Searched for: mods_originInfo_publisher_s:"SPIE"
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Maria, M. (author), Anisimov, A. (author), Stols-Witlox, Maartje (author), Groves, R.M. (author)
In this study we investigate the possibility of spectra stitching in the context of Spectral Domain - Optical Coherence Tomography (SD-OCT). The aim is to reach a high axial resolution while keeping sampling issues to a low level (slow decay in depth) but still operating with the fastest camera line rate available. The paper focuses mainly on...
conference paper 2020
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López-Marín, Antonio (author), Springeling, Geert (author), Beurskens, Robert (author), Van Beusekom, Heleen (author), van der Steen, A.F.W. (author), Koch, Arjun D. (author), Bouma, Brett E. (author), Huber, Robert A. (author), Van Soest, Gijs (author), Wang, Tianshi (author)
In this study, we demonstrate a 12x36 mm motorized capsule for OCT imaging of the esophagus. The capsule produces unobstructed images by using a distal reflector design, thus avoiding shadow caused by the motor wires. The motor synchronous control enables three working modes: circumferential imaging, angular sector imaging and accurate beam...
conference paper 2020
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Ouyang, B. (author), Li, Yanlu (author), Kruidhof, Marten (author), Horsten, R.C. (author), Baets, Roel (author), van Dongen, K.W.A. (author), Caro, J. (author)
We report a highly sensitive ultrasound sensor based on an integrated photonics silicon Mach-Zehnder interferometer (MZI). One arm of the MZI is located on a thin membrane, acting as the sensing part of the device. Ultrasound waves excite the membrane's vibrational mode, thus inducing modulation of the MZI transmission. The measured sensor...
conference paper 2020
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Virgolin, M. (author), Wang, Ziyuan (author), Alderliesten, T. (author), Bosman, P.A.N. (author)
The advent of Machine Learning (ML) is proving extremely beneficial in many healthcare applications. In pediatric oncology, retrospective studies that investigate the relationship between treatment and late adverse effects still rely on simple heuristics. To capture the effects of radiation treatment, treatment plans are typically simulated...
conference paper 2020
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Chen, P. (author), Engel, Philip (author), Mazur, Adam (author), Abélard, Clément (author), Urbach, Paul (author)
Accurate optical modeling for design and optimization of liquid crystal on silicon spatial light modulators (LCoS SLMs) is important for phase-related applications. Traditional matrix method cannot accurately predict the optical performance when the LC distribution is complex, therefore the rigorous finite element method (FEM) is preferred....
conference paper 2020
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Doug Deen, Aaron (author), Pfeiffer, Tom (author), Van Beusekom, Heleen (author), Essers, J. (author), Huber, Robert (author), van der Steen, A.F.W. (author), Van Soest, Gijs (author), Wang, Tianshi (author)
The absorption of laser pulses by tissue leads not only to the generation of acoustic waves, but also to nanometer to sub-micrometer scale displacement. After the initial expansion, a quasi-steady state is achieved in a few microseconds. Previously we introduced the concept of thermo-elastic optical coherence tomography (TE-OCT) to "visualise...
conference paper 2020
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Agbana, T.E. (author), Nijman, Patrick (author), Hoeboer, M.D.B. (author), van Grootheest, D.N. (author), van Diepen, Angela (author), van Lieshout, Lisette (author), Diehl, J.C. (author), Verhaegen, M.H.G. (author), Vdovin, Gleb (author)
We present a simple method for the diagnosis of urinary schistosomiasis using an in-line lensless holographic microscope combined with flow cytometry technique. Using simple image processing algorithms and binary image classifier, our system provides automated detection of Schistosoma haematobium eggs in infected urine samples. Registered...
conference paper 2020
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Heemels, Alex (author), Agbana, T.E. (author), Pereira, S.F. (author), Diehl, J.C. (author), Verhaegen, M.H.G. (author), Vdovin, Gleb (author)
Fourier Ptychography is a computational imaging technique able to decouple high resolution from wide field of view, bypassing the diffraction limit of the microscope. Since it does not rely on high precision mechanics or fluorescent imaging, it is of practical interest for implementation in low scale devices. Despite its gains, realizing a...
conference paper 2020
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van Kessel, L.C.P.M. (author), Huisman, T. (author), Hagen, C.W. (author)
Line-edge roughness (LER) is often measured from top-down critical dimension scanning electron microscope (CD-SEM) images. The true three-dimensional roughness profile of the sidewall is typically ignored in such analyses. We study the response of a CD-SEM to sidewall roughness (SWR) by simulation. We generate random rough lines and spaces,...
conference paper 2020
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Šiaudinyte, L. (author), Pereira, S.F. (author)
As the semiconductor industry rapidly approaches the 3nm lithography node, on product overlay (OPO) requirements have become tighter and as a result, residuals magnitude requirements have become even more challenging. Metrology performance enhancements are required to meet these demands. Color Per Layer (CPL) is a unique imaging overlay...
