EP 0173047 A3 19880316 - X-RAY TUBE
Title (en)
X-RAY TUBE
Publication
Application
Priority
DE 3431434 A 19840827
Abstract (en)
[origin: EP0173047A2] An X-ray tube has a cathode, a grid, a perforated anode and a target, arranged behind the perforated anode, with an exit window on the side for the X-ray radiation. In addition, two deflection coils, in each case connected to an AC voltage source, are provided for lateral deflection of the electron beam in two planes. The response and frequency of the output voltages or output currents of the AC voltage source are dimensioned such that the impact point of the electron beam on the target flows through closely adjacent tracks, like the electron beam of a television tube, and thus sweeps over an area on the target which is turned towards the exit window as a macro-focus spot. By forming such a macro-focus spot by deflection of a micro-focus spot, an even intensity distribution is achieved over the complete extent of the macro-focus spot. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 35/04 (2006.01); H01J 35/14 (2006.01); H01J 35/30 (2006.01)
CPC (source: EP US)
H01J 35/04 (2013.01 - EP); H01J 35/147 (2019.04 - EP US); H01J 35/30 (2013.01 - EP)
Citation (search report)
- [Y] DE 3222515 A1 19840322 - FEINFOCUS ROENTGENSYSTEME GMBH [DE]
- [Y] US 3176137 A 19650330 - ERNST-GUNTER HOFMANN, et al
- [A] DE 2813657 A1 19791004 - BAHRAMI BAHRAM DR MED
- [A] US 3852605 A 19741203 - WATANABE E, et al
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
EP 0173047 A2 19860305; EP 0173047 A3 19880316; DE 3431434 A1 19860306; DK 368685 A 19860228; DK 368685 D0 19850814
DOCDB simple family (application)
EP 85108795 A 19850713; DE 3431434 A 19840827; DK 368685 A 19850814