为了减少烟幕温度对8-14μm波段烟幕透过率的影响,分析了有红外辐射源和没有红外辐射源的燃烧型红外烟幕的透过率。结果发现两种情况下5 g发烟剂被点燃后的透过率分别是40%-50%和15%-20%,燃烧形成的红外烟幕导致烟幕云团具有很强的红外辐射。为此提出了减差修正法,烟幕的透过率通过减去没有红外辐射源时的透过率得到修正,5 g发烟剂的透过率减小为25%-35%。 In order to reduce the influence of smoke temperature on the transmittance of the smoke screen in the 8-14μm band, the transmittance of the combustion type infrared smoke screen with and without infrared radiation source was analyzed. The results showed that the transmittance of 5 g smoke agent after ignition was 40% -50% and 15% -20% respectively in two cases. The infrared smoke formed by the combustion resulted in strong infrared radiation of smoke cloud. A subtraction correction method was proposed for this purpose. The transmittance of the smoke screen was corrected by subtracting the transmittance without infrared radiation source. The transmittance of 5 g smoke generator was reduced to 25% -35%.