日本电子公司的ＪＥＭ１２００ＥＸ电镜在拍摄电镜照片时，通过一个底片数据显示ＣＲＴ，可以将放大倍数、加速电压、显微标尺等数据及一行１２个字符的注释内容打印到底片的一个注释框中记录下来，这一功能为底片的保存提供了很大的方便。通常底片注释框在电镜安装时已由厂 Japanese electronics company’s JEM 1200EX electron microscopy in the filming electron microscopy, through a negative data display CRT, you can magnification, acceleration voltage, microscale and other data and a line of 12-character comments to the content of the film to a comment box Record, this feature provides a great convenience for the preservation of the film. Usually the film comment box has been factory installed by SEM