胆甾相液晶温控旋光色散特性的研究

胆甾相液晶的螺距易受温度和电压的影响,螺距变化时,胆甾相液晶的旋光色散特性发生相应的变化。实验证明:温度对胆甾相液晶旋光色散特性的影响与所对应的波长范围有关,在不同的波长范围内,温度对其旋光色散特性的影响规律不同;温度对胆甾相液晶旋光色散特性的影响还与所测试的波长离该温度下选择反射波带的远近有关,离选择反射波带越近,温度对其旋光色散特性的影响越大。实验表明:温度变化时,胆甾相液晶的旋光色散特性的变化是偏振透射谱移动的一个重要原因。

Study of cholesteric liquid crystal temperature-control ORD characteristic

Screw-pitch of cholesteric liquid crystal is affected easily by temperature and voltage.Cholesteric liquid crystal optical rotatory dispertion(ORD) characteristic is change when crew-pitch changes.Experiment maked chear: when cholesteric liquid crystal optical rotatory dispertion characteristic is influence by temperature,the influenced concerned with researchful wavelength area.Changed rules of cholesteric liquid crystal optical rotatory dispertion characteristic is differ when investigative wavelength area vary.The cholesteric liquid crystal optical rotatory dispertion characteristic is impacted by temperature.The influence relate to the distance from the tested wavelength to selective reflection band,the distance smaller,the impact lager.Experiments prove that changes of optical rotatory dispertion are one importance factor for changes of depolarization when temperature changes,one importance factor for shift of polarization transmission spectrum too.