Method for calculation of the magnification and/or distortion and method for production of a spectacle lens with low magnification and/or distortion

US8805612B2 · kind B2 · utility

Assignee

• RODENSTOCK GMBH · DE

Inventors

• Wolfgang Becken · Munich, DE
• Gregor Esser · Munich, DE
• Helmut Altheimer · Munich, DE
• Dietmar Uttenweiler · Munich, DE

Key dates

• Filing date: Nov 24, 2006
• Grant date: Aug 12, 2014
• Expiry date: Dec 11, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/063
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to a method for calculation of the local magnification and/or the local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, with the spectacle lens being designed to correct a refraction deficit of an eye, and having at least one object-side surface and one second eye-side surface, comprising the following steps: Calculation for the predetermined or predeterminable viewing direction of the profile of a main beam which originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through the rotation point of the eye, through the entrance pupil of the eye or through the principal plane of the eye; determination of the main curvatures and directions of a local wavefront associated with the main beam on refraction by the spectacle lens; calculation of the local magnification and/or the local distortion of the spectacle lens from the determined main curvatures and directions of the local wavefront, the data relating to the profile of the main beam, and the data relating to the spectacle lens.