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利用ＳＥＵ－８７５３Ｄ程序对彩色显像管电子枪系统做了详细地计算，得到了放大率，球差，空间电荷效应的变化曲线，由此看出它们对上屏束点大小的影响，并且由这些曲线中找到使上屏束点最小的结构。
The system of SEU-8753D was used to calculate the color CRT electron gun system in detail. The curves of magnification, spherical aberration and space charge effect were obtained. From the above results, we can see their influence on the beam spot size of the upper screen. From these curves Find the structure that minimizes the beam spot on the screen.