发明名称 |
Focusing objective lens system for endoscopes |
摘要 |
An objective lens system for endoscopes comprising a first lens group having positive refractive power, a second lens group having negative refractive power and a third lens group having positive refractive power, and being so adapted as to permit focusing and at the same time observation at a magnification level different from ordinary magnification level matched with distance to an object to be observed.
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申请公布号 |
US4312572(A) |
申请公布日期 |
1982.01.26 |
申请号 |
US19790107639 |
申请日期 |
1979.12.27 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
YAMASHITA, NOBUO;MAEDA, MIWAKO |
分类号 |
A61B1/00;G02B7/10;G02B13/24;G02B15/14;G02B15/173;G02B23/24;G02B23/26;(IPC1-7):G02B9/62 |
主分类号 |
A61B1/00 |
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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