Method for the manufacture of a spectacle lens, spectacle lens and spectacle lens family

US6709106B2 · kind B2 · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Gerhard Kelch · Aalen, DE
• Helmut Wietschorke · Laberweinting, DE

Key dates

• Filing date: Apr 24, 2001
• Grant date: Mar 23, 2004
• Expiry date: Feb 15, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/068
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This disclosure relates to a spectacle lens family and methods of manufacturing the same, which in one embodiment has a multifocal property such that along a line between a far-vision reference point and a near-vision reference point spaced apart therefrom a mean spherical power changes continuously from a first value at the far-vision reference point to a second value at the near-vision reference point, wherein the spectacle lenses of the spectacle lens family each exhibit the same difference between the first value and the second value and nominal dioptric powers which are different from one another, wherein the shape of a first lens surface of the spectacle lenses is formed of a sphere and/or a torus to obtain the respective nominal dioptric power, wherein the spectacle lenses of the spectacle lens family have a basic shape of a second lens surface of the spectacle lens in common which provides the multifocal property, and wherein the shape of the second lens surface of each spectacle lens of the spectacle lens family deviates from said basic shape dependent on the respective nominal dioptric power to obtain, with different nominal dioptric powers of different spectacle lenses, …