conference paper 2020
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Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, Val (author)
Future quantum optical networks will require an integrated solution to multiplex suitable sources and detectors on a low-loss platform. Here we combined superconducting single-photon detectors with colloidal PbS/CdS quantum dots (QDs) and low-loss silicon nitride passive photonic components to show their combined operation at cryogenic...
conference paper 2020
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Lai, Marco (author), Skyrman, Simon (author), Shan, Caifeng (author), Paulussen, Elvira (author), Manni, Francesca (author), Swamy, A. (author), Babic, Drazenko (author), Edstrom, Erik (author), Persson, Oscar (author), Burstrom, Gustav (author), Elmi-Terander, Adrian (author), Hendriks, B.H.W. (author), De With, Peter H.N. (author)
In neurosurgery, technical solutions for visualizing the border between healthy brain and tumor tissue is of great value, since they enable the surgeon to achieve gross total resection while minimizing the risk of damage to eloquent areas. By using real-time non-ionizing imaging techniques, such as hyperspectral imaging (HSI), the spectral...
conference paper 2020
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Mohd Isa, W.H.B. (author), Hunt, A. (author), Hossein Nia Kani, S.H. (author)
Limitations of conventional actuators and sensors in small-scaled and complex devices have diverted the researches' attentions towards smart material transducers such as ionic polymer-metal composites (IPMCs). In addition to actuation capabilities, IPMCs generate voltage when subjected to mechanical deformation. Utilization of IPMCs as...
conference paper 2020
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Piscaer, P.J. (author), Soloviev, O.A. (author), Verhaegen, M.H.G. (author)
This paper discusses various practical problems arising in the design and simulation of predictive control methods for adaptive optics. Although there has been increased attention towards optimal prediction and control methods for AO systems, they are often tested in simplified simulation environments. The use of advanced AO simulators...
conference paper 2020
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Wang, X. (author), Benedictus, R. (author), Groves, R.M. (author)
This study forms the first part of research into enhancing the forward and back scattering of light in an optical fibre using nanoparticles (NPs). This approach has the potential to enhance the sensitivity of optical fibre sensing by increasing the signal-to-noise ratio. The work described in this paper is focused on understanding the...
conference paper 2020
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Maria, M. (author), Anisimov, A. (author), Stols-Witlox, Maartje (author), Groves, R.M. (author)
In this study, we compare the hyperspectral imaging capabilities of a custom-built visible light OCT with those of a commercial grade hyperspectral camera. Using the Short-Time-Fourier-Transform algorithm on the OCT signal, we estimate the variation in the surface spectral response from two paint pigments. Our study aims at comparing the...
conference paper 2020
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Kohno, Kotaro (author), Kawabe, Ryohei (author), Tamura, Yoichi (author), Endo, A. (author), Baselmans, J.J.A. (author), Karatsu, K. (author), Inoue, Akio K. (author), Moriwaki, Kana (author), Hayatsu, Natsuki H. (author)
We present a conceptual study of a large format imaging spectrograph for next-generation large (50-m class) single-dish telescopes, i.e., the Large Submillimeter Telescope (LST) and Atacama Large Aperture Submillimeter Telescope (AtLAST). Recent discoveries of high-redshift star-forming galaxies at z=8-9 and candidate quiescent galaxies at z~6...
conference paper 2020
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Buijtendorp, B.T. (author), Bueno, J. (author), Thoen, David (author), Sberna, V. Murugesan P.M. (author), Baselmans, J.J.A. (author), Vollebregt, S. (author), Endo, A. (author)
Superconducting resonators used in millimeter-submillimeter astronomy would greatly benefit from deposited dielectrics with a small dielectric loss. We deposited hydrogenated amorphous silicon films using plasma-enhanced chemical vapor deposition, at substrate temperatures of 100°C, 250°C and 350°C. The measured void volume fraction, hydrogen...
conference paper 2020
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Huijten, Esmee (author), Roelvink, Yannick (author), Brackenhoff, Stefanie A. (author), Bakx, Tom J.L.C. (author), Zaalberg, Stan (author), Baselmans, J.J.A. (author), Karatsu, K. (author), van Hoven, M.B. (author), Endo, A. (author)
The next technological breakthrough in millimeter-submillimeter astronomy is 3D imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal of foreground...
conference paper 2020
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Haji Heidari Varnosfaderani, Mehdi (author), Mozaffarzadeh, M. (author), Upputuri, Paul Kumar (author), Pramanik, Manojit (author)
Traditional optical devices rely on light propagation along a straight path. However, when the light propagates through a blurred medium, its direction get scattered by microscopic particles. This inhomogeneous distortion results in a diffused focus point. Light scattering is one of the main limitations for the optical imaging. This...
conference paper 2019
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