| 离轴四反射镜光学系统设计 |
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| 引用本文： | 丁学专,王欣,兰卫华,刘银年.离轴四反射镜光学系统设计[J].红外与激光工程,2008,37(2):319-321. |
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| 作者姓名： | 丁学专 王欣 兰卫华 刘银年 |
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| 作者单位： | 中国科学院上海技术物理研究所,上海,200083 |
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| 基金项目： | 中国科学院上海技术物理研究所三期创新资助项目 |
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| 摘 要： | 与一般光学系统相比，航空遥感光学系统具有长焦距、大口径、宽波段等特点。因此，广泛使用反射式光学系统。常见的离轴三反系统已不能满足系统小型化、轻量化的要求。介绍了一种无中心遮拦的离轴四反射镜系统，由离轴三反系统改进而成，结构更加紧凑。带一次中间像面的离轴三反系统的中间像位于次镜和三镜之间，为了进一步折叠光路，在中间像面处加入球面反射场镜，从而成为离轴四反。分析了离轴四反的设计步骤，设计了一个焦距为1 200 mm，视场为0.8°×0.8°，相对孔径为F/6的光学系统，系统总长只有300 mm，并达到很好的光学性能，具有长焦距、小尺寸、良好的杂散光抑制能力等特点。
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| 关 键 词： | 遥感光学 离轴四反 反射系统 |
| 文章编号： | 1007-2276(2008)02-0319-03 |
| 收稿时间： | 2007/6/14 |
| 修稿时间： | 2007年6月14日 |
Design of four-mirror reflective anastigmat optic system |
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| DING Xue-zhuan,WANG Xin,LAN Wei-hua,LIU Yin-nian.Design of four-mirror reflective anastigmat optic system[J].Infrared and Laser Engineering,2008,37(2):319-321. |
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| Authors: | DING Xue-zhuan WANG Xin LAN Wei-hua LIU Yin-nian |
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| Affiliation: | Shanghai Institute of Techngical Physics，the Chinese Academy of Sciences , Shanghai 200083，China |
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| Abstract: | Optical system used in aerospace remote sensing usually has long focal length, large aperture, wide spectrum compared with common optical systems. So the reflective optical system is widely used. Three-mirror anastigmat can not meet the requirement of reducing weight and compacting size in some circumstances. A unobstructed four-mirror anastigmat system was proposed, which was modified based on three-mirror anastigmat and had compacter structure. Intermediate image of three-mirror anastigmat having two image surfaces was between secondary and tertiary mirror. In order to fold the optical path, four-mirror anastigmat was designed by adding the spherical reflective mirror at intermediate image. The design of four-mirror anastigmat was analyzed, then a system with effective focal length of 1 200 mm and field of view of 0.8°×0.8° was designed , total length and f-number are 300 mm and F/6,respectively.The system has advantages of long focal length, relative short physical size and excellent ability in restraining stray lights. |
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| Keywords: | Remote sensing optical system Four-mirror-reflective anastigmat Reflect system |
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