为了提高自会聚、一字型彩色显象管的分辨率,研制了动态象散与聚焦(DAF)电子枪。在当前流行的枪结构中,由于偏转线圈磁场畸变产生的光点偏转散焦和象散,使得分辨率下降。DAF枪,在双电位枪的兰极管部分与主透镜之间,采用了一种新设计的、与四极透镜合并在一起的透镜系统。四极透镜结构简单,面对着的矩形孔互相垂 In order to improve the resolution of a self-converging, in-line color picture tube, a dynamic astigmatism and focusing (DAF) electron gun was developed. In currently popular gun configurations, defocus and astigmatism are caused by spot deflections due to the distortion of the deflection yoke magnetic field, resulting in a decrease in resolution. DAF gun, between the bipolar gun’s pole-tube section and the main lens, incorporates a newly designed lens system incorporated with a quadrupole lens. Quadrupole lens structure is simple, facing the rectangular hole perpendicular to each other