Patent ID: 7757373
Filing Date: 2010-07-20
Classification: B23B,B23C,B24B,Y10T

Abstract:
1. A method for machining pairwise symmetrical, optically effective surfaces of a right side spectacle lens and a left side spectacle lens by chip-removing, wherein said surfaces are rotated about a first axis and are displaced along said axis, a chip-removing tool being provided, said tool being positioned and being adapted to be fed in, such that a cutting edge of said tool is guided over each said surface along a spiralled path and along an elevation function given by a shape of said respective spectacle lens, when each said spectacle lens is rotated about said first axis, wherein for machining the right side spectacle lens and the left side spectacle lens, said right side spectacle lens is rotated about said first axis in a first rotational direction, and said left side spectacle lens is rotated about said first axis in a second rotational direction opposite said first rotational direction.