利用偏光干涉理论,通过对BL-009型向列相液晶透射比的测试,分析了液晶透射比随电场的变化情况,对液晶的电控双折射效应进行了研究。在20℃下,利用岛津UV-3101PC分光光度计,通过改变加在液晶盒两端的电压,测出了入射光波长为1 330 nm和1 550 nm时液晶双折射率随电压变化的关系曲线。实验结果表明:当液晶盒两端加1 V电压时,入射光波长从1 310 nm到1 350 nm有一较稳定的高透射带;加2 V电压时,从1 520 nm到1 580 nm有一比较稳定的高透射带。 Based on the polarization interference theory, the transmission of the liquid crystal in the nematic phase of BL-009 was measured and the electric birefringence effect of the liquid crystal was studied. At 20 ℃, the Shimadzu UV-3101PC spectrophotometer was used to measure the birefringence of liquid crystal with voltage at a wavelength of 1 330 nm and 1 550 nm by changing the voltage applied across the cell. . The experimental results show that when the voltage across the liquid crystal cell is increased by 1 V, the wavelength of incident light has a relatively stable high transmission band from 1 310 nm to 1 350 nm. When the voltage is 2 V, a comparison is made from 1 520 nm to 1 580 nm Stable high transmission band.