Focus control system for laser welding

Francis M. Haran; Duncan P. Hand; Chris Peters; J. D C Jones

doi:10.1364/AO.36.005246

Focus control system for laser welding

Francis M. Haran, Duncan P. Hand, Chris Peters, J. D C Jones

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

We describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fiber delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error as a result of chromatic aberrations in the optical delivery system. Focus control is demonstrated for bead-on-plate welds in different thicknesses of titanium alloy, aluminum alloy, mild steel, and stainless steel. The control system works for both pulsed and continuous laser radiation. © 1997 Optical Society of America.

Original language	English
Pages (from-to)	5246-5251
Number of pages	6
Journal	Applied Optics
Volume	36
Issue number	21
DOIs	https://doi.org/10.1364/AO.36.005246
Publication status	Published - 20 Jul 1997

Keywords

Laser welding
Process monitoring and control

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10.1364/AO.36.005246

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abstract = "We describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fiber delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error as a result of chromatic aberrations in the optical delivery system. Focus control is demonstrated for bead-on-plate welds in different thicknesses of titanium alloy, aluminum alloy, mild steel, and stainless steel. The control system works for both pulsed and continuous laser radiation. {\textcopyright} 1997 Optical Society of America.",

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AB - We describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fiber delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error as a result of chromatic aberrations in the optical delivery system. Focus control is demonstrated for bead-on-plate welds in different thicknesses of titanium alloy, aluminum alloy, mild steel, and stainless steel. The control system works for both pulsed and continuous laser radiation. © 1997 Optical Society of America.

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KW - Process monitoring and control

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Focus control system for laser welding

Abstract

Keywords

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