为了研究实际应用场景下光子晶体薄膜的红外隐身效果，选择具有中、远红外隐身性能的光子晶体薄膜和低发射率薄膜，以某吉普车的引擎舱为研究对象，分析了贴附薄膜后目标的自身辐射和反射环境的辐射对隐身效果的影响。设计并制备了一种具有中、远红外隐身效果的光子晶体薄膜，分别于白天和晚上在室外进行实验，测试了光子晶体薄膜以及低发射率薄膜对引擎舱隐身效果的影响。研究结果表明，太阳辐射对光子晶体薄膜中、远红外隐身效果影响较小，且光子晶体薄膜能够更好地实现目标与背景融合，综合来看光子晶体在中、远红外隐身效果优于低发射率薄膜。

In order to study the infrared stealth effect of photonic crystal films in practical application scenarios， photonic crystal films and low emissivity films with mid- and far-infrared stealth performance were selected， and the engine compartment of a Jeep was taken as the object of study to analyze the effects of self-radiation and radiation from the reflected environment on the stealth effect. A photonic crystal film with mid- and far-infrared stealth effects was designed and fabricated， and then the effects of the films on the stealth effect of the engine compartment were tested during daytime and nighttime， respectively. The results show that solar radiation has less influence on the mid- and far-infrared stealth effect of photonic crystal films， and that photonic crystal films can better achieve object and background fusion. The work demonstrates that photonic crystals are better than low emissivity films in mid- and far-infrared stealth.