从宽波段范围的消色差条件出发，列表对比了常用光学玻璃材料在可见光、近红外和短波红外三个宽波段范围的色散特性，指出光学玻璃材料在不同波段色散特性的差异，据此论述了一种宽波段光学系统设计过程中各光学玻璃材料的使用与替换方法，并结合复消色差的方法，完成了一个宽波段大相对孔径光学系统的设计，该系统F数为1.4、焦距为70 mm、全视场为6.3°×8.1°、波长范围为0.4~1.7 μm。除球罩外，所述系统共采用了4种普通光学玻璃材料，透镜总数为9片、总长为110 mm，在-45 ℃~60 ℃温度范围内，均具有较好的成像质量和公差特性。

Table comparison of dispersive character is made between some frequently used optical glasses in visible (Vis), near-iinfrared (NIR) and short-wave infrared (SWIR). Through comparison, different dispersive characters of these optical glasses in different waveband arepointed out. Then, a kind of using and interchanging method of these materials especially in optical design process is discussed. Based on this method and apochromatic model, a wideband (Vis-SWIR) fast F-number optical system under the requirements of F/1.4, focal length of 70 mm, whole field of view of 6.3°×8.1°, waveband of 0.4~1.7 μm is designed with optical passive athermalization technology. Except the sphere dome, the optical system, which uses 4 kinds of optical glass, consists of 9 lenses, total length of 110 mm, has good image quality and tolerance character at -45 ℃~60 ℃.