全息聚合物分散液晶膜的干涉图像存储及衍射特性

摘要

用激光干涉形成的亮条纹引发预聚物/液晶混合物相分离,在相分离稳定后，干涉图样被存储在聚合物/液晶复合膜中，被称之为全息聚合物分散液晶（HPDLC）。研究了相关因素对HPDLC膜信息存储的影响，并用光学显微镜观察了膜结构。给出了具有栅式结构膜的衍射特性。实验结果表明，形成的HPDLC膜其存储的栅结构稳定持久，而且其衍射效率可用电或热来调节。%The phase separation between prepolymer and liquid crystals wasinduced by laser beam interference bright patterns. After the phase separation, the interference patterns we re stored in polymer/liquid crystal composed film, which is called holographic polymer di spersed liquid crystals (HPDLC). Some related factors having influence o n the image storing in HPDLC were studied, the structure of the film was observed under optical microscope, and the diffraction properties of the gra tinglike film were given. Results show that the formed HPDLC with grating structure is permanent, and the diffraction efficiency can be adjusted electrically or thermally.