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.
© 2013 Optical Society of America
Original Manuscript: April 11, 2013
Revised Manuscript: May 14, 2013
Manuscript Accepted: May 14, 2013
Published: June 10, 2013
Nicolas Coniglio, Alexandre Mathieu, Olivier Aubreton, and Christophe Stolz, "Characterizing weld pool surfaces from polarization state of thermal emissions," Opt. Lett. 38, 2086-2088 (2013)