the rolling axis and the pitching axis is measured with the two models. Data processing results are feedback to pointing controller to correct the input signal of resolver, until the pointing accuracy of scan mirror meets the requirement. The experimental results indicate that the models of measuring the pointing accuracy of scan mirror are accurate and the data processing algorithm is feasible. The testing precision reached 10-3 second.

Paper Details

Date Published: 15 October 2015
PDF: 11 pages
Proc. SPIE 9676, AOPC 2015: Optical Design and Manufacturing Technologies, 967609 (15 October 2015); doi: 10.1117/12.2197684
Show Author Affiliations
Hui Xing, Beijing Institute of Space Mechanics and Electricity (China)
Chao An, Beijing Institute of Space Mechanics and Electricity (China)
Junru Song, Beijing Institute of Space Mechanics and Electricity (China)
Xuhua He, Beijing Institute of Space Mechanics and Electricity (China)


Published in SPIE Proceedings Vol. 9676:
AOPC 2015: Optical Design and Manufacturing Technologies
Lin Li; Kevin P. Thompson; Ligong Zheng, Editor(s)

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