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大天区多目标光纤光谱天文望远镜LAMOST是世界上光谱获取量最大的望远镜,4000个双回转光纤单元的精确定位是关键因素之一。根据对星像观测的要求以及单元的定位方式,确立了所需的7个定位参数,研究了在复杂现场环境下获取定位参数的具体流程和可行性算法,包括光重心法、摄像机快速标定算法、基于最小二乘拟合圆算法、空间坐标旋转算法等。通过模拟星像观测仿真测试和现场星像试观测证明,定位参数精度能很好地满足观测需求。目前LAMOST望远镜观测光谱获取率已达到90%以上。
Large Sky Multi-Target Optical Spectrum Astronomical Telescope LAMOST is the world’s largest telescope of spectral gain and the precise positioning of 4,000 dual-turn fiber units is one of the key factors. According to the requirements of astronomical observation and the location of the unit, the required seven positioning parameters are established, and the specific processes and feasibility algorithms for obtaining the positioning parameters under complex field conditions are studied, including the optical gravity center method, the camera rapid calibration algorithm , Based on the least squares fitting circle algorithm, space coordinate rotation algorithm. Through the simulated asteroid observation and simulation test and field star test, it is proved that the precision of the positioning parameter can well meet the observation requirement. The current LAMOST telescope observation spectrum acquisition rate has reached more than 90%.