Patent ID: 6754246
Filing Date: 2004-06-22
Classification: G02B,H01S

Abstract:
A laser light source apparatus comprising:a semiconductor laser light source having a plurality of semiconductor laser arrays in which a plurality of light-emitting portions for emitting laser beams are arranged along a formation direction of an active layer of a semiconductor laser, the semiconductor laser light source being formed by stacking the plurality of semiconductor laser arrays in a direction perpendicular to the formation direction of the active layer; a plurality of cylindrical lenses provided on respective optical axes of the plurality of semiconductor laser arrays emitted from the light-emitting portions, for collimating respective semiconductor laser beams emitted from the plurality of semiconductor laser arrays in units of a semiconductor laser array; and at least one wedge prism arranged in an optical path of the semiconductor laser beam which has passed through at least one of the plurality of the cylindrical lenses provided at a position shifted from the optical axes of the plurality of semiconductor laser beams, said wedge prism deflecting the optical axis of the semiconductor laser beam which has passed through said at least one of the plurality of the cylindrical lenses to collimate it with another semiconductor laser beam; wherein the wedge prism has a wedge angle made by an incident surface on which the semiconductor laser beam becomes incident and an exit surface from which the semiconductor laser beam that has become incident emerges, and the wedge angle corresponds to the positional shift of the semiconductor laser beam with respect to the optical axes.