Optical filter made of inorganic material for blue light
US4741962A · kind A · utility
9Cited by
7References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 13, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jun 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/226
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to an optical filter made of inorganic material for blue light which transfers blue light and absorbs all of the other colored lights by sticking an inorganic mixture powder pasted by mixing with screen oil on a glass substrate and firing it. The mixture includes transparent glass material powder and a combination of oxides of cobalt and aluminum. The contrast of a picture displayed on a display device can be substantially increased by reducing the reflection of incident ambient light without the reduction of brightness on account of the application of the above optical filter onto the displaying screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.