Patent · US Active

Multi-focal lenses with segmented boundaries

US8297751B2 · kind B2 · utility

21Cited by

5References

20Claims

0Family size

Assignees

Carl Zeiss Vision GmbH · DE
Carl Zeiss Vision International GmbH · DE

Inventors

Ray Steven Spratt · Petaluma, US
Darryl Meister · Olathe, US
Wolf Krause · Munster, DE

Key dates

Filing date	Apr 22, 2010
Grant date	Oct 30, 2012
Priority date	—
Expiry date	Nov 30, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/063
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention provides multi-focal segmented lenses with boundaries that include at least one blended portion and at least one sharp portion. The lenses may possess, for example, the aesthetic advantage of blended multi-segment or progressive lenses while largely retaining the functional advantage of multi-segment lenses with sharp segment boundaries.

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