Laser removal of material from workpieces

Details Laser removal of material from workpieces Laser removal of material from workpieces

1976-07-07

1978-05-02

Truhe, J. V.

Electric heating

Metal heating

By arc

324 71E, 324 71R, 346 76L, 219121EM, B23K 2700

Patent

active

040876721

ABSTRACT:
To ascertain the beam intensity threshold at which the intensity of a laser beam will just be sufficient to engrave a workpiece, the value of a beam-intensity control signal is progressively increased or decreased until engraving starts or stops, this being sensed by detecting the initiation or termination of ionization which occurs when the beam intensity is above the threshold value adjacent a part of the workpiece which is being subjected to the action of the laser beam.

REFERENCES:
patent: 3168418 (1965-02-01), Payne, Jr.
patent: 3291959 (1966-12-01), Schleich
patent: 3297944 (1967-01-01), Nektardes et al.
patent: 3303319 (1967-02-01), Steigerwald
patent: 3316386 (1967-04-01), Yaffe et al.
patent: 3347701 (1967-10-01), Yamagishi et al.
patent: 3439263 (1969-04-01), Broyles, Jr.
patent: 3636251 (1972-01-01), Daly et al.
IBM--"Control of Evaporant in Vacuum from Output of Laser" by Potts et al., 7-1965, vol. 8, #2.

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