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激光干扰是对抗成像观瞄设备和精确制导武器,保护己方目标的重要方式。目前,对图像传感器的干扰效果研究主要集中在CCD相机和CMOS相机,对TDI-CCD相机干扰效果的研究较少。为了研究激光对TDI-CCD图像传感器的干扰效果,利用1.06μm高重频激光开展了对TDI-CCD相机的饱和干扰实验研究。实验中测量并计算了TDI-CCD相机的图像饱和及过饱和激光功率密度阈值,分析计算了饱和干扰象元数与激光入射功率之间的关系,TDI-CCD相机工作行频与干扰效果的关系。解释了副光斑、过饱和现象及圆环状光斑的形成原因。实验结果表明,1.06μm激光对TDI-CCD相机饱和干扰阈值为7.9×10-4W/cm2,过饱和干扰阈值约为4.7 W/cm2,1.06μm激光可作为对抗TDI-CCD相机的有效干扰手段。
Laser interference is an important way to confront imaging viewing equipment and precision-guided weapons to protect one’s own goals. At present, the research on the interference effects of image sensors mainly focuses on CCD cameras and CMOS cameras, and there are few researches on the interference effects of TDI-CCD cameras. In order to study the interference effect of laser on TDI-CCD image sensor, the experimental study on the saturation of TDI-CCD camera was carried out by using 1.06μm high repetition frequency laser. The thresholds of image saturation and supersaturation laser power density of TDI-CCD camera were measured and calculated in experiment. The relationship between the number of saturated interference pixels and laser incident power was analyzed and calculated. The relation between the working frequency of TDI-CCD camera and the interference effect . Explain the side spots, supersaturation phenomenon and the formation of annular spot. The experimental results show that the saturation interference threshold of TDI-CCD camera with 1.06μm laser is 7.9 × 10-4W / cm2 and the supersaturation interference threshold is 4.7W / cm2. The 1.06μm laser can be used as an effective interference measure against TDI-CCD camera.