Patent ID: 7764432

Claim:
A laser apparatus comprising: a first light source, including a first laser array stack, in which a plurality of first semiconductor laser arrays, each emitting a first laser beam, are laminated; a second light source, including a second laser array stack, in which a plurality of second semiconductor laser arrays, each emitting a second laser beam, are laminated; a beam synthesizer, deflecting at least one of the first and second laser beams and generating a synthesized beam formed of the first and second laser beams; and a converger, converging the synthesized beam; wherein the first laser beams exiting from the beam synthesizer have mutually parallel optical axes and mutually parallel slow axis directions, wherein the second laser beams exiting from the beam synthesizer have optical axes that are mutually parallel and inclined with respect to the optical axes of the first laser beams and slow axes directions that are parallel to the slow axes directions of the first laser beams, the converger converges the first laser beams onto a first convergence position within a plane perpendicular to the slow axis directions and converges the second laser beams onto a second convergence position within the plane perpendicular to the slow axis directions, and the second convergence position is separated from the first convergence position by a predetermined distance along a direction perpendicular to both an optical axis of the converger and the slow axis directions.