中文摘要：

介绍了贝纳德效应,胆甾相液晶织构等概念,实验制备出胆甾相液晶平面态样品,用偏光显微镜观察温度场致织构变化,观察到液晶盒在清亮点温度附近出现特殊花纹图案,类似于贝纳德效应或者是温度场致方格栅效应。实验现象说明了温度场使液晶分子产生对流,在偏光显微镜下观察双折射干涉,指向矢分布有周期性变化,形成了微观的贝纳德花纹。实验现象对于胆甾相液晶基础研究具有一定意义。

英文摘要：

The conception of Bernard effect and cholesteric liquid crystal texture are intro- duced. The sample of cholesteric liquid crystal in planar texture is prepared, the texture change with temperature field by polarizing microscope is observed. The Bernard effect or pane grate effect under the cleaning temperature is appeared. The experimental phenomena show that the temperature field induced the liquid crystal molecule convection, the birefrin- gence interference is occurred, and liquid crystal director distribution is periodical variation, so that the microcosmic Bernard effect pattern formed. The experimental phenomena wait for explanation rightly, and have some significance for liquid crystal physics basic research.