一、前言 录像磁带磁层的缺陷可以造成磁带的信号失录:单位时间内失录数目的多少是衡量录像磁带质量好坏的一个重要参数。因此已有不少人采用不同方法对磁带磁层的缺陷进行了研究,探索缺陷形成的各种原因,以便尽量减少磁层的缺陷。主要的方法有:用光学显微镜、扫描电子显微镜直接观察磁层的缺陷和从录像磁带失录信号的波形去分析磁层的缺陷等。 First, the preamble Video tape defects in the magnetic layer can cause the tape signal loss: the number of units per hour lost is a measure of the quality of video tape is an important parameter. Therefore, many people have used different methods to study the defects of the magnetic layer of the magnetic tape and explored various reasons for the formation of defects in order to minimize the defects of the magnetic layer. The main methods are: using optical microscopy, scanning electron microscopy direct observation of the magnetic layer defects and video tape from the waveform of the signal to analyze the loss of magnetic layer defects and so on.