| 摘要 |
<P>PROBLEM TO BE SOLVED: To construct an adjustment system for quicker adjustment and of high stability and smoothness, which achieves the reduction of costs including both component costs and manufacturing costs and contributes to the reduction in size and weight of an entire device. <P>SOLUTION: A lens group Lf is divided to a front lens portion Lfa and a rear lens portion Lfb located at least in a longitudinal direction, and the front lens portion Lfa and the rear lens portion Lfb are supported so as to be displaceable independently respectively. A focus adjustment mechanism Mf is provided which simultaneously displaces the front lend portion Lfa and the rear lens portion Lfb in a longitudinal direction Fs by operation of a focus adjustment operation part 2 to perform focus adjustment, and an image surface adjustment mechanism Mi is provided which displaces one of the front lens portion Lfa and the rear lens portion Lfb in the longitudinal direction Fs in accordance with the operation of the focus adjustment operation part 2 to perform image surface adjustment. <P>COPYRIGHT: (C)2013,JPO&INPIT |
