Multilayer infrared reflecting film with high and smooth transmission in visible wavelength region and laminate articles made therefrom
US7236296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | May 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/282
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multilayer film article is disclosed. The film includes an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type and an infrared light absorbing or reflecting layer adjacent the multilayer film. The film includes a multilayer stack composed of alternating optical layers of first and second diverse polymers A, B. The optical layers when counted from one end of a first effective optical packet form a plurality of unit cells each having six optical layers arranged in relative optical thicknesses in a first cyclic permutation of 7A1B1A7B1A1B. At normal incidence the first effective optical packet provides a reflection band at infrared wavelengths and substantially transmits light at visible wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.