基于漫反射探测的全向激光告警性能分析

为了通过对基于漫反射探测的全向激光告警系统性能的分析,进而达到对系统性能优化的目的,采用理论推导和实验分析的方法,讨论了普通鱼眼镜头的成像规律,得出了系统所使用的鱼眼镜头的成像规律。推导了全向激光告警系统中探测器接收到的漫反射信号功率公式,讨论了鱼眼系统像面照度均匀性,分析了系统中CCD成像特性,得出光斑成像像素个数的公式。采用针对不同成像像素数,得出不同CCD成像面上单像素所探测到的光斑功率公式的方法。得到了不同传输距离时,光斑成像的像素数与探测器距光斑距离d的关系图;不同的能见度条件下探测器所探测到的单个像素功率与传输距离R的关系图;以及在能见度和传输距离一定的条件下,探测器单个像素功率随距离d的变化图。研究结果对于基于漫反射探测的全向激光告警系统设计和研制,优化系统性能具有重要帮助。

Study on capability of omni-directional laser warning system based on diffuse reflection detection

In order to optimize an omni-direction laser warning system based on diffusive reflection detection,using the method of theoretical derivation and experiment analyzing,the imaging rule of a fish-eye lens was deduced and discussed by means of theoretical derivation and experiment.The power function of the receiving signal was deduced.The illumination uniformity of the image-plane and imaging characteristics of CCD were discussed.The formula of the number of imaging elements was deduced.For different imaging elements,the power formula of one imaging element was put forward.The graphs of relation between the number of imaging elements and the distance d between the detector and the facula was provided.At different visible range,the graphs of power of one imaging element related with the transmission distance R and with distance d were shown.The obtained results offer performance guidance for design,development and optimization of an omni-direction laser warning system based on diffusive reflection detection.