| Numéro |
J. Phys. IV France
Volume 04, Numéro C7, Juillet 1994
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique |
|
|---|---|---|
| Page(s) | C7-319 - C7-322 | |
| DOI | https://doi.org/10.1051/jp4:1994776 | |
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-319-C7-322
DOI: 10.1051/jp4:1994776
1 Institut für Lasertechnologien in der Medizin (ILM) an der Universität Ulm, Arbeitsgruppe Lasermesstechnik, Helmholtzstr. 12, 89081 Ulm, Germany
2 Universität Ulm, Abteilung für Mess-, Regel- und Mikrotechnik (MRM), Bereich Messtechnik, Albert-Einstein-Allee 41, 89069 Ulm, Germany
© EDP Sciences 1994
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-319-C7-322
DOI: 10.1051/jp4:1994776
Analysis of surface layer variations by photothermal means
G. Goch1, 2, J. Geerkens1, M. Reick1 and B. Schmitz11 Institut für Lasertechnologien in der Medizin (ILM) an der Universität Ulm, Arbeitsgruppe Lasermesstechnik, Helmholtzstr. 12, 89081 Ulm, Germany
2 Universität Ulm, Abteilung für Mess-, Regel- und Mikrotechnik (MRM), Bereich Messtechnik, Albert-Einstein-Allee 41, 89069 Ulm, Germany
Abstract
The geometrical and physical properties of the surface and the near-surface layers
can be modified by a mechanical or a thermal impact. If these variations are coupled with a
modification of the thermal properties, they become detectable by photothermal means. In
order to perform some fundamental experiments, we chose the Vickers hardness test as a
model for a slight and reproducible mechanical impact. The surroundings near the deformed
areas were scanned ; the optical beam deflection as well as the radiometric signal were
measured and compared with the optical microscopic images.
© EDP Sciences 1994