一种CRT光点测量集成化系统

An Integrated CRT Spot Measurement System

利用彩色电视机中的部分电路和设计相关的脉冲处理电路 ,研发一种简便适用且集成化的光点发生器 ,提供 CRT阴极负向高压视频脉冲和产生 CRT各电极电压 ,屏显示刷新率为 5 0 Hz的稳定光点。CCD同步摄取光点图像 ,经计算机处理分析后计算二维光点尺寸 ,显示器输出三维光点光分布的图像和二维光点尺寸的计算结果。实验结果表明 ,该测量系统完全可应用于实际的光点测量 ,为验证

Based on the parts of the circuits in a color TV set and the pulse process circuits designed relatively,an integrated spot generator that is simple and applicable is developed.It can yield the video pulse with negative going high voltage to drive CRT cathode and produce the voltages required in CRT electrodes .So a stable spot with 50Hz refreshing rate is displayed on the screen.CCD picks up the spot image synchronously,and the spot sizes in two dimensions are calculated after the personal computer processes and analyzes the spot.The monitor gives the light intensity output of the spot image in three dimensions and the calculation result of the spot sizes in two dimensions.The experiments have demonstrated that this measurement system is totally suitable to the spot measurement in practice.It supplies an available way for verifying the characteristics of electronic guns in CRT.