环境杂散磁场影响电镜成像质量,在放大倍数高时更为严重。因此,在电镜安装和使用中,都要进行环境杂散磁场的测量。本文介绍一种测磁线圈的制作和计算。一、杂散磁场对电镜成像的影响: 我们曾在S—450扫描电镜和H—600透射电镜上做过试验,人为地加一个交变杂散磁场,这时拍下来的照片图象有严重畸变。图1为S—450没有受交变杂散磁场干涉的 Ambient stray magnetic fields affect the quality of electron microscopy imaging and are more severe at high magnification. Therefore, in the electron microscope installation and use, we must carry out environmental stray magnetic field measurement. This article describes a magnetic coil manufacturing and calculation. First, stray magnetic field on the impact of electron microscopy imaging: We have done in the S-450 SEM and H-600 TEM experiments, artificially add an alternating stray magnetic field, then photographed the photo image is serious distortion. Figure 1 shows that S-450 is not affected by alternating stray magnetic fields