各向异性粗糙海面对掠入射激光的散射特性研究  

Grazing incidence laser scattering characteristics of anisotropic rough sea surface

作　　者：王新涛[1] 屈惠明[1] 曲红星[2] 龚靖棠 王琳[2] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]中国人民解放军总参谋部陆航研究所,北京101121

出　　处：《红外与激光工程》2013年第11期2935-2939,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(61171164);装备预研基金(62201050103)

摘　　要：针对目前粗糙海面的激光散射场模型并不适用于激光束掠入射的情况以及忽略风速的影响,基于Cox-Munk模型及基尔霍夫近似(KA)模拟各向异性粗糙海面,建立海面对掠入射激光束的方向反射率分布模型,仿真分析了方向反射率随风速、风向、入射角、入射方位角、反射角、反射方位角的变化规律,并通过水池实验进行了验证。结果表明:粗糙海面对激光束的散射能量主要分布在以被照射海面为顶点的圆锥形角空域,此空域角方向位于镜面反射方向附近,且随着风速的增加,空域角逐渐变大,对于掠入射的激光束,由于海浪的遮蔽效应,空域角方向会偏离镜面方向。该模型可以为激光半主动制导导弹对海上小目标射击研究以及利用激光束照射粗糙海面布设激光诱饵研究提供一定理论依据。In light of the laser scattering field model of the rough sea surface is not suitable for laser beam grazing incidence and ignores the influence of wind speed, based on the Cox-Munk and kirchhoff approximation （KA） simulation model of anisotropic rough sea, directional reflectance ratio distribution model for grazing incidence laser beam was set up, change law of directional reflectance ratio vs wind speed, wind direction, incident angle, incident position angle, reflection angle, reflection position angle was simulated, and the result was verified by pool experiments. Results show that the laser energy scattering of rough sea surface mainly distributes in the conical space angular which in order to irradiated surface for a vertex, this space angular direction locates near the specular reflection direction, as the wind speed increases, space angular becomes larger, for grazing incidence laser beam, due to the shielding effect, the direction of space angular away from the specular direction. The model can provide certain theoretical basis for the research of semi-active laser guided missile shooting small targets at sea and layout of laser decoy in rough sea.

关 键 词：方向反射率 粗糙海面 掠入射 激光半主动制导 

分 类 号：TN977[电子电信—信号与信息处理]