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Applied Sciences
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Advanced Digital Holographic Technology: Imaging Methods and Devices Construction
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Advanced Digital Holographic Technology: Imaging Methods and Devices Construction

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 13851

Special Issue Editors

Prof. Dr. Tomasz Kozacki

E-Mail Website
Guest Editor
Warsaw University of Technology, Mechatronics Division, Institute of Micromechanics and Photonics, ul. Św. A. Boboli 8, 02-525 Warszawa, Poland
Interests: digital holographic microscopy; holographic tomography; holographic displays; holographic near-eye displays; holographic profilometry; holographic algorithms; phase space
Dr. David Blinder

E-Mail Website
Guest Editor
1. Vrije Universiteit Brussel (VUB), Dept. of Electronics and Informatics (ETRO), Pleinlaan 2, B-1050 Elsene, Belgium
2. IMEC, Kapeldreef 75, B-3001 Leuven, Belgium
Interests: digital holography; time–frequency analysis; computer graphics; data compression; image and video processing; inverse methods; artificial intelligence and high-performance computing
Prof. Dr. Ting-Chung Poon

E-Mail Website
Guest Editor
Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Interests: digital holography specializing on optical scanning holography; 3-D optical image processing and holographic display; computer-generated holography; holographic remote sensing; holographic microscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Holography has attracted much attention as an applied and futuristic 3D imaging technology. It has proven its great potential in research, and novel applications ranging from biology to industrial technology and entertainment. Key applications cover holographic and tomographic microscopy, profilometry, metrology, augmented reality, holographic displays, and holographic elements, among many others.

This Special Issue aims to present the latest cutting-edge research on holographic signal processing, and experimental and device construction aspects for holographic 3D imaging. 

We invite researchers to contribute their original research or review articles to this Special Issue presenting advanced Digital Holographic Technology.

Prof. Dr. Tomasz Kozacki
Dr. David Blinder
Prof. Dr. Ting-Chung Poon
Guest Editors

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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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

  • Digital holography
  • Digital holographic microscopy
  • Holographic tomography
  • Phase microscopy
  • Holographic profilometry
  • Holography in industrial inspection
  • Holographic displays
  • Holographic optical elements
  • Plasmonic holography
  • Computer holography
  • Holographic algorithms
  • Holographic aberration compensation

Published Papers (6 papers)

