在x射线管中,焦点的大小和形状对影象起着决定性的作用。焦点中电子分布不均匀现象不仅会损坏光学焦点的性能,而且降低了管子的功率。焦点的大小和形状是由电极的形状和尺寸所决定。聚焦极形状和集射 In x-ray tubes, the size and shape of the focus plays a decisive role in the image. The uneven distribution of electrons in the focus not only damages the performance of the optical focus but also reduces the power of the tube. The size and shape of the focus is determined by the shape and size of the electrode. Focusing on pole shapes and set shots