Method of manufacturing progressive ophthalmic lenses

US6685316B2 · kind B2 · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Peter Baumbach · Hersbruck, DE
• Gregor Esser · Munich, DE
• Werner Mueller · Rain, DE
• Jochen Brosig · Grünwald, DE
• Walter Haimerl · Munich, DE
• Helmut Altheimer · Munich, DE
• Herbert Pfeiffer · Munich, DE

Key dates

• Filing date: Jul 16, 2002
• Grant date: Feb 3, 2004
• Expiry date: Jul 21, 2022

Classification

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

Abstract

What is described here is a method of manufacturing progressive ophthalmic lenses whereof each is produced in correspondence with the individual data of a specific spectacle wearer, and whereof eachpresents a first surface having a defined surface power value in the surface apex, andpresents a non-spherical second surface (prescription surface) whose surface power varies along a line (referred to as principal line in the following) that follows at least approximately the main line of sight when the view is lowered, suchthat the ophthalmic lens produces a first effect in a first reference point, which is suitable for viewing in a first distance envisaged for the respective application, andthat this effect varies along the principal line by a predetermined value (addition Add) to a second value present in a second reference point, which is suitable for viewing in a second distance envisaged for the respective application, and whose second surface possibly presents a surface astigmatism optionally for partly compensating an ocular astigmatism and/or the astigmatism of oblique bundles.The inventive method excels itself by the following steps of operation:initially, ophthalmic lens blan…