Image intensifier tube target and image intensifier tube with a video output provided with such a target
US4647811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jan 22, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/49
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable gain R.I.I. target is obtained by using an optical fibre board, whose face on the R.I.I. side has blind holes containing two types of granular luminescent materials having different luminous efficiencies and which are separated by a barrier layer. The electron beam from the R.I.I. photocathode is subject to two different accelerating voltages, the lower accelerating voltage exciting the luminescent material with the lower luminous efficiency and the higher accelerating voltage exciting the luminescent material with the higher luminous efficiency. Application to image intensifier tubes, used more specifically in radiology and fluoroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.