Spectral radiative properties of glass samples

Nicolau, V.P.; Balen, Fabiano J.

doi:10.1068/htwu241

Cited by 2 publications

(3 citation statements)

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“…In order to validate the results of our inverse method based on the developed genetic algorithm, we conducted a direct measurement of the optical parameters (optical thickness τ and absorption coefficient k) by spectroscopic transmittance measurement. The calculation of the optical parameters are based on normal transmittance measurement [16] performed by a Nicolet-560 spectrometer.…”

Section: Spectroscopic Measurement Validationmentioning

confidence: 99%

“…This attenuation is due to the absorption of radiation by the medium. The transmitted radiation is modeled by Beer's Law [16], (equation ( 25)). In the case of a normal incidence the transmittivity r τ is:…”

Section: Formulationmentioning

confidence: 99%

“…Manickavasagam and Menguc [15] studied the inverse problem using Levenberg-Marquardt method for estimating the optical thickness and conduction-radiation-parameter of a 1D parallel plane medium. These radiative properties can be performed from direct measurements of reflectance and transmittance using monochromators [16] and Fourier transform infrared (FTIR) spectrometers [17].…”

Section: Introductionmentioning

confidence: 99%

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Estimation of radiative and conductive properties of a semitransparent medium using genetic algorithms

Braiek

Adili²,

Albouchi

et al. 2016

Meas. Sci. Technol.

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The aim of this work is to simultaneously identify the conductive and radiative parameters of a semitransparent sample using a photothermal method associated with an inverse problem. The identification of the conductive and radiative proprieties is performed by the minimization of an objective function that represents the errors between calculated temperature and measured signal. The calculated temperature is obtained from a theoretical model built with the thermal quadrupole formalism. Measurement is obtained in the rear face of the sample whose front face is excited by a crenel of heat flux. For identification procedure, a genetic algorithm is developed and used. The genetic algorithm is a useful tool in the simultaneous estimation of correlated or nearly correlated parameters, which can be a limiting factor for the gradient-based methods. The results of the identification procedure show the efficiency and the stability of the genetic algorithm to simultaneously estimate the conductive and radiative properties of clear glass.

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Section: Spectroscopic Measurement Validationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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