EP 0553914 A1 19930804 - Variable-focus X-ray tube.
Title (en)
Variable-focus X-ray tube.
Title (de)
Röntgenröhre mit veränderlichem Brennfleck.
Title (fr)
Tube à rayons X ä foyer variable.
Publication
Application
Priority
EP 92200206 A 19920127
Abstract (en)
In an X-ray tube the geometry of a cathode sleeve (5) is such that a comparatively large variation of focus dimensions on the anode is achieved by way of a single potential variation between, for example +0 and +2000 V. Notably a width dimension of a focus can thus be varied between, for example 0.1 and 2.0 mm and with a focus length of 2.0 operation can take place with a line focus of 0.1 x 2.0 mm<2> as well as with a square focus of 2.0 x 2.0 mm<2>. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 35/06 (2006.01); H01J 35/14 (2006.01)
CPC (source: EP US)
H01J 35/066 (2019.04 - EP US)
Citation (search report)
- [A] EP 0349388 A1 19900103 - GEN ELECTRIC CGR [FR]
- [A] EP 0283039 A2 19880921 - LITTON SYSTEMS INC [US]
- [A] US 4344011 A 19820810 - HAYASHI TADASHI, et al
- [AD] EP 0389326 A1 19900926 - GEN ELECTRIC CGR [FR]
- [A] PATENT ABSTRACTS OF JAPAN vol. 8, no. 209 (E-268)22 September 1984 & JP-A-59 094 348 ( HITACHI ) 31 May 1984
Designated contracting state (EPC)
CH DE FR GB LI NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 93200136 A 19930120; JP 1175493 A 19930127