Patent ID: 8979618
Filing Date: 2015-03-17
Classification: B24B,B24D,Y10S

Abstract:
1. A polishing tool for processing an optical surface of a spectacle lens, having a carrier body that is rotated during processing about a central axis and a polishing film, an elastic layer being arranged between said polishing film and said carrier body for elastically pressing the polishing film against the optical surface of the spectacle lens during processing, wherein said polishing film has an edge region, wherein said edge region is delimited inwards in a radial direction by a base circle, wherein a plurality of edge elements extend outwards in said radial direction from said base circle, wherein a surface of said polishing film, which surface is active during processing, extends from said central axis and decreases in size in said edge region of said polishing film outwards in said radial direction, wherein said surface of said polishing film, which surface is active during processing, decreases continuously in size down to zero in said edge region of said polishing film outwards in said radial direction, wherein a contour of each edge element ends radially outwards at a singular end point, wherein said edge region is delimited outwards in said radical direction by a tip circle, said singular end point of at least one edge element lying on said tip circle, wherein none of said singular end points lies beyond said tip circle, and further wherein a difference between a radius of said tip circle and a radius of said base circle is approximately from 5 to 20% of said radius of said tip circle.