Ruan Ningye, Shi Feng, Tian Ye, Xing Peng, Zhang Wanli, Qiao Shuo
Opt Express. 2023 Oct 9;31(21):33799-33814. doi: 10.1364/OE.498011.
A two-dimensional geometrical waveguide enables ultra-thin augmented reality (AR) near-eye display (NED) with wide field of view (FOV) and large exit-pupil diameter (EPD). A conventional design method can efficiently design waveguides that meet the requirements, but is unable to fully utilize the potential display performance of the waveguide. A forward-ray-tracing waveguide design method with maximum FOV analysis is proposed, enabling two-dimensional geometrical waveguides to achieve their maximum FOV while maintaining minimum dimensions. Finally, the designed stray-light-suppressed waveguide NED has a thickness of 1.7 mm, a FOV of 50.00°H × 29.92°V, and an eye-box of 12 mm × 12 mm at an eye-relief of 18 mm.
二维几何波导能够实现具有宽视场（FOV）和大出瞳直径（EPD）的超薄增强现实（AR）近眼显示器（NED）。传统的设计方法可以有效地设计出满足要求的波导，但无法充分利用波导的潜在显示性能。提出了一种具有最大视场分析的前向光线追踪波导设计方法，使二维几何波导在保持最小尺寸的同时实现其最大视场。最后，设计的杂散光抑制波导NED厚度为1.7毫米，视场为50.00°H×29.92°V，在眼距为18毫米时眼盒为12毫米×12毫米。
