21 July 2014 A composite tracking sensor with high accuracy and large dynamic range
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Abstract
A composite tracking sensor, in which a reflect mirror with a central hole is inserted in the imaging systems so that the reflective beam beyond the hole is directed to the large dynamic range detector and the beam passing the hole is reimaged by a lens to enter the high sensitivity detector, can be used for tip-tilt detecting with high accuracy and large dynamic range simultaneously. A composite tracking sensor prototype based on the multi-anode photo-multiplier tubes (MAPMT) is developed for 1.8 meter astronomical telescope in the Gaomeigu astronomical observation station. In this paper, the principle of the composite tracking sensor is introduced. The prototype is described in detailed and the experimental results are presented. The results show that this composite tracking sensor can reach the tracking accuracy of 0.2 μrad and higher within the dynamic range of 870 μrad.
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Xiaoyu Ma, Kai Wei, Wenjia Zheng, Changhui Rao, "A composite tracking sensor with high accuracy and large dynamic range", Proc. SPIE 9148, Adaptive Optics Systems IV, 914855 (21 July 2014); doi: 10.1117/12.2054592; https://doi.org/10.1117/12.2054592
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