一、超高压电镜的发展概况 (一)目前超高压电镜已达到的水平 所谓超高压电镜,现在尚无严格的科学定义,一般把加速电压超过500KV的电镜称为超高压电镜。加速电压在500KV至200KV之间的电镜称为高压电镜。加速电压低于200KV称为普通电镜。目 First, the development of ultra-high voltage electron microscopy (a) the current level of ultra-high voltage electron microscope has reached the so-called ultra-high voltage electron microscope, there is no strict scientific definition, the general acceleration voltage over 500KV electron microscope called UHV electron microscope. Acceleration voltage 500KV to 200KV between the electron microscope called high-pressure electron microscope. Acceleration voltage is lower than 200KV called common electron microscope. Head