| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lens barrel with improved optical performance without enlarging an outer diameter of the lens barrel. <P>SOLUTION: The lens barrel includes: a fixed cylinder 14 having a straight groove extending in the direction of an optical axis; a first cam cylinder 15 arranged on the outer diameter side of the fixed cylinder 14 and capable of being rotated around the optical axis; a second cam cylinder 16 arranged on the inner diameter side of the fixed cylinder 14 and capable of being rotated synchronized with the first cam cylinder 15; a third group moving cylinder 18 and a fourth group moving cylinder 21 retained to the second cam cylinder 16 and capable of being moved in the direction of the optical axis; a third group moving cylinder cam follower 19 which is fixed to the third group moving cylinder 18; and a fourth group moving cylinder cam follower 22 which is fixed to the fourth group moving cylinder 21. In this case, the third group moving cylinder cam follower 19 and the fourth group moving cylinder cam follower 22 are engaged with the straight groove provided on the fixed cylinder 14. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
