为了验证激光辐照CCD时产生的串音饱和现象, 从理论上给出了单束激光辐照下CCD发生串音饱和时的物理模型, 并在此基础上给出了两光束入射情况下CCD发生串音饱和时的物理模型。通过定量计算得到了激光入射能量密度与CCD饱和像素数量的关系曲线和具体数据, 并通过实验进行了验证。理论和实验结果表明, 入射激光功率密度与CCD饱和区域面积之间呈非线性关系。当两束光同时进入CCD时, 其中一束光的功率的增加会对另一束光的探测起到明显的干扰作用。

In order to validate the crosstalk saturation when laser irradiating CCD system, a physical model of crosstalk saturation when single and double laser irradiating CCD system is built up. The relation curve of incident energy density and saturated CCD pixel number is achieved and experimentally verified. The theoretical and experimental results demonstrate that the relationship between incident laser energy density and saturated CCD area is nonlinear. When two light beams irradiate the CCD at the same time, increase of the incident energy density of one light beam will disturb the detection effect of another light beam.