Infrared thermal-wave studies of coatings and composites

Lawrence D. Favro; Tasdiq Ahmed; D. J. Crowther; Huijia J. Jin; Pao-Kuang Kuo; Robert L. Thomas; Xun Wang

doi:10.1117/12.46446

1 March 1991 Infrared thermal-wave studies of coatings and composites

Lawrence D. Favro, Tasdiq Ahmed, D. J. Crowther, Huijia J. Jin, Pao-Kuang Kuo, Robert L. Thomas, Xun Wang

Proceedings Volume 1467, Thermosense XIII; (1991) https://doi.org/10.1117/12.46446
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

We present applications of our infrared thermal wave imaging system which was described in detail at Thermosense XII. In brief, the system consists of an infrared video camera and a real time image processor under the control of a computer workstation, together with various time- dependent heat sources. The heat sources are used to launch pulsed or periodic thermal waves into the target, and the camera is used to record the thermal waves scattered back to the surface by sub-surface thermal features (cracks, coating substrate boundaries, inter-ply delaminations, etc.). Recently we have succeeded in developing an additional capability for this instrumentation, namely the ability to make quantitative depth and thickness measurements. Furthermore, some of the authors, together with V. Vavilov of Tomsk Polytechnic, have demonstrated a capability of carrying out thermal wave tomography. We have recently extended this technique to real time with our system. We describe these recent developments and present several applications to the study of thickness variations and adhesion defects in coatings and composites.

Citation Download Citation

Lawrence D. Favro, Tasdiq Ahmed, D. J. Crowther, Huijia J. Jin, Pao-Kuang Kuo, Robert L. Thomas, and Xun Wang "Infrared thermal-wave studies of coatings and composites", Proc. SPIE 1467, Thermosense XIII, (1 March 1991); https://doi.org/10.1117/12.46446

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available