本文介绍美国、西欧和日本已研制成功并广泛使用的飞点扫描器。这些扫描器精度高、速度快、稳定性好。其光点在七英寸或九英寸的阴极射线管靶面上,能精确地定位在32768×32768个点位的任一位置上,这是通过计算机联机控制的局部扫描实现的。局部扫描的突出特点是能随机存取被扫描的图象信息,避免在整个靶面上逐行扫描。本文还介绍了日本最新型的双偏转阴极射线管的特点,最后给出总方框图。 This article describes the flying spot scanners that have been developed and used extensively in the United States, Western Europe and Japan. These scanners have high accuracy, high speed and good stability. The spot on a seven-inch or nine-inch cathode ray tube target surface, can be accurately positioned in any position 32768 × 32768 points, this is by computer online control of the local scan achieved. The outstanding feature of the local scan is the random access to the scanned image information, to avoid progressive scan of the entire target surface. This article also introduces the characteristics of Japan’s latest double-deflection cathode ray tube, and finally gives the general block diagram.