公开(公告)号：EP0715333A1

公开(公告)日：1996-06-05

申请号：EP95307599.1

申请日：1995-10-25

申请人： PICKER INTERNATIONAL, INC.

发明人： Wandke, Norman E. ,  Burke, James E. ,  Miller, Lester ,  Perno, Salvatore

IPC分类号： H01J35/14

CPC分类号： H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/14 ,  H01J35/165 ,  H01J35/24 ,  H01J35/26 ,  H01J2235/10 ,  H01J2235/162 ,  H05G1/025 ,  H05G1/04 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66

摘要： An x-ray tube assembly includes an anode (A) and an envelope (C). A cathode assembly (B) including a cathode (12), which is supported in the envelope on a bearing (32), emits a beam of electrons which strike the anode forming a focal spot (14). The anode rotates relative to the cathode such that focal spot follows a generally annular path along an annular face (16) of the anode. If the axis of the anode and the cathode assembly are screwed or offset, the focal spot path is not circular and wobbles. An adjustment assembly (60) allows adjustment of the relative positions of the anode, the cathode and the envelope to adjust the anode and cathode assembly axes. Another adjustment assembly including one or more electrodes (102, 108) adjusts the position of the focal spot. A control circuit (110) applies an electrostatic potential to the electrodes to move the focal spot such that it stays on a constant plane of the annular face of the anode.An angular position encoder (106) identifies the angular orientation of the anode.

摘要翻译： X射线管组件包括阳极（A）和外壳（C）。 包括阴极（12）的阴极组件（B），其被支撑在轴承（32）上的外壳中，发射撞击阳极的电子束，形成焦点（14）。 阳极相对于阴极旋转，使得焦点沿着沿着阳极的环形面（16）的大致环形路径。 如果阳极和阴极组件的轴线被拧紧或偏移，则焦点路径不是圆形并且摆动。 调节组件（60）允许调节阳极，阴极和外壳的相对位置，以调节阳极和阴极组件的轴线。 包括一个或多个电极（102,108）的另一调节组件调节焦点的位置。 控制电路（110）向电极施加静电电位以使焦点移动，使其停留在阳极的环形面的恒定平面上。角位置编码器（106）识别阳极的角度取向。