聚合物分散液晶透射光散射特性随角度电压的变化

采用聚合物相分离法制备聚合物分散液晶(PDLC)薄膜，通过改变散射角，对散射光强随电压的变化进行了测试。实验结果表明，在角度小于26°时，外加电压为10 V处出现一个散射强度极小值；当角度超过26°时，外加电压为10 V处散射光强最大。在不同的散射角下，散射光强随外加电场的变化趋势有明显差异。散射角在0°~5°角范围内蓝光的光强随外加电压的增加一直增大；在6°~25°范围内，散射光强随外加电压的增大先增大后减小，并且最大波峰时的电压随着角度的增加而减小;当散射角大于26°时，蓝光的光强随着电压的增大而减小。采用单散射理论对实验现象进行了分析和讨论。

Scattering Properties of Polymer Dispersed Liquid Crystal with Different Angles and Voltages

The scattering property of polymer dispersed liquid crystal (PDLC) film is tested at different angles and voltages. The film is prepared via polymerition induced phase seperation method. At the 10V voltage, scattering intensity attains to the minimum when the angle is less than 26°. In contrast, the maximum appears when the angle degree exceeds 26°. In addition, the data depending on changes of applied electric field reveals a significant difference of scattering spectra in different angles. Blue light intensity increases at higher level of external voltage between 0°~5°. Ranging from 6°~25°, the intensity of scattered light increases with voltage at first and then decreases. And the magnitude of voltage in the big wave peak increases when angle degree decreases. When the scattering angle is greater than 26°, the intensity of blue light decreases with the increase of voltage. Single scattering theory is adopted to discuss and analyze the phenomenon.