| 发明名称 |
f- theta Lens system |
| 摘要 |
An f- theta lens system comprising the first lens element which is a positive lens, the second lens element which is a negative lens and the third lens element which is a positive lens. This lens system can be formed as a small lens of a wide angle and has a focusing ability close to the diffraction limit.
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| 申请公布号 |
US4401362(A) |
申请公布日期 |
1983.08.30 |
| 申请号 |
US19810282948 |
申请日期 |
1981.07.13 |
| 申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
MAEDA, HARUO |
| 分类号 |
G02B9/12;G02B9/16;G02B13/00;G02B13/22;G02B13/24;G02B26/12;G02B27/00;(IPC1-7):G02B9/14;G02B27/17 |
主分类号 |
G02B9/12 |
| 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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