1 m红外太阳望远镜镜面位置误差致光轴偏移分析

董雪岩; 许方宇; 陈骥; 罗永芳

红外技术, 2016, 38 (10): 870, 网络出版: 2016-11-15

1 m红外太阳望远镜镜面位置误差致光轴偏移分析

Analysis on Optic Axis Deviation Induced by Lens Position Disorder of 1 m New Vacuum Solar Telescope

论文大纲

董雪岩 ^1,2,*许方宇 ¹陈骥 ³罗永芳 ³

作者单位

¹ 云南天文台天文技术实验室, 云南昆明 650216

² 中国科学院大学, 北京 100049

³ 云南北方驰宏光电有限公司, 云南昆明 650217

摘要

定量分析了云南天文台 1m新真空红外太阳望远镜(简称 NVST), 副镜失调误差对主光轴偏移的影响。以格里高利双反射系统为例, 在综合像质达到衍射极限的前提下, 分析了副镜的离心和倾斜误差分别对光轴带来的影响, 然后分析了两种因素综合作用下, NVST光轴的可能的偏移量。模拟结果表明当副镜离心和倾斜单独存在且分别小于 0.121 mm和 0.01.时, 像质可达衍射限。当副镜离心与倾斜同时存在且耦合, 离心 4.5 mm倾斜 0.392.时, 像质仍可达到衍射限, 光轴已偏移 0.392., 远大于望远镜设计视场 0.083.。因此光轴稳定性是大型望远镜装调的一项必检指标。

Abstract

Taking the 1 m new vacuum solar telescope(NVST) of the Yunnan Observatories as an example, this paper analyzed quantitatively the maladjustment of the optical imaging components(such as the primary mirror and the secondary mirror) on the optical axis deviation. The influence of the decentration or tilt of the secondary mirror on the optical axis and the field of view is discussed and the allowable deviation of the optical axis of the NVST is analyzed under the combination of the two factors. We noticed that decentration and tilt can sometimes compensate each other, mitigating damage of telescope imaging quality. When the limit offset reaches 4.5 mm and 0.392., the optical axis offset is 0.392., which is far larger than the design field of view of telescope. It is concluded that the optical axis stability is a necessary index to test the results of large telescope alignment.

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董雪岩, 许方宇, 陈骥, 罗永芳. 1 m红外太阳望远镜镜面位置误差致光轴偏移分析[J]. 红外技术, 2016, 38(10): 870. DONG Xueyan, XU Fangyu, CHEN Ji, LUO Yongfang. Analysis on Optic Axis Deviation Induced by Lens Position Disorder of 1 m New Vacuum Solar Telescope[J]. Infrared Technology, 2016, 38(10): 870.

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