Laser machining device comprising an acousto-optic modulator uni

Details Laser machining device comprising an acousto-optic modulator uni Laser machining device comprising an acousto-optic modulator uni

1990-10-01

1991-08-20

Albritton, C. L.

Electric heating

Metal heating

By arc

21912162, 21912182, 21912183, B23K 2600

Patent

active

050417169

ABSTRACT:
In order to surface treat an object by a laser beam emitted along an optical path and focussed on the object, a laser machining device comprises a converter for converting clock pulses representative of relative movement between the optical path and the object into first and second clock sequences of a first clock period and a second clock period which is an integral multiple of the first clock period. Controlled by the first clock sequence, a register produces a first data signal representative of beam on and off dots. Controlled by the second clock sequence, another register produces a second data signal representative of beam on and off units. A combined signal of the first and the second data signals represents the beam on and off dots in each beam on unit and controls an acousto-optic modulator unit to direct the laser beam to the object when the combined signal represents the beam on dots. Along a line of scan of the laser beam relative to the object, each beam on or off unit is composed of the beam on and off and the beam off dots, equal in number to the integral multiple. Preferably, a Q switch is controlled by the first clock sequence to direct the laser beam to the acousto-optic modulator unit when the first data signal represents the beam on and off dots in the beam on and off units.

REFERENCES:
patent: 4865683 (1989-09-01), Burns
patent: 4920430 (1990-04-01), Isono et al.
patent: 4970600 (1990-11-01), Garnier et al.

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