中波红外数字域640×8 TDI成像系统设计及验证

Design and Verification of Imaging System with Mid-Wave Infrared Digital Domain 640×8 TDI Sensor

摘要:

时间延迟积分(Time Delay Integration,TDI)探测器被广泛应用于弱光成像和航天遥感等领域,这种探测器能够在保持空间分辨率和平台运行速度的条件下有效提高探测器的等效积分时间,提高系统成像质量和探测率。近年来,红外数字域TDI探测器因具有动态范围大、积分级数连续可调和高帧频等优点而受到越来越多的关注和研究。通过对红外数字域TDI技术进行原理分析和数字系统设计,结合国产640×8中波红外数字域TDI探测器设计成像系统进行性能的分析及验证,重点研究了红外数字域TDI探测/成像系统的盲元补偿、非均匀校正、像元调整、时间延迟累加和过采样等关键技术,为未来红外数字域TDI探测器在空间遥感中的应用提供了技术支持。

Abstract:

Time delay integration (TDI) sensors are widely used in low-light imaging and aerospace remote sensing. The equivalent integral time of the detector is effectively improved under the condition of keeping the spatial resolution and system scanning speed, thus the imaging quality and detection rate are improved. In recent years, the infrared digital domain TDI detectors attract much more attention due to their high dynamic range, continuous adjustable integrating stages and high frame frequency. In this paper, designed is a mid-wave infrared digital TDI imaging system using domestic digital TDI detector and infrared TDI technology was studied in detail, with considering the characteristics such as blind compensation, non-uniformity correction, and pixel adjustment adapting to different scanning direction.