Lens sheet
US5015524A · kind A · utility
8Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Dec 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lens sheet comprising a transparent substrate and a lens portion composed of a cured product of an ultraviolet-curable resin composition, which is formed on at least one surface of the transparent substrate. The resin composition exhibits a polymerization shrinkage at curing of not larger than 20% as calculated based on the difference of the specific gravity at 25.degree. C., and a modulus of elasticity at 25.degree. C. after curing of 10 to 1,000 kg/cm.sup.2. The ultraviolet-curable resin composition is preferably comprised of a polyvalent (meth)acrylate, a mono(meth)acrylate and a photopolymerization initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.