发明名称 |
Optical zoom lens of the retrofocus type having three lens groups |
摘要 |
<p>Provided is a microminiaturized zoom optical system capable of sufficiently correcting aberration. The zoom optical system (100) includes a first lens group (101) having a negative optical power, a second lens group (102) having a positive optical power, and a third lens group (103) having a positive or negative optical power in this order from the object side. The zoom optical system is configured in such a manner that the interval between the first lens group (101) and the second lens group (102) is decreased in zooming from the wide angle end to the telephoto end. A positive lens element in the third lens group (103) or in a lens group closer to the image side than the third lens group (103) satisfies the following conditional expression: ½p < 40
where vp is the minimum value of the Abbe number of the positive lens element.</p> |
申请公布号 |
EP1881356(A1) |
申请公布日期 |
2008.01.23 |
申请号 |
EP20060732020 |
申请日期 |
2006.04.18 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
MATSUSAKA, KEIJI;OHZAWA, SOH |
分类号 |
G02B15/177 |
主分类号 |
G02B15/177 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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