为了实现对目标进行高信噪比、高时间分辨率的探测，近年来数字时间延迟积分技术（ TDI）逐步应用于面阵探测系统。结合自行研制的 CMOS探测器，搭建测试平台，对面阵探测系统的扫描成像方式进行深入研究。重点针对数字时间延迟积分技术（ TDI）对面阵探测系统信噪比提高的分析，结合试验研究系统信噪比提高倍数与数字 TDI级数 M的关系，并对探测系统时间分辨率与数字 TDI级数 M的关系进行讨论。引入数字 TDI及多帧叠加两种图像信息获取方式的对比，分别对特定目标获取图像的噪声特性及非均匀性对比分析。

In order to achieve the high SNR and high temporal resolution, the digital domain time-delay integral（TDI）technology is gradually applied to focal plane array（FPA）imaging system in recent years. The scanning imaging method with FPA is researched, focusing on the analysis of the improvement of SNR combining with the CMOS imaging system. It has been done that in-depth analysis of the relationship between SNR, temporal resolution and the digital domain time-delay integral stage M. An innovative comparison of the digital TDI and staring superposition imaging method is introduced.