对阿基米德斩波器及其工作状态进行了模拟,分析了探测器像元的曝光时间、曝光顺序、信号读出及其对后续信号均匀性处理的影响.结果表明:探测器曝光的非均匀性与信号读出模式直接影响后续信号的均匀性处理,阿基米德螺旋线的参数、探测器几何尺寸、斩波器与探测器的相对位置等均影响探测器的曝光顺序和电荷均匀性.在热成像系统总体设计以及电子处理系统?杓剖?必须综合考虑斩波器各参数的影响.

The Archimedes spiral cord modulating chopper's figure and its working states were simulated. The detector pixels' exposure time, exposal sequence, signal read-out mode and its impact on the following signal uniformity processing were analyzed. Result shows that the detector's exposure non-uniformity and the signal readout mode directly affect the following signal's uniformity processing; the parameter of Archimedes spiral cord, the detector's geometrical dimension, the relative position between the chopper and the detector will affect the detector′s exposal sequence and uniformity. We should synthetically consider the effect of the chopper's parameters when designing the whole thermal imaging system and electronic processing system.