介绍渐进多焦点眼用镜片的构造,论述镜片的设计思想,阐述渐进多焦点眼用镜片子午线设计的基本原理,构建子午线多项式,给出子午线设计需满足的准则。在子午线设计的基础上,设计渐进多焦点眼用镜片等屈光度轮廓线,确定镜片面形,并求出镜片平均球面度与像散。比较3种不同子午线设计的渐进多焦点眼用镜片,并进行实际加工与检测。研究结果表明,子午线设计是渐进多焦点眼用镜片设计的关键之一,不同的子午线屈光度分布,对应的渐进多焦点眼用镜片的球面度、像散以及畸变等差别较大。依据实际设计与检测结果,给出适用于不同个性化需求的渐进多焦点眼用镜片子午线屈光度分布的规律。

The construction of progressive addition lenses is introduced,and the designing idea of lenses is also illustrated.The principle of designing meridional power laws for progressive addition lenses is expounded based on polynomial,and the criterion of designing meridional power laws is given out.On the basis of designing meridional power laws,the isopower contours are designed in order to determine the surfaces of progressive addition lenses.The mean surface power and the constant surface astigmatism are calculated.Three kinds of progressive addition lenses which are designed based on different meridional power laws are compared,and the lenses are manufactured and tested.It is shown that designing meridional power law is an important aspect of designing progressive addition lenses.There is much difference of the surface power,the surface astigmatism and the distortion corresponding to different meridional power laws.The rules of meridional power laws are given out to satisfy with individual demands according to the practical design and the testing results of progressive addition lenses.