Title :
Magnitude and phase in thermal wave imaging
Author :
Lehto, A. ; Jaarinen, J. ; Tiusanen, T. ; Jokinen, Markku ; Luukkala, M.
Author_Institution :
University of Helsinki, Department of Physics, Helsinki, Finland
Abstract :
In thermal wave imaging on solids both magnitude and phase angle are used. However, a comparison between theoretical and experimental results is lacking even for the simple case of an air-backed metal plate. In the letter we present measurements and point out the difference between sinusoidal and square-wave intensity modulation.
Keywords :
infrared imaging; thickness measurement; 10Hz periodic heating; IR detectors; air backed metal plate case; experimental results; intensity modulated laser light; photothermal signal; sinusoidal modulation; square-wave intensity modulation; theoretical results; thermal wave imaging;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810255
