2 m环形地基太阳望远镜系统杂散光分析  

The stray light analysis of 2 m ring ground-based solar telescope

作　　者：潘森 许孝芳[1] 李金鹏 毕勇 李精博 杨晓寒 PAN Sen;XU Xiaofang;LI Jingpeng;BI Yong;LI Jingbo;YANG Xiaohan(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]中科院南京天文仪器有限公司,江苏南京210042

出　　处：《光学仪器》2020年第3期65-70,共6页Optical Instruments

基　　金：江苏省自然科学基金(BK20160154)。

摘　　要：为分析2 m环形地基太阳望远镜系统的杂散光,对该系统光机结构进行杂散光仿真模拟。基于Tracepro软件建立2 m环形地基太阳望远镜系统的光机模型,对光机组件进行光线追迹,着重分析了系统主镜、次镜、光阑面、主镜室前表面以及桁架等组件一次散射,使用点源透过率计算方法得到系统点源透过率(PST)曲线。结果表明,当离轴角θ≥5′时,系统PST≤1.728×10^−4,2 m环形地基太阳望远镜可以较好地满足对太阳磁场高分辨率成像的需求,系统观测不会受到杂散光的影响。In order to analyze the stray light performance of the 2 m ring ground-based solar telescope,the stray light simulation of the optical-mechanical structure of the system was performed.The 2 m ring ground-based solar telescope model was established in Tracepro.The primary scattering of the system was taken into account,which including primary mirror,secondary mirror,diaphragm,front surface of the primary mirror cell and truss.The point sources transmittance(PST)was obtained by using point source transmittance calculation method.The results show that when the off-axis angleθ≥5′,the system PST is less than 1.728×10^−4,which turns out the 2 m ring ground-based solar telescope meets the requirements for high-resolution imaging of the solar magnetic field,and will not be subject to the stray light.

关 键 词：地基太阳望远镜 杂散光 点源透过率(PST) Tracepro软件仿真 

分 类 号：TB133[机械工程—光学工程]