光笔是一种手执的笔状光检出器。一般和图形显示器配合使用,可对计算机所需数据随时进行修改补充。将光笔对准阴极射线管的显示屏时,在光笔指点处的光点被光笔所感受,发出中断信号经程序翻译,使计算机很快将光笔所指位置的显示数据进行处理。常见的有:一种是光电元件受光后变为电信号,预放后送给计算机;另一种是光电信息通过光学纤维来送到光电倍增管,放大整形后送计算机。光笔上一般装 Light pen is a hand-held pen-like light detector. With the general use of graphics and display, the required data on the computer can be modified at any time to add. When the light pen is aligned with the display screen of the cathode ray tube, the light spot at the pointing position of the light pen is sensed by the light pen, and an interrupt signal is sent out to be translated by the program so that the computer can quickly process the display data of the position indicated by the light pen. Common are: one is the photoelectric components after receiving light into electrical signals, pre-released to the computer; the other is through the optical fiber optoelectronic information sent to the photomultiplier tube, enlarged plastic sent to the computer. Light pen on the general equipment