In order to make focal positions of laser beams having different wavelength bands coincide with one another, a laser output device that oscillates laser beams having plural wavelength bands, a spectrometer (16B) that respectively disperses the laser beams of the respective wavelength bands, and condensers (16C and 16C) that respectively condense the laser beams dispersed by the spectrometer (16B) independently and match focal points thereof to the same position, are included.
