The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2005
Filed:
Apr. 14, 2003
Laurent Guillermin, Paris, FR;
Sylvaine Millet, Soisy Sous Montmorency, FR;
Laurent Guillermin, Paris, FR;
Sylvaine Millet, Soisy Sous Montmorency, FR;
Essilor International (Compagnie Generale D'Optique), Charenton le Pont, FR;
Abstract
Process for grinding the rim of an ophthalmic lens that has two opposite faces, following a predetermined contour corresponding to that of a ring of a spectacle frame in which the lens is intended to be mounted, the contour being delimited on each of the faces by an edge, and the process includes a plotting stage in which the three-dimensional shape of at least one of the edges is plotted. In the plotting stage, the edge is scanned on the illuminated face of lens using a light beam forming a light spot on the face, the successive positions of an image of the light spot are plotted simultaneously on optical reception elements pointing towards the light spot, and the three-dimensional shape of the edge is deduced from the plots made, machining of the lens being carried out according to the plot or plots.