Laser beam processing machine employing two beam spots...

Details Laser beam processing machine employing two beam spots... Laser beam processing machine employing two beam spots...

2008-04-08

2008-04-08

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S548000

Reexamination Certificate

active

07355157

ABSTRACT:
Disclosed herein is a beam processing machine comprising laser beam application device for applying a laser beam to a workpiece, which device includes a laser beam oscillator and a condenser for converging a laser beam to apply the converged laser beam. The condenser includes a first prism for splitting the laser beam oscillated from the laser beam oscillator into a first laser beam and a second laser beam both having a semicircular section and interchanging the first laser beam with the second laser beam, a second prism for correcting the optical paths of the first laser beam and the second laser beam split by the first prism to become parallel to each other, and an image forming lens for focusing the first laser beam and the second laser beam whose optical paths have been corrected by the second prism to become parallel to each other into spots having linear portions on the outer side and arcuate portions on the inner side. The image forming lens partially overlaps the arcuate portions of the spots of the first laser beam and the second laser beam with each other to form a rectangular spot.

REFERENCES:
patent: 5662410 (1997-09-01), Suganuma
patent: 6580054 (2003-06-01), Liu et al.
patent: 6960739 (2005-11-01), Liu et al.
patent: 2003/0226832 (2003-12-01), Liu et al.
patent: 2006/0148210 (2006-07-01), Furuta et al.
patent: 10-305420 (1998-11-01), None
patent: 2004-9139 (2004-01-01), None

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