2012•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Adaptive optical system based on deformable secondary mirror on 1.8-meter telescope
Changhui Rao, Ang Zhang, Xinlong Fan, Youming Guo, Kai Wei, Chunlin Guan, Xuejun Zhang, Cheng Li, Luchun Zhou, Shanqiu Chen, Hao Xian, Wenli Ma, Yuntao Cheng, Hong Zhou, Yudong Zhang
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Abstract
In 2009, A 127-element adaptive system had been manufactured and installed at the Coude room of the 1.8-meter telescope at the Gaomeigu site of Yunnan Astronomical Observatory, Chinese Academy of Sciences. A set of new adaptive optical system based on a 73-element deformable secondary mirror is being developed and will be integrated into the 1.8-meter telescope. The 73-element deformable secondary mirror with convex reflecting surface is designed to be compatible with the Cassegrain focus of the 1.8-meter telescope. Comparing with the AO system of Coude focus, the AO system on the deformable secondary mirror adopts much less reflections and consequently restrains the thermal noise and increases the energy transmitting to the system. The design and simulation results of this system will be described in this paper. Furthermore, the preliminary test result of the deformable secondary mirror in the lab is also presented.