29/03/2024
Status and Developments in Geological Remote SensingR.D. Hewson et al.
Recent improvements and availability of optical to infrared to thermal satellite and airborne sensors opens up the opportunity for advancing surface mineralogy and geological mapping. Such mapping may include the identification of alteration zones for exploration activities or monitoring ore quality and inventory within open cuts. Remote sensing technology is also on...
29/03/2024
Using Longwave Infrared Hyperspectral Imaging for a Quantitative Atmospheric Tracer Monitoring in Outdoor EnvironmentsEitan Hirsch, Eyal Agassi, Alon Manor.
Quantitative real-time retrieval of concentration-lengths (CL) through gaseous plumes is an important tool for environmental monitoring, enabling remote monitoring of emissions from industrial facilities and risk assessment
in scenarios of toxic gas releases. The adoption of LWIR (Long Wave Infra-Red) hyperspectral imaging as a leading techniqu...
29/03/2024
Rate dependency and ply thickness influence on transverse cracking evolution in cross-ply laminatesF. Coussa, J. Berthe, M. Ragonet.
In this study, the rate dependency of transverse cracking evolution in cross-ply laminates is investigated for several 90° plies thicknesses. The crack detection methodology is based on a recently proposed protocol relying on the use of infrared thermography. A new analysis methodology is proposed to make it more robust and to directly link the spatial...
29/03/2024
New Zealand field-scale fire experiments to test convective heat transfer in wildland firesWildfire physics has traditionally been studied through intensive modelling that requires numerous assumptions of combustion and heat transfer (Sullivan 2009) adapted from established structure-fire engineering relations. Renewed emphasis in experimental research has caused rethinking of some of the most basic concepts in wildland fuel particle ignition and flame spread. New findings from la...
29/03/2024
Thermal Infrared Hyperspectral Imaging for Mineralogy Mapping of a Mine FaceRemote sensing systems are largely used in geology for regional mapping of mineralogy and lithology mainly from airborne or spaceborne platforms. Earth observers such as Landsat, ASTER or SPOT are equipped with multispectral sensors, but suffer from relatively poor spectral resolution. By comparison, the existing airborne and spaceborne hyperspectral systems are capable of acquiring imagery ...
29/03/2024
Continuum Removal for Ground Based LWIR Hyperspectral Infrared Imagery Applying Non-Negative Matrix FactorizationContinuum removal is vital in hyperspectral image analysis. It enables data to be used for any application and usually requires approximations or assumptions to be made. One of these approximations is related to the calculation of the spectra of the background’s blackbody temperature. Here, we present a new method to calculate the continuum removal process. The proposed method eliminates the...
29/03/2024
Comparison Assessment of Low Rank Sparse-PCA Based – ClusteringThe developments in hyperspectral technology in different applications are known in many fields particularly in remote sensing, airborne imagery, mineral identi- fication and core logging. The automatic mineral identification system provides considerable assistance in geology to identify mineral automatically. Here, the proposed approach addresses an automated system for mineral (i.e. pyrope...
29/03/2024
Object Tracking by Hierarchical Decomposition of Hyperspectral Video Sequences: Application to Chemical Gas Plume TrackingIt is now possible to collect hyperspectral video sequences at a near real-time frame rate. The wealth of spectral, spatial, and temporal information of those sequences is appealing for various applications, but classical video processing techniques must be adapted to handle the high dimensionality and huge size of the data to process. In this paper, we introduce a novel method based on the ...
29/03/2019
Electronic Imaging DetectorThis paper discusses the use of a microchannel plate phosphor screen-based detector paired with a camera, which can capture images from the phosphor screen in real time. It can be used for VUV Spectroscopy, Imaging TOF or High Energy Physics Applications
02/04/2024
LINCam : Working principleWe present a detector system with a microchannel plate based photomultiplier tube (MCP-PMT) and its application for fluorescence lifetime imaging (FLIM) in visible light. A capacity coupled imaging technique (charge image) combined with a charge division anode is employed for the positional readout. Using an artificial neural network's (ANN) computation model we are able to reconstruct the p...
02/04/2024
SPAD LINCam comparisonA recent addition to the toolboxof super-resolution microscopy methodsis fluorescence-lifetime single-molecule local-ization microscopy(FL-SMLM).Thesynergyof SMLMandfluorescence-lifetime imaging microscopy(FLIM) combines superior imagere solution with lifetime information and can be realized using two complementary experimental approaches: confocal-laser scan-ning microscopy(CLSM) or &...
29/03/2019
Experimental Evaluation of Resistive Glass Ion OpticsResistive Glass is formed into a Reflectron Lens and evaluated for resistance uniformity and directly compared to the performance of a stacked ring assembly Reflectron. Results show that Resistive Glass is well suited for making ion optics components that simplify cleaning and replacement.
29/03/2019
HI-QE PaperBased on conventional S-20 processes, a new series of high quantum efficiency (QE) photocathodes has been developed that can be specifically tuned for use in the ultraviolet, blue or green regions of the spectrum. The QE values exceed 30% at maximum response, and the dark count rate is found to be as low as 30 Hz/cm2 at room temperature. This combination of properties along with a fast tempo...
29/03/2019
High Dynamic Range Ion Detection Using Channel Electron MultipliersImproving the dynamic range of a channel electron multiplier to operate at high output current. The paper discusses the addition of discrete dynodes to a six-channel electron multiplier to achieve this operation and examines the effect on the lifetime of the detector.
29/03/2019
HQE S20 Photocathodes in Photon Counting ApplicationsHigh Quantum Efficiency S20 Photocathodes in Photon Counting Applications
Improvements were done to a standard S20 photocathode that increase the quantum efficiency by up to 50%. Test results on a Chevron style MCP-PMT are presented.