Since the introduction of optical trap displays in 2018, there has been significant interest in further developing this technology. In an effort to channel interest in the most productive directions, this work seeks to illuminate those areas that, in the authors' opinion, are most critical to the ultimate success of optical trap displays as a platform for aerial 3D imaging. These areas include trapping, scanning, scaling, robustness, safety, and occlusion.

Improving photophoretic trap volumetric displays [Invited].

全息三维显示技术能有效地重建三维物体的波前，并为人眼提供完整的深度线索，已经成为三维显示领域的研究热点。相比于光学全息，计算全息通过计算机模拟全息图的记录过程，并采用可刷新的空间光调制器替代传统的光学记录材料作为全息图的承载媒介，因而成为理想的实现实时全息三维显示的技术方案。然而，复杂三维场景数据量巨大、空间光调制器调制能力不足以及全息三维显示系统展示度不高等问题仍阻碍了实时全息三维显示的发展。为了克服这些不足，研究者们在算法和硬件两方面做出了许多创新工作。本文综述了实时全息三维显示的进展。首先概述了全息术的基本原理和发展简史，接着详细介绍了全息图快速计算方法和针对现有空间光调制器的波前编码方法，然后讨论了深度学习对实时全息三维显示做出的贡献并介绍了一些典型的全息显示系统，最后对实时全息三维显示的未来发展进行了展望。 

实时全息三维显示技术研究进展

Optically addressed spatial light modulators (OASLMs) provide an appropriate solution for large-area and wide-viewing angle holographic displays because of the possibility of uploading holograms on it through tiling and with sub-micron diffraction feature sizes. A prototype with a large-size OASLM of 100 mm × 100 mm was fabricated using a solution-based deposition process for ZnO nanoparticles (NPs). ZnO NP-based OASLM is suitable for hologram tiling because of the extended charge carrier lifetime as a result of trap states in the ZnO NP layer annealed at a low temperature of 180°C, of which the activation energy was determined firstly by low-temperature measurements. Operating the ZnO NP OASLM in a DC driving mode was subsequently proposed, to utilize the extended charge carrier lifetime in the photosensor layer for temporary information storage. Finally, techniques to tile computer generated holograms (CGHs) spatially on a single OASLM were explored and evaluated, including the demonstration of simultaneous image replay from sequentially tiled two separate phase-only CGHs.

Large-size updatable optically addressed spatial light modulator (OASLM) based on ZnO nanoparticles for large-area holographic 3D displays

Principles of Display Holography

This publisher's note corrects a trademark concern in Appl. Opt.57, A122 (2018)APOPAI0003-693510.1364/AO.57.00A122.

Hardware and software improvements to a low-cost horizontal parallax holographic video monitor: publisher's note.

Displays capable of true holographic video have been prohibitively expensive and difficult to build. With this paper, we present a suite of modularized hardware components and software tools needed to build a HoloMonitor with basic "hacker-space" equipment, highlighting improvements that have enabled the total materials cost to fall to $820, well below that of other holographic displays. It is our hope that the current level of simplicity, development, design flexibility, and documentation will enable the lay engineer, programmer, and scientist to relatively easily replicate, modify, and build upon our designs, bringing true holographic video to the masses.

Hardware and software improvements to a low-cost horizontal parallax holographic video monitor.

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Hardware and software improvements to a low-cost horizontal parallax holographic video monitor.

Hardware and software improvements to a low-cost horizontal parallax holographic video monitor: publisher's note.