Polarized lens with oxide additive
US6604824B2 · kind B2 · utility
236Cited by
27References
20Claims
0Family size
Inventor
Key dates
| Filing date | Dec 3, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens for reducing glare and improving color discrimination includes a lens wafer containing a rare earth oxide such as neodymium that provides progressively higher transmittance at 540 nm than at 500 nm and at 450 nm, and average transmittance at 540 and 610 nm that is greater than the transmittance at 580 nm. A ultra-violet absorber, a polarized filter and anti-reflective layer may be included to reduce UV light, glare and improve contrast and vision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.