Fast infrared imaging spectroscopy technique (FIIST)

Multispectral IR thermotransmittance technique for temperature measurement

“…As a consequence, the spectrum in figure 3.a seems to have a very important thermal dependency w hereas they are mainly affected by the proper emission dependency. This illustrates the first interest of the tw o images technique [5][6] that is to have the possibility to subtract this thermal dependent baseline. Then, by making this subtraction, only the spectrum as function of temperature can be plotted in figure 3.b.…”

“…The infrared spectra w ere acquired using the synchronization of the monochromator and the IR camera by using a mechanical chopper w ith homemade LabVIEW softw are to control the acquisition frequency and to scan the w avelength over the domain of interest. As a consequence, w ith the set-up described in figure 1, and as already demonstrated in previous papers [5][6] the acquired signal is based on tw o images techniques w hich are function of several contributions as follow :…”

Microscale spectroscopic thermal imaging of n-alkanes

“…The simultaneous acquisition of thermal and spectroscopic images was performed at 200 Hz alternating acquisition of two kinds of images. They are processing with the two images technique [14], and converted to both spectroscopic and thermal information.…”

“…Recently, a novel system [14][15] developed by our team, that combined two imaging techniques enabled simultaneous measurements of IR spectroscopic and thermal imaging at multiscale of the time and space. The thermal and the spectroscopic images are alternatively recorded with the synchronized signal from a chopper that attains the high simultaneity in the measurement.…”

Capability of THz for Thermo-transmittance/water content measurements of insulating materials: heat and mass transfer

“…Infrared thermography showed a capability to determine the thermal transmittance of certain solids which allows measuring full-field temperature at steady-state (at given temperature) [1]. The infrared imaging technique showed to be efficient to evaluate the heat transport properties in chemical reaction at micro scale [2]. When the sample is opaque in visible or infrared range, THz could be an efficient alternative tool for non-contact temperature imaging [3].…”