Coloring structure having reflecting and interfering functions
US5472798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jul 11, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2598
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coloring structure for generating a color having a wave length in an area of a visible light by reflecting and interfering actions of a natural light includes first substance layers having an optical refractive index of n.sub.a and second substance layers having an optical refractive index of n.sub.b. The second layers overlie respective first layers in an alternating arrangement of the first and second layers. In order to generate a brilliant color by the reflecting and interfering actions, the optical refractive indexes n.sub.a and n.sub.b are established to satisfy both of relationships "1.3.ltoreq.n.sub.a " and "1.1.ltoreq.n.sub.b /n.sub.a .ltoreq.1.4". The coloring structure may contain a fluorescent pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.