发明名称 |
Wide-angle lens system and image-taking device |
摘要 |
A wide-angle lens system has, from the object side thereof: a first lens element having a negative optical power and having a meniscus shape convex to the object side; a second lens element having a biconcave shape; a third lens element having a biconvex shape; and a fourth lens element having a negative optical power and having a meniscus shape convex to the image side. Alternatively, a wide-angle lens system has, from the object side thereof: a first lens element having a negative optical power; a second lens element having a negative optical power; a third lens element having a positive optical power; and a fourth lens element having a positive optical power.
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申请公布号 |
US7375906(B2) |
申请公布日期 |
2008.05.20 |
申请号 |
US20060398947 |
申请日期 |
2006.04.06 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
HIROSE MASATOSHI;ISONO MASASHI |
分类号 |
G02B13/04 |
主分类号 |
G02B13/04 |
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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