发明名称 |
Zoom lens having high zoom ratio including wide angle range |
摘要 |
A compact zoom lens having a high zoom ratio including a wide angle range is composed of a first positive lens group, a second negative lens group and a positive third lens group arranged in that order from the object side of the lens. The first and third lens groups are integrally movable toward the object from the wide angle end to the telephoto end of the lens system. The second lens group is movable independently of the first and third lens groups.
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申请公布号 |
US4348082(A) |
申请公布日期 |
1982.09.07 |
申请号 |
US19800149410 |
申请日期 |
1980.05.13 |
申请人 |
ASAHI KOGALU KOGYO KABUSHIKI KAISHA |
发明人 |
OGAWA, RYOTA |
分类号 |
G02B13/04;G02B15/14;G02B15/173;G02B15/20;G02B15/22;(IPC1-7):G02B15/14 |
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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