提出了一种测试扭曲角和光延迟的新方法.该方法属于单波长测试法,具有3个特点:利用具有特殊摩擦方向(一个基板平行摩擦,另一基板环形摩擦)的液晶盒(CH-LC)作为偏振转换器件;利用扇形可变光阑和光探测器,一次性测得偏振方向从0到任意角度连续变化的线偏光通过被测液晶盒后的光强和;采用求光强比的方法消除了由于测试中仪器的吸收对光强的影响.扭曲角和光延迟作为拟合参数利用琼斯矩阵推导出的拟合方程用matlab进行曲线拟合求参数得到.实验证明采用该方法测得结果准确,操作简单快速,实验设备经济.
参考文献
| [1] | Lien A,Takano H.Cell gap measurement of filled twisted nematic liquid crystal displays by a phase compensation method[J].J.Appl.Phys.,1991,69 (3):1304-1309. |
| [2] | Zhou Ying,He Zhan,Sato Susumu.A novel method for determining the cell thickness and twist angle of a twisted nematic cell by stokes parameter measurement[J].Jpn.J.Appl.Phys.,1997,36 (5A):2760-2764. |
| [3] | Konovalov V A,Muravski A A,Yakovenko S Y E,et al.Accurate spectral method for measuring twist angle of TN cells with rubbed and grooved surfaces[J].Proc.SPIE,2000,4147:287-292. |
| [4] | Tang S T,Kwok H S.Transmissive liquid crystal cell parameters measurement by spectroscopic ellipsometry[J].J.Appl.Phys.,2001,89(1):80-85. |
| [5] | Jong Seok Chae,Soo Gil Moon.Cell parameter measurement of a twisted-nematic liquid crystal cell by the spectroscopic method[J].J.Appl.Phys.,2004,95(7):3250-3254. |
| [6] | 陆云涛,于涛.液晶器件扭曲角与光延迟的光学外差法测试技术理论研究[J].液晶与显示,2006,21(5):545-549. |
| [7] | Michinori Honma,Toshiaki Nose,Susumu Sato.Fast determination method of cell thickness and time-dependent twist angle in twisted-nematic liquid-crystal cells[J].Rev.Sic.Instrum.,2006,77:043901 (1-8). |
| [8] | GWAG Jin Seog,PARK Kyoung-Ho,LEE Gi-Dong,et al.Simple cell gap measurement method for twist-nematic liquid crystal cell[J].Jpn.J.Appl.Phys.,2004,43(1A/B):L30-L32. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%