“猫眼”目标探测距离方程

利用矩阵光学方法对探测过程进行了建模，对探测距离方程进行了推广，使方程适用于猫眼光学系统离焦、探测光束斜入射的一般情况，通过室外探测实验对探测距离方程进行了验证。理论分析和数值计算表明:回波方向相对于入射光方向存在微小的回波方向偏差角，但相同条件下回波发散角要远大于回波方向偏差角，使回波足以形成对探测系统的覆盖；在相同的探测参数条件下，回波功率只与猫眼光学系统焦距和离焦量有关，而与探测光束入射角、猫眼光学系统接收孔径无关。

Detection range equation of cat-eye target

The detection range equation of cat-eye target was extended by modeling the detection process based on matrix optics, which can be applied to the situation that the cat-eye optical system had out-of-focus reflecting element and the detection beam was oblique incidence. The detection range equation was verified by field experiment. The results prove that there is small drift angle between the incidence beam and echo beam and the echo divergence angle is much larger than the echo drift angle, which makes the echo beam be large enough to cover the detection system. On conditions of the same detection parameters, the echo power is only related to the focal length and defocusing amount of the cat-eye optical system and has nothing to do with the incidence angel of detection beam and the receiving aperture of the cat-eye optical system.