First generation solar adaptive optics system for 1-m New Vacuum Solar Telescope at Fuxian Solar Observatory
First generation solar adaptive optics system for 1-m New Vacuum Solar Telescope at Fuxian Solar Observatory作者机构：Key Laboratory on Adaptive Optics Chinese Academy of Sciences Laboratory on Adaptive Optics Institute of Optics and Electronics Chinese Academy of Sciences Yunnan Astronomical Observatories Chinese Academy of Sciences
出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)
年 卷 期：2016年第16卷第2期
页 面：19-26页
核心收录：
学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学]
基 金：funded by the National Natural Science Foundation of China(Grant No.11178004)
主 题：adaptive optics high angular resolution sunspots granulation
摘 要：The first generation solar adaptive optics （AO） system, which consists of a fine tracking loop with a tip-tilt mirror （TTM） and a correlation tracker, and a high-order correction loop with a 37-element deformable mirror （DM）, a correlating Shack-Hartmann （SH） wavefront sensor （WFS） based on the ab- solute difference algorithm and a real time controller （RTC）, has been developed and installed at the 1-m New Vacuum Solar Telescope （NVST） that is part of Fuxian Solar Observatory （FSO）. Compared with the 37-element solar AO system developed for the 26-cm Solar Fine Structure Telescope, administered by Yunnan Astronomical Observatories, this AO system has two updates： one is the subaperture arrangement of the WFS changed from square to hexagon; the other is the high speed camera of the WFS and the corre- sponding real time controller. The WFS can be operated at a frame rate of 2100 Hz and the error correction bandwidth can exceed 100 Hz. After AO correction, the averaged residual image motion and the averaged RMS wavefront error are reduced to 0.06＂ and 45 nm, respectively. The results of on-sky testing obser- vations demonstrate better contrast and finer structures of the images taken with AO than those without AO.
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