发明名称 |
VARIABLE-POWER OPTICAL SYSTEM, IMAGE PICKUP DEVICE, AND DIGITAL APPARATUS |
摘要 |
A variable-power optical system includes, in order from an object side thereof: a first lens group with a negative optical power; a second lens group with a positive optical power; a third lens group with a negative optical power; and a fourth lens group with a positive optical power. An interval between the first lens group and the second lens group decreases when a power of the variable-power optical system varies from a wide-angle end to a telephoto end. The second lens group includes at least one aspheric surface. The variable-power optical system satisfies the predetermined conditional expressions.
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申请公布号 |
US2010045808(A1) |
申请公布日期 |
2010.02.25 |
申请号 |
US20070519211 |
申请日期 |
2007.11.27 |
申请人 |
KONICA MINOLTA OPTO, INC |
发明人 |
MATSUSAKA KEIJI;OHZAWA SOH;FUKUTA YASUNARI |
分类号 |
H04N5/225;G02B15/14 |
主分类号 |
H04N5/225 |
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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