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Proceedings Paper

Real time controller for 37-element low-order solar adaptive optics system at 1m new vacuum solar telescope
Author(s): Lei Zhu; Naiting Gu; Shanqiu Chen; Lanqiang Zhang; Xiaoyun Wang; Xuejun Rao; Mei Li; Changhui Rao
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Paper Abstract

A low-order solar adaptive optics (AO) system had been successfully built and installed at 1m New Vacuum Solar Telescope (NVST) of Full-shine Lake Solar Observatory. The real time controller (RTC) of the AO system, which consists of a correlation tracker and a high-order wavefront correction controller, was developed. In this system, the absolute difference algorithm is used to detect wavefront gradients. A new architecture with field-programmable gate array (FPGA) and digital signal processor (DSP) for the real-time controller based on systolic array and pipeline was designed. The controller was integrated into the AO system and saw the first light on February 24th, 2011, using solar granulation as the beacon. Later, the AO-corrected high resolution sunspots images were obtained using sunspots as the beacon. The observational results show that the contrast and resolution of the solar images are improved evidently after the correction by the AO system. The design of the RTC and the observational results will be presented.

Paper Details

Date Published: 15 October 2012
PDF: 9 pages
Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 84150V (15 October 2012); doi: 10.1117/12.977864
Show Author Affiliations
Lei Zhu, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Naiting Gu, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Shanqiu Chen, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Lanqiang Zhang, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Sciences (China)
Xiaoyun Wang, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Xuejun Rao, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Mei Li, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Changhui Rao, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 8415:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Wenhan Jiang; Myung K. Cho; Fan Wu, Editor(s)

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