Quantitative characterization of material inhomogeneities by thermal waves

Uwe R. Seidel; Ton Thi Ngoc Lan; Heinz-Guenter Walther; Bernhard Schmitz; Jurgen Geerkens; Gert Goch

doi:10.1117/1.601235

1 February 1997 Quantitative characterization of material inhomogeneities by thermal waves

Uwe R. Seidel, Ton Thi Ngoc Lan, Heinz-Guenter Walther, Bernhard Schmitz, Jurgen Geerkens, Gert Goch

Optical Engineering, Vol. 36, Issue 2, (February 1997). https://doi.org/10.1117/1.601235

Photothermal measurement techniques offer the possibility to determine thermal properties on and below the sample’s surface. Thus, subsurface thermal inhomogeneities such as defects, buried structures, and continuous profiles of thermal parameters become accessible by photothermal means. Our special interest is focused on the quantitative characterization of material modifications in near-surface layers that are induced by thermal (such as hardening) or mechanical (such as grinding) treatments of the surface as well as the reconstruction of a subsurface structure’s depth, size, and defect strength. Altogether, these investigations are aimed to develop photothermal techniques toward a true quantitative and noncontact inspection method for the nondestructive evaluation of opaque solids.

Citation Download Citation

Uwe R. Seidel, Ton Thi Ngoc Lan, Heinz-Guenter Walther, Bernhard Schmitz, Jurgen Geerkens, and Gert Goch "Quantitative characterization of material inhomogeneities by thermal waves," Optical Engineering 36(2), (1 February 1997). https://doi.org/10.1117/1.601235

Published: 1 February 1997

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