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Proceedings Paper

Hot Slab Surface Inspection By Laser Scanning Method
Author(s): Toshiro Matsubara; Toshio Toyota; Akihiro Fujiyama
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Paper Abstract

An optical flaw detector with laser as the external light source, which is called LST ( laser scanning tester ), has been developed. This equipment automatically inspects the entire surface of hot slabs. The results are used to examine the suitability of those slabs for hot charge rolling. The characteristics of LST are its high optical resolving power and the signal processing method with which two-dimensional information on the type of the flaw is processed. For the opening width of O.4mm and over, the detection ratio is nearly 100%. This equipment started commercial operation in January 1983 in Nippon Steel's Yawata Works and its application has increased the hot charge rolling ratio.

Paper Details

Date Published: 23 October 1986
PDF: 8 pages
Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); doi: 10.1117/12.938769
Show Author Affiliations
Toshiro Matsubara, Nippon Steel Corporation (Japan)
Toshio Toyota, Nippon Steel Corporation (Japan)
Akihiro Fujiyama, Nippon Steel Corporation (Japan)

Published in SPIE Proceedings Vol. 0665:
Optical Techniques for Industrial Inspection
Paolo G. Cielo, Editor(s)

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