Number and Distribution of Fiducial Fibers in a Spectroscopic Survey Telescope  

作　　者：Shi-Peng Duan Zeng-Xiang Zhou Jia-Le Zuo Meng-Tao Li Zhi-Gang Liu Hong-Zhuan Hu Jian-Ping Wang Xiang-Qun Cui Yong Zhang Hao-Tong Zhang 

机构地区：[1]Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,China [2]National Astronomical Observatories/Nanjing Institute of Astronomical Optics&Technology,Chinese Academy of Science,Nanjing 210042,China [3]CAS Key Laboratory of Astronomical Optics&Technology,Nanjing Institute of Astronomical Optics&Technology,Nanjing 210042,China [4]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China

出　　处：《Research in Astronomy and Astrophysics》2022年第2期108-117,共10页天文和天体物理学研究（英文版）

基　　金：Funding for the research was provided by Cui Xiangqun’s Academician Studio;Guoshoujing Telescope(the Large Sky Area Multi-Object Fiber Spectroscopic Telescope,LAMOST)is a National Major Scientific Project built by the Chinese Academy of Sciences;Funding for the project has been provided by the National Development and Reform Commission。

摘　　要：To date,the Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST)has been in operation for 12 yr.To improve the telescope's astronomical observation accuracy,the original open-loop fiber positioning system of LAMOST is in urgent need of upgrading.The upgrade plan is to install several fiber view cameras(FVCs)around primary mirror B to build a closed-loop feedback control system.The FVCs are 20 m from the focal surface.To reduce a series of errors when the cameras detect the positions of the optical fibers,we designed fiducial fibers on the focal surface to be fiducial points for the cameras.Increasing the number of fiducial fibers can improve the detection accuracy of the FVC system,but it will also certainly reduce the number of fiber positioners that can be used for observation.Therefore,the focus of this paper is how to achieve the quantity and distribution that meet the requirements of system detection.In this paper,we introduce the necessity of using fiducial fibers,propose a method for selecting their number and present several methods for assessing the uniformity of their distribution.Finally,we implement particle swarm optimization to find the best distribution of fiducial fibers.

关 键 词：INSTRUMENTATION detectors-techniques image processing-methods data analysis-telescopes 

分 类 号：P111[天文地球—天文学]