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Proceedings Paper

Development of in-process monitoring technique in YAG laser welding
Author(s): Yasumasa Nakashima; Ken-ichi Kamimuki; Tokuhiro Nakabayashi; Kouichi Yoshida
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Paper Abstract

We have studied in-process monitoring technique in Nd:YAG laser welding. We used a CCD camera and a photodiode as the monitoring sensor, and observed laser processing coaxially with the laser beam. There were differences in the image of the CCD camera between full and partial penetration welding and the detection for full and partial welding was achieved by the image processing of the detected image data. And, it was suggested that a change in the focal position could be detected because a change in the luminescence intensity could be caught with the photodiode when the deviation of the focal position occurred.

Paper Details

Date Published: 3 March 2003
PDF: 5 pages
Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); doi: 10.1117/12.497924
Show Author Affiliations
Yasumasa Nakashima, Applied Laser Engineering Research Institute (Japan)
Ken-ichi Kamimuki, Kawasaki Heavy Industries, Ltd. (Japan)
Tokuhiro Nakabayashi, Kawasaki Heavy Industries, Ltd. (Japan)
Kouichi Yoshida, Kawasaki Heavy Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 4831:
First International Symposium on High-Power Laser Macroprocessing
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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