Patent · US Active

Electron-emission device

US11373835B2 · kind B2 · utility

0Cited by

8References

4Claims

0Family size

Assignee

Siemens Healthcare Limited · DE

Inventors

Josef Deuringer · Herzogenaurach, DE
Joerg Freudenberger · Kalchreuth, DE

Key dates

Filing date	Jan 25, 2019
Grant date	Jun 28, 2022
Priority date	—
Expiry date	Jan 25, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2235/062
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An X-ray tube of an embodiment includes an anode; and an electron emission device. In an embodiment, the electron emission device includes at least one electron emitter including at least one emission surface and at least one barrier grid, the at least one barrier grid being spaced apart from the at least one emission surface of the electron emitter and includes a definable number of individually controllable grid segments. According to an embodiment, at least one individually definable grid voltage is applicable to each of the grid segments. In a simple manner, an electron-emission device of an embodiment permits the image quality to be adjusted with minimal anode loading.

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