Electric heating – Metal heating – By arc
Patent
1983-05-02
1985-02-12
Albritton, C. L.
Electric heating
Metal heating
By arc
131281, 219121LP, 219121LR, 219121LS, 219121LT, B23K 2700
Patent
active
044993617
ABSTRACT:
Optical apparatus for converting a single, continuous incident laser beam into a plurality of pulsed laser beams is disclosed. The apparatus uses a rotatable first optical refracting element to cause the incident laser beam to sweep the surface of an imaginary cone. A circular or elliptical array of fixed, second optical refracting elements is placed in the path of the sweeping beam. The array is mounted in a holder of nontransmissive material. As the beam sweeps past each of the fixed second optical refracting elements, it is transmitted by that element and then interrupted by the nontransmissive material separating that element from the next fixed second optical refracting element. As the beam sweeps a complete circle or ellipse, a pulsation effect is created by the repetitive transmission and interruption, giving rise to a plurality of pulsed output beams. Such apparatus can be used in a system for perforating a web of sheet material with pulsed laser beams.
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Albritton C. L.
Giannetti Thomas L.
Ingerman Jeffrey H.
Philip Morris Incorporated
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