Focus control system for laser welding

被引：35
|
作者：
Haran, FM [1 ]
Hand, DP [1 ]
Peters, C [1 ]
Jones, JDC [1 ]
机构：
[1] LUMON LTD,RUGBY CV21 1QN,ENGLAND
来源：
APPLIED OPTICS | 1997年 / 36卷 / 21期
关键词：
laser welding; process monitoring and control;
D O I：
10.1364/AO.36.005246
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 1997 Optical Society of America.
引用
收藏
页码：5246 / 5251
页数：6
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