Real-time focus control in laser welding

Frank Haran; D. P. Hand; C. Peters; J. D C Jones

doi:10.1088/0957-0233/7/8/001

Real-time focus control in laser welding

Frank Haran, D. P. Hand, C. Peters, J. D C Jones

School of Engineering & Physical Sciences

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

22 Citations (Scopus)

Abstract

We describe a focus control system for Nd:YAG laser welding based on a non-intrusive optical sensor incorporated into the fibre delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands. Simple electronic processing gives an error 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 materials of varying thicknesses and at various welding speeds. The system was demonstrated with both pulsed and CW laser welding.

Original language	English
Pages (from-to)	1095-1098
Number of pages	4
Journal	Measurement Science and Technology
Volume	7
Issue number	8
DOIs	https://doi.org/10.1088/0957-0233/7/8/001
Publication status	Published - Aug 1996

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10.1088/0957-0233/7/8/001

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Real-time focus control in laser welding

Abstract

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