Emissivity measurements on historic building materials using dual-wavelength infrared thermography

Antonia Moropoulou; Nicolas P. Avdelidis

doi:10.1117/12.420995

23 March 2001 Emissivity measurements on historic building materials using dual-wavelength infrared thermography

Antonia Moropoulou, Nicolas P. Avdelidis

Proceedings Volume 4360, Thermosense XXIII; (2001) https://doi.org/10.1117/12.420995
Event: Aerospace/Defense Sensing, Simulation, and Controls, 2001, Orlando, FL, United States

Abstract

The most reliable method to obtain correct emissivity values for the infrared thermographic systems and applications is to determine the emissivity of the targets to be tested. Although this approach is not possible during in situ applications, samples of the targets can be collected and measured, as in this work, in the laboratory. In the present work, the emissivity values of selected historic building materials were measured at a variety of temperatures, in the 3-5.4 micrometers and 8-12 micrometers regions of the infrared spectrum. Porous stones from the Mediterranean area and marbles, used as historic building materials, were investigated. The examined materials presented different emissivity values, caused by their surface state and microstructure. In addition, the effect of temperature and wavelength on the emissivity values of such historic building materials was also considered.

Citation Download Citation

Antonia Moropoulou and Nicolas P. Avdelidis "Emissivity measurements on historic building materials using dual-wavelength infrared thermography", Proc. SPIE 4360, Thermosense XXIII, (23 March 2001); https://doi.org/10.1117/12.420995

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