大口径折反式三组元连续变焦距光学系统设计.pdfVIP

第44卷第10期 红外与激光工程 2015年10月 Vol.44No.10 InfraredandLaserEngineering Oct.2015 大口径折反式三组元连续变焦距光学系统设计 李宏壮袁赵勇志袁马鑫雪袁于树海袁殷丽梅 (中国科学院长春光学精密机械与物理研究所袁吉林 长春 130033) 摘 要院采用一种新的结构形式对口径1.2 m尧焦距2~6 m尧相对孔径 1/1.67~1/5的可见/近红外波段 连续变焦距望远镜进行了设计遥为适应目前地基大口径望远镜总体结构形式的需要袁前端主系统采用 Cassegrain反射式结构袁后端采用三组元机械补偿变倍形式袁使结构更加简洁遥 在高斯光学计算尧像差 分析基础上对各组元初始结构选择袁并进行整体优化遥 设计结果各项性能指标均满足要求袁且结构紧 凑尧补偿曲线平滑袁表明这种结构形式是大口径连续变焦距望远镜一种较好的光学解决方案遥 关键词院折反式曰 连续变焦距曰 光学设计 中图分类号院TH751 文献标志码院A 文章编号院1007-2276(2015)10-3037-06 Design oflarge aperturecatadioptricthree groupcontinuous zoom opticalsystem Li Hongzhuang, Zhao Yongzhi, Ma Xinxue, Yu Shuhai, Yin Limei (Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China) Abstract: A new structure is adopted to design a visible and near infrared large aperture telescope with 1.2 m diameter, 2-6 m focal length, and 1/1.67-1/5 relative aperture. For meeting the requirement of modern ground-base large telescope, the front primary system using Cassegrain reflective form. And the back part uses three group mechanical compensation zoom refractive system, which makes the structure more simple and compact. Based on Gauss optics calculation and analysis of aberration, the initial form of each group was determined, and the whole system was optimized subsequently. The design results show that all of the optical indexes satisfy the command of the system, and the structure was compact, the compensation curve was smooth. The design demonstrates that the form is an effective optical structure for large aperture continuous zoom telescope. Keywords:catadioptirc; continuous zoom system; optical design