Plasma effect on weld pool surface reconstruction by shape-from-polarization analysis

Journal Article · Mon Mar 31 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4870505· OSTI ID:22261625

Coniglio, N.; Aubreton, O.; Stolz, C. ^[1]

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1. Université de Bourgogne Laboratoire Le2i UMR CNRS 6306, allée Alain Savary, 21000 Dijon (France)

The polarimetric state of the thermal radiations emitted by the weld metal contains geometric information about the emitting surface. Even though the analysed thermal radiation has a wavelength corresponding to a blind spectral window of the arc plasma, the physical presence of the arc plasma itself interferes with the rays radiated by the weld pool surface before attaining the polarimeter, thus modifying the geometric information transported by the ray. In the present work, the effect of the arc plasma-surrounding zone on the polarimetric state and propagation direction of the radiated ray is analyzed. The interaction with the arc plasma zone induces a drop in ray intensity and a refraction of ray optical path.

• OSTI ID: 22261625
• Journal Information: Applied Physics Letters, Vol. 104, Issue 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POLARIZATION
SURFACES
THERMAL RADIATION
WELDED JOINTS