宽光谱微光准直镜方案设计

介绍宽光谱大视场微光准直镜的光学设计和镜组结构方案,侧重叙述大视场微光准直镜的二级光谱校正方法。根据初级像差理论，由半部系统出发，给出了系统的初始结构。通过理论分析和ZEMAX光学设计软件的优化，结合工程应用给出了工作波长为（0.486～0.863）μm、全视场，相对孔径为1∶7.85的镜头设计实例，其二级光谱为0.01mm。该镜头由6块镜片组成，包括一个标准抛物面，在20lp/mm空间频率处MTF值超过0.8。准直镜的像差满足使用要求。

Design of wide spectrum low-light-level collimating lens

The optical design of wide spectrum WFOV LLL collimating lens and the structure of lens set are introduced. The correction of the secondary spectrum of the WFOV LLL collimating lens are described emphatically. According to the primary aberration theory, the initial structure parameters of the system were solved. A design of a lens, whose operating wavelength is (0.486～0.863)μm, full field-of-view angle is and relative aperture is 1∶7.85, is presented on the basis of the theoretical calculation and the optimization of optical design software ZEMAX. The MTF of the lens, which is composed of five spherical lenses and one asphere lens, is better than 0.8 at the spatial frequency of 20lp/mm. The design makes the secondary spectrum of the lens to be at 0.01mm and other aberrations also met the requirement of the application.