Multilayer infrared reflecting optical body
US6049419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Jan 13, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical body comprising (a) a dielectric multilayer film having a reflecting band positioned to reflect infrared radiation of at least one polarization at an incident angle normal to the film, said reflecting band having a short wavelength bandedge .lambda..sub.a0 and long wavelength bandedge .lambda..sub.b0 at a normal incident angle, and a short wavelength bandedge .lambda..sub.a.theta. and long wavelength bandedge .lambda..sub.b.theta. at a maximum usage angle .theta., wherein .theta..sub.a.theta. is less than .lambda..sub.a0 and .lambda..sub.a0 is selectively positioned at a wavelength greater than about 700 nm; and (b) at least one component which at least partially absorbs or reflects radiation in the wavelength region between .lambda..sub.a.theta. and .lambda..sub.a0 at a normal angle of incidence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.