变焦距光学系统在校正像差的同时还必须满足像面稳定的要求, 补偿或消除由于光学系统中各组元的运动所造成的像相对接收器的偏移。利用动态光学稳像原理, 推导变焦距光学系统的稳像方程, 建立变焦距光学系统的数学模型, 设计光学系统的凸轮曲线。给出了变焦距物镜的动态分析过程, 利用光学设计软件CODE V最终得到了一个变倍倍率为8.15×, 焦距范围为27 mm~220 mm的变焦距物镜, 光学系统F#数为固定值4.2, 视场为4.12°~33.56°。给出了凸轮曲线的计算方法及CODE V成像质量分析结果和MTF等。

Zoom optics system must also meet requirements of image stabilization while correcting aberration, compensating or eliminating offset from receiver due to movement of components in optical system. Based on principle of dynamic optical image stabilization, stabilization equation of zoom optical system is deduced, mathematical model of zoom optical system is established, and cam curve of optical system is designed. Dynamic analysis process of zoom lens is given. Optical design software CODE V is used to finally obtain zoom objective with zoom magnification of 8.15× and focal length range of 27 mm to 220 mm, fixed F# number 4.2 and radial fields 4.12°~33.56°. Calculation method of cam curve, CODE V image quality analysis and MTF are given.