| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser machining head capable of improving workability and thermal efficiency by expanding a machining area in the Y direction at the machining position T and thereby reducing the number of frequency of scanning for machining. SOLUTION: In the laser machining head in which a linear laser beam 1 is formed by converging a rectangular or rectangularly shaped laser beam 1 in X direction with a two-dimensional convex cylindrical lens 3, diffusing the converged beam 1 in Y direction with a two-dimensional concave cylindrical lens 4, and converging the diffused beam 1 in X, Y directions with three- dimensional convex cylindrical lens 5, two mirrors 8 with the reflection surfaces faced to each other are arranged apart in Y direction between the two-dimensional concave cylindrical lens 4 and the three-dimensional convex cylindrical lens 5, so that a part of the laser beam diffused in Y direction is reflected to the machining position T between the mirrors 8.</p> |
