Special Issue "Incoherent Digital Holography"

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

Deadline for manuscript submissions: closed (31 July 2020).

Special Issue Editors

Prof. Dr. Joseph Rosen
E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O.Box 653, Beer-Sheva 8410501, Israel
Interests: Digital Holography, Holographic Imaging, Diffractive Optics, Biomedical Optics, Optical Microscopy, Image Processing, Optical Interferometry, Statistical Optics, Optical Computing
Dr. Vijayakumar Anand
E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
Interests: Incoherent imaging; Diffractive Optics and Micro/Nanofabrication
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

The research on incoherent digital holography (IDH) has been renewed recently with novel possibilities due to the advancements in devices, techniques, and algorithms. These innovations enable the use of IDH for various applications in 3D imaging, inspection, security, microscopy, metrology, profilometry, augmented reality, and spectroscopy.

The Special Issue on “Incoherent Digital Holography” is focused on the recent progresses in the field and covers, but is not limited to, the following topics: self-interference holography, optical scanning holography, multiple-view projection methods, 3D imaging and display, coded aperture holography, microscopy, tomography, quantitative phase imaging, computer-generated holography, transport of intensity, temporal incoherent holography, partial coherent holography, deep learning in digital holography, polarization holography, and compressive holography. We welcome original papers which report on new research findings as well as succinct review papers on IDH.

Prof. Dr. Joseph Rosen
Dr. Vijayakumar Anand
Guest Editors

Manuscript Submission Information

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Keywords

  • Incoherent digital holography
  • self-interference holography
  • optical scanning holography
  • computer-generated holography
  • biomedical imaging
  • 3D imaging and display
  • compressive holography

Published Papers (3 papers)

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Research

Article
Fast Diffraction Calculation for Spherical Computer-Generated Hologram Using Phase Compensation Method in Visible Range
Appl. Sci. 2020, 10(17), 5784; https://0-doi-org.brum.beds.ac.uk/10.3390/app10175784 - 21 Aug 2020
Viewed by 594
Abstract
The synthesis of the spherical hologram has been widely investigated in recent years as it enables a large field of view both horizontally and vertically. However, there is an important issue of long time consumption in spherical computer-generated holograms (SCGHs). To address this [...] Read more.
The synthesis of the spherical hologram has been widely investigated in recent years as it enables a large field of view both horizontally and vertically. However, there is an important issue of long time consumption in spherical computer-generated holograms (SCGHs). To address this issue, a fast diffraction calculation method is proposed for SCGH based on phase compensation (PC). In our method, a wavefront recording plane (WRP) near the SCGH is used to record the diffraction distribution from the object plane, and the phase difference is compensated point-to-point from the WRP to generate the SCGH, during which a nonuniform sampling method is proposed to greatly decrease the sampling rate and significantly accelerate the generation speed of SCGH. In this paper, there are three main contributions: (1) SCGHs with the resolution of full high-definition can be synthesized in visible range with reducing the sampling rate. (2) Due to the current difficulty of realizing holographic display with curved surfaces, our PC method provides an alternative approach to implement optical experiments of SCGH, which takes it closer to the practical applications of spherical holography. (3) The problem of time-consuming calculation of the propagation model between plane and sphere is solved firstly to our best knowledge. Full article
(This article belongs to the Special Issue Incoherent Digital Holography)
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Article
Digital Holographic Interferometry without Phase Unwrapping by a Convolutional Neural Network for Concentration Measurements in Liquid Samples
Appl. Sci. 2020, 10(14), 4974; https://0-doi-org.brum.beds.ac.uk/10.3390/app10144974 - 20 Jul 2020
Viewed by 597
Abstract
Convolutional neural networks (CNNs) and digital holographic interferometry (DHI) can be combined to improve the calculation efficiency and to simplify the procedures of many DHI applications. In DHI, for the measurements of concentration differences between liquid samples, two or more holograms are compared [...] Read more.
Convolutional neural networks (CNNs) and digital holographic interferometry (DHI) can be combined to improve the calculation efficiency and to simplify the procedures of many DHI applications. In DHI, for the measurements of concentration differences between liquid samples, two or more holograms are compared to find the difference phases among them, and then to estimate the concentration values. However, liquid samples with high concentration difference values are difficult to calculate using common phase unwrapping methods as they have high spatial frequencies. In this research, a new method to skip the phase unwrapping process in DHI, based on CNNs, is proposed. For this, images acquired by Guerrero-Mendez et al. (Metrology and Measurement Systems 24, 19–26, 2017) were used to train the CNN, and a multiple linear regression algorithm was fitted to estimate the concentration values for liquid samples. In addition, new images were recorded to evaluate the performance of the proposed method. The proposed method reached an accuracy of 0.0731%, and a precision of ±0.0645. The data demonstrated a high repeatability of 0.9986, with an operational range from 0.25 gL−1 to 1.5 gL−1. The proposed method was performed with liquid samples in a cylindrical glass. Full article
(This article belongs to the Special Issue Incoherent Digital Holography)
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Article
Detecting the Extremely Small Angle of an Axicon by Phase-Shifting Digital Holography
Appl. Sci. 2019, 9(19), 3959; https://0-doi-org.brum.beds.ac.uk/10.3390/app9193959 - 20 Sep 2019
Cited by 1 | Viewed by 809
Abstract
Axicon is an optical element that can be used to produce high-quality Bessel beams efficiently. In general, the smaller the base angle of the axicon is, the longer the diffraction-free distance of the generated Bessel beam will be. Therefore, axicon with an extremely [...] Read more.
Axicon is an optical element that can be used to produce high-quality Bessel beams efficiently. In general, the smaller the base angle of the axicon is, the longer the diffraction-free distance of the generated Bessel beam will be. Therefore, axicon with an extremely small base angle is important for the generation of Bessel beam. However, the measurement of an extremely small base angle is a challenge. Here, we applied the phase-shifting digital holography in the measurement of axicon angle. The errors of the three measured axicons with base angles of 0.5°, 1°, and 1° were 1.94%, 4.43%, and 1.63%, respectively. Full article
(This article belongs to the Special Issue Incoherent Digital Holography)
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