【摘要】 电子枪聚焦性能是由电极结构决定的。本文通过计算机模拟的方式对３种典型的用于大屏幕彩色显像管电子枪的光点形貌进行了系统的模拟。对各电子枪聚焦特性进行的分析和比较表明电子束形成区、主透镜结构对屏幕中心、角部的着屏光点及不同电流下聚焦的稳定性都有较大的影响。更多还原

【Abstract】 The focusing performance of electron gun is decided by the structure of electrodes. In this paper, the beam spots of three typical guns for large screen CPT (color picture tube) are simulated systemically. The analysis and comparison of the three electron guns’ focusing characteristic show that the BFR(beam forming region) and the structure of mian lens are deeply affect the landing spots both at the screen center and at corner and also affect the focusing stabilization at different currents.更多还原