Eyewear with chroma enhancement
US11397337B2 · kind B2 · utility
2Cited by
0References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 28, 2019 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Apr 12, 2040 |
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.