公开(公告)号：US5861114A

公开(公告)日：1999-01-19

申请号：US829766

申请日：1997-03-31

申请人： Jeffrey H. Roffman ,  Timothy A. Clutterbuck ,  Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

发明人： Jeffrey H. Roffman ,  Timothy A. Clutterbuck ,  Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

IPC分类号： G02C7/04 ,  B29C33/30 ,  B29C33/38 ,  B29C33/56 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00

CPC分类号： B29D11/0048 ,  B29C33/306 ,  B29C33/3842 ,  B29C33/56 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00125 ,  G02C7/04 ,  B29C2045/7343 ,  B29C2045/7362 ,  B29L2011/0016 ,  B29L2031/757 ,  Y10S425/808

摘要： A method of manufacturing complex optical surfaces in soft contact lenses includes a first step of defining the complex optical surfaces with a computer assisted drafting program using a mix of patient determined parameters and selected manufacturing process determined parameters to define a mathematical "meta lens". A machine code data set is then generated to machine a plurality of contact lens mold inserts to define a complex optical surface on each of the inserts. The machining step is conducted with a single point diamond lathe having submicron precision and repeatability. A first and second plurality of intermediate contact lens mold halves are then molded with said contact lens mold inserts to define said complex optical surfaces on said mold halves having micron range transitions between optical surfaces. The complex geometric forms and optical surfaces include bifocal lenses, aspheric lenses, and toric lenses wherein the lenses may include parabolic or elliptical geometry. The first plurality of mold halves is assembled with the second plurality of mold halves with a polymerizable monomer therebetween and polymerized to form a plurality of soft contact lenses having said complex optical surfaces defined thereon.

摘要翻译： 一种在软性隐形眼镜中制造复杂的光学表面的方法包括用计算机辅助牵伸程序定义复杂光学表面的第一步骤，该程序使用患者确定的参数和选定的制造过程确定的参数的混合来定义数学“元镜片”。 然后产生机器代码数据集，以加工多个隐形眼镜模具插入件以在每个插入件上限定复杂的光学表面。 加工步骤采用具有亚微米精度和重复性的单点金刚石车床进行。 然后用所述隐形眼镜模具插入件模制第一和第二多个中间隐形眼镜半模，以在所述半模上限定所述复合光学表面，所述复合光学表面在光学表面之间具有微米范围的转变。 复杂的几何形状和光学表面包括双焦点透镜，非球面透镜和复曲面透镜，其中透镜可以包括抛物线形或椭圆形几何形状。 第一多个半模与第二多个半模与其间聚合的单体组装，并聚合以形成多个具有限定在其上的复合光学表面的软性隐形眼镜。

公开(公告)号：US5702735A

公开(公告)日：1997-12-30

申请号：US536930

申请日：1995-09-29

申请人： Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

发明人： Wallace Anthony Martin ,  Wybren van der Meulen ,  Edgar V. Menezes ,  Kornelis Renkema ,  Robert B. Phillips ,  Victor Lust ,  Jongliang Wu ,  Gerbrand Eshuis

IPC分类号： B29C45/26 ,  B29C33/00 ,  B29C33/04 ,  B29C33/06 ,  B29C33/30 ,  B29C33/38 ,  B29C33/56 ,  B29C45/00 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00 ,  B29K25/00 ,  B29L11/00 ,  G02C7/04

CPC分类号： B29D11/0048 ,  B29C33/306 ,  B29C33/3842 ,  B29C33/56 ,  B29C45/37 ,  B29C45/73 ,  B29D11/00028 ,  B29D11/00125 ,  B29D11/0023 ,  B29C2045/7343 ,  B29C2045/7362 ,  B29L2011/0016 ,  B29L2031/757 ,  Y10S425/808

摘要： An apparatus for molding polystyrene mold halves which are used, for subsequent molding of a soft contact lens. The apparatus is designed with superior heat conduction capacity so as to minimize the molding cycle time, while simultaneously producing uniformly precise and accurate optical quality surfaces. Molten polystyrene is provided via a hot runner system to a plurality of mold cavities. In a specific variation, the convex surface provides the optical quality surface to the concave surface of the mold half produced thereby. The structural element which defines the convex surface includes a hollow cylindrical bushing and a removable power insert mounted therein, which may be changed so that the prescription strength of the contact lens to be formed by the mold may be varied. In a first embodiment, the power insert includes only a convex surface at its operational end. In a second embodiment, the power insert includes an annular flat surface surrounding the convex surface, defining at the junction therebetween a discontinuity of curvature, which imparts a sharp edge to the mold half formed thereby. The power insert may be constructed of pure steel, or alternatively, it may be made of brass, copper chromium, or cobalt-nickel alloyed martensitic steel. The power insert may be coated with a surface layer of nickel phosphor or silicone oxide, or chrome nitride. These layers may be turned to their proper thicknesses and dimensions by diamond cutters, and they may be thermally hardened.

摘要翻译： 用于模制聚苯乙烯半模的装置，用于随后模制软性隐形眼镜。 该设备设计具有优良的导热能力，以便最小化成型周期时间，同时产生均匀精确和准确的光学质量表面。 熔融聚苯乙烯通过热流道系统提供到多个模腔。 在具体的变型中，凸表面将光学质量表面提供给由此产生的半模的凹形表面。 限定凸表面的结构元件包括中空圆柱形衬套和安装在其中的可移除动力插入件，其可以改变，使得由模具形成的隐形眼镜的处方强度可以变化。 在第一实施例中，功率插入件在其操作端仅包括凸面。 在第二实施例中，动力插入件包括围绕凸表面的环形平坦表面，在其间的连接处限定曲率不连续性，其向由此形成的半模赋予尖锐边缘。 动力插入件可以由纯钢构成，或者也可以由黄铜，铜铬或钴镍合金马氏体钢制成。 功率插入件可以涂覆有镍磷光体或氧化硅表面层或氮化铬。 这些层可以通过金刚石切割器转到其合适的厚度和尺寸，并且它们可以被热硬化。