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Proceedings Paper

Photothermal radiometry and beam deflection studies: a metrological tool for material characterization and manufacturing control
Author(s): Bernhard Schmitz; Jurgen Geerkens; Gert Goch
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Paper Abstract

Photothermal measurement techniques offer sensing methods for the determination of material properties and for a contactless and non-destructive identification of subsurface defects and hidden structures. Our special interest in these fields is focused on the non-destructive parameter evaluation of coatings, of disturbed zones and surface layers after manufacturing processes (e.g. grinding, hardening, or cutting). Our aim is to present some theoretical aspects and experimental results of the photothermal measurement techniques with respect to a non- destructive and reliable thermal material characterization and to an identification of subsurface defects and hidden structures. Two different photothermal detection techniques have been used: the optical beam deflection and the radiometric method. The results combined with image processing routines and numerical data analysis may be used in order to characterize the materials' properties and their response to different kind of loadings.

Paper Details

Date Published: 22 October 1993
PDF: 12 pages
Proc. SPIE 2066, Industrial Optical Sensing and Metrology: Applications and Integration, (22 October 1993); doi: 10.1117/12.162113
Show Author Affiliations
Bernhard Schmitz, Institut fuer Lasertechnologien in der Medizin (Germany)
Jurgen Geerkens, Institut fuer Lasertechnologien in der Medizin (Germany)
Gert Goch, Institut fuer Lasertechnologien in der Medizin and Univ. Ulm (Germany)


Published in SPIE Proceedings Vol. 2066:
Industrial Optical Sensing and Metrology: Applications and Integration
Kevin G. Harding; H. Philip Stahl, Editor(s)

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