| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens barrel that can be downsized by reducing a space required for positioning a lens frame with a simple structure. <P>SOLUTION: A lens barrel is provided to position an adjustment lens with respect to other lenses in an optical axis direction. The lens barrel includes a lens frame 1 for holding an adjustment lens, and a base frame 2 for adjustably holding the lens frame 1. The lens frame 1 includes a first adjustment step surface 11 and a second adjustment step surface each having a plurality of adjustment surfaces different in height and adjacent to each other in a rotation direction of the lens frame 1. The second adjustment step surface 12 is provided at a phase position rotated by 180 degrees with respect to a position where the first adjustment step surface 11 is provided. The base frame 2 includes holding surfaces each of which is brought into contact with the first adjustment step surface 11 or the second adjustment step surface 12. The adjustment lens includes cutouts, and the holding surfaces are arranged so that at least a part of the holding surfaces overlaps with any of the cutouts provided in the adjustment lens when viewed from the optical axis direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
