Abstract

In this paper, we propose a holographic three-dimensional (3D) head-mounted display based on 4K-spatial light modulators (SLMs). This work is to overcome the limitation of stereoscopic 3D virtual reality and augmented reality head-mounted display. We build and compare two systems using 2K and 4K SLMs with pixel pitches 8.1 μm and 3.74 μm, respectively. One is a monocular system for each eye, and the other is a binocular system using two tiled SLMs for two eyes. The viewing angle of the holographic head-mounted 3D display is enlarged from 3.8 ∘ to 16.4 ∘ by SLM tiling, which demonstrates potential applications of true 3D displays in virtual reality and augmented reality.

Highlights

  • Virtual reality (VR) and augmented reality (AR) have been hot topics recently, and 3D technology is an important part of VR technology [1]

  • LCoS is a kind of display module in SLM, and it has a compact structure, which is suitable for 3D head-mounted displays (HMD); because its size is about on inch, its resolution is currently up to 4K, and its minimum pixel pitch reaches 3.74 μm

  • We believe that holographic 3D display for VR and AR can meet the requirements of near-eye display

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Summary

Introduction

Virtual reality (VR) and augmented reality (AR) have been hot topics recently, and 3D technology is an important part of VR technology [1]. Conventional optics present several disadvantages for near-to-eye 3D products for VR and AR [2]. Han-Ju Yeom et al did some work on astigmatism aberration compensation of the holographic HMD, and their system can present holographic 3D images in a see-through fashion clearly in a wide depth range [8]. Galeotti et al designed real-time tomographic holography for AR, which used a large-aperture holographic optical element (HOE) and obtained good results, using a large-aperture HOE to project an off-axis, viewpoint-independent virtual image 1 m away [11]. Peng Sun et al proposed a holographic near-eye display system based on a double-convergence light algorithm and provided a promising solution in future 3D AR realization [16].

Monocular System
Binocular System
Experiments and Results
Feasibility Analysis
Conclusions

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