The two dichroic ratio is the key parameter determination of molecular orientation,this paper uses electromagnetic wave theory of Langmuir-Blodgett molecules in membrane in random orientation model,uniaxial orientation mode and biaxial orientation mode under the condition of polarized absorption two dichroic ratio and angular relationship between the molecular axis orientation.%二向色比是测定分子取向的关键参量,本文利用电磁波理论推导了Langmuir-Blodgett膜中分子在随机取向模式、单轴取向模式和双轴取向模式等情况下偏振吸收二向色比与分子轴取向角之间的关系。
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