FEI-TECNAI-G20型与 HITACHI-HT7700型透射电子显微镜结构异同及维护

摘要

通过电镜的硬件结构和性能两方面对FEI－TECNAI－G20型六硼化镧灯丝透射电子显微镜和日立HT7700型钨灯丝透射电子显微镜进行比较。硬件结构上FEI－TECNAI－G20和 HT7700在光源，真空系统和成像系统上都有较大的区别，以至于在性能上都有着各自的优缺点；在仪器维护方面也有着异同。%This paper mainly describes the differences in structure and the comparison of performance between FEI‐TECNAI‐G20 LaB6 transmission electron microscope and HITACHI‐HT7700 tungsten filament transmission electron microscope . They have differences in light source ,vacuum system ,imaging system ,so the performance and the maintenance also have some differences .