5 August 2010 A new efficient laser angle metrology system for maintaining the large radio telescope active reflecting antenna
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Abstract
Radio telescopes with much more larger aperture collect much more signals and therefore sought after by astronomers. The primary reflecting antenna is traditionally segmented and perfectly optically aligned at the central altitude among the whole observation sky area for minimizing the gravitational deformation during operation and passively open-loop maintained at any other altitude. A new laser segmentation sensing and maintaining method based on normal deflection angle measurement is proposed in this paper. After the introduction of the theory, the method is simulated and tested on a special prototype of radio panel segmentation system. It provides real-time monitoring and measurement of the global segmentation status of all panels and is proved to be a high accurate, high efficient and low cost method. Finally several conclusions are reached.
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Yong Zhang, Yong Zhang, Dehua Yang, Dehua Yang, Yeping Li, Yeping Li, Guohua Zhou, Guohua Zhou, Aihua Li, Aihua Li, Guoping Li, Guoping Li, Zhenchao Zhang, Zhenchao Zhang, } "A new efficient laser angle metrology system for maintaining the large radio telescope active reflecting antenna", Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77333M (5 August 2010); doi: 10.1117/12.856747; https://doi.org/10.1117/12.856747
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