Multifocal ophthalmic lens having chromatic aberration correction
US10420638B2 · kind B2 · utility
8Cited by
2References
12Claims
0Family size
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Key dates
| Filing date | Apr 27, 2017 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Oct 30, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ophthalmic lens includes an optic comprising an anterior surface, a posterior surface, and an optical axis. At least one of the anterior surface and the posterior surface has a surface profile including a base curvature, a refractive region having the base curvature, and a diffractive region comprising a diffractive profile including a plurality of diffractive steps. At least a portion of the diffractive profile constitutes a combination of a base diffractive profile defining multiple foci for the ophthalmic lens and an achromatizing structure that reduces longitudinal chromatic aberrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.