双视场三谱段共孔径光学系统设计

Design of Co-aperture Optical System with Double Field of View and Triple Spectrum

阐述了一种双视场激光、可见光、中波红外三谱段长焦距共孔径光学系统设计方法。系统前端采用离轴三反缩束和视场切换结合的光学结构形式,实现对大口径入射光束的压缩和视场变换,系统后端采取分光镜组将光谱分为三个通道,分别进入激光、可见光、中波红外成像镜组,最终实现各个谱段的组合成像。通过合理设计,各个谱段成像质量优良,满足系统的使用要求。

A design method for a long focal length and co-aperture optical system with double field of view(FOV) and triple spectrum such as laser, visible light and medium-wave infrared band is described. An optical structure combining with off-axis three-mirror beam shrinkage and FOV switching is adopted in the front end of the system, which can realize the compression and FOV translation of large-aperture incident beam. A beam splitter group is adopted in the rear end of the system to divide the spectrum into three channels, which is excited into laser, visible light and medium-wave infrared imaging group respectively. And the combination imaging of each spectral band is realized. Through reasonable design, each spectral band has excellent imaging quality and can meet the requirements of the system.