Transparent metallic coating and a glass overcoating on a plastic substrate produce a chromatic effect
US4160584A · kind A · utility
10Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1977 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Jan 3, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Spectacles are provided which comprise lenses having a transparent substrate upon which a continuous transparent metallic layer is vapor deposited. Coated thereover is a continuous layer of a dielectric material which is an odd multiple of one-quarter wavelength of a reference color in thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.