基于反射偏振膜的增强现实2D/3D兼容显示  

Augmented reality 2D/3D compatible display using reflective polarizer

作　　者：饶凤斌 冀清霖 李强[1] 邓欢[1] RAO Feng-bin;JI Qing-lin;LI Qiang;DENG Huan(College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电子信息学院,四川成都610065

出　　处：《液晶与显示》2023年第6期842-849,共8页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.62275179,No.U21B2034);四川省科技计划项目(No.2022YFG0326)。

摘　　要：为了将2D/3D兼容显示技术应用于增强现实设备中,本文提出了一种基于透镜阵列全息光学元件和反射偏振膜的增强现实2D/3D兼容显示系统。该系统利用反射偏振膜将投影光源进行反射或透射。反射光束载有2D显示片源,以此实现2D显示;透射光束载有3D显示片源,经透镜阵列全息光学元件调制后实现3D显示。反射偏振膜和透镜阵列全息光学元件对环境光均有较好的透过率,从而保证系统具有增强现实的光学透过性能。实验结果表明,所提增强现实2D/3D兼容显示系统能够在2D显示模式和3D显示模式之间进行自由切换,并且其环境光对比度高于显示标准要求的标准值3∶1。In order to apply two-dimensional(2D)/three-dimensional(3D)compatible display technology into augmented reality display devices,this paper proposed an augmented reality 2D/3D compatible display system based on lens array holographic optical element and reflective polarizer.By using reflective polarizer to reflect or transmit the projection light,the reflected light loaded with 2D image source is used to realize 2D display,and the transmitted light loaded with 3D image source is used to realize 3D display after being modulated by lens array holographic optical element.Both reflective polarizer and lens array holographic optical element have good ambient transmittance,which makes the display system own optical see-through property for augmented reality application.The experimental results indicate that the proposed augmented reality 2D/3D compatible display system can switch freely between 2D and 3D display modes,and the ambient contrast ratio of the system is higher than 3∶1,which is the standard value of display.

关 键 词：2D/3D兼容显示 增强现实显示 反射偏振膜 全息光学元件 环境光对比度 

分 类 号：TN27[电子电信—物理电子学]