Patent ID: 7038860

Claim:
A light source apparatus comprising: a semiconductor laser light source for emitting a laser light; and an optical lens having: a front surface having a first curve for receiving the laser light emitted from the semiconductor laser light source therein; and a back surface having an aspherical second curve and being opposite to the front surface through a lens body, for exiting collimated laser light therefrom based on the laser light received in the optical lens, wherein the optical lens comprises: a pair of surfaces substantially parallel to each other; and a curved face connecting said pair of surfaces to each other, said optical lens yielding a substantially fixed cross section along a surface parallel to said pair of surfaces; the first curve having a principle curvature smaller than that of the second curve and opposing the second curve; said cross section being defined by the second curve, the first curve, and third and fourth lines connecting both ends of the first and second curves to each other, wherein the third and fourth lines comprise curves.