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:
Feb. 24, 2009
Filed:
Aug. 03, 2004
James Daniel Riall, Roanoke, VA (US);
Walter Dannhardt, Roanoke, VA (US);
Roland Mandler, Heuchelheim, DE;
Tobias Müller, Wettenberg, DE;
James Daniel Riall, Roanoke, VA (US);
Walter Dannhardt, Roanoke, VA (US);
Roland Mandler, Heuchelheim, DE;
Tobias Müller, Wettenberg, DE;
Essilor International (Compagnie Generale D'Optique), Charenton Cedex, FR;
Abstract
A raster cutting apparatus and method for producing accurately formed, aspheric ophthalmic lenses having a good quality surface finish. The accurate form and good surface finish are obtained by using a substantially spherically shaped cutting tool having a large radius. The methods include utilizing a cutting path which provides substantially constant cutting-force, such as a constant surface-cutting-speed raster pattern.