Polarized lens with oxide additive
US6334680B1 · kind B1 · utility
240Cited by
25References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
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 relatively high light transmittancy at 450 nm, 540 nm, and 610 nm, and relatively low light transmittency at 500 nm and at 580 nm. A polarized filter is included to reduce glare, and an anti-reflective layer minimizes ghost images, haze, and loss of contrast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.