用于制备全息光波导的光致聚合物的研究进展  

Research Progress of Photopolymers for the Preparation of Holographic Optical Waveguide

作　　者：郭斌 王铭轩 张荻琴 孙敏远 毕勇[2] 赵榆霞[1] Guo Bin;Wang Mingxuan;Zhang Diqin;Sun Minyuan;Bi Yong;Zhao Yuxia(Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Research Center for Applied Laser,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China;School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所光化学转换与功能材料重点实验室,北京100190 [2]中国科学院理化技术研究所应用激光研究中心,北京100190 [3]中国科学院大学化学科学学院,北京100049 [4]中国科学院大学未来技术学院,北京100049

出　　处：《化学学报》2023年第4期393-405,共13页Acta Chimica Sinica

基　　金：国防科技创新特区项目(19-163-21-TS-001-073-01)资助。

摘　　要：全息光波导具有体积小、重量轻、成像清晰、设计灵活、可为使用者提供较大的眼动范围等诸多优势,是头戴式增强现实显示器(HMD-AR)中最实用的波导耦合技术.为提升HMD-AR系统的成像能力,扩大其视场范围,作为耦入和耦出元件的体全息光栅(VHG)须具有高的折射率调制度(Δn).光致聚合物是制造高性能透明VHG材料中最有潜力的一种记录介质.本综述介绍了HMD-AR中全息光波导的工作原理和光致聚合物VHG的制备原理,梳理了近期该领域中光致聚合物的研究进展,归纳总结了光致聚合物配方中的光引发体系、成膜树脂、记录单体和纳米粒子等添加剂以及记录介质的后处理方式对其全息光学性能的影响,以期为设计新组分、研发Δn更高的记录介质、制备性能更优的HMD-AR提供指导.Holographic optical waveguide is the most practical waveguide coupling technology for head-mounted augmented reality displays(HMD-AR)due to its advantages of small size,lightweight,clear imaging,flexible design,and a large eye-movement range for users.To enhance the imaging capability of the HMD-AR system and expand its field of view,the volume holographic gratings(VHG)used as the coupling-in and coupling-out elements must have a high refractive index modulation(Δn).Photopolymer is one of the most promising recording media for manufacturing high-performance transparent VHG.The working principle of holographic optical waveguide in HMD-AR and the preparation principle of photopolymer VHG are introduced,the recent research progress of photopolymers in this field is reviewed,the influence of different components in photopolymer formulations and the post-treatment methods of the recording media on their holographic optical properties are summarized,mainly including:(1)the composition of the photoinitiator systems;(2)the crosslink density,molecular weight and refractive index of the film-forming resins;(3)the refractive index,addition and size of the writing monomers;(4)the additive of nanoparticles,chain transfer agents,free radical scavengers and plasticisers;(5)post-treatment methods such as heating and/or light.It is expected to provide guidance for designing new components,developing recording media with higherΔn,and fabricating HMD-AR with better performance.

关 键 词：光致聚合物 头戴式增强现实显示器 光波导 体全息光栅 折射率调制度 

分 类 号：TQ317[化学工程—高聚物工业] TN873[电子电信—信息与通信工程]