| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a welding head which is easily installable on a laser beam machine and is small-sized in order to downsize over the entire part of the laser machine. SOLUTION: The welding head 1 having an optical transmission fiber 3 for welding, a beam-condensing optical system, an imaging device 6, an illumination optical transmission fiber 5 and an imagery optical system has a branching mirror 98a for branching the optical path for light for welding and light for observation and an imagery optical system induction mirror 98b. The optical path of the light for welding has a first optical path from a light exit port for welding to the branching mirror and a second optical path from the branching mirror to a welding area and the optical path for observation has a third optical path from the welding area to the imagery optical system induction mirror and a fourth optical path from the imagery optical system induction mirror to the imaging device. The second optical path and the third optical path are at least partly parallel and the first optical path and the fourth optical path are positioned in parallel.</p> |
