Dr. Min Wan Profile

Dr. Min Wan

at Eindhoven University Of Technology

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 27 November 2023 Poster + Paper

Reading between the lines: interpolation as it impacts ringing suppression

Yue Wang, Qingmiao Xiao, Min Wan, John Healy

Proceedings Volume 12768, 127682F (2023) https://doi.org/10.1117/12.3009833

KEYWORDS: Interpolation, Gaussian filters, Reconstruction algorithms, Digital holography, Linear filtering, Holography

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SPIE Journal Paper | 28 April 2022

Fast subpixel displacement measurement, part 1: one-dimensional analysis, simulation, and experiment

Min Wan, John Healy, John T. Sheridan

OE, Vol. 61, Issue 04, 043105, (April 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.4.043105

KEYWORDS: Curium, Speckle, Digital imaging, Image processing, Optical engineering, Cameras, Terahertz radiation, Imaging systems, Motion estimation, Calibration

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Proceedings Article | 28 June 2021 Presentation + Paper

Correlation and subpixel resolution: fast 2-D subpixel displacement estimation

Min Wan, John Healy, John Sheridan

Proceedings Volume 11786, 1178619 (2021) https://doi.org/10.1117/12.2595318

KEYWORDS: Motion estimation, Calibration, Image resolution, Digital image correlation, Speckle, Signal to noise ratio, Motion models, Motion analysis, Error analysis, Statistical modeling

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Proceedings Article | 18 April 2021 Presentation + Paper

Visible and terahertz motion measurements

Min Wan, John Healy, John Sheridan

Proceedings Volume 11774, 117740W (2021) https://doi.org/10.1117/12.2589274

KEYWORDS: Terahertz radiation, Motion estimation, Image processing, Cameras, Wavelets, Velocimetry, Remote sensing, Particles, Optical resolution, Optical imaging

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Proceedings Article | 18 April 2021 Presentation + Paper

Fast digital image displacement measurement algorithm: theoretical analysis and simulation

Min Wan, John Healy, John Sheridan

Proceedings Volume 11774, 117740J (2021) https://doi.org/10.1117/12.2589228

KEYWORDS: Digital imaging, Motion measurement, Computer simulations, Algorithms, Motion estimation, Digital image correlation, Detection and tracking algorithms, Statistical analysis, Spatial resolution, Quantization

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Proceedings Article | 13 April 2020 Presentation + Paper

Optical analysis and characterization of self-written and coupled waveguides

Derek Cassidy, Ra'ed Mullalah, Min Wan, John Healy, John Sheridan

Proceedings Volume 11367, 113670X (2020) https://doi.org/10.1117/12.2555970

KEYWORDS: Waveguides, Refractive index, Photopolymers, Light wave propagation, Polymers, Beam propagation method, Geometrical optics, Integrated optics, Optical fibers, Connectors

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Proceedings Article | 1 April 2020 Open Access

Testing the coherence of light waves within self-written waveguides

Derek Cassidy, Min Wan, Ra'ed Malallah, John Healy, John Sheridan

Proceedings Volume 11367, 113671H (2020) https://doi.org/10.1117/12.2556013

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Proceedings Article | 2 March 2020 Paper

Sub-pixel motion estimation for terahertz imaging

Min Wan, Christopher Duignan, Derek Cassidy, John Healy, John Sheridan

Proceedings Volume 11279, 112792E (2020) https://doi.org/10.1117/12.2547340

KEYWORDS: Terahertz radiation, Motion estimation, Cameras, Imaging systems, Image fusion, Millimeter wave imaging, Sensors, Image resolution, Diffraction, Spatial resolution

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Proceedings Article | 2 March 2020 Paper

Characterization of silicon in the terahertz

Min Wan, Yevhen Yashchyshyn, Xiaohui Li, Konrad Godziszewski, Da-Wen Sun, John Sheridan

Proceedings Volume 11279, 112792D (2020) https://doi.org/10.1117/12.2547339

KEYWORDS: Terahertz radiation, Silicon, Boron, Semiconducting wafers, Dielectrics, Semiconductors, Absorption, Antennas, Spectroscopy, Resistance

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Proceedings Article | 2 March 2020 Presentation + Paper

Resolution enhancement of THz imaging based on Fourier-space spectrum detection

Hui Yuan, Alvydas Lisauskas, Min Wan, John Sheridan, Hartmut Roskos

Proceedings Volume 11279, 1127918 (2020) https://doi.org/10.1117/12.2546541

KEYWORDS: Imaging systems, Image resolution, Terahertz radiation, Spatial resolution, Sensors, Resolution enhancement technologies, Heterodyning, Microwave radiation, CMOS sensors, Oscillators

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Proceedings Article | 17 February 2020 Paper

Quantitative comparison of Gegenbauer, filtered Fourier, and Fourier reconstruction for MRI

