外文文献关于VR/AR HOEs方案的光学讲解

Misszy

Abstract
With rapid advances in high-speed communication and computation, augmented reality (AR) and virtual reality (VR)
are emerging as next-generation display platforms for deeper human-digital interactions. Nonetheless, to
simultaneously match the exceptional performance of human vision and keep the near-eye display module compact
and lightweight imposes unprecedented challenges on optical engineering. Fortunately, recent progress in
holographic optical elements (HOEs) and lithography-enabled devices provide innovative ways to tackle these
obstacles in AR and VR that are otherwise difficult with traditional optics. In this review, we begin with introducing the
basic structures of AR and VR headsets, and then describing the operation principles of various HOEs and lithographyenabled
devices. Their properties are analyzed in detail, including strong selectivity on wavelength and incident angle,
and multiplexing ability of volume HOEs, polarization dependency and active switching of liquid crystal HOEs, device
fabrication, and properties of micro-LEDs (light-emitting diodes), and large design freedoms of metasurfaces.
Afterwards, we discuss how these devices help enhance the AR and VR performance, with detailed description and
analysis of some state-of-the-art architectures. Finally, we cast a perspective on potential developments and research
directions of these photonic devices for future AR and VR displays.


2021nature子刊关于HOE实现AR/VR效果