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Proceedings Paper

Automatic laser-based material identification and marking: a new approach
Author(s): Ruediger Quay; R. Sattmann; Reinhard Noll
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Paper Abstract

Laser-Induced Breakdown Spectroscopy (LIBS) is a remote, online, in situ technique used for the quantitative analysis of elemental constituents in matrices such as steels, non ferrous metals, polymers and soils. A typical industrial application already established is the sorting of non ferrous metals for the purpose of recycling. A new device, the Laser Identification and Marking System introduced here, uses a combination of material identification by means of LIBS and instantly marking the workpiece using the same Nd:YAG laser. This method was developed since the application required a strongly decreased probability of mixing up of different steel qualities in comparison to conventional methods. At the same time a decisive disadvantage of LIBS, the insufficient detection limits for several elements, can be lowered by using repetitive bursts of multiple laser pulses.

Paper Details

Date Published: 18 August 1997
PDF: 8 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281100
Show Author Affiliations
Ruediger Quay, Fraunhofer-Institut fuer Lasertechnik (Germany)
R. Sattmann, Fraunhofer-Institut fuer Lasertechnik (Germany)
Reinhard Noll, Fraunhofer-Institut fuer Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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