Film for optical applications
US6859322B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2002 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Feb 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/111
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film for optical applications comprising (A) a hard coat layer which comprises a resin cured by an ionizing radiation, (B) a high refractivity layer I which comprises a resin cured by an ionizing radiation and a metal oxide and has a refractive index in a range of 1.70 to 1.95, (C) a high refractivity layer II which comprises a resin cured by an ionizing radiation and a metal oxide and has a refractive index in a range of 1.60 to 1.70 and (D) a low refractivity layer which comprises a siloxane-based polymer and has a refractive index in a range of 1.37 to 1.47, layers (A) to (D) having specific thicknesses and being successively laminated at least on one face of a substrate film. The film exhibits an excellent property for preventing reflection of light and excellent scratch resistance and can be produced at a low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.