长波红外相机细分采样迭加像元传递函数分析

Analysis of oversample-superposition pixel transfer function with long wave IR camera

根据长波红外探测器的特点,阐述了细分采样迭加技术的应用目的和原理,在像元传递函数(PTF)的基础上分析细分采样和迭加对PTF的影响,给出了不同细分倍数m对应的细分采样迭加PTF。随着m的增加,推扫采样方式由单次瞬时采样(m=1)转变为全驻留时间积分采样(m趋于无穷大)。当细分倍数m>4时,PTF的变化已经不明显了。

The principle and application purpose of oversamplesuperposition technique are discussed based on the characteristics of long wave IR detector. The effects of oversample and superposition are analyzed on the basis of PTF, and the corresponding oversamplesuperposition PTFs at different division multiples (m) are given. As m is increased, the pattern of pushingtype scan sample is varied from instantaneous single sample (m=1) to integral sample at full residence time (m is tended towards infinity). The variation of PTF is not distinct when m>4. 