Brid Roberts, Min Wan, Simon Kelly, John Healy

Proceedings Volume 11232, 112320L (2020) https://doi.org/10.1117/12.2547583

KEYWORDS: Magnetic resonance imaging, Reconstruction algorithms, Image filtering, Edge detection, Image segmentation, Detection and tracking algorithms, Fourier transforms, Linear filtering, Image restoration

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Proceedings Article | 14 May 2019 Presentation

Characterization of self-written waveguide within PVA/AA (Conference Presentation)

Derek Cassidy, Ra'ed Malallah, John Healy, Min Wan, John Sheridan

Proceedings Volume 11030, 1103008 (2019) https://doi.org/10.1117/12.2520968

KEYWORDS: Waveguides, Signal attenuation, Birefringence, Optical fibers, Light sources, Coherence (optics), Analytical research, Optical fabrication, Optical power meters, Light wave propagation

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The fabrication of Polyvinyl Alcohol/Acrylamide (PVA/AA) and the addition of a photo-sensitizer have been fully investigated. The creation of self-written waveguides (SWW) has also received much attention and their results have been very promising. In this paper we look at the optical loss across the SWW and also subject the SWW to coherence testing to analyze the wave form and measure any degradation in the optical signal. With the fabrication of the PVA/AA we use a photo-sensitizer or dye which is Erythrosine B (EB), which is sensitive to wavelength of λ = 532nm. We characterize a multi-mode (MM) fiber across various aspects such as attenuation profile and birefringence. We then cut the optical fiber and prepare it for cleaving. The fiber ends are then cleaved and then set into a V-Groove. The fiber ends are 7mm apart and in direct line or optical trajectory. This is then covered with a soluble form of photo-sensitized PVA/AA. When the PVA/AA is cured an optical light source (OLS) is connected to one end of the fiber. This OLS has a broadband light source capability from 400nm to 1700nm. An optical power meter (OPM) is connected to the other end of the fiber, this OLP also has the capability to receive and analyze wavelengths within the spectrum 400nm to 1700nm. The OPM is turned on the wavelength λ = 532nm propagates along the fiber until it enters the PVA/AA. The self-writing process begins and with the change in refractive index and the introduction of polymer chains a SWW is created. The SWW is now situated between the two fiber ends with an length matching the fiber distance of 7mmThe wavelength then enters the open optical fiber and the propagates along the fiber to the OPM. At this stage the analyses of the 532nm wavelength gets underway and the optical fiber link is re-characterized. At this stage a wavelength is characterized and measure against the original attenuation profile (AP) and birefringence measurements. The wavelength is also examined under spectral analyses using a spectrum analyzer and compared to the original wave form to measure interference and coherence. This will allow us to understand the characteristics of a SWW with fibers interconnecting and exposing the wavelength directly to the PVA/AA within its structure. The tests carried out investigate attenuation profile (AP), birefringence, polarization effects and interference. The SWW is characterized so that future use as a directional splitter/coupler created within a SWW can be used effectively within an integrated devise and within communication networks.

Proceedings Article | 30 April 2019 Presentation + Paper

Self-written net waveguides using photopolymer media

Ra'ed Malallah, Derek Cassidy, Inbarasan Muniraj, Min Wan, Harsha Vardhan Maraka, John Sheridan

Proceedings Volume 11026, 110260U (2019) https://doi.org/10.1117/12.2521183

KEYWORDS: Waveguides, Photopolymers, Polymers, Photopolymerization, Refractive index, Light wave propagation, Photopolymer media, Holography

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Proceedings Article | 23 April 2019 Presentation + Paper

Terahertz quantitative metrology using 300 GHz in-line digital holography

Min Wan, Hui Yuan, Dovilė Čibiraitė, Derek Cassidy, Alvydas Lisauskas, John Healy, Hartmut Roskos, Viktor Krozer, John Sheridan

Proceedings Volume 11030, 110300R (2019) https://doi.org/10.1117/12.2520787

KEYWORDS: Terahertz radiation, Holograms, Digital holography, Sensors, Holography, Metrology, 3D image processing, CMOS sensors, Imaging systems, Signal detection

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Proceedings Article | 23 April 2019 Paper

Convolution theorems for the linear canonical transforms

John Healy, Xiaolin Li, Min Wan, Liang Zhao

Proceedings Volume 11030, 110301A (2019) https://doi.org/10.1117/12.2520929

KEYWORDS: Convolution, Transform theory, Fourier transforms, Wigner distribution functions, Fractional fourier transform, Analytical research, Optical correlators, Optical filters, Hybrid optics, Time-frequency analysis

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Proceedings Article | 23 April 2019 Paper

A fast numerical algorithm for the 2D non-separable linear canonical transform based on a decomposition of the ABCD matrix

Liang Zhao, Min Wan, Qing Li, Sannuya Liu, John Sheridan, John Healy

Proceedings Volume 11030, 110301G (2019) https://doi.org/10.1117/12.2522839

KEYWORDS: Systems modeling, Digital Light Processing, Digital signal processing

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Proceedings Article | 23 April 2019 Presentation + Paper

