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Proceedings Paper

Phase sensitive digitized frequency modulated thermal wave imaging and pulse compression for NDE applications
Author(s): Ravibabu Mulaveesala; Suneet Tuli
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Paper Abstract

A recently proposed novel technique for thermal non-destructive characterization based on digitized frequency modulated thermal waves is described. Defect detection in metallic, composite and semiconductor samples are presented as applications of digitized frequency modulated thermal wave imaging (DFMTWI). High peak power heat source requirement in pulsed thermography, and limited depth resolution of lock-in thermography due to fixed modulating frequency of sources, are over come by the proposed new technique by use of appropriately modulated excitation signal, limited both in time duration and frequency bandwidth.

Paper Details

Date Published: 18 April 2006
PDF: 10 pages
Proc. SPIE 6205, Thermosense XXVIII, 620515 (18 April 2006); doi: 10.1117/12.669530
Show Author Affiliations
Ravibabu Mulaveesala, Indian Institute of Technology Delhi (India)
Suneet Tuli, Indian Institute of Technology Delhi (India)


Published in SPIE Proceedings Vol. 6205:
Thermosense XXVIII
Jonathan J. Miles; G. Raymond Peacock; Kathryn M. Knettel, Editor(s)

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