Light diffuser with variable diffusion
US6846098B2 · kind B2 · utility
221Cited by
12References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2002 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | May 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133504
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light diffuser comprises a film bearing a macro diffusion efficiency variation in which the efficiency variation is greater than 5% between two locations that are separated by at least 2 cm where the diffuser comprises a base and a plurality of convex or concave complex lenses on the surface of the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.