Optical systems including polygonal mirrors rotatable about two

Details Optical systems including polygonal mirrors rotatable about two Optical systems including polygonal mirrors rotatable about two

1976-12-15

1978-07-11

Henry, Jon W.

Electric heating

Microwave heating

Tunnel furnace

219121L, G02B 2717, B23K 900

Patent

active

040998304

ABSTRACT:
An optical system suitable for use in machining plastics sheet material using a laser, brings a beam radiant energy in to a line focus on the work piece. The work piece is moving, and the line focus is perpendicular to the direction of such movement. The focused beam is scanned across the work piece in a direction having a component in the direction of motion of the workpiece so that the line focus traverses the work piece in the direction of the line focus. A cylindrical element may be used to form the line focus and a rotating polygonal mirror may perform the scanning.

REFERENCES:
patent: 2429331 (1947-10-01), Sachtleben
patent: 3264480 (1966-08-01), Zuck et al.
patent: 3543979 (1970-11-01), Grove et al.
patent: 3632955 (1972-01-01), Cruickshank
patent: 3750189 (1973-07-01), Fleischer
patent: 3932726 (1976-01-01), Veheyen et al.
patent: 3957339 (1976-05-01), Engel
Welding Research Supp., "Laser Welding of Aerospace Structural Alloys," L. P. Earudlind et al., Mar. 1966, pp. 127-s to 134-s.

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