摘要
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 area multi-object fiber spectroscopy telescope can acquire the most stellar image spectrum in the world,and mainly depends on precise positioning of 4000 dual rotational fiber units.In accordance with the requirements of the star-observations and the positioning modes of units.Seven necessary precise positioning parameters are worked-out in complex field environment by a specific process and a series of practicable arithmetics.The arithmetics include optical center of gravity method,a fast and accurate camera calibration method,fitting circle arithmetic based on least squares analysis,coordinate rotation arithmetic and so on.The simulation test and field test of stellar image observation prove that the accuracy of parameters can meet stellar image observation＇s need.The stellar image spectrum acquiring rate of LAMOST telescope is more than 90%.
出处
《光学技术》
CAS
CSCD
北大核心
2010年第2期239-243,共5页
Optical Technique
基金
国家九五重大科学工程(98BJG001)资助项目
关键词
光学测量
LAMOST光纤单元
定位参数
光重心法
摄像机快速标定算法
最小二乘拟合圆算法
optical measurement
LAMOST（Large sky area multi-object fiber spectroscopy telescope） fiber units
positioning parameters
optical center of gravity method
camera calibration method
fitting circle arithmetic based on least squares analysis
