| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To effectively reduce the dimension of a lens barrel in a direction along an optical axis when the lens barrel is collapsed and housed, with simple constitution, without increasing the dimension of the lens barrel in the radial direction. <P>SOLUTION: An optical filter 5 is arranged between a fourth group lens system 4 and an image sensor 6, the fourth group lens system 4 is held by a retreat lens moving member 41, and the optical filter 5 is held by a filter retreating member 51. When housing operation is started from a photographing state, the retreat lens moving member 41 retreats on an optical axis and is nearly overlapped on the filter retreating member 51, and an engaging coupling part of the retreat lens moving member 41 is engaged with the filter retreating member 51. When the retreat lens moving member 41 rotates and retreats by the housing operation, the filter retreating member 51 engaged with the engaging coupling part is also operated to rotate integrally with the retreat lens moving member 41, and made to retreat to the outside from an inside diameter of the lens barrel. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
