聚合物分散液晶光栅的制备实验

Experiment on Preparation of PDLC Grating

把夹预聚物分散液晶的玻璃用菲林掩膜遮盖,在紫外灯下进行弱准直光曝光,使液晶和聚合物产生相分离,形成聚合物分散液晶光栅。并采用偏光显微镜对光栅的形貌进行检测,利用激光笔对光栅的电光特性进行测定,证明衍射效率具有电场可调谐性。实验方法简单易操作,现象明显,在光栅常数较大时可以明显看到衍射效果,对液晶物理专业基础实验的教学具有参考意义。

With film mask to cover the prepoIymer dispersion liquid crystal glass, under the UV light to light exposure, make liquid crystal and polymer phase separation, forming a polymer dispersed liquid crystal grating. The morphology of the grating was detected by scanning electron microscope, and the electro-optic properties of the grating were measured by using the laser pointer, which proved that diffraction efficiency is electric field tunable.The experimental method is simple and easy to operate, the phenomenon is obvious, in the large grating constant can clearly see the diffraction effect, has a guiding significance on the basis of the experiment of liquid crystal physics teaching.