基于几何光学的泡沫滴/水滴光散射计算模型  

Geometrical optics based light scattering computational model for foam/water drop

作　　者：迟卫[1] 王吉心[1] 王涌[1] 兰国辉 金良安[1] 

机构地区：[1]海军大连舰艇学院,辽宁大连116018

出　　处：《应用光学》2014年第3期404-408,共5页Journal of Applied Optics

摘　　要：为深入研究舰船泡沫-水两用幕的光衰减机理,建立了基于几何光学的泡沫滴/水滴光散射强度分布计算模型。利用该模型对液相折射率m2为1.20至1.50范围内、气泡相对半径r为0至0.99的球状泡沫滴和水滴、散射角τ为1°至10°内的光散射强度进行了数值计算。结果表明,泡沫滴/水滴对可见光具有强烈的散射作用,τ内的散射强度与入射光强度之比Tτ随τ的增大而提高,最高可增加2个数量级;随m2的增大而降低,m2从1.30至1.40变化,Tτ降幅最高达11.6%;随r的增加先下降而后提高,达到最低0和最高80.8%;Tτ最低值对应的最优气泡半径ro随m2的降低和τ的增大而提高,从0.1最多增至0.4。该结论可为舰船泡沫-水两用幕技术的发展提供必要的理论基础。For the purpose of studying light attenuation principle of warship foam-water dual-purpose curtain ,the visible light scattering model was established for calculating the optical scattering intensity distribution based on geometrical optics . Light intensity scattered by spherical foam/water drop restricted by scattering angle τfrom 1° to 10° ,relative bubble radius r from 0 to 0 .99 and liquid refractive index m2 within 1 .20 to 1 .50 was calculated using the computational model above .Results show that light is scattered strongly by the foam/water drop .The ratio of scattering intensity to incident intensity Tτincreases by at most 2 orders of magnitude along with the increase of τfrom 1°to 10° . Tτreduces up to 11 .6% along with the increase of m2 from 1 .30 to 1 .40 .Tτfirstly declines and then increases to the extent of 0(mini-mum) and 80 .8% (maximum) with the increase of r .The optimized bubble radius ro ,corre-sponding to the lowest Tτvalue ,enlarges from 0 .1 to 0 .4 with the increase of scattering angle and the decrease of liquid refractive index .The research can provide theoretical foundation for the development techniques of warship foam-water dual-purpose curtain .

关 键 词：几何光学 光衰减 泡沫-水两用幕 光散射 泡沫滴/水滴 数值计算 

分 类 号：O435[机械工程—光学工程]