摘要
根据长波红外相机积分时间短的特点,阐述了多次采样叠加技术的原理和应用.并在此基础上分析了采用多次采样叠加技术对系统MTF产生的影响.给出了不同采样系数和叠加次数对应的系统MTF变化.当采样系数固定时,探测器MTF随叠加次数的增加而减小,系统推扫方向MTF随叠加次数的增加而减小.
According to the short integration time characteristics of long wave infra-red focal plane array, the principle and application of oversample-superpositon technique were discussed. The effect of oversample-superpositon on the MTF of system was analyzed on the basis of the chareaeteristics of LWIR FPA. The corresponding oversample-superpositon MTFs at different sampling and superpositon time were given. As the superposion time deereases, the detector MTF is reducing while system scanning MTF ix rising when the sampling time is fixed.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期13-16,共4页
Journal of Infrared and Millimeter Waves
基金
国防科研计划项目(863-2-7-4-19)
关键词
红外焦平面阵列
多次采样累加
调制传递函数
红外相机
IR focal plane array
oversample-superpositon
modulation transfer function（MTF）
long-wave infrared camera
