| LAMOST光纤单元定位参数研究 |
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| 引用本文： | 刘志刚,江晖,谢志林.LAMOST光纤单元定位参数研究[J].光学技术,2010,36(2). |
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| 作者姓名： | 刘志刚 江晖 谢志林 |
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| 作者单位： | 中国科学技术大学,精密机械与精密仪器系,安徽,合肥,230027 |
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| 基金项目： | 国家九五重大科学工程(98BJG001)资助项目 |
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| 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。
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| 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 |
Research on positioning parameters of LAMOST fiber units |
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| LIU Zhi-gang,JIANG Hui,XIE Zhi-lin.Research on positioning parameters of LAMOST fiber units[J].Optical Technique,2010,36(2). |
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| Authors: | LIU Zhi-gang JIANG Hui XIE Zhi-lin |
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| Institution: | Department of Precision Machinery and Precision Instrumentation;University of Science and Technology of China;Hefei 230027;Anhui;China |
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| Abstract: | 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 acc... |
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| Keywords: | 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 |
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