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NEC研制成功的高分辨率显示管用重叠型大口径电子枪(简称SFL电子枪),由于改进了聚焦特性和会聚特性,实现了大容量且高分辨率的高品质显示。 SFL电子枪采用降低象差的非对称预聚焦透镜,抵销自会聚偏转磁场所引起的电子束光点畸变的和重叠型大口径主电子透镜。
NEC developed a high-resolution display tube with overlapping large-aperture electron gun (SFL electron gun for short), achieving high-quality large-capacity and high-resolution display due to its improved focusing and convergence characteristics. SFL electron gun uses an asymmetric prefocus lens with reduced aberration to counteract the electron beam spot distortion caused by self-converging deflecting magnetic fields and overlapping large-aperture main electron lenses.