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Device for characterization of thermal effusivity of liquids using photothermal beam deflection
G E Sandoval-Romero1, A García-Valenzuela, C Sánchez-Pérez
1Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, A. P. 70-186, Distrito Federal 04510, Mexico.
Abstract:
We propose and study a novel optoelectronic device for thermal characterization of materials. It is based on monitoring the photothermal deflection of a laser beam within a slab of a thermo-optic material in thermal contact with the sample under study. An optical angle sensor is used to measure the laser deflection providing a simple and experimental arrangement. We demonstrate its principle and a simple procedure to measure thermal effusivity of liquids. The proposed device could be implemented into a compact sensor head for remote measurements using electrical and fiber optic links.
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