向列相液晶电热光效应的实验研究

通过研究在变化的温度下向列相液晶BL-009的电控双折射率特性,探讨了向列相液晶的电热光效应。实验上采用简单、精确的偏光干涉法,在入射光波长为630nm、测出从室温 20℃～100℃时,液晶的透射率随温度的变化曲线。从而得到液晶电控双折射率随温度的变化曲线。分析实验数据可知,液晶的电控双折射率随温度的升高,在外加电压值不同时具有不同的变化规律。此实验结果对液晶器件的设计、制作、使用都具有一定的参考价值。

Experimental study of electric-termo-optic effect of nematic liquid crystal

The termo-optic effect of nematic liquid crystal(LC)(BL-009)is probed by studying the birefringence of LC as the temperature varies.The simple and precise polarized interference method is employed to measure the birefringence of the LC.The transmissivity of the LC is measured as temperature varies from 20℃ to 100℃,the wavelength of the incident light is 630nm,so electric control birefringence of the LC is obtained as temperature varies.After analysing the experimental data,it is found that the law of the falling of electric control birefringence is different when the applied voltage is different.The obtained result is favor of the design and manufacture,application of LC device.