Fresnel lens base sheet
US6663953B2 · kind B2 · utility
5Cited by
5References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 14, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Feb 14, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A Fresnel lens base sheet is provided which is suitable for the formation of a lens layer of an ultraviolet-cured resin and has excellent impact resistance and environmental resistance. The Fresnel lens base sheet comprises a specific rubber-modified styrene resin comprising a rubber-like elastic material as dispersed particles and a copolymer of a styrene monomer with an acrylic (methacrylic) ester monomer as a continuous phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.