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    • 9. 发明授权
    • Programmable smooth junctions on lenses
    • 透镜上可编程的光滑接头
    • US5650838A
    • 1997-07-22
    • US433739
    • 1995-05-04
    • Jeffrey H. RoffmanTimothy A. ClutterbuckYulin X. Lewis
    • Jeffrey H. RoffmanTimothy A. ClutterbuckYulin X. Lewis
    • G02C7/02G02C7/04G05B19/4097
    • G02C7/02G02C7/04
    • Programmable smooth junctions are provided for lenses and molds therefor, particularly for toric lens designs, which enable a numerically controlled (NC) machine to be programmed to machine smooth junctions or transitions between adjacent regions of a lens which have different thicknesses or radii of curvature. First and second mathematical functions f(a) and f(b) are defined which specify the curves of first and second segments of a lens surface. The slope dy/dx is derived of the first and second mathematical functions f(a) and f(b) at the transition between the first and second segments of the lens surface. A mathematical function is defined which describes a desired transition between the first and second segments of the lens. The first and second mathematical functions f(a) and f(b), the derived slopes dy/dx of the first and second mathematical functions f(a) and f(b), and the mathematical function describing the desired transition are then utilized to program a numerically controlled machine to machine the first and second segments of the lens surface and the desired transition between the first and second segments.
    • 提供可编程的光滑接头用于其透镜和模具,特别是对于复曲面透镜设计,其使数字控制(NC)机器能够被编程为加工具有不同厚度或曲率半径的透镜的相邻区域之间的光滑接合或过渡。 定义了第一和第二数学函数f(a)和f(b),其规定了透镜表面的第一和第二段的曲线。 斜率dy / dx由透镜表面的第一和第二段之间的过渡处的第一和第二数学函数f(a)和f(b)导出。 定义了描述透镜的第一和第二段之间期望的转变的数学函数。 第一和第二数学函数f(a)和f(b),第一和第二数学函数f(a)和f(b)的导出斜率dy / dx以及描述所需转变的数学函数 对数控机床进行编程,以加工透镜表面的第一和第二段以及第一和第二段之间的期望过渡。