3-D spatial floating display using multi-wavelength integral photography

Zhencheng Fan,Yan Xia,Hongen Liao

doi:10.1038/s41598-018-33730-2

Abstract

Three-dimensional (3-D) autostereoscopic display with dedicated multiple spatial information under corresponding illumination is critical, especially for anti-counterfeiting, entertainment, etc. In this paper, we propose a 3-D spatial floating display using multi-wavelength integral photography (IP). Using dedicated inkjet printer and refraction-based IP algorithm, a complex two-dimensional (2-D) elemental image array (EIA) can be printed for both fluorescent and normal 3-D autostereoscopic display. With a micro-convex lens array (MLA) and a medium attached on the EIA, normal 3-D images are reconstructed under visible light, while fluorescent 3-D images can be reconstructed under ultraviolet (UV) light. Moreover, to provide comfortable 3-D images with multiple information in space, a feasible 3-D spatial floating display system is also proposed considering the spatial position of the observer with less UV radiation. The proposed method takes the wavelength of 3-D display into consideration to provide spatial multi-information, and can be applied for media, entertainment, etc. Experimental results verified the availability of the proposed method.

Highlights

Compared with conventional 2-D displays, 3-D displays attract lots of attention due to the displayed images with spatial information
System, consisting of a micro-convex lens array (MLA), a medium and a movable half-silvered mirror is proposed to avoid the injury caused by directly observing the UV light and provide comfortable 3-D floating images with multiple information in space considering the spatial position of the observer
The fabricated system consists of a switchable light including a UV light to inspire the fluorescence and a visible light, a MLA attached to a medium to construct the 3-D images, and a half-silvered mirror for intuitive spatial floating observation according to the observer’s position

Summary

Introduction

Compared with conventional 2-D displays, 3-D displays attract lots of attention due to the displayed images with spatial information. 3-D autostereoscopic displays, which can provide different spatial information under illumination with multi-wavelength are of importance in various filed, like media, entertainment, etc.[16,17,18]. Using dedicated inkjet printer and refraction-based IP algorithm, complex 2-D EIA with both visible and invisible information can be printed for 3-D autostereoscopic display under illumination with multi-wavelength. System, consisting of a MLA, a medium and a movable half-silvered mirror is proposed to avoid the injury caused by directly observing the UV light and provide comfortable 3-D floating images with multiple information in space considering the spatial position of the observer. The printed complex EIA is arranged under a medium and a MLA with the corresponding parameters, while a flexible half-silvered mirror can be adjusted according to the position of the individual for better observation

Results

Discussion

Conclusion