基于二元光学的红外成像光谱仪离轴系统设计

对Lyons采用二元光学元件的红外成像光谱仪的设计理论进行了分析，为消除其二元光学元件作为透射式成像元件导致的焦距随波长的变化而变化的缺陷.提出将离轴三反射镜系统与具有二元光学透镜的变焦距系统相结合的新技术方案，并从军事目标的红外热探测的基本要求出发，给出了具体的设计实例.设计结果表明，系统具有设计精巧、结构简单、光能接收率高、消像差特性好、对材料的要求低以及满意的红外焦平面凝视阵列探测器的配准精度和探测精度.

Design of Off-axial Optical System for Binary Optic Infrared Imaging Spectrometer

On the basis of analyzing the design theory of infrared imaging spectrometer based on binary optical element (BOE), in order to eliminate the limitation, which the focal length vary with incidence wavelength in infrared optical system with binary optical component as transparent imaging element, the hybrid refraction/diffraction zoom optical system combining the off-axial three-mirror reflective system is introduced. Furthermore, arming at the principle of infrared hot detection of military objects, the concretely design example of infrared imaging spectrometer was given. The design results show that The system possesses simple structure, high acceptance of light energy, long back-working distance, and better aberration correction. In addition, the system has lower requirements for materials and higher detection precision to infrared focal plane of the stare array detector.