Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Experimental setup. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /

Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Spectral lines within the range to be considered. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /

Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Example of a reference weld seam without defects. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /

Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Detection of weld seam defects with different techniques. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /

Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Detection of weld seam crater. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /

Date of download: 5/30/2016 Copyright © 2016 SPIE. All rights reserved. Detection of gas cut. Figure Legend: From: Robust technique for spectroscopic plasma analysis with application in real-time arc welding quality monitoring Opt. Eng. 2006;45(8): doi: /