An updated 37-element low-order solar adaptive optics system for 1-m new vacuum solar telescope at Full-Shine Lake Solar Observatory

摘要

A low-order solar adaptive optics (AO) system, which consists of a fine tracking loop with a tip/tilt mirror and acorrelation tracker, and a high-order correction loop with a 37-element deformable mirror, a correlating Shack-Hartmannwavefront sensor and a high-order wavefront correction controller, had been successfully developed and installed at 1-mNew Vacuum Solar Telescope of Full-shine Lake (also called Fuxian Lake) Solar Observatory. This system is an updateof the 37-element solar AO system designed for the 26-cm Solar Fine Structure Telescope at Yunnan AstronomicalObservatory in 2009. The arrangement of subapertures of the Shack-Hartmann wavefront sensor was changed fromsquare to hexagon to achieve better compensation performance. Moreover, the imaging channel of the updated systemwas designed to observe the Sun at 710nm and 1555nm simultaneously. The AO system was integrated into the solartelescope in 2011, and AO-corrected high resolution sunspots and granulation images were obtained. The observationalresults show that the contrast and resolution of the solar images are improved evidently after the correction by the AOsystem.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.