Patent · US Active

Multifocal lens having reduced chromatic aberrations

US10426599B2 · kind B2 · utility

7Cited by

6References

10Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Myoung-Taek Choi · Arlington, US
Xin Hong · Arlington, US
Yueai Liu · Fort Worth, US

Key dates

Filing date	Nov 29, 2016
Grant date	Oct 1, 2019
Priority date	—
Expiry date	Feb 28, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02C2202/22
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A method and system provide a multifocal ophthalmic device. The ophthalmic lens has an anterior surface, a posterior surface and at least one diffractive structure including a plurality of echelettes. The echelettes have at least one step height of at least one wavelength and not more than two wavelengths in optical path length. The diffractive structure(s) reside on at least one of the anterior surface and the posterior surface. The diffractive structure(s) provide a plurality of focal lengths for the ophthalmic lens.

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