Method and apparatus for marking patterns by a scanning laser be

Details Method and apparatus for marking patterns by a scanning laser be Method and apparatus for marking patterns by a scanning laser be

1995-11-28

2000-08-01

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347241, G02B 2700

Patent

active

060974206

ABSTRACT:
Energy distribution at a section of a laser beam is leveled by causing the laser beam, emitted by a continuous wave Q-switch pulse from a laser oscillator having an acousto-optic Q-switch element, to pass through a mask having a mask pattern. The laser beam having passed the mask is reflected by a pair of reflection mirrors provided on a pair of galvanometers. The reflected laser beam passes through an objective lens and is focused on a processing object. A desired character or sign is marked on the processing object through a scanning with the laser beam focused on the processing object by driving a pair of galvanometers.

REFERENCES:
patent: 3947093 (1976-03-01), Goshima et al.
patent: 5053171 (1991-10-01), Portney et al.
patent: 5389954 (1995-02-01), Inaba et al.
patent: 5521628 (1996-05-01), Montgomery
S. K. Dew et al.; "Absorbing filter to flatten Gaussian beams"; Applied Optics, vol. 31, No. 18, Jun. 20, 1992; pp. 3416-3419.

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