Patent · US Active

Quasi progressive lenses for eyewear

US9618774B2 · kind B2 · utility

3Cited by

50References

20Claims

0Family size

Assignee

SHAMIR OPTICAL INDUSTRY LTD. · IL

Inventors

Yuval Carmon · Kiryat Tivon, IL
Yotam Gil · Nes Ziona, IL
Liron Gleser · Rosh Pina, IL
Alex Shur · Haifa, IL

Key dates

Filing date	May 9, 2014
Grant date	Apr 11, 2017
Priority date	—
Expiry date	May 9, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/066
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Various embodiments disclose a quasi progressive lens including a first optical zone capable of providing distance vision, a second optical zone capable of providing near vision and a transition zone connecting the first and second optical zones. Physical dimensions (e.g., length and width) of the transition zone are adjusted to increase the size of the second optical zone in comparison to progressive lenses and to reduce residual cylinder power and aberrations along the convergence path in comparison to bifocal lenses.

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