Mr. Frantz Stabo-Eeg Profile

Frantz Stabo-Eeg

at Norwegian Univ of Science and Technology

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Publications (6)

Proceedings Article | 2 October 2008 Paper

Discriminating land mines from natural backgrounds by depolarization

Frantz Stabo-Eeg, Dietmar Letalick, Ove Steinvall, Mikael Lindgren

Proceedings Volume 7114, 71140H (2008) https://doi.org/10.1117/12.800209

KEYWORDS: Mining, Reflectivity, Land mines, Polarimetry, Polarization, Palladium, Light scattering, Reflection, Scattering, Remote sensing

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Results from an experimental polarimetric investigation of 7 different types of land mines and 3 types of plants with the aim to explore the possibility in discriminating surface land mines from natural backgrounds are presented. The samples Mueller matrices at both specular and non-specular angles during 405 nm 1570 nm laser illumination were collected. Also included in this study is reflection spectra from the mines taken from 400 to 2500 nm as well as actual images of surface land mines hidden in a natural environment during different weather conditions. The mines had a reflection coefficient between 5-15 % with peak values around 510 nm due to the embedded green pigment. The mines were found to be less reflective in wet compared to dry conditions. The polarimetric study revealed that the samples had similar retardance and diattenuation values for small incident angles, but that discrimination between the samples could be made by monitoring the depolarization of the incident light for several incident angles, as a function of the angular distribution of scattered light. The land mines generally experience less depolarization than the investigated plants, specifically for specular angles around 1570 nm where the mines act as a non-depolarizing sample with depolarization index close to 1.0. The depolarization index is significantly smaller for specular angles from the plants, becoming 0.4 or below. Both plants and mines experience more depolarization for non-specular angles. A non-specular angular scan with a constant bi-static angle resulted in a Lorentzian shaped depolarization index curve, with characteristic differences in the fitted line-shape parameters. Remote laser based polarimetry might thus be a promising supplementary technique in recognizing surface mines or other related man-made objects from a natural background. Conclusively, the depolarization index as a function of angular distribution of scattered light along with its wavelength dependence is a metric that produce significant differences in the polarimetric signatures.

SPIE Journal Paper | 1 July 2008

Well-conditioned multiple laser Mueller matrix ellipsometer

Frantz Stabo-Eeg, Morten Kildemo, Ingar Nerbo, Mikael Lindgren

OE, Vol. 47, Issue 07, 073604, (July 2008) https://doi.org/10.1117/12.10.1117/1.2957047

KEYWORDS: Spatial light modulators, Calibration, Matrices, Condition numbers, Polarization, Liquid crystals, Polarizers, Optical engineering, Mueller matrices, Sensors

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Proceedings Article | 9 May 2007 Paper

Characterisation of liquid crystals for broadband optimal design of Mueller matrix ellipsometers

J. Ladstein, M. Kildemo, G. Svendsen, I. Nerbø, F. Stabo-Eeg

Proceedings Volume 6587, 65870D (2007) https://doi.org/10.1117/12.722590

KEYWORDS: Wave plates, Switching, Liquid crystals, Crystals, Polysomnography, Condition numbers, Polarizers, Near infrared, Sensors, Polarization

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Proceedings Article | 20 February 2006 Paper

Quantitative measurements of flow velocity and direction using transversal Doppler optical coherence tomography

Arne Røyset, Trude Støren, Franz Stabo-Eeg, Tore Lindmo

Proceedings Volume 6079, 607925 (2006) https://doi.org/10.1117/12.647505

KEYWORDS: Doppler tomography, Sensors, Optical coherence tomography, Velocity measurements, Doppler effect, Particles, Scattering, Mirrors, Light scattering, Signal detection

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Proceedings Article | 18 August 2005 Paper

Biosensing and -imaging with enantiomeric luminescent conjugated polythiophenes using multiphoton excitation

Mikael Lindgren, Frantz Stabo-Eeg, Edrun Schnell, K. Peter Nilsson, Per Hammarstrom, Olle Inganaes

Proceedings Volume 5935, 59350E (2005) https://doi.org/10.1117/12.624438

KEYWORDS: Luminescence, Absorption, Quantum efficiency, Proteins, Polymers, Spectroscopy, Biosensing, Monochromators, Single photon, Sensors

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Proceedings Article | 30 November 2004 Paper

Determination of the phase- and polarization-changing properties of reflective spatial light modulators in one set-up

Frantz Stabo-Eeg, Kay Gastinger, Ola Hunderi, Mikael Lindgren

Proceedings Volume 5618, (2004) https://doi.org/10.1117/12.578438

KEYWORDS: Polarization, Spatial light modulators, Liquid crystals, Polysomnography, Reflectivity, Beam splitters, Optical components, Polarizers, Phase shifts, Phase measurement

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Showing 5 of 6 publications

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