Blar i Fakultet for informasjonsteknologi og elektroteknikk (IE) på tidsskrift "Optics Express"
Viser treff 1-20 av 35
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A sensor-data-based denoising framework for hyperspectral images
(Journal article; Peer reviewed, 2015)Many denoising approaches extend image processing to a hyperspectral cube structure, but do not take into account a sensor model nor the format of the recording. We propose a denoising framework for hyperspectral images ... -
Acoustooptic characterization of a birefringent two-mode photonic crystal fiber
(Journal article; Peer reviewed, 2006)The effect of axial variations in acoustooptic phase-mismatch coefficient of a two-mode birefringent photonic crystal fiber (PCF) is studied experimentally using two different methods. The first method is to determine axial ... -
Angular dependence of fluorescence from turbid media
(Journal article; Peer reviewed, 2015)We perform Monte Carlo light scattering simulations to study the angular distribution of the fluorescence emission from turbid media and compare the results to measured angular distributions from fluorescing white paper ... -
Characterisation of the n-colour printing process using the spot colour overprint model
(Journal article; Peer reviewed, 2014)This paper is aimed at reproducing the solid spot colours using the n-colour separation. A simplified numerical method, called as the spot colour overprint (SCOP) model, was used for characterising the n-colour printing ... -
Controlling an actively-quenched single photon detector with bright light
(Journal article; Peer reviewed, 2011)We control using bright light an actively-quenched avalanche single-photon detector. Actively-quenched detectors are commonly used for quantum key distribution (QKD) in the visible and near-infrared range. This study shows ... -
Deep learning models for optically characterizing 3D printers
(Peer reviewed; Journal article, 2021)Multi-material 3D printers are able to create material arrangements possessing various optical properties. To reproduce these properties, an optical printer model that accurately predicts optical properties from the printer’s ... -
Detection of single nano-defects in photonic crystals between crossed polarizers
(Peer reviewed; Journal article, 2013)We investigate, by simulations and experiments, the light scattering of small particles trapped in photonic crystal membranes supporting guided resonance modes. Our results show that, due to amplified Rayleigh small particle ... -
Do it yourself hyperspectral imager for handheld to airborne operations
(Journal article; Peer reviewed, 2018)This study describes rapid prototype construction of small and lightweight push broom Hyper Spectral Imagers (HSI). The dispersive element housings are printed by a thermoplastic 3D printer combined with S-mount optical ... -
Effects of bursty traffic in service differentiated Optical Packet Switched networks
(Journal article; Peer reviewed, 2004)Service differentiation is a crucial issue in the next-generation Optical Packet Switched networks. In this paper we examine how bursty traffic influences the performance of a service differentiated Optical Packet Switched ... -
Estimation of Fluorescent Donaldson Matrices Using a Spectral Imaging System
(Journal article; Peer reviewed, 2018)The present paper proposes a method to estimate the bispectral Donaldson matrices of fluorescent objects in a scene with a spectral imaging system. Multiple ordinary light sources with continuous spectral-power distributions ... -
Finite-size limitations on quality factor of guided resonance modes in 2D photonic crystals
(Journal article; Peer reviewed, 2013)High-Q guided resonance modes in two-dimensional photonic crystals, enable high field intensity in small volumes that can be exploited to realize high performance sensors. We show through simulations and experiments how ... -
Heterodyne interferometer for absolute amplitude vibration measurements with femtometer sensitivity
(Journal article; Peer reviewed, 2013)A heterodyne interferometer for highly sensitive vibration measurements in the range 100kHz − 1.3GHz is presented. The interferometer measures absolute amplitude and phase. The signal processing of the setup is analyzed ... -
High-performance stationary solar tracking through multi-objective optimization of beam-steering lens arrays
(Peer reviewed; Journal article, 2020)Beam-steering lens arrays enable solar tracking using millimeter-scale relative translation between a set of lens arrays. This may represent a promising alternative to the mechanical bulk of conventional solar trackers, ... -
Hyperbolic geometry for colour metrics
(Journal article; Peer reviewed, 2014)It is well established from both colour difference and colour order perpectives that the colour space cannot be Euclidean. In spite of this, most colour spaces still in use today are Euclidean, and the best Euclidean colour ... -
Hyperbolic geometry for colour metrics
(Journal article; Peer reviewed, 2014)It is well established from both colour difference and colour order perpectives that the colour space cannot be Euclidean. In spite of this, most colour spaces still in use today are Euclidean, and the best Euclidean colour ... -
Inducing robustness and plausibility in deep learning optical 3D printer models
(Peer reviewed; Journal article, 2022)Optical 3D printer models characterize multimaterial 3D printers by predicting optical or visual quantities from material arrangements or tonal values. Their accuracy and robustness to noisy training data are crucial for ... -
LED primary selection algorithms for simulation of CIE standard illuminants
(Peer reviewed; Journal article, 2020)Although mixture of LEDs is being considered as a simulator of the CIE daylight series, the performance of the simulations is highly dependent on the SPD of the selected LEDs. An algorithm for selection of the best LEDs ... -
Multi-printer learning framework for efficient optical printer characterization
(Peer reviewed; Journal article, 2023)A high prediction accuracy of optical printer models is a prerequisite for accurately reproducing visual attributes (color, gloss, translucency) in multimaterial 3D printing. Recently, deep-learning-based models have been ... -
Multilevel Maxwell-Bloch simulations in inhomogeneously broadened media
(Journal article; Peer reviewed, 2011)A compact numerical method for simulating ultrafast pulse interaction with inhomogeneously broadened multi-level media is reported. We use a low-dispersion pseudospectral scheme with fourth order time stepping for Maxwell’s ... -
Multiplexed Mach-Zehnder interferometer assisted ring resonator sensor
(Peer reviewed; Journal article, 2022)A Mach-Zehnder interferometer assisted ring resonator configuration (MARC)-based multiplexed photonic sensor with a large measurement range is experimentally demonstrated. The presented MARC sensor consists of a balanced ...