| abstract |
The present invention provides a laser peening technique capable of performing appropriate laser peening even in a narrow part and shortening the construction time. An output unit 41 that outputs a laser beam 6, a light guide unit 31 that guides the output laser beam 6, a condenser lens 42 that collects the guided laser beam 6, and a focused laser beam. Irradiation nozzle 32 that irradiates light 6, focus changing unit 50 that changes the focal position of laser light 6 based on the distance from irradiation target portion 5 of laser light 6 to irradiation nozzle 32, and irradiation in contact with water A control unit 66 that performs laser peening by irradiating the target unit 5 with the laser beam 6. [Selection] Figure 3 |