Laser beam machining apparatus

Details Laser beam machining apparatus Laser beam machining apparatus

2008-04-28

2011-11-01

Heinrich, Samuel M (Department: 3742)

Electric heating

Metal heating

By arc

C219S121730, C219S121740, C219S121750

Reexamination Certificate

active

08049133

ABSTRACT:
A laser beam machining apparatus including a laser beam irradiation unit, the laser beam irradiation unit including: a laser beam oscillator for oscillating a laser beam; a beam splitter by which the laser beam oscillated by the laser beam oscillator is split into a first laser beam and a second laser beam; a rotary half-wave plate disposed between the laser beam oscillator and the beam splitter; a condenser lens disposed in a first optical path for guiding the first laser beam split by the beam splitter; a first reflecting mirror disposed in a second optical path for guiding the second laser beam split by the beam splitter; a first quarter-wave plate disposed between the beam splitter and the first reflecting mirror; a second reflecting mirror disposed in a third optical path for splitting thereinto the second laser beam returned to the beam splitter through the second optical path; a second quarter-wave plate disposed between the beam splitter and the second reflecting mirror; and a cylindrical lens disposed between the beam splitter and the second quarter-wave plate.

REFERENCES:
patent: 4329056 (1982-05-01), Lacombat et al.
patent: 4985898 (1991-01-01), Furuya et al.
patent: 2005/0279736 (2005-12-01), Bruland et al.
patent: A 2004-9139 (2004-01-01), None
patent: A 2007-136477 (2007-06-01), None

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