| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens which is suitable for, especially, a zoom lens for a compact/high performance digital camera, and can achieve high resolution responding to a variable power ratio of five or more times. SOLUTION: The zoom lens comprises, in the order from the object side along the optical axis: a first lens group I with positive refractive power; a second lens group II with negative refractive power; a third lens group III with positive refractive power; a fourth lens group IV with negative refractive power; a fifth lens group V with positive refractive power; and a sixth lens group VI with positive or negative refractive power. When zooming from the wide angle end to the telephoto end, at least the second lens group II, the fourth lens group IV and the fifth lens group V are moved while the first lens group I is fixed. The first lens group I includes a reflecting optical element for bending an optical path, and the incoming surface or outgoing surface of the reflecting optical element have a curvature radius. COPYRIGHT: (C)2009,JPO&INPIT |
