Patent ID: 6526089
Filing Date: 2003-02-25
Classification: B23K,G02B,H01S

Abstract:
A laser marker comprising:a collimator lens converting laser light emitted from a broad area semiconductor laser into substantially parallel beams of light; a cylindrical concave lens permitting to pass therethrough the laser light having passed through the collimator lens and being perpendicular to a plane of an active layer of the semiconductor laser, the cylindrical concave lens serving as a concave lens for the laser light having passed through the collimator lens and being parallel to the plane of the active layer; a cylindrical convex lens permitting to pass therethrough the laser light having passed through the concave lens and being perpendicular to the plane of the active layer of the semiconductor laser, the cylindrical convex lens serving as a convex lens for the laser light having passed through the collimator lens and being parallel to the plane of the active layer; and a focusing lens focusing the laser light having passed through the cylindrical convex lens.