报道了一种聚合物分散液晶(PDLC)膜在压力作用下从散射膜变为透明膜的实验现象,建议称之为PDLC膜的压光效应。介绍了与压光效应相关的PDLC的应变液晶、剪切液晶和拉伸液晶等概念;给出PDLC压光效应膜样品照片,偏光显微镜照片,电光特性光谱分析和压光效应光谱分析。提出PDLC膜压光效应的原理猜想,给出对PDLC膜光学性质的重新认识,认为只要每个液晶微滴中液晶分子取向一致了,无论不同微滴间液晶分子取向一致与否,PDLC膜都将透明。PDLC膜压光效应将对液晶基础科学提出新课题,将在许多不用加电的新型压光器件(按压窗、功能玻璃和光纤压力传感器等)领域有应用前景。 Reported an experimental phenomenon that a polymer dispersed liquid crystal (PDLC) film changes from a scattering film to a transparent film under pressure, which is suggested as a calendaring effect of a PDLC film. The concepts of strain liquid crystal, shear liquid crystal and stretched liquid crystal of PDLC related to calendaring effect were introduced. The samples of PDLC calendered film, photos of polarized light microscope, spectroscopic analysis of electro-optical properties and calendering effect were given. The conjecture on the principle of PDLC films was put forward and the optical properties of PDLC films were re-recognized. It is considered that as long as the alignment of the liquid crystal molecules in each liquid crystal droplet is the same, no matter whether the alignment of liquid crystal molecules between different droplets is consistent or not, Will be transparent. The PDLC film calendering effect will pose a new subject in the basic science of liquid crystal and will be applied in many fields of new calendering devices (such as press window, functional glass and optical fiber pressure sensor) without powering.