Remote optical power and focus monitoring in pulsed Nd:YAG laser welding

Cheol-Jung Kim; Sung-Hoon Baik; Min Seok Kim; Chin-Man Chung

doi:10.1117/12.270126

4 April 1997 Remote optical power and focus monitoring in pulsed Nd:YAG laser welding

Cheol-Jung Kim, Sung-Hoon Baik, Min Seok Kim, Chin-Man Chung

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270126
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

The thermal radiation from the weld-pool is measured at two wavelengths through the laser delivery fiber between Nd:YAG laser pulses. The chromatic aberration of delivery optics has been optimized to detect the variation of weld bead width. The design of optics and the signal processing algorithm for optical monitoring is described. Furthermore, the applications of optical monitoring to the detection of power variation and focus shift are shown.

Citation Download Citation

Cheol-Jung Kim, Sung-Hoon Baik, Min Seok Kim, and Chin-Man Chung "Remote optical power and focus monitoring in pulsed Nd:YAG laser welding", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270126

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