Orthoscopic integral imaging 3D display by use of negative lens array

We propose a dual-view integral imaging 3D display based on a multiplexed lens-array holographic optical element (MHOE). A MHOE is a volume holographic optical element obtained by multiplexing technology, which can be used for dual-view integral imaging 3D display due to the angle selectivity of the volume HOE. In the fabrication of the MHOE, two spherical wavefront arrays with different incident angles are recorded using photopolymer material. In the reconstruction, two projectors are used to project the elemental image arrays (EIA) with corresponding angles for two viewing zones. We have developed a prototype of the dual-view integral imaging display. The experimental results demonstrate the correctness of the theory.

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Aerial Projection 3D Display Based on Integral Imaging

Photonics ◽

10.3390/photonics8090381 ◽

2021 ◽

Vol 8 (9) ◽

pp. 381

Author(s):

Wu-Xiang Zhao ◽

Han-Le Zhang ◽

Qing-Lin Ji ◽

Huan Deng ◽

Da-Hai Li

Keyword(s):

Glass Plate ◽

Optical Element ◽

Parabolic Mirror ◽

3D Display ◽

Thin Glass ◽

3D Images ◽

Integral Imaging ◽

Lens Array ◽

Holographic Optical Element ◽

Volume Holography

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.

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Full-chain modeling and performance analysis of integral imaging three-dimensional display system

Journal of the European Optical Society Rapid Publications ◽

10.1186/s41476-020-00134-7 ◽

2020 ◽

Vol 16 (1) ◽

Cited By ~ 1

Author(s):

Ying Yuan ◽

Xiaorui Wang ◽

Yang Yang ◽

Hang Yuan ◽

Chao Zhang ◽

...

Keyword(s):

Optimization Design ◽

Quality Evaluation ◽

Light Field ◽

Three Dimensional ◽

Display System ◽

3D Display ◽

Performance Characterization ◽

Integral Imaging ◽

Characterization Model ◽

Display Quality

Abstract The full-chain system performance characterization is very important for the optimization design of an integral imaging three-dimensional (3D) display system. In this paper, the acquisition and display processes of 3D scene will be treated as a complete light field information transmission process. The full-chain performance characterization model of an integral imaging 3D display system is established, which uses the 3D voxel, the image depth, and the field of view of the reconstructed images as the 3D display quality evaluation indicators. Unlike most of the previous research results using the ideal integral imaging model, the proposed full-chain performance characterization model considering the diffraction effect and optical aberration of the microlens array, the sampling effect of the detector, 3D image data scaling, and the human visual system, can accurately describe the actual 3D light field transmission and convergence characteristics. The relationships between key parameters of an integral imaging 3D display system and the 3D display quality evaluation indicators are analyzed and discussed by the simulation experiment. The results will be helpful for the optimization design of a high-quality integral imaging 3D display system.

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