Progressive spectacle lens with low swaying effects

US6669337B2 · kind B2 · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Andrea Welk · Munich, DE
• Peter Baumbach · Hersbruck, DE
• Walter Haimerl · Munich, DE
• Herbert Pfeiffer · Munich, DE
• Norbert Awrath · Munich, DE
• Gregor Esser · Munich, DE
• Helmut Altheimer · Munich, DE
• Rainer Dorsch · Reutlingen, DE
• Martin Zimmermann · Abensberg, DE
• Jochen Brosig · Grünwald, DE
• Werner Mueller · Rain, DE
• Martin Wechs · Munich, DE
• Stephan Haser · Munich, DE
• Winfried Nikolaus · Haar, DE

Key dates

• Filing date: Oct 25, 2002
• Grant date: Dec 30, 2003
• Expiry date: Oct 25, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/061
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Described is a spectacle lens comprising 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 distinct in that the astigmatic deviation, i.e. the difference between the prescribed and the actual astigmatism along circles having a center lying 4 mm below the centration point and having a diameter of 10 to 40 mm satisfies the following conditions: two local minima occur which on a “right-hand side spectacle lens” are located at 95°±10° (according to TABO) and at 280°±10°, and on a “left-hand side spectacle lens” at 85°±10° and 260°±10°; and two local maxima occur which on both a “…