Color LCoS-based full-color electro-holographic 3D display system

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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The Zerotrope, a Dynamic Holographic Display: Design and Implementation

Applied Sciences ◽

10.3390/app9163378 ◽

2019 ◽

Vol 9 (16) ◽

pp. 3378

Author(s):

Philippe Gentet ◽

Jinbeom Joung ◽

Yves Gentet ◽

Kwang-Jib Kim ◽

Seung-Hyun Lee

Keyword(s):

Constant Speed ◽

3D Display ◽

Display Design ◽

Holographic Display ◽

Design And Implementation ◽

Full Color ◽

Zero Degree ◽

Stop Motion

This paper presents the Zerotrope, an improved version of the classic phenakistiscope and zoetrope devices. This device is used to create a new 360-degree dynamic 3D display by the inclusion of a single ultra-realistic full-color hologram. The Zerotrope is built with a zero-degree transplane hologram mounted on a disk rotating at a constant speed. When a stroboscopic lamp synchronized with the rotation illuminates this hologram, the recorded characters, arranged radially around the center of the disk, are animated as in a stop-motion movie. The operation of the Zerotrope is successful and shows the effect of a 3D display without the need for special viewing aids.

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Quantitative Evaluation of Work Efficiency and Eye Strain for Remote Control Construction Equipment Using 2D/3D Displays

The Open Construction and Building Technology Journal ◽

10.2174/1874836802014010133 ◽

2020 ◽

Vol 14 (1) ◽

pp. 133-138

Author(s):

Yoshihiro Sato ◽

Shohei Yamaguchi ◽

Shota Funaki ◽

Atsutoshi Kurihara ◽

Yuki Kumagai ◽

...

Keyword(s):

Remote Control ◽

Quantitative Evaluation ◽

High Accuracy ◽

Construction Equipment ◽

Work Efficiency ◽

Display System ◽

3D Display ◽

Physical Conditions ◽

Before And After ◽

Operator Workload

Remotely operated construction machines are used in cases where the operators are in danger, such as on steep slopes or contaminated sites. However, remote operation differs from what operators perceive during hands-on machine operation. Various studies have focused on improving work efficiency by employing remote control operation to reduce operator workload. In these studies, questionnaires were generally employed to evaluate the operator workload. However, the results obtained from the questionnaires varied depending on the physical conditions and the mood of the person on that day. It was therefore concluded that an accurate evaluation cannot be performed based on this method. Hence, in this study, the eye strain of machine operators was measured using an Auto Refractor/Keratometer. In particular, the ciliary muscle activities were measured before and after operating three display systems used for remote control of construction equipment. A quantitative evaluation was then conducted based on the eye strain data. The 2D display system exhibited low work accuracy and efficiency and resulted in significant eye strain. Although the 3D display system that required glasses exhibited high accuracy and efficiency, it resulted in significant eye strain. The 3D display system that did not require glasses demonstrated high accuracy and lower eye strain. From the results presented above, it was confirmed that the autostereoscopic 3D system is suitable for operators.

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