光电探测器上多组圆环条纹的现象与机理

Phenomenon and mechanism of multi-group circular fringes on the optoelectric detector

在开展激光对光电成像系统的干扰实验时,观察到光电探测器上多组圆环条纹并存的现象,并采用对光学系统拆解、测量、建模重构和光线追迹的方法揭示了每一组圆环条纹的产生机理。首先,对实验所用的光学系统进行拆解,测量各个镜片的曲率半径、厚度、通光孔径等几何结构参数,并采用TRACEPRO光线追迹软件建立了该光学系统的理论模型。基于该光学系统模型,追迹大量光线经光学系统传输后在光电探测器上的能量分布,分析每一种能量组分的来源,发现多组圆环条纹的出现是由于不同激光能量组分的干涉效应而产生的,并揭示了产生每组圆环条纹的对应能量组分。文中的研究结果可为激光对光电成像系统的干扰效果评估提供技术支撑。

The multi-group circular fringes on the optoelectfic detector were observed in the experiment of laser disturbing optoelectric imaging systems. The method of disassembly, measurement, modeling and ray tracing of optical system was used to investigate the formation mechanism of multi-group circular fringes. First of all, the radius of curvature, thickness, pupil of every lens were measured and the model of optical system in TRACEPRO software was built. Based on the model, large number of random rays to propagate in the optical system were traced secondly and the energy distribution on the optoelectric detector was obtained. By analyzing the origin of every energy component, it was found out that the multi-group circular fringes were caused by interference effect of the different energy component on the optoelectric detector. The research results can provide the technical support for evaluating laser disturbing effect on optoelectric imaging systems.