三色激发聚合物分散液晶体光栅的制备及应用  

Fabrication and Application of a Tri-Color Excited Holographic Polymer Dispersed Liquid Crystal Volume Gratings

作　　者：高辉[1] 郑继红[1] 王康妮[1] 陆飞跃[1] 王青青[1] 高正[1] 张晨 庄松林[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院教育部光学仪器与系统工程研究中心上海市现代光学系统重点实验室,上海200093 [2]上海罗曼照明科技股份有限公司,上海200082

出　　处：《中国激光》2016年第3期149-155,共7页Chinese Journal of Lasers

基　　金：上海市教育委员会科研创新项目(14ZZ138);上海市重点学科项目第三期(S30502);上海罗曼照明科技股份有限公司联合研发项目

摘　　要：报道了一种针对红绿蓝三原色激光同时敏感的电控全息聚合物分散液晶光栅(H-PDLC)的制备及其特性研究。通过在预聚物液晶体系中同时加入两组不同的光引发剂和协引发剂,孟加拉红与N-苯基甘氨酸、亚甲基蓝与对甲基苯磺酸水合物,以及纳米银颗粒,实现单片样品三波段激光(632.8、532、441.6 nm)激发写入的体全息光栅。实验测量和研究了该液晶光栅的衍射效率和电光特性。此外,通过显示图像的三原色衍射实现裸眼立体显示中左眼和右眼的图像分束功能。实验结果表明,三色聚合物分散液晶体光栅在红绿蓝三个波段均具有较高的衍射效率和良好的电控开关特性,在裸眼立体显示及相关领域有良好的应用前景。Fabrication and characteristic research of electrically controlled holographic polymer dispersed liquid crystal （H-PDLC） gratings which are simultaneously sensitive to red, green and blue laser beams are reported. Two different systems with photoinitiator and coinitiator, rose Bengal and N-phenylglycine, methylene blue and ptoluenesulfonic acid, as well as silver nanoparticles are employed in pre-polymer and liquid crystal mixture to record volume gratings formed under three laser beams （632.8, 532, 441.6 nm）. The diffraction efficiency and electro-optical characteristics of the gratings are experimentally measured and studied. In addition, diffraction of the three primary colors is used to display image to demonstrate the image splitter function of left and right eyes for autostereoscopic display. The experimental results show that the tri-color excited gratings have high diffraction efficiency and good electro-optical characteristics under red, green and blue laser beams, and they have potential application prospect in autostereoscopic display and some other related fields.

关 键 词：材料 聚合物分散液晶 体光栅 电控全息器件 裸眼立体显示 

分 类 号：O438[机械工程—光学工程]