Variable transmittance optical filter and uses thereof
US8687258B2 · kind B2 · utility
13Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Mar 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/086
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The optical filters comprise a switching material that comprises one or more chromophores that have electrochromic and photochromic properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.