发明名称 |
Zoom lens, camera, and mobile information terminal |
摘要 |
A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side. At least the first group optical system and the third group optical system move so that a distance between the first group optical system and the second group optical system becomes minimum at short focal-length side, and a distance between the second group optical system and the third group optical system becomes minimum at long focal-length side. The third group optical system includes a triplet lens formed with a negative lens, a positive lens, and a negative lens.
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申请公布号 |
US2005195493(A1) |
申请公布日期 |
2005.09.08 |
申请号 |
US20050117398 |
申请日期 |
2005.04.29 |
申请人 |
NISHINA KIICHIRO;TATSUNO HIBIKI;ONO NOBUAKI |
发明人 |
NISHINA KIICHIRO;TATSUNO HIBIKI;ONO NOBUAKI |
分类号 |
G02B15/173;(IPC1-7):G02B15/14 |
主分类号 |
G02B15/173 |
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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