一种含自由曲面的离轴三反光学系统设计  

The design of an off-axis three-mirror optical system with a freeform surface

作　　者：项建胜[1] 潘国庆[1,2] 孟卫华 XIANG Jian-sheng;PAN Guo-qing;MENG Wei-hua(China Airborne Missile Academy,Luoyang 471009,China;2 Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons,Luoyang 471009,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]航空制导武器航空科技重点实验室,河南洛阳471009

出　　处：《激光与红外》2022年第7期1073-1077,共5页Laser & Infrared

摘　　要：设计了一种含自由曲面的离轴三反射镜红外光学系统,光学系统采用三个离轴反射镜,其中第二反射镜采用自由曲面面型,其余反射镜采用非球面面型。光学系统接收口径Φ100 mm,F/#2.5。由于反射元件不产生色差,因此光学系统不存在色差。同时反射元件与支撑结构件采用同一材料,光学系统实现无热化设计。利用自由曲面的非旋转对称性,系统轴外像差得到了很好的校正,从而使光学系统成像质量接近衍射极限。通过合理布局三个反射镜的位置,使光学系统外形尺寸达到了160 mm×110 mm×250 mm。In this paper,an off-axis three-mirror optical system is designed using freeform surface.There are three off-axis mirrors in the optical system,the second mirror adopts freeform surface,and the rest are with asphere surface.The aperture of the optical system isΦ100 mm,and the F/#is 2.5.The system is free of chromatic aberration because of using the reflecting optics.For the optics and mount are made of the same material,the optical system is athermalization.The system off-axis aberrations are well corrected by using the non-rotational symmetry of free-form surface.Thus the optical system is diffraction-limited.By properly layout of the three off-axis mirrors,the dimension of the optical system reaches 160 mm×110 mm×250 mm.

关 键 词：自由曲面 离轴三反 无热化 

分 类 号：TH74[机械工程—光学工程]