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Proceedings Paper

Application of the laser-induced photopyroelectric effect for measuring the thermal effusivity of some (semi) liquid foodstuffs
Author(s): Stephane Longuemart; Alberto G. Quiroz; Dorin Dadarlat; Edson Correa da Silva; Antonio Manoel Mansanares; Abdelah H. Sahraoui; Corinne Kolinsky; Jean M. Buisine; Xenia Filip; Camelia Neamtu
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Paper Abstract

The photopyroelectric calorimetry, in the front (inverse) configuration, was applied in order to measure the thermal effusivity of some Brazilianfats. The front configuration with thermally thick sensor and sample, and optically opaque sensor, was used for the first time for analysing the thermal properties of fat products. The information was obtained via a frequency scan of the phase of the pyroelectric signal; the measurement needs no calibration. The main advantage of this configuration on the other two front schemes proposed before is mainly technical: one has not to use very thin foils or expensive semitransparent sensors. On the other hand, the information is contained in the phase of the signal (and not in the amplitude - as usual) which is not dependent on the power fluctuations of the radiation source.

Paper Details

Date Published: 9 August 2002
PDF: 5 pages
Proc. SPIE 4762, ALT'01 International Conference on Advanced Laser Technologies, (9 August 2002); doi: 10.1117/12.478636
Show Author Affiliations
Stephane Longuemart, Univ. du Littoral (France)
Alberto G. Quiroz, Univ. Estadual de Campinas (Brazil)
Dorin Dadarlat, National Institute for Research and Development of Isotopic and Molecular Technologies (Romania)
Edson Correa da Silva, Univ. Estadual de Campinas (Brazil)
Antonio Manoel Mansanares, Univ. Estadual de Campinas (Brazil)
Abdelah H. Sahraoui, Univ. du Littoral (France)
Corinne Kolinsky, Univ. du Littoral (France)
Jean M. Buisine, Univ. du Littoral (France)
Xenia Filip, National Institute for Research and Development of Isotopic and Molecular Technologies (Romania)
Camelia Neamtu, National Institute for Research and Development of Isotopic and Molecular Technologies (Romania)


Published in SPIE Proceedings Vol. 4762:
ALT'01 International Conference on Advanced Laser Technologies

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