300-GHz in-line holography with high dynamic range

Hui Yuan, Min Wan, Alvydas Lisauskas, John Sheridan, Hartmut Roskos

Proceedings Volume 11030, 110300S (2019) https://doi.org/10.1117/12.2520954

KEYWORDS: Terahertz radiation, Holograms, Holography, Sensors, Imaging systems, 3D image processing, CMOS sensors, Aluminum, Image resolution, Coherence imaging

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Proceedings Article | 16 April 2019 Paper

Coupling of self-written waveguides (SWW) in photopolymer and reverse manipulation

Derek Cassidy, Ra'ed Mulallah, Min Wan, John Healy, John Sheridan

Proceedings Volume 11029, 110290Y (2019) https://doi.org/10.1117/12.2520933

KEYWORDS: Refractive index, Waveguides, Geometrical optics, Photopolymers, Light wave propagation, Polymers, Beam propagation method, Connectors, Optical fibers, Visible radiation

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SPIE Journal Paper | 23 February 2019 Open Access

Expanding the field-of-view and profile measurement of covered objects in continuous-wave terahertz reflective digital holography

Dayong Wang, Yanlin Zhao, Lu Rong, Min Wan, Xiaoyu Shi, Yunxin Wang, John Sheridan

OE, Vol. 58, Issue 02, 023111, (February 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.2.023111

KEYWORDS: Digital holography, Terahertz radiation, 3D image reconstruction, Image fusion, Reflectivity, Holograms, Image registration, Continuous wave operation, Sensors, Wave propagation

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Proceedings Article | 24 May 2018 Paper

Photon-counted integral holography using orthographic projection images

Min Wan, Inbarasan Muniraj, Ni Chen, Derek Cassidy, John Healy, James Ryle, John Sheridan

Proceedings Volume 10677, 106773G (2018) https://doi.org/10.1117/12.2307581

KEYWORDS: Holograms, Holography, 3D image processing, Photon counting, Digital holography, Image acquisition, Imaging systems, Neptunium, Computer generated holography, Visualization

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Proceedings Article | 17 May 2018 Paper

Optical characterization of photopolymer material SWW at 532nm and for use at 850nm and 1300nm

Derek Cassidy, Ra'ed Malallah, Min Wan, John Healy, John Sheridan

Proceedings Volume 10683, 106832J (2018) https://doi.org/10.1117/12.2306163

KEYWORDS: Mirrors, Connectors, Waveguides, Optical fibers, Light wave propagation, Calibration, Optical power meters, Optical testing, Light sources, Wave propagation

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Proceedings Article | 8 March 2018 Paper

Self-bending of optical waveguides in a dry photosensitive medium

Ra'ed Malallah, Min Wan, Inbarasan Muniraj, Derek Cassidy, John Sheridan

Proceedings Volume 10528, 105281L (2018) https://doi.org/10.1117/12.2287215

KEYWORDS: Waveguides, Optical fibers, Photopolymers, Refractive index, Light wave propagation, Photosensitive materials, Optical fiber cables, Radio propagation, Nonlinear optics, Diffusion

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Proceedings Article | 24 October 2017 Paper

Positive absorption constraint based ptychographical algorithm with fast convergence rate

Changchao Zhai, Dayong Wang, Lu Rong, Zhihao Xu, Min Wan, Honghong Wang, Yunxin Wang

Proceedings Volume 10462, 104624D (2017) https://doi.org/10.1117/12.2285532

KEYWORDS: Absorption, Phase retrieval

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Proceedings Article | 15 May 2017 Presentation + Paper

Terahertz computed tomography in three-dimensional using a pyroelectric array detector

Bin Li, Dayong Wang, Xun Zhou, Lu Rong, Haochong Huang, Min Wan, Yunxin Wang

Proceedings Volume 10233, 102331F (2017) https://doi.org/10.1117/12.2265517

KEYWORDS: Reconstruction algorithms, Fourier transforms, 3D image reconstruction, 3D acquisition, Detector arrays, Computed tomography, Terahertz radiation, 3D image processing, Pyroelectric detectors

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Proceedings Article | 15 May 2017 Paper

Sparsity based terahertz reflective off-axis digital holography

Min Wan, Inbarasan Muniraj, Ra'ed Malallah, Liang Zhao, James Ryle, Lu Rong, John Healy, Dayong Wang, John Sheridan

Proceedings Volume 10233, 102330T (2017) https://doi.org/10.1117/12.2264788

KEYWORDS: Microwave radiation, Infrared imaging, Infrared radiation, Electromagnetism, Continuous wave operation, Digital holography, Holograms, Holography, Terahertz radiation, Reconstruction algorithms, Terahertz sources, Carbon dioxide lasers, Imaging systems, Reflectivity, Millimeter wave imaging

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