Progressive spectacle lens having a genuine short progression area

US6834957B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Andrea Welk · Munich, DE
• Peter Baumbach · Hersbruck, DE
• Walter Haimeri · Hersbruck, DE
• Gregor Esser · Munich, DE
• Helmut Altheimer · Munich, DE
• Edda Wehner · Grafing, DE
• Norbert Awrath · Munich, DE
• Martin Zimmermann · Abensberg, DE
• Winfried Nikolaus · Haar, DE

Key dates

• Filing date: Sep 9, 2003
• Grant date: Dec 28, 2004
• Expiry date: Sep 9, 2023

Classification

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

Abstract

A progressive power spectacle lens in which a progressive length is less than or equal to 12 mm and width of the distance portion in a horizontally meridian y=+7 mm in dependence on power and addition power is larger than the values given in the following Table:Sph =−6.0 dpt−2.5 dpt0.5 dpt3.0 dpt5.0 dptAddition47 mm55 mm60 mm60 mm60 mmPower = 1.0Addition34 mm36 mm34 mm29 mm35 mmPower = 2.0Addition26 mm27 mm25 mm22 mm23 mmPower = 3.0.