Patent ID: 7611242
Filing Date: 2009-11-03
Classification: B24B,G02C

Abstract:
1. A method for centering a semifinished product of a future spectacle lens, namely, a semifinished lens blank, for a spectacle lens on a mounting device, said method comprising the steps of: a.) providing a semifinished lens blank for a spectacle lens, said semifinished lens blank having at least one permanent engraving formed therein at least one respective location lying interiorly of a peripheral edge portion of said semifinished lens blank; b.) generating an image of said at least one engraving, said image representing a relative positional relationship between a current position of said semifinished lens blank with respect to the mounting device and a centered position of said semifinished lens blank with respect to the mounting device, and c.) changing said current positional relationship based on information derived from said image to cause said current position to substantially correspond with said centered position.