渐进多焦点自由曲面镜片渐进通道优化设计  

Optimization Design of Progressive Corridor of Freeform Progressive Addition Lenses

作　　者：张欣[1] 项华中[1] 马乐飞 郑泽希 陈家璧[3] 王成[1,4] 张大伟[3] 庄松林[3] Zhang Xin;Xiang Huazhong;Ma Lefei;Zheng Zexi;Chen Jiabi;Wang Cheng;Zhang Dawei;Zhuang Songlin(Institute of Medical Optics and Optometry,School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Engineering Research Center of Interventional Medical Device,University of Shanghai for Science and Technology,Shanghai200093,China)

机构地区：[1]上海理工大学健康科学与工程学院医学光学与视光学研究所,上海200093 [2]上海理工大学机械工程学院,上海200093 [3]上海理工大学光电信息与计算机工程学院,上海200093 [4]上海理工大学上海介入医疗器械工程技术研究中心,上海200093

出　　处：《光学学报》2024年第8期208-218,共11页Acta Optica Sinica

基　　金：国家自然科学基金(61605114,52206102)。

摘　　要：渐进多焦点镜片子午线光焦度分布设计直接影响镜片像散分布,是优化设计的核心之一。提出了一种基于累积分布函数的子午线光焦度分布方法;针对渐进通道宽度过窄的问题,对子午线光焦度分布下的不同轮廓线求解对应的矢高进行加权叠加,同时推导新的子午线光焦度分布函数以降低子午线光焦度变化率;仿真及加工了3片镜片。研究结果表明:采用累积分布函数能够设计出满足光学性能要求的渐进镜片;使用矢高叠加扩展了渐进通道的宽度,保持了像散梯度的平滑过渡,且将最大像散分布在镜片鼻翼两侧;新的子午线光焦度分布函数在拓宽渐进通道宽度下会存在像散梯度变化堆积问题,所以需要将光焦度分布和面型等因素结合考虑,并进行优化。本研究方法为渐进多焦点镜片的子午线光焦度优化设计提供了新的理论。Objective A freeform progressive addition lens(PAL)is an optical lens composed of different optical powers,with a curvature that is not constant.It can achieve smooth focusing within a range of focal distances,from distant to near,providing a more natural adjustment for users.This type of lens fully meets both physiological and psychological needs,making it increasingly favored by the middle-aged and presbyopic population.The design of the meridional power distribution plays a crucial role in the astigmatic distribution,the lens'distance and near vision area,the width of the corridor,and the astigmatic gradient,all of which are essential for the wearer?s comfort.The channel width of the lens is closely related to the design of meridional power,contour line distribution,and sagittal height surface profile.Lenses with a wide channel design exhibit lower image distortion,chromatic aberration,and spherical aberration.Moreover,they also feature smoother transition zones,reducing the adaptation period,and offering a more accurate and natural visual experience while minimizing eye fatigue and dizziness.The current design of meridional power does not adequately consider its impact on the overall channel width,and there is a lack of efforts to broaden the channel width.This results in lenses having a relatively high level of astigmatism within a single pupil size.Therefore,we propose a new meridional power distribution based on cumulative distribution functions and analyze the curvature of the function?s impact on the width of the image dispersion center.Additionally,the overall sagittal surface shape overlay and the reduction of meridional power distribution curvature are employed to increase the channel width of progressive addition lenses.Methods To widen the progressive channel of progressive addition lenses,we propose a novel approach.Firstly,a method utilizing the cumulative distribution function is introduced for designing the meridional power distribution,and a comparative analysis is conducted with the commonly u

关 键 词：光学设计 子午线光焦度 加宽渐进通道 渐进多焦点镜片 

分 类 号：TH74[机械工程—光学工程]