Patent ID: 6641460
Filing Date: 2003-11-04
Classification: B24B

Abstract:
A lens grinding apparatus for grinding a peripheral edge of an eyeglasses lens, comprising:a data input unit which inputs data on a target lens shape of an eyeglasses and layout data for layout of the lens with respect to the target lens shape; a detecting unit which detects a position of an edge corner portion of the lens after a finishing process on the basis of the data inputted by the data input unit; an edge corner-portion processing unit which has a cutting tool for effecting a facet processing on the edge corner portion of the lens subjected to the finishing process, and which processes the lens by relatively moving the cutting tool with respect to a lens holding shaft; a region designating unit which has a display unit for displaying a shape of the lens before the facet processing on the basis of the inputted data, and which designates a region to be subjected to the facet processing using of the displayed lens shape; a selecting unit which selects a facet processing style to be adopted for the designated region of the facet processing from among a plurality of facet processing styles; and a computing unit which obtains processing data on facet processing on the basis of the selected facet processing style and the position of the edge corner portion in the designated facet processing region.