| 摘要 |
The present invention relates to a laser optical head. According to the present invention, the laser optical head comprises: a housing (10) into which a laser beam enters; a polygonal mirror (20) to change direction of the entered laser beam; a focusing lens (30) to focus the laser beam whose direction is changed; and a nozzle (40) disposed underneath the housing (10) to pass the laser beam focused by the focusing lens (30) therethrough, spraying gas to prevent a workpiece from oxidizing. The laser optical head in accordance with the present invention prevents the workpiece from oxidizing, improves productivity of laser processing, and improves a degree of freedom of transporting a machine tool. |
