Surface formed lenses on voided polymer light diffuser
US6890642B2 · kind B2 · utility
44Cited by
12References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249991
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a transparent polymeric diffusion film exhibiting at least 50% transmissivity containing a thermoplastic polymeric material with internal microvoids and containing a plurality of complex lenses on a surface thereof. Such films are useful for diffusing light when it is desired to provide and even light distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.