TDI CCD在面阵成像三维激光雷达中的应用

为了提高双通道增益调制型面阵成像三维激光雷达系统的测距精度，从系统结构的紧凑性方面考虑，基于TDI CCD能够利用驱动电路对同一点多级曝光信息进行累积的工作原理，提出了使用TDI CCD代替传统的CCD作为光脉冲探测器。根据该三维激光雷达测距原理，导出了成像系统测距公式和距离精度公式。研究了TDI CCD的级数和速度失配绝对误差对测距精度以及调制传递函数（MTF）的影响。分析结果表明:该方法不仅能使测距精度提高到原来的〖KF(〗M〖KF)〗倍，同时能舍弃额外的运动补偿装置，进行精确的前向运动补偿。

The Application of TDI CCD in Array Three dimensional Imaging Radar

In order to improve the ranging accuracy of dual-channel gain modulation array three-dimensional imaging radar system, taking into account the compactness of the system structure and based on the working principle of TDI CCD which can make use of drive circuit to cumulative exposure information of multi-level of the same point, CCD replaced by TDI CCD as photo detector is presented. According to the ranging principle of this three-dimensional radar, ranging formula and ranging accuracy formula of imaging system are derived. The impact of the level of TDI CCD and the absolute error of velocity mismatch on range accuracy and the modulation transfer function (MTF) is studied. And the analyzing result shows that the accuracy of the distance can be improved to times of the original by this method, and the high precision motion compensation can be realized without additional motion compensation device.