Series of progressive ophthalmic lenses with low divergence and rotation of astigmatism

US7334893B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Helmut Altheimer · Munich, DE
• Gregor Esser · Munich, DE
• Wolfgang Becken · Munich, DE
• Walter Haimerl · Munich, DE
• Andrea Welk · Munich, DE
• Edda Wehner · Grafing, DE

Key dates

• Filing date: Aug 23, 2004
• Grant date: Feb 26, 2008
• Expiry date: Dec 27, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/08
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An ophthalmic lens and a method for producing a progressive ophthalmic lens having at least one progressive surface, where by a calculation and optimization step in the production of the progressive lens is performed. The absolute value of the rotation |rot {right arrow over (A)}| and/or the divergence |div {right arrow over (A)}| of a vectorial astigmatism {right arrow over (A)} is as small as possible, and the absolute value |{right arrow over (A)}| of the vectorial astigmatism {right arrow over (A)} is proportional to the absolute value of an astigmatism in the use position of the progressive lens. The direction of the vectorial astigmatism {right arrow over (A)} is proportional to the axial position of an astigmatism in the use position of the progressive lens or a surface astigmatism of the at least one progressive surface of the progressive lens.