| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens system with a long focal length which can optically correct hand shake and reduce the size of the lens including its driving mechanism by reducing the size and the weight of a vibration-proof group for the correction. <P>SOLUTION: A catadioptric lens system includes, in order of light travel: a first lens group that includes a concave mirror and a convex mirror and has a positive refractive power; a second lens group that is more closely positioned to an image side than the concave mirror and has a negative refractive power; and a third lens group that has a positive refractive power. The first lens group has a plurality of lenses closer to the image side than the concave mirror, and some lenses of the lenses are formed as a vibration-proof group so as to be movable in a direction perpendicular to an optical axis. <P>COPYRIGHT: (C)2013,JPO&INPIT |
