Formable reflective multilayer body
US5568316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Apr 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A formable multilayer reflective polymeric body which has a substantially uniform broad bandwidth reflectance over substantially the entire range of the visible spectrum to provide a substantially uniform reflective appearance is provided. The body includes at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of the first and second polymeric materials such that at least 40% of visible light incident on the body is reflected. A substantial majority of the individual layers of the body have optical thicknesses in the range where the sum of the optical thicknesses in a repeating unit of the polymeric materials is greater than about 190 nm, and the first and second polymeric materials differ from each other in refractive index by at least about 0.03.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.