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:
Nov. 18, 2014
Filed:
Dec. 09, 2009
Helmut Altheimer, Baisweil-Lauchdorf, DE;
Wolfgang Becken, Munich, DE;
Gregor Esser, Munich, DE;
Dietmar Uttenweiler, Icking, DE;
Andrea Welk, Munich, DE;
Helmut Altheimer, Baisweil-Lauchdorf, DE;
Wolfgang Becken, Munich, DE;
Gregor Esser, Munich, DE;
Dietmar Uttenweiler, Icking, DE;
Andrea Welk, Munich, DE;
Rodenstock GmbH, Munich, DE;
Abstract
A method and apparatus for creating a progressive spectacle lens design by transforming a starting design. The starting design is defined to include specifications for the course of a principal line and specification of at least one base target isoastigmatism line with a constant base target astigmatism, in which the base target isoastigmatism line passes through a first predetermined control point {right arrow over (r)}=(u,y). The method and apparatus transform the starting design by shifting the first control point {right arrow over (r)}=(u,y) along a predetermined or predeterminable curve, taking into account the design and/or the spectacle lens wearer-specific data; modifying the course of the base target isoastigmatism line such that it passes through the shifted first control point {right arrow over (r)}'(u′,y′); and calculating a target astigmatism distribution A(u,y), which exhibits the modified base target isoastigmatism line. Furthermore, the method and apparatus are provided to create the spectacle lens on the basis of the progressive spectacle lens design.