As a passive jamming method, the smoke screen has a dual function of hiding the real object and being a false target, which has become more and more popular in the modern war. The extinction mechanism of infrared smoke screen was analyzed. A simplified calculation model was built up, and the equation of radiative transfer was solved. The extinction perfornance of infrared smoke screen was calculated out theoretically, and the extinction performand was analyzed through an example. The results showed that theoretical calculation result agreed with the practical capability of extinction, which supplies a theoretical basis for the application of smoke screen in electro-optical measurement.%烟幕作为一种无源干扰手段,具有"隐真"和"示假"的双重功能,在现代战争中的作用越来越大,应用频率也越来越高.从分析红外烟幕的消光机理出发,通过建立简化的计算模型,在二流法下解辐射传递方程,理论上对红外烟幕的消光性能进行了计算,并通过举例对烟幕的消光性能进行了分析.结果表明:理论计算与烟幕的实际消光性能比较吻合,为烟幕在光电对杭中的应用提供了一定的理论依据.
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