| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom optical system where the number of the movable group of lenses is made as small as possible, which is very compact, whose power consumption is extremely low and whose operation noise is low, and to provide an imaging apparatus using the same. SOLUTION: The zoom optical system has at least two lens groups having variable power action or compensating action to compensate the deviation of an image surface associated with the variable power, and movable during variable power, and a shape variable mirror having focusing action. The shape variable mirror is arranged nearer to an image side than the lens group having the variable power action. COPYRIGHT: (C)2003,JPO |
