作　　者： ; ; ; ; ; (吴永俊）;

机构地区： 汕头大学理学院物理系

出　　处： 《光谱学与光谱分析》 2006年第3期539-541,共3页

摘　　要： 分析液晶光阀（LCLV）的电光色散特性，重点研究扭曲向列型液晶光阀TB3639的电光色散特性。在温度为27℃时，将TB3639液晶光阀置于频率为1000Hz的交流电场中，测出电光特性T-λ曲线，同时得到不同波长的T-V电光特性曲线，确定对比度与光波波长的函数关系k（λ），并得出电光色散特性关系曲线k（λ）～λ。分析结果表明，TB3639液晶光阀在可见光区域，具有相对较高的对比度，其色散较小。波长在450～750nm区域其对比度均大于0．8；其中波长在550～670nm区域其对比度变化不大，均大于0．95，其色散最小。 The electro-optical properties and dispersion characteristics of a liquid crystal light valve （LCLV） were investigated. A 90° twisted light valve （model TB3639） was used as a typical LCLV in the authors＇ experiment. At 27 ℃ and a fixed frequency of 1 000 Hz, the transmitted light intensities （T） of the LCLV were measured as a function of wavelength （λ） at different applied voltages. From the measured T-λ curves, the dependence of contrast ratio k on the wavelength can be derived. The authors＇ results showd that the TB3639 LCLV has a comparatively high contrast ratio and low dispersion within the visible region. In the range of 450-750 nm, the contrast ratio, with its value higher than 0. 8, does not change much with the wavelength. Particularly the contrast ratio is higher than 0. 95 with a minimum dispersion in the range of 550-670 nm.

关 键 词： 液晶光阀 光谱色散 电光特性

领　　域： [理学]