| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens barrel capable of stably holding a plurality of plastic lenses by suppressing the influence of the deformation due to changes in temperature. <P>SOLUTION: A lens barrel 1 comprises a first group frame 5 for holding a first group lens 11. The first group lens 11 includes a first lens 21 and a second lens 22 which are made of different plastic materials. The first lens 21 has a first outer peripheral surface 21a and a second outer peripheral surface 21b whose diameter is smaller than that of the first outer peripheral surface 21a, and the first outer peripheral surface 21a is brought into contact with an inner peripheral surface 5b of the first group frame 5 and is held. The second lens 22 is positioned in the radial direction by being fitted in the second outer peripheral surface 21b of the first lens 21 by a running fit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
