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为了能够准确获取“猫眼”光学系统激光反射回波信号方向性和发散度的信息,基于光学系统“猫眼”效应和高斯光束的变换规律,依据激光大气传输的衰减和强度闪烁特性,给出了激光主动探测系统回波能量衰减和起伏的数学模型。结合野外试验分别对焦平面光学系统和离焦光学系统的关键指标进行了工程计算、分析论证和比较,结果表明:在激光主动探测系统探测识别时,可根据回波信号强度来识别不同类型的目标;同时对激光在大气传输中能量的衰减和光强的起伏进行了工程计算和分析论证,结果表明:大气湍流会大幅度降低激光主动探测系统的探测距离。
In order to accurately obtain the information of the directivity and divergence of laser reflection echo signals of the cat’s optical system, based on the optical system “Cat’s Eye ” effect and the Gaussian beam transformation rule, based on the attenuation and intensity flicker characteristics of laser atmospheric transmission The mathematical model of the attenuation and fluctuation of the echo of laser active detection system is given. Combining with the field experiments, the key indicators of the focal plane optical system and the defocused optical system were respectively calculated, analyzed, and compared. The results show that different types of targets can be identified according to the echo signal intensity during the detection and recognition of laser active detection system At the same time, the energy attenuation and the fluctuation of light intensity in the atmospheric transmission are calculated and analyzed. The results show that the atmospheric turbulence can greatly reduce the detection range of laser active detection system.