多层全息平板波导显示系统研究  

Multilayer Holographic Planar Waveguide Display System

作　　者：胡润 田方旭 林旗清 路陈陈 张军[1] Hu Run;Tian Fangxu;Lin Qiqing;Lu Chenchen;Zhang Jun(Guangzhou Key Laboratory of Visible Light Communication,College of Science and Engineering,Jinan University,Guangzhou 510632,Guangdong,China)

机构地区：[1]暨南大学理工学院广州市可见光通信重点实验室,广东广州510632

出　　处：《激光与光电子学进展》2022年第12期38-45,共8页Laser & Optoelectronics Progress

基　　金：广东省重点领域研发计划(2020B090921002);广州市产业领军人才聚焦工程项目(CXLJTD-201607);广东省基础与应用研究基金(2021A1515011933)。

摘　　要：为了实现增强现实头戴显示系统全色显示功能,建立了多层全息平板波导显示系统,并对该系统所采用的衍射原理、光栅常数及对应衍射波长等技术参数进行了研究。首先,根据光栅方程及全反射理论,介绍了全息平板波导入耦合光栅常数与传输光波长之间的限制关系。其次,为了实现光瞳扩展,介绍了转折光栅、出耦合光栅与入耦合光栅之间的限制关系。在此基础上,以550 nm绿光为例仿真设计了单层全息平板波导显示结构。然后,以单层全息平板波导为基础,建立了以685 nm、550 nm和437 nm作为三基色的三层全息平板波导显示系统。最后,使用digital light processing投影系统为光源检验了三层全息平板波导加工样品的出光效果。实验结果表明,三层全息平板波导可以实现光瞳扩展和全色显示。多层全息平板波导能够实现增强现实头戴显示系统全色显示。In this paper, a multilayer holographic flat waveguide display system has been proposed to realize the fullcolor display function of the augmented reality head-mounted display system. Furthermore, the diffraction principle,grating constant, and corresponding diffraction wavelength are investigated. First, the grating equation and total reflection theory were used to introduce the limiting relationship between the coupling grating constant and the transmitted light wavelength of the holographic planar waveguide. Second, to realize pupil expansion, the restrictive relationship between turning, out-coupling, and in-coupling gratings were applied. Third, the single-layer holographic flat waveguide display structure for 550-nm green light was simulated and designed. Next, based on the single-layer holographic planar waveguide, a three-layer holographic planar waveguide display system with 685 nm,550 nm, and 437 nm as the three primary colors was established. Finally, the light output effect of three-layer holographic planar waveguide processing samples was examined using digital light processing projection system as a light source. The experimental results show that the three-layer holographic planar waveguide realized pupil expansion and panchromatic display. Moreover, multilayer holographic planar waveguide realized a full-color display of an augmented reality head-mounted display system.

关 键 词：全息 全息光栅 多层平板波导 全色显示 出瞳扩展 增强现实显示头盔 

分 类 号：O436[机械工程—光学工程]