Image intensifier tube with increased contrast ratio
US4550251A · kind A · utility
7Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1983 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Jul 8, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2231/50063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The contrast ratio of an image intensifier of the photocathode-amplifier-phosphor type is increased by using a fiber optic plate of which the thickness is reduced to such extent that the plate may not be able to function as a vacuum seal or an electrical insulator when a typical voltage for the operation of the intensifier is applied to the phosphor layer. This relatively thin fiber optic plate is placed entirely inside a vacuum, protected from the atmospheric pressure by a thick output window plate which is optically transparent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.