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采用微扰方法，对有机分子膜中分子规则取向所导致的各向异性进行了研究．给出了有机分子膜的二次谐波强度与基频光和倍频光的偏振方向，以及基板的拉膜方向之间关系的理论表达式，并对常见的几种组态进行了讨论和实验研究．理论计算和实验结果相一致
The perturbation method was used to study the anisotropy caused by the regular molecular orientation in organic molecular films. The theoretical expression of the relationship between the second harmonic intensity of organic molecular film and the polarization direction of fundamental frequency and frequency doubling light and the direction of the drawn film of the substrate is given and the common configurations are discussed Experimental Study. Theoretical calculation and experimental results are consistent