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:
Mar. 29, 2005
Filed:
Feb. 16, 2001
Makoto Miyazawa, Nagano, JP;
Yoshinori Tabata, Nagano, JP;
Takahiro Uchidani, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A lens surface shape is created by a near-finish surface forming rough-cutting step of creating a near-finish surface shape analogous to a lens surface shape based on a prescription of a spectacle lens from a spectacle lens base materialby numerically controlled cutting, and a finish-cutting step of creating the lens surface shape based on the prescription of the spectacle lens from the near-finish surface shape by numerically controlled cutting. According to this method of producing a spectacle lens, all kinds of spectacle lenses including an inner surface progressive power lens can be produced with high productivity. A complex curved surface can be mirror-polished by a polishing tool, which includes an elastic sheethaving a curved surface, wherein a workpiece is polished by applying a pressure to the inner surface side of the elastic sheet, to stretch the elastic sheetand bring the outer surface side of the elastic sheetinto contact with the workpiece.