EP 0003454 B1 19830511 - X-RAY TUBE COMPRISING A DEVICE FOR REDUCING THE DIVERGENCE OF ITS USEFUL BEAM
Title (en)
X-RAY TUBE COMPRISING A DEVICE FOR REDUCING THE DIVERGENCE OF ITS USEFUL BEAM
Publication
Application
Priority
FR 7801878 A 19780124
Abstract (en)
[origin: US4217517A] An x-ray tube providing a flat, fan-shaped uniform x-ray beam. The tube includes inside a vacuum glass envelope, a cathode or cathodes, a fixed or cylindrical rotating anode, and an anti-divergence diaphragm. The anti-divergence diaphragm has an opening, through which passes the beam. The walls of the opening have the shape of a sector of the fan-shaped beam in one plane (z-z'), and are flat in a perpendicular plane. A plurality of x-ray absorbing blades are positioned in the opening parallel to the fan-shaped side dividing the opening and the beam passing therethrough, thereby minimizing overall divergence of the beam. A plurality of cathodes may be used in the rotating anode tube, each separately focusable to provide beams of different intensity, and alternately operable.
IPC 1-7
IPC 8 full level
H01J 35/00 (2006.01); G21K 1/02 (2006.01); H01J 35/04 (2006.01); H01J 35/14 (2006.01); H01J 35/26 (2006.01)
CPC (source: EP US)
G21K 1/025 (2013.01 - EP US); H01J 35/04 (2013.01 - EP US); H01J 35/26 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL SE
DOCDB simple family (publication)
EP 0003454 A1 19790808; EP 0003454 B1 19830511; DE 2965335 D1 19830616; FR 2415365 A1 19790817; FR 2415365 B1 19800919; HU 180766 B 19830429; JP S54110793 A 19790830; US 4217517 A 19800812
DOCDB simple family (application)
EP 79400035 A 19790119; DE 2965335 T 19790119; FR 7801878 A 19780124; HU GE001059 A 19790123; JP 699179 A 19790123; US 455879 A 19790118