Photochromic polarizing plate and shutter polarizing plate
US8934170B2 · kind B2 · utility
26Cited by
1References
20Claims
0Family size
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Key dates
| Filing date | Oct 26, 2012 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Jul 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133631
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a photochromic polarizing plate exhibiting reduced tint. The photochromic polarizing plate contains a laminate including at least one film, a polarizer, and an optically transparent substrate, wherein the photochromic polarizing plate has a single-plate transmittance T1(λ)% and a crossed transmittance T2(λ)% at a wavelength of λ nm satisfying Formulae (1) to (4): Formula (1) 55%≧T1(430)≧38%; Formula (2) 60%≧T1(590)≧42.5%; Formula (3) 1.0≧T1(430)/T1(590)≧0.9; and Formula (4) T2(430)≧0.02%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.