Non-color shifting multilayer structures and protective coatings thereon
US10870740B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 2014 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Apr 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An omnidirectional structural color pigment having a protective coating. The pigment has a first layer of a first material and a second layer of a second material, the second layer extending across the first layer. In addition, the pigment reflects a band of electromagnetic radiation having a predetermined full width at half maximum (FWHM) of less than 300 nm and a predetermined color shift of less than 30° when the pigment is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45°. The pigment has a weather resistant coating that covers an outer surface thereof and reduces a relative photocatalytic activity of the pigment by at least 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.