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“猫眼”效应现象现已广泛应用于激光主动探测。为了更好地分析基于“猫眼”效应的探测系统的性能,分别采用几何光学与物理光学模型对目标回波功率进行理论分析,建立模型实现数值计算。针对轴上光束在不同传输距离、探测器光敏面分别处在光学系统焦平面和偏离焦平面情况的回波功率做了对比研究,并搭建探测系统进行了实验测试。研究结果表明:探测距离大于100m时,两种模型计算的回波功率吻合较好;小于100m时则存在明显差距;近距离时实验结果与几何模型计算数值更加接近,而远距离时物理光学模型计算结果、几何光学模型计算结果与实测数据非常接近。
“Cat’s Eye ” effect has been widely used in laser active detection. In order to better analyze the performance of the detection system based on the “cat’s eye” effect, the geometrical optics and the physical optics model are respectively used to theoretically analyze the target echo power and establish the model to realize the numerical calculation. Aiming at the contrast of the echo power of the axial beam at different transmission distances and the photosensitive surface of the detector at the focal plane of the optical system and the defocused plane respectively, the detection system was set up and the experimental tests were carried out. The results show that when the detection distance is more than 100m, the echo power calculated by the two models is in good agreement. When the distance is less than 100m, there is a significant difference. When the distance is close to the geometric model, the experimental results are closer to the numerical values. Calculation results, geometric optical model calculation results and the measured data are very close.