滞后,是摄象管的几个重要性能指标之一。在照明除去以后的若干帧内,摄象管仍有残余信号输出。滞后特性,通常就用残余信号和原来信号的比值随时间的衰变关系来表示。(图1)所表示出的就是R C A一种EBS摄象管的典型滞后特性。但经常人们还是更简单地 Hysteresis, is one of several important performance indicators of the video tube. Within a few frames after the illumination is removed, there is still residual signal output from the tube. Hysteresis characteristics, usually with the ratio of the residual signal and the original signal with the decay relationship over time to represent. (Figure 1) shows the typical hysteresis characteristics of R C A, an EBS tube. But often people are still simpler