Patent ID: 6314161
Filing Date: 2001-11-06
Classification: H01J

Abstract:
A rotary anode type X-ray tube, comprising:a cathode structure for emitting an electron beama rotary anode target, having a rotational axis and faced to said cathode structure, for radiating an X-ray upon impinging of the electron beam;a rotary structure having the rotational axis and fixed to said rotary anode target;a stationary shaft for rotatably supporting the rotary structure, which is fitted in said rotary structure and said anode target, is so arranged as to penetrate the anode target and has one end at the side of said cathode structure and other end at the opposite side of said cathode structure;a bearing, arranged between said rotary structure and stationary shaft, for allowing said rotary structure to rotate around said stationary shaft; anda vacuum envelope for housing said cathode structure, said rotary anode target, said stationary shaft and said rotary structure, which has a X-ray window for transmitting an X-ray, the one and other ends of said stationary shaft being fixed to said vacuum envelope and the one end being so positioned as to be deviated from the rotational axis of said rotary structure and said rotary anode target.