热释电型非制冷焦平面热像仪调制斩波器的分析——斩波器与信号读出模式  

ANALYSIS OF MODULATING CHOPPER USED IN PYROELECTRIC UNCOOLED FPA THERMAL IMAGER——CHOPPER AND DETECTOR PIXELS' SIGNAL READOUT MODE

作　　者：何玉青[1] 金伟其[1] 高雅允[1] 刘广荣[1] 王霞[1] 

机构地区：[1]北京理工大学光电工程系,北京100081

出　　处：《红外与毫米波学报》2003年第6期423-427,共5页Journal of Infrared and Millimeter Waves

基　　金：863计划 3 0 8主题 (批准号 863 3 0 8 16 2 (4 ) )资助项目~~

摘　　要：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设计时 ,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.

关 键 词：热释电效应 非制冷焦平面探测器 斩波器 阿基米德螺旋线 像元曝光顺序 曝光时间 

分 类 号：TN216[电子电信—物理电子学]