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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。
Time Delay Integration (TDI) detectors are widely used in low light imaging and space remote sensing and other fields. Such detectors can effectively improve the equivalent integral of the detector while maintaining the spatial resolution and the platform running speed Time, improve system imaging quality and detection rate. In recent years, infrared digital TDI detector has attracted more and more attentions due to its advantages of large dynamic range, continuously adjustable integrator series and high frame rate. Through the principle analysis and digital system design of TDI TDI technology, combining with the domestic 640 × 8 TDI detector design imaging system performance analysis and verification, focusing on the infrared digital TDI detection / imaging system Blind element compensation, non-uniform correction, pixel adjustment, time delay accumulation and over-sampling and other key technologies for the future of infrared digital TDI detector in the application of space remote sensing provides technical support.