前言最近不用影罩管而用红绿蓝三只单色阴极射线管的三管式显象管录象装置已付诸实用,人们正致力于改进图象质量,然而与磁带磁象机比起来图象质量差了。显象管录象用录象照相机对荧光屏上显示出来的图象进行再摄象,然而尽管纹细、效率高的荧光体已研 Foreword Recently, there has been practical use of a three-tube type video tube recorder which uses three green, red, green and blue cathode ray tubes without a shadow mask tube. People are working to improve the image quality. However, compared with a magnetic tape magnetism recorder Poor image quality. Videocassette video camera on the screen to display the image on the re-camera, however, despite the fine lines, the efficiency of the phosphor has been studied