Lenticular lens sheet and method for producing it
US6384970B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a lenticular lens sheet on which external light reflection is greatly reduced and which gives high-contrast sharp images. The lenticular lens sheet has a plurality of lenticular lenses formed on one surface of a light-transmissive substrate and having, on the other surface of the substrate, convex lenses 2, and external light-absorbing ridges 3 as formed alternately with those convex lenses and coated with an external light-absorbing layer 4 on their tops, in which every furrow 5 between each convex lens 2 and each external light-absorbing ridge 3 that ate adjacent to each other is further coated with an external light-absorbing layer 6. The external light-absorbing layer may be not only on the top of each ridge but also around each ridge adjacent to the top thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.