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Industrial far-infrared lasers for inspection and quality control

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Abstract

A fully automated far-infrared (FIR) laser prototype was instated in May 1984 on an extrusion line at Essex Power Conductor, a division of United Technologies Corp. This laser prototype was designed for on-line inspection and quality control of high-voltage cable insulation in real time during manufacturing. By means of high-speed rotating mirrors, a 300-mW Gaussian FIR laser beam scans the polyethylene insulation just after it has been extruded and cross-linked in a steam curing catenary chamber.

© 1985 Optical Society of America

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