Abstract

A technique has been evolved for using optical fibers and near ir detectors for conveying temperature information from a surface to be welded. The application is unique, in that the optical fiber is permitted to contact the hot elements of the weld. The ensuing degradation is tolerated, since for the welding context, it appears to be considerably more stable than variations of emissivity found with conventional radiometric devices. Plots of experimental data using the device described indicate close correlation between temperature during weld formation and weld quality.

© 1968 Optical Society of America

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