X-ray image intensifier tube having a photocathode and a scintillator screen positioned on a microchannel array
US5319189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1993 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Feb 23, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/501
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An X-ray image intensifier tube includes a scintillator screen for converting ionizing radiation into light radiation or near-visible radiation, a microchannel array for achieving electron multiplication, and a photoelectrode positioned directly on an input face of the microchannel array. The input face of the microchannel array is coated with an electrically conductive layer which directly contacts the photocathode. The present design eliminates strict spacing requirements between the photocathode and the microchannel array and allows the photocathode and the microchannel array to operate at a single potential rather than requiring separate potentials. The requirement of a separate support for the scintillator screen is also obviated since the scintillator screen is formed on the input face of the microchannel array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.