LAMOST望远镜的大气色散校正  

The Correction of Atmospheric Dispersion in LAMOST

作　　者：刘根荣[1] 袁祥岩[1] 

机构地区：[1]中国科学院国家天文台/南京天文光学技术研究所,南京210042

出　　处：《天文学报》2005年第3期331-342,共12页Acta Astronomica Sinica

摘　　要：大气折射与大气色散会影响大视场多目标光纤光谱观测的质量和效率.一个焦距为20m,焦比为F5、位于北纬40.4°的LAMOST望远镜在中天和中天前后0.75小时产生的色散值,用模拟计算得到结果,并用数值计算得到验证.对校正色散可能用的几种色散棱镜进行了计算分析比较,确定了色散棱镜的型式,并分析了色散棱镜的二级光谱以及色散棱镜在望远镜跟踪过程中的残留色散,及色散棱镜的安装误差.Atmospheric refraction and dispersion affect the observation quality and efficiency of Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST). The atmospheric dispersion of LAMOST, mounted at north latitude 40.4°, with focal length 20m and F5, at transit and transit±0.75h is calculated by both ZEMAX simulation and numerical calculation. Some types of dispersion prisms used to correct the atmospheric dispersion in LAMOST are calculated and analyzed in this paper. By comparison, the type to be applied is determined. The secondary spectrum of dispersion prism and remnant dispersions created in tracking are analyzed. The position error of dispersion prism in assembly is analyzed too.

关 键 词：望远镜 大气效应 色散棱镜 

分 类 号：P111[天文地球—天文学]