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应用自动化椭圆偏振光谱和紫外－可见光谱表征了两种芳香族共聚酯液晶的光学性质,发现由于分子结构和受激发电子振动跃迁的不同,使共聚酯液晶薄膜具有不同的折射率变化,产生不同的光学色散现象.“,”The optical properties of two thermotropic liquid crystalline copolyesters were characterized by spectroscopic ellipsometry and UV?visible spectroscopy.The differences in the refractive index variation and chromatic dispersion have been revealed and discussed in terms of differences in the vibrating transition of excited electrons and the molecular structures of the polymers.??