Laser processing method

Details Laser processing method Laser processing method

1995-12-21

1997-09-23

Hellner, Mark

Electric heating

Metal heating

By arc

21912164, 21912172, B23K 2606

Patent

active

056700695

ABSTRACT:
A laser processing method is carried out by a laser apparatus comprising: an oscillator; a spatial filter comprising a first convex lens, a member having a pinhole portion, and a second convex lens on an optical axis of the laser beam from an oscillator; two galvano-mirrors; and an f.theta. lens. The method includes: emitting a laser beam from the oscillator, focusing the laser beam by the first convex lens, removing non-focusing components in a peripheral portion of a focusing spot performed by the first convex lens by passing the laser beam which has passed through the first convex lens through the pinhole portion, a focal distance of the first convex lens being set so that a focusing diameter of the laser beam at the pinhole portion of the member is equal to or smaller than a focusing diameter of the laser beam which has passed through the f.theta. lens, restoring the laser beam which has passed through the pinhole portion into a parallel laser beam by the second convex lens, scanning the laser beam which has passed through the second convex lens by means of the two galvano-mirrors, and focusing the scanned laser beam by means of the f.theta. lens on a work to execute processing of the work.

REFERENCES:
patent: 4689482 (1987-08-01), Horikawa et al.
patent: 5055653 (1991-10-01), Funami et al.
patent: 5237149 (1993-08-01), Macken
patent: 5248878 (1993-09-01), Ihara

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