The knowledge of the amplitude and spatial distribution an excitation flux is great interest for quantification heat sources. In this work, development a non-contact imaging powermeter based on association bolometer with infrared camera described. This allows, thanks to thermographic measurements image processing methods, quantitative estimation power delivered by high-power laser. First, experimental setup used Then, complete modelling transfer within using 3D thermal quadrupole formalism...

Knowledge of material emissivity maps and their true temperatures is great interest for contactless process monitoring control with infrared cameras when strong heat transfer temperature change are involved. This approach always followed by or reflections issues. In this work, we describe the development a imaging technique based on pyro-reflectometry specular model reflection in order to overcome emissivities problems. enables situ real-time identification fields autocalibration radiative...

Abstract This work reports a multispectral tomography technique in transmission mode (called 3DITI for 3D Infrared Thermospectroscopic Imaging) based on middle wavelength infrared (MWIR) focal plane array. relies an MWIR camera (1.5 to 5.5 μm) used combination with IR monochromator (400 nm 20 μm), and sample mounted rotary stage the measurement of its transmittance at several angular positions. Based projections expressed terms sinogram, spatial three-dimensional (3D) cubes (proper emission...

Knowledge of the spatial and temporal distribution heat flux is great interest for quantification sources. In this work, we describe development a new ultra-broadband contactless imaging power meter based on electromagnetic to infrared technology. This sensor mathematical processing images enable reconstruction both amplitude distributions through wide spectral range The full modeling thermoconverter 3D formalism thermal quadrupoles presented first before deriving reduced model more suitable...

Putting small particles in levitation and transient thermal imbalance a gas has several advantages. This avoids chemical pollution through contact with solid wall. The large exchange surface between the particle surrounding volume can be considered as microfluidic situations acceleration of transfers, rapidly isothermal particles, low-cost cycling, extreme temperature conditions facilitated. Several results related to characterization case fluidic acoustic methods are presented. It consists...

This work reports on a terahertz tomography technique using constant velocity flying spot scanning as illumination. is essentially based the combination of hyperspectral thermoconverter and an infrared camera used sensor, source radiation held translation scanner, vial hydroalcoholic gel sample mounted rotating stage for measurement its absorbance at several angular positions. From projections made in 2.5 h expressed terms sinograms, 3D volume absorption coefficient reconstructed by...

The study of the response a temperature field (recorded from IR cameras) to laser spot heating is increasingly used for NDE (Non Destructive Evaluation) applications. most classical type application use flying in order detect vertical cracks and/or measure plane thermal diffusivity relation observation opaque materials. But several other ways applications are presented here related tomography and also super resolution. Instead materials applications, using principles spot. It consists an...

Terahertz waves have been shown to be an effective contactless, safe, and low-cost technique that allows investigate nondestructive testing or water diffusion within porous media, such as biomaterial insulation materials [1,2].Few years ago a THz camera based on infrared coupled with photothermal converter was developed [3] in our group.Here we report recent advances large image scanning reconstruction processing.The goal is realize A4 images from x,y scan (cf.figure 1) composed of ROI (from...

Plasma torches are a type of source that generates very high temperatures.They mainly used in surface treatment applications and ultimate waste treatment.The knowledge the temperature field plasma is prime interest for researchers industry to model optimize torch design.First experiments measure were reported by J.-L.Gardarein et al.[1] using probe with thermocouple directly inserted into plasma.This first measurement led heat flux, but it was an intrusive method which gives only single...

The estimation of physical properties in complex materials and boundary conditions such as flux or temperature at the interface require development inverse method.When used combination imaging techniques using an IR camera, methods can be to estimate transient spatial distribution heat flux, material [1].The choice method directly linked parameters that need identified.In this work, we report based on integral cosine transforms amplitude well in-plane diffusivities a homogenous copper block.

Abstract Knowledge of material emissivity maps and their true temperatures is great interest for contactless process monitoring control with infrared cameras when strong heat transfer temperature change are involved.In this work, we describe the development a multispectral imaging technique based on pyro-reflectometry approach specular model reflection.This enables in situ real-time identification fields autocalibration radiative intensity leaving sample by using black body equivalent...