发明名称 |
Zoom lens assembly |
摘要 |
A zoom lens assembly includes, in succession order from the object side, a first fixed lens group of a positive refractive power including a negative lens, a positive lens and a positive meniscus lens; a second movable lens group of a negative refractive power including a negative meniscus lens, a positive lens and a positive lens for effecting a variation of image magnification by moving along an optical axis of the zoom lens assembly; a third fixed lens group of a positive refractive power having at least one aspherical face and including a positive lens and a negative lens; and a fourth movable lens group of a positive refractive power including having at least one aspherical surface and also including negative and positive lenses cemented together.
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申请公布号 |
US5396367(A) |
申请公布日期 |
1995.03.07 |
申请号 |
US19930046714 |
申请日期 |
1993.04.16 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ONO, SHUSUKE;II, HISAYUKI;OKAYAMA, HIROAKI;NAKAJIMA, YASUO |
分类号 |
G02B15/173;(IPC1-7):G02B15/14;G02B13/18 |
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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