Development of a hyperspectral imaging technique for monitoring laser-based material processing
| Autor: | Tobias Staudt, Florian Klämpfl, Michael Schmidt, Felix Tenner |
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| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Materials science Basis (linear algebra) business.industry Biomedical Engineering Process (computing) Hyperspectral imaging Laser beam welding 02 engineering and technology Laser 01 natural sciences Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials law.invention 010309 optics 020901 industrial engineering & automation Optics law 0103 physical sciences Spectral resolution business Instrumentation Absolute zero Remote sensing |
| Zdroj: | Journal of Laser Applications. 29:022601 |
| ISSN: | 1938-1387 1042-346X |
| Popis: | In this paper, a new observation technique for monitoring laser-based material processing on the basis of hyperspectral imaging (HSI) is presented. HSI techniques integrate both spatial and spectral information upon the object/process to be investigated. Essentially, the spectral information can be used to derive the absolute temperature of the object/process. The presented observation tool employing HSI-techniques comprises a high-speed camera and a self-developed HSI-lens system. It offers a time resolution in the microsecond-range and a spectral resolution of ∼4 nm. A proof-of-concept of temperature determination based upon HSI-derived spectra is given, and the initial observation results of the laser welding process are presented. These observations include the temperature evolution of the melting process of two different metal alloys over time. Moreover, we can show that the maximal temperature in the process zone does not exceed the evaporation temperature when processing construction steel and alum... |
| Databáze: | OpenAIRE |
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