烟幕干扰光电设施的效果与其组成成分密切相关。以NaCl为填料,从水雾的光学和微物理特性角度,分析微粒消光特性的主要影响因素,通过实验比较不同浓度、不同用量和不同靶温条件下NaCl水雾对中远红外辐射的衰减性能,实验表明增大NaCl溶液的浓度和用量有利于提高水雾的消光能力,NaCl水雾对高温目标的近红外辐射衰减能力更强些。应用米式理论,对粒径服从对数正态分布的水雾在红外传输窗口的消光性能进行了计算和分析,波长分别为3.5μm和10.591μm时,其透过率分别为38%和55%,提出选用具备良好电磁特性和悬浮性能的干扰填料是增强水雾干扰性能的有效途径。

The electro-optical effect of jamming smoke screen depends on the composite of the smoke agent.The paper introduced the influence factors of IR extinction property with the investigations of optical and microphysical characteristics of aerosol.Take NaCl as the filler,and compare the attenuation performance of NaCl water vapor on infrared radiation under different concentration,dosage and target temperature conditions by experiment.Experimental results show that increasing the concentration and dosage of NaCl aerosol is good for enhancing extinction ability of water fog.IR extinction performance was calculated and analyzed according to Mie theory for water vapor whose granularity distributing keeps up logarithm normal distribution.The transmissivities are 38% at 3.5μm and 55% at10.591μm,respectively.At last,the approach to choose interference filler with good electromagnetism and suspending characteristics is put forward.