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    Method of modifying an dioptric function of an ophthalmic lens surface
    5.
    发明授权
    Method of modifying an dioptric function of an ophthalmic lens surface 有权

    公开(公告)号：US10983365B2

    公开(公告)日：2021-04-20

    申请号：US15310644

    申请日：2015-05-14

    Applicant: Essilor International

    Inventor： Cyril Guilloux ,  Aude Contet

    IPC: G02C7/02 ,  G02C7/06

    Abstract: 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, . . . , Smodn is selected, said modifying surfaces Smod1, . . . , Smodn being associated with a second coordinate system, the modifying surface Smodi comprising a plurality of surface points Pi1, . . . Pij, . . . , Pimi, each surface point Pij having a mean sphere Sph(Pij) and a cylinder Cyl(Pij), n, i, j, mi being integers with n≥1, 1≤i≤n, 1≤j≤mi and mi≥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+Σi=1i=nalphai·Smodi wherein the normalized sphere standard deviation of the normalized sphere values Sph′Smodi of a normalized modifying surface SNmodi is smaller than or equal to 0.2, with: the normalized modifying surface SNmodi corresponding to the modifying surface Smodi to which the best sphero-toric surface has been subtracted, and the normalized sphere values over the normalized modifying surface SNmodi at a point Pij of Smodi having the coordinate (x,y,z) being: Sph S modi ′ ⁡ ( x , y ) = ⌊ SphN S ⁢ ⁢ mod i ⁡ ( x , y ) - min ⁡ ( SphN S ⁢ ⁢ mod i ) ⌋ [ max ⁡ ( SphN S ⁢ ⁢ mod i ) - min ⁡ ( SphN S ⁢ ⁢ mod i ) ] SphNSmod,i(x,y) being the sphere over the normalized modifying surface SNmodi, at the point of SNmodi having the coordinate (x,y), max(SphNSmod,i) being the greatest value of sphere over the normalized modifying surface SNmodi, min(SphNSmod,i) being the smallest value of sphere over the normalized modifying surface SNmodi, alphai being a nonzero weighting coefficient.

    Process For Determining A Pair Of Progressive Ophthalmic Lenses
    10.
    发明申请
    Process For Determining A Pair Of Progressive Ophthalmic Lenses 有权
    确定一对进行性眼科镜片的方法

    公开(公告)号：US20150109575A1

    公开(公告)日：2015-04-23

    申请号：US14399874

    申请日：2013-06-28

    Applicant: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)

    Inventor： Björn Drobe ,  Paulyn Ng Hwei Kien ,  Aude Contet

    IPC: G02C7/02 ,  G02C7/06

    CPC classification number: G02C7/027 ,  G02C7/022 ,  G02C7/063

    Abstract: The visual perception of a lens wearer is not only along the gaze direction, but also has a non-zero transverse extension, which is called perceptual span. Perceptual span is skewed to extend further in the reading direction, i.e., the line portion to be read next relative to the line portion that was just read. A technique is provided that determines a pair of progressive ophthalmic lenses that take such perceptual span into account.

    Abstract translation: 透镜佩戴者的视觉感觉不仅沿着注视方向，而且还具有非零横向延伸，称为感知范围。 感知跨度倾斜以在阅读方向上进一步延伸，即接下来要被读取的线部分相对于刚读取的线部分。 提供了一种技术，其确定了考虑到这种感知跨度的一对渐进式眼科镜片。

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