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. 13, 2001
Filed:
Jun. 10, 1998
Kazutoshi Kato, Suwa, JP;
Akira Komatsu, Suwa, JP;
Hiroyuki Mukaiyama, Suwa, JP;
Tadashi Kaga, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A manufacturing method of a progressive multi-focal lens which has a progressive surface area comprising a distance portion and a near portion, which have different refractive powers, and a progressive portion positioned between them in which the refractive power changes progressively. The progressive surface which reflects customized information for each individual user including at least one of the information concerning each individual user's eyes or lifestyle of the user is designed. A lens design process provides processing data for the progressive multi-focal lenses with the custom-made progressive surfaces. By so doing, it is possible to provide the most appropriate spectacle lenses for the users and, at the same time, it is possible to eliminate the process of storing lenses in a semi-finished state after being processed so that it is possible to provide lenses which are suited to users at a lower cost.