Lens for vision enhancement
US6641261B2 · kind B2 · utility
53Cited by
8References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Oct 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens transmits a maximum 2 percent average intensity of ultraviolet light and transmits a minimum 95 percent average intensity of light in a brightness perception spectrum of the eye. In addition, maximum percentages of violet and/or blue light are transmitted. In some cases, the lens transmits a maximum percentage average intensity of red light while transmitting the minimum 95 percent average intensity of light in the brightness perception spectrum. The lens is incorporated in protective eyewear, especially into eyewear used by medical personnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.