| 发明名称 |
MODIFIED TRIPLETS WITH REDUCED SECONDARY SPECTRUM |
| 摘要 |
A printer lens consists of a middle negative biconcave component surrounded by two positive doublets, with the lens parameters being selected to reduce secondary spectrum.
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| 申请公布号 |
US3692386(A) |
申请公布日期 |
1972.09.19 |
| 申请号 |
USD3692386 |
申请日期 |
1971.10.01 |
| 申请人 |
EASTMAN KODAK CO. |
发明人 |
CHARLES J. MELECH |
| 分类号 |
G02B9/12;(IPC1-7):G02B9/26 |
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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