College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
*Haowen Lianglianghw26@mail.sysu.edu.cn
Shin-Tson Wuswu@creol.ucf.edu
纸质出版日期:2023,
网络出版日期:2023-12-07,
收稿日期:2023-06-29,
修回日期:2023-10-05,
录用日期:2023-10-10
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Waveguide-based augmented reality displays: perspectives and challenges[J]. 光:快讯(英文), 2023,3(1).
Yuqiang Ding, Qian Yang, Yannanqi Li, et al. Waveguide-based augmented reality displays: perspectives and challenges[J]. eLight, 2023,3(1).
Waveguide-based augmented reality displays: perspectives and challenges[J]. 光:快讯(英文), 2023,3(1). DOI: 10.1186/s43593-023-00057-z.
Yuqiang Ding, Qian Yang, Yannanqi Li, et al. Waveguide-based augmented reality displays: perspectives and challenges[J]. eLight, 2023,3(1). DOI: 10.1186/s43593-023-00057-z.
Augmented reality (AR) displays
as the next generation platform for spatial computing and digital twins
enable users to view digital images superimposed on real-world environment
fostering a deeper level of human-digital interactions. However
as a critical element in an AR system
optical combiners face unprecedented challenges to match the exceptional performance requirements of human vision system while keeping the headset ultracompact and lightweight. After decades of extensive device and material research efforts
and heavy investment in manufacturing technologies
several promising waveguide combiners have been developed. In this review paper
we focus on the perspectives and challenges of optical waveguide combiners for AR displays. We will begin by introducing the basic device structures and operation principles of different AR architectures
and then delve into different waveguide combiners
including geometric and diffractive waveguide combiners. Some commonly used in-couplers and out-couplers
such as prisms
mirrors
surface relief gratings
volume holographic gratings
polarization volume gratings
and metasurface-based couplers
will be discussed
and their properties analyzed in detail. Additionally
we will explore recent advances in waveguide combiner design and modeling
such as exit pupil expansion
wide field of view
geometric architectures of waveguide couplers
full-color propagation
and brightness and color uniformity optimization. Finally
we will discuss the bottlenecks and future development trends in waveguide combiner technologies. The objective of this review is to provide a comprehensive overview of the current state of waveguide combiner technologies
analyze their pros and cons
and then present the future challenges of AR displays.
Augmented realityWaveguide displaySurface relief gratingsVolume holographic gratingPolarization volume gratingsMetasurface devices
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