Institute National dOptique INO

Canada

Institute National dOptique INO

Canada
SEARCH FILTERS
Time filter
Source Type

Yavrian A.,Opsun Technologies Inc. | Tremblay S.,Opsun Technologies Inc. | Levesque M.,Institute National dOptique INO | Gilbert R.,Opsun Technologies Inc.
AIP Conference Proceedings | Year: 2013

Development of a new type of secondary optical element (SOE) which allows increasing significantly the acceptance angle of a High Concentrating Photovoltaic (HCPV) system. Using this SOE, three HCPVs of various geometrical concentration ratios, namely 380X, 900X and 2250X, were assembled. The outside measurements performed with direct normally irradiance (DNI) sun radiation showed the value of acceptance angle at levels of ±3.2°, ±1.9° and ±1.2° for the aforementioned concentration ratios of 380X, 900X and 2250X, respectively. © 2013 AIP Publishing.


Eiselen S.,Bayerisches Laserzentrum GmbH | Eiselen S.,Friedrich - Alexander - University, Erlangen - Nuremberg | Wu D.,Bayerisches Laserzentrum GmbH | Galarneau P.,Institute National dOptique INO | And 2 more authors.
Physics Procedia | Year: 2013

New pulse shaping possibilities using pulsed lasers in the nanosecond range offer entirely new approaches at influence and investigate laser-matter- interactions. The authors report on the influence of the temporal energy input on ablation of metal using arbitrarily shaped infrared nanosecond laser pulses. The importance of a proper description of time-resolved energy input by using the accumulated energy is demonstrated in theoretical considerations as well as experimental investigations. The presented results clearly show that any averaging over pulse duration results in missing information about time-dependent interactions and can at the same time lead to significant differences in ablation results. © 2013 The Authors.


Eshelman E.,York University | Daly M.G.,York University | Slater G.,McMaster University | Dietrich P.,MDA Inc | Gravel J.-F.,Institute National dOptique INO
Planetary and Space Science | Year: 2014

A UV Raman instrument holds great promise for future in-situ astrobiology investigations on Mars and elsewhere in the solar system due to its potential for high organic sensitivity, stand-off detection, and detection on unprepared samples. We characterize the fluorescence spectra of a range of organic compounds including amino acids, fatty acids, alkanes, and polycyclic aromatic hydrocarbons (PAHs) at three UV excitations to determine at what Raman excitation fluorescence is minimized. Both Raman and fluorescence measurements indicate that a Raman instrument operating with an excitation of 266 nm will result in less fluorescence compared to an excitation of 355 nm. Raman spectra of organic compounds at a 1% concentration in a silica sand matrix are obtained at an excitation wavelength of 266 nm, and demonstrate either an absence of fluorescence or a reduction of fluorescence to a magnitude on the order of the Raman intensity, increasing the sensitivity of the instrument to organic compounds. © 2014 Elsevier Ltd.


Jousselme A.-L.,Defense R and D Canada Valcartier | Maupin P.,Defense R and D Canada Valcartier | Debaque B.,Institute National dOptique INO | Prevost D.,Institute National dOptique INO
15th International Conference on Information Fusion, FUSION 2012 | Year: 2012

Designing an optimal video camera network for monitoring ground activities is a critical problem to ensure sufficient performance in video surveillance system. Several authors have addressed this issue in the past, and considered this problem to be essentially a coverage optimization problem. Because of its nature and complexity, this problem is considered to be a multiobjective global optimization problem. In this paper we propose a basic concept for the design of a decision support tool for the deployment of C4ISR systems in general and Ground Air Traffic Control systems in particular. A novel and general formulation of coverage based on distance degraded ROC curves is proposed. This representation allows the user to define in a flexible as well as expressive way a wide variety of constraint combinations to build a sensor placement solution. Visualizations are provided to the user for a meaningful selection among the optimal solution computed. First results with the proposed approach are presented on a Ground Air Traffic Control case study aiming at the positioning of camera networks for the detection and localization of moving objects on runways. © 2012 ISIF (Intl Society of Information Fusi).


Jousselme A.-L.,Defense R and D Canada Valcartier | Boury-Brisset A.-C.,Defense R and D Canada Valcartier | Debaque B.,Institute National dOptique INO | Prevost D.,Institute National dOptique INO
FUSION 2014 - 17th International Conference on Information Fusion | Year: 2014

Physical sensors (hard sources) and humans (soft sources) have complementary features in terms of perception, reasoning, memory. It is thus natural to combine their associated information for a wider coverage of the diversity of the available information and thus provide an enhanced situation awareness for the decision maker. While the fusion domain mainly considers (although not only) the processing and combination of information from hard sources, conciliating these two broad areas is gaining more and more interest in the domain of hard and soft fusion. In order to better understand the diversity and specificity of sources of information, we propose a functional model of a source of information, and a structured list of dimensions along which a source of information can be qualified. We illustrate some properties on a real data gathered from an experiment of light detection in a fog chamber involving both automatic and human detectors. © 2014 International Society of Information Fusion.


Trademark
Institute National Doptique and Institute National Doptique Ino | Date: 2011-11-29

A solid or semi-solid polymer-based material that simulates the optical properties of biological tissues and can be made in various shapes, used as a reference sample in visible and near-infrared optical imaging, molecular imaging and light dose simulation for scientific and medical research use.


