变焦系统中可调光焦度器件初值分析

Analysis initial value of zoom system with variable focal power lens

为了实现变焦系统中可调光焦度器件初值分析,对可调光焦度器件的变焦系统进行了像差分析。根据变焦系统的光束孔径角和成像物高等特征参数确定系统初级像差,并以像差独立性的原理分析共轴可调光焦度器件变焦系统。采用薄透镜像差理论分析形状参数与变焦系统放大率的关系,应用球差和彗差最小值对可调光焦度变焦系统初值进行确定。结果表明,采用变焦系统放大率与形状参数的计算方法可满足变焦系统中可调光焦度器件初值的确定要求,并具有简单、快速、可靠等特点,为进一步计算机校正变焦系统像差提供了参考。

In order to realize the analysis of the initial value of the variable focal power lens(VFPLs)for the zoom system,the aberration of the VFPLs for the zoom system is analyzed.The primary aberration of the zoom system is determined according to the aperture angle of the beam and the height of the object.The relation between the shape parameters and the magnification of the zoom system is analyzed by using the theory of thin transparent image difference,and the initial value of the zoom system is determined by using the minimum value of spherical aberration and coma.The results show that the calculation equation of the magnification and shape parameters of the zoom system can reach the requirements of determining the initial value of the VFPLs in the zoom system,and it is simple,fast and reliable,which provides a reference for further computer correction of the aberration of the zoom system.