6533b838fe1ef96bd12a3bd2

RESEARCH PRODUCT

Characterizing weld pool surfaces from polarization state of thermal emissions

Alexandre MathieuChristophe StolzOlivier AubretonN. Coniglio

subject

WavefrontLiquid metalMaterials sciencebusiness.industry02 engineering and technologyPlasma021001 nanoscience & nanotechnologyPolarization (waves)01 natural sciencesAtomic and Molecular Physics and OpticsPhysics::Geophysics010309 opticsWavelengthOptics0103 physical sciencesThermal[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicWeld pool[ SPI.OPTI ] Engineering Sciences [physics]/Optics / Photonic0210 nano-technologybusinessRefractive indexPhysics::Atmospheric and Oceanic Physics

description

International audience; In this Letter, a vision-based remote sensing methodology is proposed to measure the topography of weld pool surfaces from one single view. Thermal radiations emitted by the hot liquid metal at a wavelength within the arc plasma blind spectral window are acquired by a wavefront division polarimetric system. The refractive index of the liquid metal and the topography of the weld pool surface are inferred from the polarimetric state of the thermal radiations.

https://doi.org/10.1364/ol.38.002086