摘要
从眼镜片用顶焦度的定义出发,探讨了渐进加光镜片的原理和结构,介绍了子午线设计的原则和方法。选择镜片周边的加光曲线形式,通过在边界条件下对子午加光曲线做变换,确定镜片表面的屈光度分布,给出了基于加光曲线变换的设计方法。与传统方法相比,不仅在形式上统一了渐进加光镜片的屈光度分布,而且还为设计者提供了更自由灵活的选择。利用曲面微分几何原理获得镜片表面面型矢高,计算屈光度和像散分布。通过实例设计表明,此方法可以设计出所需渐进特征的加光镜片。
Starting with the vertex definition of spectacle lens,the principle and structure of the progressive addition lens,the rule and method of meridian designing are introduced.The type of addition power curve in the periphery area is chose,and then,the surface power distribution of the lens is given by the method based on transformation of meridian addition power law under the boundary conditions.To compare with the traditional methods,this one has the advantages not only in the unified power distribution form of the progressive addition lens,but also with more freedom and flexibility choice for the designer.The lens surface sag,power and astigmatism distribution can be obtained according to differential geometry of curving surface.It is proved by an embodiment that the required progressive addition lens can be designed with this method.
出处
《光学技术》
CAS
CSCD
北大核心
2012年第2期146-151,共6页
Optical Technique
基金
上海市重点学科建设项目(S30502)
2010年教育部"大学生创新实验计划"(101026223)
关键词
视光学
渐进加光镜片
子午线
加光曲线
visual optics
progressive addition lenses
meridian
addition power curve
