Cathode head with focal spot control
US7257194B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2004 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Feb 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J35/153
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode head is provide that is suitable for use in an x-ray device that includes an anode having a target surface configured and arranged to receive electrons emitted by the cathode head. The cathode head may be constructed of magnetic or non-magnetic material and includes an emitter block carrying a filament that defines a longitudinal axis about which is disposed one or more magnetic coils. The filament is configured and arranged to emit an electron beam that defines a focal spot on the target surface of the anode. The magnetic coil, or coils, disposed about the longitudinal axis defined by the filament generate a magnetic field that enables control of the location of the focal spot on the target surface of the anode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.