基于柱面全息波导的增强现实近眼显示系统  

Augmented Reality Near-Eye Display System Based on Cylindrical Holographic Waveguide

作　　者：梅宇 彭飞 孙明 郑华东 于瀛洁[1] 夏新星 Mei Yu;Peng Fei;Sun Ming;Zheng Huadong;Yu Yingjie;Xia Xinxing(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;Science and Technology on ElectroOptic Control Laboratory,Luoyang 471000,Henan,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444 [2]光电控制技术重点实验室,河南洛阳471000

出　　处：《激光与光电子学进展》2022年第20期128-134,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62005154);国家重点研发计划(2021YFF0307803);上海市自然科学基金(20ZR1420500);重点实验室基金(6142504200312)。

摘　　要：基于全息波导的增强现实近眼显示技术可以直接为用户双眼提供虚实融合的图像信息,形态相对便携,近年来发展较为迅速。但目前报道的全息波导近眼显示多采用平板波导结构,一般需额外添加曲面护目镜,系统体积相对较大。因此提出基于柱面全息波导的增强现实近眼显示方法,实现了近眼显示从传统平板全息波导形态到曲面类型全息波导的拓展。提出柱面全息波导的全息曝光制备方法并制备柱面全息波导,搭建柱面全息波导近眼显示平台实验系统,实现了出瞳大小约10 mm,单目视场角约24°的增强现实显示效果,将为曲面波导与曲面护目镜的结合提供技术基础。Augmented reality near-eye display technologies based on holographic waveguide can directly provide user’s eyes with virtual and real image fusion information and a relatively compact form factor;these have been developed rapidly in recent years.However,the reported displays of the near-eye holographic waveguide mostly adopt a flat waveguide structure,which require additional curved goggles,and thus the system volume is relatively large.Therefore,based on a cylindrical holographic waveguide,this paper proposes an augmented reality near-eye display method to extend the neareye display based on the traditional flat holographic waveguide to a curved shape.Furthermore,a holographic exposure preparation method for this cylindrical waveguide is proposed,followed by the fabrication of the cylindrical waveguide.Finally,a bench-top experimental system for the near-eye display is set up using the cylindrical holographic waveguide.Investigations revealed that the novel waveguide achieved an augmented reality display effect,with an exit pupil size of approximately 10 mm and a monocular field of view of approximately 24°.Therefore,we propose that this improved holographic waveguide will provide a technical basis for combining curved waveguides with curved goggles.

关 键 词：柱面波导 全息波导 全息光学元件 近眼显示 头盔显示器 

分 类 号：O439[机械工程—光学工程]