38×变倍比宽波段电视镜头光学系统设计

摘要

According to the characteristics of large FOV high zoom ratio wideband optical system, a 38* zoom ratio was designed, the primary and advanced aberrations of large FOV wideband system were balanced by using the mechanical compensation technique of changing root, the h-hv diagram and the aperture diagram analysis. A method using the cam formula to calculate the displacement of compensation group with no parfocality by programming and modify the design value of cam curve in Code V was put forward. This method ensured the parfocality of the high zoom ratio optical system.%针对大视场高变倍比宽波段光学系统的特点,运用换根方式机械补偿光学系统设计技术和h-hp图及孔径图分析法,实现了38×变倍比,解决了大视场宽波段系统的初、高级像差难以平衡的难题,同时提出运用凸轮程序公式编程计算不齐焦段的补偿组实际位移量,对Code V的凸轮曲线设计值进行修正的方法,保证了高变倍比光学系统的齐焦性.