用阴极射线管产生图像,尽管所显示的曲线图案可以相当复杂,但归根到底都只是用极短的直线段,一段一段紧凑地连接起来的。新近,美国加州的休斯飞机公司生产的CRT显示管:Congraphic—12,却是用一小段一小段的圆锥曲线去连接成所需的曲线。这就可以使显示的图案更复杂更多样化,而且还可以节省存贮10到100倍。 With cathode ray tube to produce images, although the curve pattern shown can be quite complex, but in the final analysis are only a very short straight line segment, a period of compact connection. Recently, the CRT display tube made by Hughes Aircraft Corporation of California, USA, the Congraphic-12, is connected to the desired curve by a short, short conical curve. This can make the display of the pattern more complex and more diverse, but also save 10 to 100 times the storage.