Polarizer, method for producing same, polarizing plate, optical film, and image display
US7651643B2 · kind B2 · utility
10Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Jul 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarizer of the invention comprises a polyvinyl alcohol-based film which is at least dyed with at least iodine and uniaxially stretched, having a single transmittance of 43% or more, a polarizing efficiency of 99.9% or more, and a dichroic ratio of 30 or more, wherein the dichroic ratio is calculated from a parallel transmittance (Tp) and a crossed transmittance (Tc) at a wavelength of 440 nm, and have good hue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.