Photomultiplier tube using means of preventing divergence of electrons
US4937506A · kind A · utility
10Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J43/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A photomultiplier tube comprising a photocathode, a plurality of mesh dynodes arranged parallel to the photocathode, an anode that is disposed in a face-to-face relationship with the photocathode in such a manner that the mesh dynodes are interposed between the anode and the photocathode, the anode being divided into segments larger than the openings of each dynode, and at least one layer of focusing electrode for focusing an electron beam by the lens action which is disposed between the photocathode and the anode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.