Chinese Optics Letters, 2009, 7 (9): 791, Published Online: Sep. 22, 2009
Importance of tip sensing for active control system of 30-m RIT primary mirror Download: 625次
望远镜 拼接镜面 主动光学 边缘探测 倾斜探测 120.5050 Phase measurement 110.6770 Telescopes 110.1080 Active or adoptive optics 010.7350 Wave-front sensing
Abstract
The active control of 30-m ring interferometric telescope (RIT) needs edge sensing and tip sensing when its primary mirror is composed by trapezoid-shaped segments, and the imaging performance of the RIT is determined by the accuracy of these two detecting approaches. Considering the detecting accuracy available in current segmented telescope active control systems, the effect of these detecting approaches on the surface error of the RIT primary mirror is calculated from the point of error propagation. The corresponding effect on imaging performance (modulation transfer functions (MTFs) and point spread functions (PSFs) at several typical wavelengths) of the RIT primary mirror is also simulated. The results show that tip sensing is very important for increasing the active control quality of the RIT primary mirror under the present techniques.
Yichun Dai, Zhong Liu, Zhenyu Jin. Importance of tip sensing for active control system of 30-m RIT primary mirror[J]. Chinese Optics Letters, 2009, 7(9): 791.