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Research

15 pages, 3895 KiB  
Article
Fast 3D Content Update for Wide-Angle Holographic Near-Eye Display
by Rafał Kukołowicz, Maksymilian Chlipala, Juan Martinez-Carranza, Moncy Sajeev Idicula and Tomasz Kozacki
Appl. Sci. 2022, 12(1), 293; https://doi.org/10.3390/app12010293 - 29 Dec 2021
Cited by 5 | Viewed by 1865
Abstract
Near-eye holographic displays are the holy grail of wear-on 3D display devices because they are intended to project realistic wide-angle virtual scenes with parameters matching human vision. One of the key features of a realistic perspective is the ability to move freely around [...] Read more.
Near-eye holographic displays are the holy grail of wear-on 3D display devices because they are intended to project realistic wide-angle virtual scenes with parameters matching human vision. One of the key features of a realistic perspective is the ability to move freely around the virtual scene. This can be achieved by addressing the display with wide-angle computer-generated holograms (CGHs) that enable continuous viewpoint change. However, to the best of our knowledge there is no technique able to generate these types of content. Thus, in this work we propose an accurate and non-paraxial hologram update method for wide-angle CGHs that supports continuous viewpoint change around the scene. This method is based on the assumption that with a small change in perspective, two consecutive holograms share overlapping data. This enables reusing the corresponding part of the information from the previous view, eliminating the need to generate an entirely new hologram. Holographic information for the next viewpoint is calculated in two steps: first, a tool approximating the Angular Spectrum Propagation is proposed to generate the hologram data from previous viewpoint; and second, the efficient Phase Added Stereogram algorithm is utilized for generating the missing hologram content. This methodology offers fast and accurate calculations at the same time. Numerical and optical experiments are carried out to support the results of the proposed method. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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11 pages, 3577 KiB  
Article
Recovery and Characterization of Orbital Angular Momentum Modes with Ghost Diffraction Holography
by Yanyan Huang, Vinu R.V., Ziyang Chen, Tushar Sarkar, Rakesh Kumar Singh and Jixiong Pu
Appl. Sci. 2021, 11(24), 12167; https://doi.org/10.3390/app112412167 - 20 Dec 2021
Cited by 2 | Viewed by 2597
Abstract
Orbital angular momentum (OAM) of optical vortex beams has been regarded as an independent physical dimension of light with predominant information-carrying potential. However, the presence of scattering environment and turbulent atmosphere scrambles the helical wavefront and destroys the orthogonality of modes in vortex [...] Read more.
Orbital angular momentum (OAM) of optical vortex beams has been regarded as an independent physical dimension of light with predominant information-carrying potential. However, the presence of scattering environment and turbulent atmosphere scrambles the helical wavefront and destroys the orthogonality of modes in vortex beam propagation. Here, we propose and experimentally demonstrate a new basis for the recovery of the OAM mode using a holographic ghost diffraction scheme. The technique utilizes the speckle field generated from a rotating diffuser for optical vortex mode encoding, and the fourth-order correlation of the speckle field for the efficient recovery of the associated modes. Furthermore, we successfully demonstrate the complex-field recovery of OAM modes by the adoption of a holography scheme in combination with the ghost diffraction system. We evaluate the feasibility of the approach by simulation and followed by experimental demonstration for the recovery of various sequentially encoded OAM modes. Finally, the efficacy of the recovered modes was quantitatively analyzed by an OAM mode analysis utilizing orthogonal projection scheme. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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9 pages, 21019 KiB  
Article
Fast Image Reconstruction Technique for Parallel Phase-Shifting Digital Holography
by Masahiro Tsuruta, Tomotaka Fukuyama, Tatsuki Tahara and Yasuhiro Takaki
Appl. Sci. 2021, 11(23), 11343; https://doi.org/10.3390/app112311343 - 30 Nov 2021
Cited by 13 | Viewed by 2301
Abstract
For incoherent and coherent digital holography, the parallel phase-shifting technique has been used to reduce the number of exposures required for the phase-shifting technique which eliminates zero-order diffraction and conjugates image components. Although the parallel phase-shifting technique can decrease the hologram recording time, [...] Read more.
For incoherent and coherent digital holography, the parallel phase-shifting technique has been used to reduce the number of exposures required for the phase-shifting technique which eliminates zero-order diffraction and conjugates image components. Although the parallel phase-shifting technique can decrease the hologram recording time, the image interpolations require additional calculation time. In this study, we propose a technique that reduces the calculation time for image interpolations; this technique is based on the convolution theorem. We experimentally verified the proposed technique and compared it with the conventional technique. The proposed technique is more effective for more precise interpolation algorithms because the calculation time does not depend on the size of interpolation kernels. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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11 pages, 2917 KiB  
Article
Fast Low-Precision Computer-Generated Holography on GPU
by David Blinder and Peter Schelkens
Appl. Sci. 2021, 11(13), 6235; https://doi.org/10.3390/app11136235 - 05 Jul 2021
Cited by 4 | Viewed by 2184
Abstract
Computer-generated holography (CGH) is a notoriously difficult computation problem, simulating numerical diffraction, where every scene point can affect every hologram pixel. To tackle this challenge, specialized software instructions and hardware solutions are developed to significantly reduce calculation time and power consumption. In this [...] Read more.
Computer-generated holography (CGH) is a notoriously difficult computation problem, simulating numerical diffraction, where every scene point can affect every hologram pixel. To tackle this challenge, specialized software instructions and hardware solutions are developed to significantly reduce calculation time and power consumption. In this work, we propose a novel algorithm for high-performance point-based CGH, leveraging fixed-point integer representations, the separability of the Fresnel transform and using new look-up table free cosine representation. We report up to a 3-fold speed up over an optimized floating-point GPU implementation, as well as a 15 dB increase in quality over a state-of-the-art FPGA-based fixed-point integer solution. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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15 pages, 12897 KiB  
Article
Dense U-Net for Limited Angle Tomography of Sound Pressure Fields
by Oliver Rothkamm, Johannes Gürtler, Jürgen Czarske and Robert Kuschmierz
Appl. Sci. 2021, 11(10), 4570; https://doi.org/10.3390/app11104570 - 17 May 2021
Cited by 2 | Viewed by 1657
Abstract
Tomographic reconstruction allows for the recovery of 3D information from 2D projection data. This commonly requires a full angular scan of the specimen. Angular restrictions that exist, especially in technical processes, result in reconstruction artifacts and unknown systematic measurement errors. We investigate the [...] Read more.
Tomographic reconstruction allows for the recovery of 3D information from 2D projection data. This commonly requires a full angular scan of the specimen. Angular restrictions that exist, especially in technical processes, result in reconstruction artifacts and unknown systematic measurement errors. We investigate the use of neural networks for extrapolating the missing projection data from holographic sound pressure measurements. A bias flow liner was studied for active sound dampening in aviation. We employed a dense U-Net trained on synthetic data and compared reconstructions of simulated and measured data with and without extrapolation. In both cases, the neural network based approach decreases the mean and maximum measurement deviations by a factor of two. These findings can enable quantitative measurements in other applications suffering from limited angular access as well. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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8 pages, 3493 KiB  
Article
Motion Parallax Holograms Generated from an Existing Hologram
by Tomoyoshi Shimobaba, Shuhei Katsuyama, Takashi Nishitsuji, Ikuo Hoshi, Harutaka Shiomi, Fan Wang, Takashi Kakue, Naoki Takada and Tomoyoshi Ito
Appl. Sci. 2021, 11(7), 2933; https://doi.org/10.3390/app11072933 - 25 Mar 2021
Cited by 4 | Viewed by 2049
Abstract
Generating new motion parallax holograms is required for holographic head-mounted displays when the head moves. Additionally, it is required for hologram generation from light field data that consist of a number of motion parallax images. However, re-rendering three-dimensional (3D) scenes and re-calculating holograms [...] Read more.
Generating new motion parallax holograms is required for holographic head-mounted displays when the head moves. Additionally, it is required for hologram generation from light field data that consist of a number of motion parallax images. However, re-rendering three-dimensional (3D) scenes and re-calculating holograms are computationally complex. Therefore, we propose a generation strategy of holograms with different motion parallax from an existing hologram without re-rendering 3D scenes and re-calculating holograms. The proposed method employs Fourier band-pass filtering and the simple relation of trigonometric functions, which makes it capable of skipping the computationally complex processes. Full article
(This article belongs to the Special Issue Advanced Digital Holographic Technology: Imaging Methods and Devices Construction)
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