The measurement of pointing accuracy of two-dimensional scan mirror

Hui Xing; Chao An; Junru Song; Xuhua He

doi:10.1117/12.2197684

15 October 2015 The measurement of pointing accuracy of two-dimensional scan mirror

Hui Xing, Chao An, Junru Song, Xuhua He

Proceedings Volume 9676, AOPC 2015: Optical Design and Manufacturing Technologies; 967609 (2015) https://doi.org/10.1117/12.2197684
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

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.

Citation Download Citation

Hui Xing, Chao An, Junru Song, and Xuhua He "The measurement of pointing accuracy of two-dimensional scan mirror", Proc. SPIE 9676, AOPC 2015: Optical Design and Manufacturing Technologies, 967609 (15 October 2015); https://doi.org/10.1117/12.2197684

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KEYWORDS

Mirrors

Space mirrors

Data processing

Mathematical modeling

Feedback signals

Optical scanning systems

Virtual colonoscopy

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