Electric heating – Metal heating – By arc
Patent
1989-09-14
1991-07-02
Albritton, C. L.
Electric heating
Metal heating
By arc
21912163, 21912174, 21912175, B23K 2600
Patent
active
050292439
ABSTRACT:
A device for working a workpiece by means of laser light includes a laser, a beamsplitter for splitting the laserbeam into at least two sub-laserbeams of substantially identical intensities, and a control unit which controls the light intensity of the laser and the movement of a workpiece support and the laserbeam relative to each other. The beamsplitter includes at least one digital-phase grating which divides the laserbeam into a plurality of sub-laserbeams to produce a pattern of laser spots onto the workpiece.
REFERENCES:
patent: 4257673 (1981-03-01), Matthijsse
patent: 4322600 (1982-03-01), Crahay
patent: 4327277 (1982-04-01), Daly
patent: 4720621 (1988-01-01), Langen
patent: 4748614 (1988-05-01), Dammann et al.
patent: 4792658 (1988-12-01), Langhans et al.
"Synthetic digital phase gratings--Design, features, applications" by H. Dammann, Proceedings of the International Society for Optical Engineering; vol. 437, International Conference on Computer Generated Holograph, Aug. 25-26, 1983; pp. 72-78.
Dammann Hans
Patt Paul J.
Rabe Gert
Schildbach Klaus B.
Velzel Christian H. F.
Albritton C. L.
U.S. Philips Corporation
Wieghaus Brian J.
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