| Original document(19 pages) 中文版 |
The zoom lens includes in order from the object side: a first lens group 10 having a positive refracting power and including a right-angle prism G2 that bends an optical path substantially 90[deg.]; a second lens group 20 having a negative refracting power; a third lens group 30 having a positive refracting power and including a diaphragm St on the side closest to an image face; and a fourth lens group 40 having a positive refracting power. The fourth lens group 40 comprises cemented lenses G9 and G10 having a negative refracting power and a positive meniscus lens G11 in which at least one face is aspherical and a convex face faces the object side. In addition, the zoom lens satisfies the following expressions: (1) -0.45
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Application Number
申请号 |
200610071746 |
Application Date
申请日 |
2006.03.24 |
| Title 名称 |
Zoom lens
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Publication Number
公开号 |
1837887 |
Publication Date
公开日 |
2006.09.27 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
G02B9/34,G02B13/18,G02B1/04 |
Applicant(s) Name
申请人 |
Fujinon Corp. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
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| Attorney & Agent 代理人 |
li xianglan |
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