多光轴渐进变焦眼镜设计

Design for multi-optical-axis progressive addition spectacle lenses

提出了一种多光轴渐进多焦点镜片设计方法,选取人眼观察使用的实际光瞳为眼镜通光口径内的小光瞳对应的元透镜设计。在子午面上,镜片视远点与视近点之间的光焦度由8次多项式确定。在光瞳面内,包含远视区和邻近视近区光瞳的光焦度分别取双曲线类型和抛物线类型分布。鉴于元透镜都是小像差系统,把元透镜看作是中心厚度已知的薄透镜,采用高斯光学方法设计面型,不必进行光路追迹和像差平衡。实验结果表明,多光轴渐进多焦点镜片屈光度和像散符合理论设计分布要求。为渐进多焦点镜片设计提供了一种新的途径。

Considering the habitual conduct of using eyes, a new design method for progressive addition spectacle lenses based on multi-optical-axis system is proposed. Along the vertical meridian, the power of the lens changes from the distance area to the near area is determined by eight-order polynomial. The pupil＇s power of including the distance area and the near area is distributed by the type of hyperbola and parabola in the pupil plane,respectively. Based on the small aberration system of spectacle lens. The whole design idea is modeling mathematical surface by Gauss formula. There is no need to be processed byusing ray tracing and aberration balance. Experimental results indicate that the distribution of diopter and astigmatism of multi-optical-axis progressive addition spectacle lenses conforms with the requirements of the design theory. A new type progressive addition lens design method is provided.