Eyewear with chroma enhancement
US8770749B2 · kind B2 · utility
46Cited by
89References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Feb 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Some embodiments provide a lens including a lens body and an optical filter configured to attenuate visible light in a plurality of spectral bands. Each of the plurality of spectral bands can include an absorptance peak with a spectral bandwidth, a maximum absorptance, and an integrated absorptance peak area within the spectral bandwidth. An attenuation factor obtained by dividing the integrated absorptance peak area within the spectral bandwidth by the spectral bandwidth of the absorptance peak can be greater than or equal to about 0.8 for the absorptance peak in each of the plurality of spectral bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.