Multi-conjugate adaptive optics (MCAO) has been proved to obtain the high resolution images with a large field of view in solar observation. A solar MCAO experiment system had been successfully developed and tested at the 1-meter New Vacuum Solar Telescope (NVST) of Fuxian Solar Observatory. It consists of two deformable mirrors (DMs), a multidirection Shack-Hartmann wavefront sensor (MD-WFS), and a real-time controller. In order to command the two DMs, five guide regions were selected from the MD-WFS to retrieve a three-dimensional measurement of the turbulent volume based on atmospheric tomography. This system saw the first light in October, 2017, and a series of MCAO-corrected high resolution sunspots images were acquired. In this presentation, the MCAO experiment system is introduced, and the observation results are presented. Furthermore, a new MCAO system based on our proposed MCAO configuration with a high order ground layer adaptive optics and low order high altitude correction will be developed for the NVST as a regularly operating instrument for scientific observations of the sun.
Changhui Rao, Lanqiang Zhang, Lin Kong, Xuejun Rao, Youming Guo, Hua Bao, Libo Zhong, Lei Zhu, Xue'an Ma, Mei Li, Cheng Wang, Xiaojun Zhang, Xinlong Fan, Donghong Chen, Xiaoyun Wang, Zhongyi Feng, and Xianyu Zhang, "Progress on solar multi-conjugate adaptive optics at the New Vacuum Solar Telescope," Proc. SPIE 10703, Adaptive Optics Systems VI, 107030G (Presented at SPIE Astronomical Telescopes + Instrumentation: June 10, 2018; Published: 10 July 2018); https://doi.org/10.1117/12.2310124.
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