Remote focus x-ray tube

Details Remote focus x-ray tube Remote focus x-ray tube

H - Electricity

01

J

313/24

H01J 35/14 (2006.01) H01J 35/16 (2006.01)

Patent

CA 1112280

PHD 77-028 8-3-1978 ABSTRACT: Remote-focus X-ray tubes, in particular dental X-ray tubes, have the problem that the focus is shifted as a result of which the emission distribution changes. It has now been found that a cause of said shifting is the earth magnetic field and, sometimes, magnetic fields pro- duced by electromagnetic elements of the apparatus. In order to eliminate these magnetic fields the anode tube is surrounded by a soft-magnetic layer which is dimensioned so that it serves at the same time as prefilter for the useful radiation emitted by the target. -7-

301063

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