Weber J.R.,Institute national doptique INO | Baribeau F.,Institute national doptique INO | Grenier P.,Institute national doptique INO | Emond F.,Institute national doptique INO | And 7 more authors.
Biomedical Optics Express | Year: 2014

Proof of concept results are presented towards an in situ bimodal proximity sensor for neurovascular bundle detection during dental implant surgery using combined near infrared absorption (NIR) and optical coherence tomography (OCT) techniques. These modalities are shown to have different sensitivity to the proximity of optical contrast from neurovascular bundles. NIR AC and DC signals from the pulsing of an artery enable qualitative ranging of the bundle in the millimeter range, with best sensitivity around 0.5-3mm distance in a custom phantom setup. OCT provides structural mapping of the neurovascular bundle at sub-millimeter distances in an ex vivo human jaw bone. Combining the two techniques suggests a novel ranging system for the surgeon that could be implemented in a "smart drill." The proximity to the neurovascular bundle can be tracked in real time in the range of a few millimeters with NIR signals, after which higher resolution imaging OCT to provide finer ranging in the submillimeter distances. © 2013 Optical Society of America.


Paradis P.-F.,Institute National DOptique INO | Ishikawa T.,Japan Aerospace Exploration Agency | Okada J.T.,Japan Aerospace Exploration Agency
Johnson Matthey Technology Review | Year: 2014

This review briefl y describes the vacuum electrostatic levitation furnace developed by JAXA and the associated non-contact techniques used to measure the density, the surface tension and the viscosity of materials. The paper then presents a summary of the data taken with this facility in the equilibrium liquid and non-equilibrium liquid phases for the six platinum group metals (pgms): platinum, palladium, rhodium, iridium, ruthenium and osmium over wide temperature ranges that include undercooled and superheated phases. The presented data (density, surface tension and viscosity of Pt, Rh, Ir, Ru and Os and density of Pd) are compared with literature values. © 2014 Johnson Matthey.


Proulx C.,Institute National dOptique INO | Allard M.,Institute National dOptique INO | Pope T.,Institute National dOptique INO | Tremblay B.,Institute National dOptique INO | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

The Broadband Radiometer (BBR) is an instrument being developed for the ESA EarthCARE satellite. The BBR instrument objective is to provide measurements of the reflected short-wave (0.25-4.0 μm) and emitted long-wave (4.0- 50 μm) TOA radiance over three along-track views (forward, nadir and backward). The instrument has three fixed telescopes, one for each view, each containing a broadband detector. Each detector consists of an uncooled focal plane array (FPA) hybridized with a readout integrated circuit (ROIC) and a proximity electronics circuit-card assembly (CCA) packaged in an aluminum base plate with cover. The detectors, based on INO's VOx microbolometer technology, are required to provide fast pixel response time (< 6 ms), uniform spectral response over the entire spectral range (achieved by the development of a gold black absorber), and low NEDT under the instrument operating conditions. The detectors development has now passed the critical design review (CDR) and various development units (among which the most recent is the engineering model (EM)) have been shown to meet the specification requirements. This paper first provides a description of the detector design, followed by its principles of operation. It further presents and discusses measurement and analysis results for the performance characterization of the engineering model in the context of the applicable requirements. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Libois Q.,University of Quebec at Montréal | Proulx C.,Institute National dOptique INO | Ivanescu L.,University of Quebec at Montréal | Coursol L.,University of Quebec at Montréal | And 5 more authors.
Atmospheric Measurement Techniques | Year: 2016

A far infrared radiometer (FIRR) dedicated to measuring radiation emitted by clear and cloudy atmospheres was developed in the framework of the Thin Ice Clouds in Far InfraRed Experiment (TICFIRE) technology demonstration satellite project. The FIRR detector is an array of 80 × 60 uncooled microbolometers coated with gold black to enhance the absorptivity and responsivity. A filter wheel is used to select atmospheric radiation in nine spectral bands ranging from 8 to 50 m. Calibrated radiances are obtained using two well-calibrated blackbodies. Images are acquired at a frame rate of 120 Hz, and temporally averaged to reduce electronic noise. A complete measurement sequence takes about 120 s. With a field of view of 6°, the FIRR is not intended to be an imager. Hence spatial average is computed over 193 illuminated pixels to increase the signal-to-noise ratio and consequently the detector resolution. This results in an improvement by a factor of 5 compared to individual pixel measurements. Another threefold increase in resolution is obtained using 193 non-illuminated pixels to remove correlated electronic noise, leading an overall resolution of approximately 0.015 W m-2 sr-1. Laboratory measurements performed on well-known targets suggest an absolute accuracy close to 0.02 W m-2 sr-1, which ensures atmospheric radiance is retrieved with an accuracy better than 1 %. Preliminary in situ experiments performed from the ground in winter and in summer on clear and cloudy atmospheres are compared to radiative transfer simulations. They point out the FIRR ability to detect clouds and changes in relative humidity of a few percent in various atmospheric conditions, paving the way for the development of new algorithms dedicated to ice cloud characterization and water vapor retrieval. © Author(s) 2016.

Loading Institute National dOptique INO collaborators
Loading Institute National dOptique INO collaborators