Fiber optic seam tracking apparatus

Details Fiber optic seam tracking apparatus Fiber optic seam tracking apparatus

1984-10-12

1986-09-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 1, H01J 516, H01J 4014

Patent

active

046148680

ABSTRACT:
An arc welding head suitable for robotic welding has a fiber optic bundle and remotely located laser light source which is imaged onto an end of the fiber optic bundle and optically linked to substantially a single fiber of the fiber optic bundle. The light source is then repetitively scanned across the coherent arrangement of fibers within the bundle, such that, a substantial portion of the transmitted light will be sequentially delivered to each individual fiber within a row of fibers and subsequently delivered to a workpiece. This arrangement provides a high signal to noise ratio making the laser light reflected from the workpiece easily distinguishable from the optical "noise" generated by the welding arc flash.

REFERENCES:
patent: 4208589 (1980-06-01), Dashwood et al.
patent: 4340302 (1982-07-01), Oku
patent: 4409477 (1983-10-01), Carl
patent: 4450339 (1984-05-01), Corby, Jr.
patent: 4473750 (1984-09-01), Oshida et al.

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