电子显微镜是研究超微观结构,揭示“超微观世界”的高精密电子仪器。目前利用高分辨电镜已能观察到原子级的显微组织结构,最高晶格分辨本领达到O.74(?),点分辨本领为1～3(?)。但要获得这样高的分辨率图象是很不容易的。它不但取决于仪器本身的性能及操作技术,还取决于仪器周围的环境是否被“污染”,这种污染主要来源于震动、噪音及杂散电磁场的干扰。本文就有关杂散电磁场的产生及其对电子显微镜图象质量的影响作简单介绍。一、杂散电磁场的产生及性质所谓杂散电磁场就是存在于仪器周围空间的随机漂移的电磁场。它的存在,强度与 Electron microscopy is a study of ultramicrostructures that reveal the “ultra-microscopic world” of high-precision electronic instrumentation. At present, high-resolution electron microscopy has been able to observe the atomic structure of the microstructure, the highest lattice resolution ability to achieve O.74 (?), Point resolution is 1 ~ 3 (?). However, it is not easy to obtain such high resolution images. It depends not only on the performance of the instrument itself and the operation of the technology, but also on the environment around the instrument is “contaminated”, this pollution comes mainly from vibration, noise and stray electromagnetic interference. This article gives a brief account of the generation of stray electromagnetic fields and their effects on the quality of electron microscopy images. First, the stray electromagnetic field and the nature of the so-called stray electromagnetic field is present in the instrument around the random drift of the electromagnetic field. Its existence, strength and