推扫成像中积分时间对孔径函数的影响分析  

Effect Analysis of Integral Time on Aperture Function of Push-broom Imaging System

作　　者：张滢清[1] 傅雨田[2] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021 [2]中科院上海技术物理研究所,上海200083

出　　处：《红外技术》2007年第3期147-150,共4页Infrared Technology

基　　金：华侨大学高层次人才科研启动金资助项目(编号:05BS302)

摘　　要：分析了线列推扫成像中,积分时间对采样孔径函数的影响。给出了在推扫方向上随着积分时间变化的梯形采样孔径函数,并根据该孔径函数,分析了积分时间和输入频率对截取过程中的调制传递函数值下降速度的影响,同时对细分采样叠加成像方式与积分延迟效应的类似性作了简要对比。这些分析有助于更清晰地了解推扫成像方式中积分时间对系统成像质量的影响。The effect of integral time on aperture function in linear detector push-broom imaging system is analyzed. A trapezia sampling aperture function which the shapes change with the length of integral time in direct of push-broom is presented. Based on the trapezia function, the effect of integral time and input frequency on the dropping of modulation transfer function value in truncation is analyzed, the result is similar to one of oversampling-superposition. The analysis way is help to understand the effect of integral time on the output quality in push-broom imaging system.

关 键 词：孔径函数 截取 推扫 积分时间 调制传递函数 

分 类 号：TN215[电子电信—物理电子学]