摘要
本文将测量液晶介电系数ε的磁场法改进为半电压测量法。避开直接测量ε_∥和ε_⊥,而是通过测量ε_(45°)之值推算出ε_∥与ε_⊥。测量所需的液晶用量为磁场法的1/5,且在较弱的磁场下,即能获得较高的准确度。
The method in common use for measuring dielectric anisotropy of liquid crystals is the magnetic field method.In this article, the semi-voltage measuring method is introduced to replace the magnetic field method so that it is not necessary to measure ε_∥ and ε_⊥ directly. The parameters ε_∥ and ε_⊥ are derived from the measured value ε_(45°). The quantity of liquid crystal required for one measurement by this method is one fifth of that by the magnetic field method, and the result of higher accuracy can be obtained in weaker magnetic field.
关键词
液晶
介电系数
半电压测量法
liquid crystal
measurement methods
magnetic field intensity
dielectric coefficient
