Patent ID: 7440199

Claim:
A manufacturing method of an optical component comprising: adjusting an inner lens barrel comprising a threaded portion on its outer surface relative to an outer lens barrel comprising a threaded portion on its inner surface, a junction of said threaded portions forming a joint; and emitting a plurality of laser beams from diagonally above the outer lens barrel to melt and cure at least one surface of said joint, such that the inner lens barrel and the outer lens barrel are fixed by welding, wherein the outer lens barrel comprises: an end face adjacent to and substantially perpendicular to said inner surface, and a plurality of recesses on an upper inner surface, the recesses opening on the end face and on a threaded portion of the inner surface, the lasers pass through said recesses to weld a portion of the outer lens barrel at a bottom of said recesses to a portion of the inner lens barrel adjacent to the bottom of the recesses, and said plurality of laser beams are simultaneously emitted to a plurality of points along said joint.