光学仪器, 2016, 38 (4): 331, 网络出版: 2016-10-24
内渐进镜片加工中的过切判据的研究
Research of the causes of over-cutting on the process of interior progressive addition lenses
内渐进镜片 自由曲面 加工 过切 曲面曲率半径 interior progressive addition lenses free-form surface process over-cutting surface curvature radius
摘要
针对内渐进镜片在加工过程中出现过切的情况,提出一种判断方法。该方法使用双三次样条曲面参数方程计算自由曲面各点曲率半径最小值,通过三维软件对曲面曲率半径进行计算,研究镜片在机床上实现加工的判据。由分析和计算表明,若曲面加工范围内存在某些点的曲率半径小于给定的机床刀具半径,则机床无法加工内渐进镜片的曲面。
Abstract
Some progressive addition lenses are over cut during the processing.This paper proposes a method.It obtains the least value of the surface curvature radius of the free surface by calculating the parametric equation of the double three spline surface.The least value of the surface curvature radius is calculated by a 3D software.We study the reason of lenses why it can be processed.The result indicates that if the surface curvature radius of some points is less than the radius of machine tool,the surface can not be processed.
张佳康, 陈家璧, 魏叶飞, 项华中, 朱天凤. 内渐进镜片加工中的过切判据的研究[J]. 光学仪器, 2016, 38(4): 331. ZHANG Jiakang, CHEN Jiabi, WEI Yefei, XIANG Huazhong, ZHU Tianfeng. Research of the causes of over-cutting on the process of interior progressive addition lenses[J]. Optical Instruments, 2016, 38(4): 331.
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