BEAM SHAPING LENS AND METHOD FOR POSITIONING THE SAME

摘要

PROBLEM TO BE SOLVED: To easily position and to assemble and adjust in a short time. SOLUTION: The beam shaping lens AL has a reference plane on the image side face (back face) and has a projection 25 in part of the reference plane. The beam shaping lens AL is held by a holder with a laser diode LD, and the holder has a recess at the position corresponding to the position of the projection 25. When the beam shaping lens AL is to be held by the holder, the projection 25 of the beam shaping lens AL is inserted into the recess of the holder.