Patent ID: 8872067

Claim:
A laser beam working machine comprising: a laser light source for emitting a laser beam; a support table for supporting a work; a first optical system, having a function to diverge or converge parallel light in a predetermined direction orthogonal to an optical axis, for diverging or converging the laser beam emitted from the laser light source in the predetermined direction; a second optical system, having a function to converge parallel light into one point on the optical axis, for converging the laser beam emitted from the first optical system into a first point in a first direction orthogonal to the optical axis and a second point in a second direction orthogonal to the optical axis and first direction; an adjustment mechanism for adjusting a divergence or convergence angle of the laser beam incident on the second optical system at least in the first direction; and a moving mechanism for moving the support table relative to the second optical system along the optical axis such that at least the second point is located on an outer surface of the work or therewithin, wherein a cross section of the laser beam at the first point becomes an elongated form in the second direction, and a cross section of the laser beam at the second point becomes an elongated form in the first direction.