Progressive multifocal lens based on sine curve and design method thereof

The invention discloses a progressive multifocal lens based on a sine curve and a design method thereof. According to the technical scheme, a sine curve function is constructed for meridian design, and the positions of a high beam area and a low beam area and the length of a channel can be freely controlled by controlling translation and scaling factors in the function; a special logarithmic function is constructed, the distribution of the diopter on the lens is defined, the design steps of the lens are simplified, the effects of reducing the calculated amount and saving the design time are achieved, meanwhile, low astigmatism of the two sides is guaranteed, and the high-quality lens design method is provided for personalized progressive lenses. 本发明公开了一种基于正弦曲线的渐进多焦点镜片及其设计方法。本发明技术方案是：构造一个正弦曲线函数进行子午线设计，通过控制函数中的平移及缩放因子，可自由地控制远光区、近光区的位置及通道的长；构建的特殊对数函数，对镜片上的曲光度分布进行定义，镜片的设计步骤得到了简化，具有减少计算量，节约设计时间的效果，同时，还保证了二侧的低散光，为个性化渐进片提供了优质的镜片设计方法。