Optical filter
US6532120B1 · kind B1 · utility
10Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2211/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter comprises a transparent support and a filter layer. The filter layer has an absorption maximum in the wavelength region of 560 to 620 nm. The absorption maximum has a half-width in the range of 5 to 50 nm. The optical filter properly absorbs undesired light component emitted from an image display apparatus (especially, a plasma display panel).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.