| 摘要 |
A lens fixing structure obviates the need for using a U-shaped lens holder retaining member which is apt to cause incomplete laser welding and which adds to cost. According to the lens fixing structure, a lens is fixed as follows: firstly, only a lens holder is held by a retainer to position it in directions x, y, and z while it is being suspended with respect to a base; secondly, a pair of lens holder retaining members composed of magnet are attracted to the lens holder while they are placed on the base by another retainer or by hands; thirdly, another retainer or other retaining element is removed from the lens holder retaining members; and lastly, the lens holder retaining members and the base are fixed at predetermined points by laser welding and the lens holder retaining members and the lens holder are also fixed at other predetermined points by laser welding.
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