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. 01, 2005
Filed:
Oct. 25, 2002
Andrea Welk, Munich, DE;
Peter Baumbach, Munich, DE;
Walter Haimerl, Munich, DE;
Herbert Pfeiffer, Munich, DE;
Gregor Esser, Munich, DE;
Helmut Altheimer, Lauchdorf, DE;
Rainer Dorsch, Munich, DE;
Andrea Welk, Munich, DE;
Peter Baumbach, Munich, DE;
Walter Haimerl, Munich, DE;
Herbert Pfeiffer, Munich, DE;
Gregor Esser, Munich, DE;
Helmut Altheimer, Lauchdorf, DE;
Rainer Dorsch, Munich, DE;
Rodenstock GmbH, Munich, DE;
Abstract
A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular 'to infinity'; a region (near portion) designed for viewing at short distances and in particular 'reading distances'; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is distinguished by a combination of the following features: a change of magnification with a direction of sight is small; the magnification increases radially, starting from the distance reference point; the difference between the magnifications at the distance and near reference points is small.