Patent · US Expired

X-ray tube with flying focus

US6292538A · kind A · utility

38Cited by

8References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Hell · Erlangen, DE
Detlef Mattern · Erlangen, DE
Peter Schardt · Simmerath, DE

Key dates

Filing date	Jan 19, 2000
Grant date	Sep 18, 2001
Priority date	—
Expiry date	Jan 19, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01J35/305
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

X-ray tube with flying focus has a magnet system for deflecting and focusing the electron beam, whereby the magnet system including a carrier that is constructed as an iron yoke and that has four pole projections that are arranged around the axis of the electron beam offset from one another by 90.degree., on which two pairs of coils (z-coils and .phi.-coils) are arranged so as to be offset from one another 90.degree.. The individual coils of each pair supplied with a common high-frequency alternating current that deflects the electron beam in the .phi.-and z-directions, respectively, in a pulsed manner.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.