Aerial Projection 3D Display Based on Integral Imaging

Wu-Xiang Zhao,Han-Le Zhang,Qing-Lin Ji,Huan Deng,Da-Hai Li

doi:10.3390/photonics8090381

Wu-Xiang Zhao, Han-Le Zhang + Show 3 more

Open Access

https://doi.org/10.3390/photonics8090381

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Journal: Photonics	Publication Date: Sep 9, 2021
Citations: 4	License type: CC BY 4.0

Affiliation: Sichuan University, Beihang University

Abstract

We proposed an aerial projection 3D display based on integral imaging. It is composed of a projector, a lens-array holographic optical element (HOE), and two parabolic mirrors. The lens-array HOE is a diffraction grating and is made by the volume holography technique. The lens-array HOE can be produced on a thin glass plate, and it has the optical properties of a lens array when the Bragg condition is satisfied. When the display beams of the element image array (EIA) are projected on the lens-array HOE, 3D images can be reconstructed. The two parabolic mirrors can project 3D images into the air. The Bragg-unmatched light simply passes through the lens-array HOE. Therefore, the aerial projection 3D images appear to be imaged in the air without any medium. In the experiment, a BenQ projector was used for the projection of 3D images, with a resolution of 1600 × 1200. The diameter and the height of each parabolic mirror are 150 mm and 25 mm, respectively. The inner diameter of the parabolic mirror is 40 mm. The 3D images were projected in the air, and the experimental results prove the correctness of our display system.

Highlights

Aerial projection or floating 3D display has been widely investigated
Volumetric displays can float 3D images in the air, and they consist of bubbles [12,13], photoactivatable dye [14], nonlinear optical crystals [15], quantum dots [16], fog [17,18], and water drops [19]
We propose a simple-structured aerial projection 3D display based on integral imaging, which is composed of a projector, a lens-array holographic optical element (HOE), and two parabolic

Summary

Introduction

Aerial projection or floating 3D display has been widely investigated. There are many types of floating 3D displays. Aerial Projection 3D Display Based on Integral Imaging. The light-field display can present floating glass-free 3D images in the air, but more projectors are needed [1,2,3], or scanning [4,5,6], rotating [7,8,9,10,11], and processing are required.

Results

Conclusion