Patent · US Expired

Progressive spectacle lens producing only slight dynamic distortion

US6808263B2 · kind B2 · utility

2Cited by

5References

7Claims

0Family size

Assignee

RODENSTOCK GMBH · DE

Inventors

Andrea Welk · Munich, DE
Peter Baumbach · Hersbruck, DE
Walter Haimerl · Munich, DE
Herbert Pfeiffer · Munich, DE
Gregor Esser · Munich, DE
Helmut Altheimer · Munich, DE
Rainer Dorsch · Reutlingen, DE

Key dates

Filing date	Oct 25, 2002
Grant date	Oct 26, 2004
Priority date	—
Expiry date	Dec 11, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/061
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Described is a spectacle lens comprising a region (distance portion) designed for viewing at large distances and in particular “to infinity”; a region (near portion) designed for viewing at short distances and in particular “reading distances”; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at a near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is rendered distinct by a feature, amongst others, according to which trajectories of motion fulfill specific conditions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.