电控聚合物分散液晶全息透镜的设计与制作

Design and fabrication of electrical-controlled PDLC focus holographic lens

在介绍了纳米聚合物分散液晶材料电控全息开关透镜基本原理的基础上,选取经实验优化的聚合物分散液晶配方EB8301:TEB300:RB:NPG:NVP=100:100:0.2:0.5:15并额外添加降低驱动电压的材料S-271,根据聚合物分散液晶材料的曝光特性及全息透镜原理,设计球面波与平面波干涉全息透镜记录光路,成功制作了电控全息开关透镜。该电控聚合物分散液晶全息开关透镜为平板式设计,对可见光基本无散射,驱动开关电压在60 V至80 V之间,在变焦成像系统,集成光学等方面有广泛应用前景。

The principle and the fabrication of electrical-controlled holographic focus lens is based on nano-scale Polymer Dispersed Liquid Crystal（PDLC） material. Through experiments, the optimum nano-scale PDLC recipe is developed with quality ratio as Polymer（ EB8301 ） ：Liquid crystal （TEB300） ： photoinitiator（ RB ） ： co-initiator（NPG） ： crosslink agent（NVP） = 100 ： 100：0.2：0.5 ： 15, besides within additional extra S-271 to reduce the driving voltage. Furthermore, the interference recording architecture between planar wave front and spherical wave front, which is specially designed according to the character of PDLC material and the principle of holographic lens, is adopt to fabricate the holographical polymer dispersed liquid crystal （H-PDLC） lens sample. The propriety research and experiments show that, the H-PDLC cell has a comparative higher diffractive efficiency within visible light, and it can be switched on and off with the threshold AC voltage within 60 -80 V. The H-PDLC switchable lens has a promising and extensive application in imaging system and modem optical systems.