Optical film
US9664834B2 · kind B2 · utility
1Cited by
56References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2009 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Apr 8, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical film that includes a reflective polarizer and a stretched polymer film is disclosed. The stretched polymer film is laminated to the reflective polarizer, and the stretched polymer film exhibits a refractive index symmetry point at an angle of incidence in air of at least about 60 degrees in a plane of incidence parallel to a direction of greatest stretch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.