Patent · US Active

Multifocal lens

US9223148B2 · kind B2 · utility

23Cited by

5References

23Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Werner Fiala · Wien, AT
Mario Gerlach · Hohen Neuendorf, DE

Key dates

Filing date	Oct 28, 2012
Grant date	Dec 29, 2015
Priority date	—
Expiry date	Nov 9, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02C2202/20
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A multifocal lens has a number n>2 of principal powers, of which at least one principal power is refractive and at least one principal power is diffractive. The multifocal lens includes a first lens portion having at least one first annular zone and at least a second lens portion having at least one second annular zone, wherein the zones each have at least one main sub-zone and at least one phase sub-zone. For forming the n principal powers, a maximum of n−1 lens portions are combined, and an averaged refractive power of a zone of the first lens portion is equal to an averaged refractive power of a zone of the second lens portion.

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