PURPOSE: To manufacture a metal vapor laser device having fast response and a metal vapor laser device of metal having high melting point, such as iron by altering a method for generating metal vapor of oscillation medium of metal vapor laser from a heater type to a high power laser light irradiation type.
CONSTITUTION: A high power laser device 25 is provided at a position capable of irradiating the metal piece 5 of a metal reservoir 3, and a condensing optical system 27, such as a convex lens for condensing high power laser is provided therebetween. This focal point position is disposed near the surface of the piece 6 to transmit a high power laser light radiated from the device 25 through a metal vapor laser discharge tube wall to condense it in a spot state on the surface of the piece 5, to immediately locally heat and melt the piece 5, thereby generating metal vapor. Since the focal point is displaced by the generation of the metal vapor, the system 27 is moved to alter the focal point position or a scanning device 29 is provided to continuously move the focal point position. The density of the generated metal vapor can be adjusted by altering the intensity of the high power laser light or intermittently irradiating it.
NINOMIYA HIDEKI
YOSHINO SHIGETOSHI
INOUE HIROSHI
MIZUTANI JIYUUE
