| 摘要 |
PURPOSE:To improve the positioning accuracy of an optical axis without causing a large increase of a cost, also without deteriorating the workability and the assembling property, and without increasing greatly the weight of a movable part, by providing a guide shaft part having a center axis being eccentric from a center axis of a lens barrel, on the end part of the lens barrel. CONSTITUTION:The titled lens body is provided with a guide shaft part 3 having a center axis being eccentric from a center axis of a lens barrel 2. First of all, the guide shaft part 3 is inserted to be fitted to a reference hole 5b. Subsequently, the lens barrel part 2 is rotated centering around the reference hole 5b. In this case, the center axes of the lens barrel part 2 and the guide shaft 3 are eccentric from each other, therefore, by this rotational motion, a position where a gap between a fitting hole 5a and the lens barrel part 2 becomes almost '0' exists. In this position, the optical axis is positioned by fixing a lens 4 to a positioning reference part 5 by means of adhesion, etc. |
