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Micromachines
Special Issues
3D Holographic Displays
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3D Holographic Displays

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E：Engineering and Technology".

Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 2138

Special Issue Editor

Dr. Xin Li

E-Mail Website
Guest Editor
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
Interests: computer generated holography; metasurfaces; 3D display; wavefront manipulation; near eye display

Special Issue Information

Dear Colleagues,

The 3D holographic display is considered the ultimate display technology, as it directly reconstructs the target wavefront and provides all depth cues for human beings. Novel techniques in photonics, optoelectronics, computer science, and other fields boost the rapid development of holographic display. In 3D holographic displays, the limitation of algorithms and core modulators is the main bottleneck, which attracts a large number of scholars to break it. Accordingly, this Special Issue seeks to showcase research papers, communications, and review articles that focus on: (1) spatial light modulators and other devices, which offers more effective light manipulation or novel ways; (2) 3D holographic display systems to improve the performance on display quality, viewing angle, field of view, etc.; (3) algorithms for hologram generation, including fast generation based on mathematical operation, neural network methods, algorithms for high-quality reconstruction, hologram generation for better rendering effect or occlusion; and (4) holographic near eye display and head up display, and other improvement on 3D holographic displays.

Dr. Xin Li
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • spatial light modulators and other devices
  • 3D display systems
  • algorithms for hologram generation
  • holographic near eye display
  • holographic head up display

Published Papers (2 papers)

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Research

12 pages, 3941 KiB  
Article
A Depth-Enhanced Holographic Super Multi-View Display Based on Depth Segmentation
by Zi Wang, Yumeng Su, Yujian Pang, Qibin Feng and Guoqiang Lv
Micromachines 2023, 14(9), 1720; https://doi.org/10.3390/mi14091720 - 31 Aug 2023
Viewed by 828
Abstract
A super multi-view (SMV) near-eye display (NED) effectively provides depth cues for three-dimensional (3D) display by projecting multiple viewpoint or parallax images onto the retina simultaneously. Previous SMV NED have suffered from a limited depth of field (DOF) due to a fixed image [...] Read more.
A super multi-view (SMV) near-eye display (NED) effectively provides depth cues for three-dimensional (3D) display by projecting multiple viewpoint or parallax images onto the retina simultaneously. Previous SMV NED have suffered from a limited depth of field (DOF) due to a fixed image plane. In this paper, a holographic SMV Maxwellian display based on depth segmentation is proposed to enhance the DOF. The proposed approach involves capturing a set of parallax images and their corresponding depth maps. According to the depth maps, the parallax images are segmented into N sub-parallax images at different depth ranges. These sub-parallax images are then projected onto N image-recording planes (IRPs) of the corresponding depth for hologram computation. The wavefront at each IRP is calculated by multiplying the sub-parallax images with the corresponding spherical wave phases. Then, they are propagated to the hologram plane and added together to form a DOF-enhanced hologram. The simulation and experimental results are obtained to validate the effectiveness of the proposed method in extending the DOF of the holographic SMV displays, while accurately preserving occlusion. Full article
(This article belongs to the Special Issue 3D Holographic Displays)
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10 pages, 5890 KiB  
Article
Diffractive Achromat with Freeform Slope for Broadband Imaging over a Long Focal Depth
by Donghui Yi, Fengbin Zhou, Jianyu Hua, Linsen Chen and Wen Qiao
Micromachines 2023, 14(7), 1401; https://doi.org/10.3390/mi14071401 - 09 Jul 2023
Viewed by 1051
Abstract
We propose a method for designing a long-focal-depth diffractive achromat (LFDA). By applying rotational symmetric parameterization, an LFDA with a diameter of 10.89 mm is designed over three wavelengths at six focal planes. The smoothly changed slope designed by the binary variable slope [...] Read more.
We propose a method for designing a long-focal-depth diffractive achromat (LFDA). By applying rotational symmetric parameterization, an LFDA with a diameter of 10.89 mm is designed over three wavelengths at six focal planes. The smoothly changed slope designed by the binary variable slope search (BVSS) algorithm greatly reduces the discontinuity in depth, thus it is a fabrication-friendly process for grayscale laser direct writing lithography, involving less fabrication error and cost. The deviation between the designed and fabricated profiles amounts to 9.68%. The LFDA operates at multiple wavelengths (654 nm, 545 nm, and 467 nm) with a DOF of 500 mm~7.65λ × 105 (λ = 654 nm). The simulated and measured full-width at half-maximum (FWHM) of the focused beam is close to the diffraction limit. Experimental studies suggest that the LFDA possesses a superior capability to form high-quality chromatic images in a wide range of depths of field. The LFDA opens a new avenue to achieve compact achromatic systems for imaging, sensing, and 3D display. Full article
(This article belongs to the Special Issue 3D Holographic Displays)
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