随着电子计算机的广泛应用,越来越多的信息以电的方式进行处理,处理的结果用电子显示方式表示出来,为了保存显示出来的图形、数据资料,广泛使用阴极射线管光电记录方法。这类应用相当普遍,象地球资源、气象情报、档案情报、杂志和出版等等,都用它作为信息 With the widespread application of electronic computers, more and more information is processed by means of electricity. The result of the processing is indicated by electronic display. In order to save the displayed figures and data, cathode ray tube photoelectric recording method is widely used. This type of application is quite common, with information like Earth’s resources, meteorological information, archival intelligence, magazines and publications etc.