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    • 54. 发明公开
    • A METHOD OF MODIFYING AN DIOPTRIC FUNCTION OF AN OPHTHALMIC LENS SURFACE
    • VERFAHREN ZUR MODIFIZIERUNG EINER DIOPTRISCHEN FUNKTION EINER OPHTHALMISCHENLINSENOBERFLÄCHE
    • EP3143457A1
    • 2017-03-22
    • EP15724576.2
    • 2015-05-14
    • Essilor International (Compagnie Générale d'Optique)
    • GUILLOUX, CyrilCONTET, Aude
    • G02C7/02G02C7/06
    • G02C7/028G02C7/027G02C7/061
    • A method implemented by computer means of modifying an initial dioptric function of an initial ophthalmic lens surface, for manufacturing an ophthalmic lens, the method comprising: - an initial surface providing step (S1), during which an initial surface Sini associated with a first coordinate system is provided, said initial surface Sini comprising a plurality of surface points P1, each surface point P1 having a mean sphere Sph(P1) and a cylinder Cyl(P1), said initial surface Sini providing said initial dioptric function, - a modifying surface selection step (S2), during which a number n of nonzero modifying surfaces Smod1,…, Smod n is selected, said modifying surfaces Smod1,…, Smod n being associated with a second coordinate system, the modifying surface Smod 1 comprising a plurality of surface points P i1, …P i j, …, P i mi, each surface point P i j having a mean sphere Sph(P i j ) and a cylinder Cyl(P i j ), n, i, j, m i being integers with n ≥ 1, 1 ≤ i ≤ n, 1 ≤ j ≤ m i and m i ≥ 1, - an orientation step (S3), during which the relative position and orientation of the first coordinate system and the second coordinate system is determined, a combining step (S4), during which the initial surface Sini and the n modifying surfaces are combined to obtain a functionalized ophthalmic lens surface according to the expression : Sfunc = Sini +∑i=n i=1 alphai.S modi. wherein the normalized sphere standard deviation of the normalized sphere values Sph' Smodi of a normalized modifying surface SNmod i is smaller than or equal to 0.2, with : the normalized modifying surface SNmod i corresponding to the modifying surface Smod i to which the best sphero-toric surface has been subtracted, and the normalized sphere values over the normalized modifying surface SNmod i at a point P ij of Smod i having the coordinate (x,y,z) being : (I) Sph N Smod,i (x,y) being the sphere over the normalized modifying surface SNmod i, at the point of SNmod i having the coordinate (x,y), 30 max(Sph N Smod,i ) being the greatest value of sphere over the normalized modifying surface SNmod i, min(Sph N Smod,i ) being the smallest value of sphere over the normalized modifying surface SN mod i, alpha i being a nonzero weighting coefficient.
    • 一种通过修改初始眼科镜片表面的初始屈光度函数实现的方法,用于制造眼科镜片,所述方法包括: - 初始表面提供步骤(S1),其中与第一坐标相关联的初始表面Sini 系统,所述初始表面Sini包括多个表面点P1,每个表面点P1具有平均球体Sph(P1)和气缸Cyl(P1),所述初始表面Sini提供所述初始屈光度函数, - 修改表面 选择步骤(S2),其中选择n个非零修改表面Smod1,...,Smod n,所述修改表面Smod1,...,Smod n与第二坐标系相关联,修改表面Smod 1包括多个 表面点P i1,... P ij,...,P i mi,每个表面点P ij具有平均球体Sph(P ij)和气缸Cyl(P ij),n,i,j,mi是n≥ 1,1≤i≤n,1≤j mi和mi≥1, - 定位步骤(S3),在该取向步骤(S3)期间确定第一坐标系和第二坐标系的相对位置和取向;组合步骤(S4),其中初始表面Sini和n 将修饰表面组合以获得功能化的眼科镜片表面,其根据以下表达式:Sfunc = Sini +Σi= ni = 1 alphai.S modi。 其中归一化修正表面SNmod i的归一化球体值Sph'Smodi的标准化球面标准偏差小于或等于0.2,其中:对应于最佳球形 - 已经减去复曲面,并且具有坐标(x,y,z)的Smod i的点P ij处的归一化修正表面SNmod i上的归一化球体值为:(I)Sph N Smod,i(x,y )是在归一化修正表面SNmod i上的球体,在SNmod i具有坐标(x,y)的点上,30max(Sph N Smod,i)是归一化修正表面SNmod i上球体的最大值, min(Sph N Smod,i)是归一化修正表面SN mod i上的球体的最小值,αi是非零加权系数。