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Measuring a thermal expansion of thermoelectric materials by using in-line digital holography
Author(s)
Thong-On, Thanyarat
Date Issued
January 1, 2017
Type
Conference Paper
Abstract
In this paper, thermal expansion measurement of thermoelectric materials has been done using digital holography technique. In the experimental setup, a diode laser, a digital camera and a sample on a hot plate were put in the same alignment, so it is call Digital in-line Holography (DIH). A laser beam was expanded parallel and then propagated through a thermoelectric sample which would be heated by a hot plate from a room temperature to 224 °C. The images of a TE sample were recorded by a digital camera and analyzed data by numerical image reconstruction. From our experimental measurement result, thermoelectric material was expanded with temperature slightly, and its thermal expansion coefficient (COE) was found equal to αTE = 2.25 × 10-6 °C-1.
Citation
Proceedings of SPIE the International Society for Optical Engineering, 10022, 2017