A sodium guide star adaptive optics system for the 1.8 meter telescope

摘要

We are developing a sodium guide star adaptive optics system for the 1.8 meter telescope, which consists of threemain parts: (i) 20W microsecond pulsed laser system, (ii) Φ200mm laser launch telescope and (iii) 37-elements adaptiveoptics system. All of these three parts are mounted on the 1.8 meter telescope which is located in Gaomeigu site ofYunnan Astronomical Observatory, Chinese Academy of Sciences. The pulsed laser system and the launch telescope arerotated with the azimuthal base of the telescope. A miniaturized 37-elements low-order adaptive optics system includinga 37-elelment deformable mirror and a 6x6 array Hartmann-Shack wavefront sensor is mounted at the Cassegrain focustaking account of the pulsed laser mode. A separate tip-tilt correction loop is also integrated into the system. This paperdescribes the details of this system, the simulation result and the test result in the lab. After the indoor test, the wholesystem will be shipped to 1.8 meter telescope. The latest commissioning status and results is presented also in this paper.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.