减小球差的环带透镜设计

根据光线经过折射面后像距和折射面参数之间的关系,将折射面划分为若干同心圆环,各圆环之间沿光轴有一定的轴向间隔。一束平行于光轴的光线入射后,经过不同部分光线的像点相互重叠从而使球差减小。根据上述思想用单透镜构造一个透镜称为环带透镜,然后以环数为2的透镜为例用CODE V进行像差分析。和双胶合透镜比较得出:环带透镜的球差、波像差以及轴上点的弥散斑优于胶合透镜,同时光学传递函数指标提高,接近衍射极限。

Annular lens design for reducing spherical aberration

According to the relationship between the image distance and parameter of refraction surface,the refraction surface is divided into several concentric annulus between which exist certain distance along the optical axis.As a ray of parallel light incident,the different annulus of refraction surface making image position of incident ray overlap to reduce spherical aberration.According to the content mentioned above a lens with two annulus designed and then the aberration analyzed by CODEV.In compared with doublet lens:The spherical aberration、wave front aberration and the spot diagram of the lens are declined Further more MTF become better which are close to diffraction limit.