利用特征矩阵法，分别研究了不同偏振方式的波入射到光子晶体时，光子晶体的禁带随入射角度的变化。结果表明：不论是TM波入射还是TE波入射，随着入射角度的增大，光子晶体的带隙都向短波方向移动；TM波入射时，光子晶体的带隙随入射角度的增大而减小，而以TE波入射光子晶体时，随着入射角度的增大，光子晶体的带隙逐渐增大。

The relationship of photonic band gap characteristics of photonic crystals and the different incidence angle were researched by characteristic matrix method. The result shows that the photonic band gap of 1D photonic crystals moves towards shortwave when incidence angle increase, no matter the incidence wave is TM wave or TE wave; the photonic band gap of 1D photonic crystals of TM wave decreases when the incidence angle increase, the photonic band gap of 1D photonic crystals of TE wave increases when the incidence angle increase. This work provides a valuable reference to the design and application of infrared camouflage using one dimensional photonic crystals.