Optical film with sharpened bandedge
US6157490A · kind A · utility
193Cited by
41References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1998 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Jan 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides reflective films and other optical bodies which exhibit sharp bandedges on one or both sides of the main reflection bands. The optical bodies comprise multilayer stacks M.sub.1 and M.sub.2, each having first order reflections in a desired part of the spectrum and comprising optical repeating units R.sub.1 and R.sub.2, respectively. At least one of the optical repeating units R.sub.1 and R.sub.2 varies monotonically in optical thickness along the thickness of the associated multilayer stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.