针对超广角照相物镜的设计, 利用ZEMAX光学设计软件, 由各种操作数对镜头的基本参数和外形尺寸进行限制, 通过选择适当后组, 利用三级逆伽利略系统串接的方法优化设计了前组, 前后组组合在一起后经过进一步优化设计, 得到一款在可见光波段内、焦距为6.2 mm、全视场角为100°、F数为2.1的照相物镜。该镜头由16片球面透镜组成, 设计结果表明, 全视场镜头的最大畸变量的绝对值小于3.5% ,最大场曲小于0.05 mm, 全视场MTF值在空间频率50 lp/mm时高于0.7, 达到衍射极限。

For the problem about the design of ultra wide-angle photographic objective, an ultra wide-angle photographic objective was designed with ZEMAX optical software. The design was carried out by limiting the basic parameters and dimensions of lens with various operations and by selecting the appropriate rear group. The former group structure was designed by using the three inverse Galileo systems. The former group and the rear group were mixed together and the overall initial structure was further optimizd. The optical system is composed of 16 pieces of spherical lenses applicable within the visible light region. The main optical parameters are as follows: the focal length is 6.2 mm, the full field of view(FOV) is 100°, the F number is 2.1. From the result we can see that the absolute value of maximum distortion of FOV lens is less than 3.5%, the maximum field curve is less than 0.05 mm, the modulation transfer function (MTF) of the whole field of view at 50 lp/mm is greater than 0.7, approaching to the diffraction limit.