Patent ID: 7315561

Claim:
A laser generator comprising: a laser generating part including a mirror outputting a laser beam, a laser-introducing duct guiding the laser beam output by the laser generating part, a light path duct installed next to the laser-introducing duct and guiding the laser beam, a condensing lens placed at an exit of the light path duct and condensing the laser beam, and at least one of a pair of (a) a first gas introducing part for introducing gas into the laser-introducing duct, and (b) a first flow laminator regulating a first flow of the gas so that the first flow of the gas is a laminar flow on the mirror, or a pair (a) second gas introducing part for introducing the gas into the light path duct, and (b) a second flow laminator regulating a second flow of the gas, so that the second flow of the gas is a laminar flow on the condensing lens.