Real time controller for 37-element low-order solar adaptive optics system at 1m new vacuum solar telescope

Lei Zhu; Naiting Gu; Shanqiu Chen; Lanqiang Zhang; Xiaoyun Wang; Xuejun Rao; Mei Li; Changhui Rao

doi:10.1117/12.977864

15 October 2012 Real time controller for 37-element low-order solar adaptive optics system at 1m new vacuum solar telescope

Lei Zhu, Naiting Gu, Shanqiu Chen, Lanqiang Zhang, Xiaoyun Wang, Xuejun Rao, Mei Li, Changhui Rao

Author Affiliations +

Proceedings Volume 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 84150V (2012) https://doi.org/10.1117/12.977864
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Lei Zhu, Naiting Gu, Shanqiu Chen, Lanqiang Zhang, Xiaoyun Wang, Xuejun Rao, Mei Li, and Changhui Rao "Real time controller for 37-element low-order solar adaptive optics system at 1m new vacuum solar telescope", Proc. SPIE 8415, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 84150V (15 October 2012); https://doi.org/10.1117/12.977864

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