实验研究了探测器增益对激光干扰效果的影响。测试了暗背景下、无激光干扰时CCD在不同增益下输出图像的噪声分布和灰度量级，确定了噪声灰度均值随CCD增益增加的变化关系。通过比较不同增益下的激光光斑图像和灰度分布，发现增大CCD增益，可以放大激光主光斑周围的弱光信号，增加饱和像元数，增大干扰面积，提高激光对CCD的干扰效果，并确定了信号灰度随CCD增益增加的变化关系。基于信号、噪声灰度与CCD增益之间的变化关系，实现了不同增益下激光干扰效果的仿真。该研究结果可为评估光电成像系统在不同增益下的激光干扰效果提供技术支持和理论参考。

The influence of detector’s gain on laser disturbing effect has been investigated in the experiment. We firstly measure the noise distribution and grey scale of output image under the different CCD gains, and then define the variable relation of noise grey scale with the increase of CCD gain. According to comparing laser spot image and grey scale distribution under the different gains, it is secondly found that the increase of CCD gain can amplify the weak signal around laser main spot, add the number of saturated pixel and enhance laser disturbing effect. The variable relation between signal grey scale and CCD gain has been also defined by calculating signal grey scale. At last, it is can be achieved to simulate laser disturbing effect under the different gains based on the relation of signal/noise grey scale and CCD gain. The research results can provide technical support and theoretical reference for evaluating laser disturbing effect of electro-optical imaging system under the different gains.