| 发明名称 |
Objective for video disks |
| 摘要 |
An objective for video disks comprising six lens components of single lenses for which the numerical aperture on the recording surface side is large, working distance is large and aberrations especially spherical aberration and coma are corrected favorably.
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| 申请公布号 |
US4073575(A) |
申请公布日期 |
1978.02.14 |
| 申请号 |
US19760685675 |
申请日期 |
1976.05.12 |
| 申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
KOIZUMI, TOSHIMICHI |
| 分类号 |
G02B13/00;G02B13/16;G02B13/24;G02B21/02;(IPC1-7):G02B11/32;G02B11/34 |
主分类号 |
G02B13/00 |
| 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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