超连续谱激光干扰多色CCD探测器建模仿真研究

摘要

Considering the spectral characteristics of super-continuum laser and the signal conver-sion mechanism of multi-color charge coupled-device (CCD) detector ,the simulation model of multi-color CCD detector imaging under super-continuum laser jamming was built .On the basis of the working principle of multi-color CCD ,the transfer and transport rules of saturated and crosstalk signal were theoretically analyzed .Then ,according with the structure of multi-color CCD ,the spatial distribution characteristic of laser energy on the CCD surface was studied with the aid of optical design software .Taking into account the above researches ,the simulation mod-el of monochromatic CCD saturation crosstalk effect interfered by super-continuum spectrum la-ser was established ,based on this ,combined with the CCD imaging multi-color visualization principle ,it was realized to simulate the multi-color CCD output image interfered by super-con-tinuum laser .Finally ,the influence of different laser energy on the image quality of multi-color CCD was studied by introducing the image quality evaluation factor .Experimental result indi-cates that the laser power density is an important influence factor of the laser interference effect .As the laser energy increases ,the image quality of the multi-color CCD decreases .%结合超连续谱激光器光谱辐射特性及多色CCD信号传递转换机理,建立了激光干扰多色CCD成像仿真模型.依据多色CCD工作原理,理论分析了饱和串扰信号转移规律;根据多色CCD结构,借助光学专业设计软件实现CCD像面激光能量空间分布特性研究;综合考虑饱和串扰信号转移规律及CCD像面激光能量空间分布,建立了超连续谱激光干扰单色CCD饱和串扰效应仿真模型,在此基础上结合多色CCD成像多色可视化原理,实现超连续激光干扰多色CCD输出图像仿真.最后,引入图像质量评价因子,研究了不同激光能量对多色CCD输出图像质量的影响.实验结果表明:激光功率密度是激光干扰效果的重要影响因子,随着激光能量增大,多色CCD输出图像质量下降.