(一)前言电视技术是用电子学方法传送图像的技术。它客观上使人的视觉机能在空间得到延伸。由于这一特性,它可用作远距离监视和不可视像的观察。再者图像的光信息变换成电信号后很易进行视频变换、组合、记录和再生等各种信息处理,并且与一定外围系统结合能完成较复杂的识别和控制功能。因此电视在工业、 (A) Introduction Television technology is the electronic image transmission technology. It objectively allows people’s visual function to be extended in space. Because of this feature, it can be used as remote monitoring and non-visual observation. Furthermore, it is easy to transform, combine, record, and reproduce various kinds of information after the optical information of the image is transformed into the electrical signal, and can be used to perform more complicated identification and control functions in combination with a certain peripheral system. Therefore, television in industry,