Laser beam machining apparatus and method for adjusting the heig

Details Laser beam machining apparatus and method for adjusting the heig Laser beam machining apparatus and method for adjusting the heig

1992-11-12

1994-08-02

Albritton, C. L.

Electric heating

Metal heating

By arc

21912175, 21912182, 21912184, B23K 2602

Patent

active

053348168

ABSTRACT:
In the laser beam machining apparatus, an optical sensor provided with a blue filter detects change of color of light emission from the machining spot on a workpiece irradiated by a machining laser beam from orange color light emission to blue color light emission, when laser beam intensity per area becomes above a certain level as a result of good focusing by a condenser lens; and the position of the condenser lens is controlled based on output of the optical sensor, in a manner that the optical lens lies in such a positional range that the blue color is emitted from machining spot.

REFERENCES:
patent: 4689467 (1987-08-01), Inoue
patent: 4764655 (1988-08-01), Ortiz, Jr. et al.
patent: 5045668 (1991-09-01), Neiheisel et al.
patent: 5061839 (1991-10-01), Matsuno et al.
patent: 5118918 (1992-06-01), Serrano
English Abstract of Inoue Japanese laid open appln. No. 58-183403, Sep. 1983.

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