中文摘要：

设计了工作于8～12μm波段的折／衍混合消热差红外反摄远系统．该系统全视场为14°，有效焦距为100mm，后工作距为113mm，F／#2．0．系统采用锗和硒化锌两种材料，为三片镜结构．引入二元面和高次非球面，使结构简化，重量减轻，提高了成像质量．系统在－40℃～100℃的温度范围内性能稳定，适用于像元尺寸40μm，像元数640×480的现代非致冷式面阵探测器．大视场、长后工作距以及超宽工作温度范围，决定了系统可满足军用和民用领域的多种需求．

英文摘要：

An infrared diffractive-refractive hybrid inversed telephoto system in 8- 12μm with 14° field of view is designed. The effective focal length and back working distance of the system are respectively 100 mm and 113 mm,while the F number is 2.0. The system which has only three lenses contains two negative germanium lenses and one positive zinc selenide lens. The binary surface and high order aspheric surface are used to simplify the configuration, lighten the weight and improve the image quality. The working temperature rang is from --40℃ to 100℃. The system is applicable to the uncooled staring focal plane array（FPA） detector which has a format of 640 × 480 and pixel pitch of 40μm. Particularly,the wide filed of view, the long back working distance and the high image quality in --40 ℃- 100℃ ,all of which make the system satisfy the necessary specifications both in martial and civil applications.