法铁于今年3月19日,在4.8公里的距离上实现了使用光纤维远距离传输电视图像。为了对运行中的列车进行监督,必须使传输不受干扰,以获得正常速度运行列车的排列图像。该设备的原理如下:摄像机发射的电信息调制成光信息,该光信息由专门设计、直径比头发丝稍粗的一根玻 France Railway on March 19 this year, at a distance of 4.8 km to achieve the use of optical fiber transmission of long-distance television images. In order to supervise a running train, the transmission must be undisturbed in order to obtain an arrangement image of the train running at normal speed. The principle of the device is as follows: The electrical information transmitted by the camera is modulated into optical information, which is specially designed with a diameter slightly thicker than the hairline