| 发明名称 |
THREE-ELEMENT MICROPHOTOGRAPHIC OBJECTIVE LENS |
| 摘要 |
A three-element f/4.5, 19.5x magnification objective lens comprising three airspaced elements from front to rear including a planoconvex lens element, a biconcave lens element and a biconvex lens element.
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| 申请公布号 |
US3640607(A) |
申请公布日期 |
1972.02.08 |
| 申请号 |
USD3640607 |
申请日期 |
1970.11.20 |
| 申请人 |
MINNESOTA MINING AND MFG. CO. |
发明人 |
LAWRENCE H. CONRAD |
| 分类号 |
G02B9/16;(IPC1-7):G02B9/16 |
主分类号 |
G02B9/16 |
| 代理机构 |
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代理人 |
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