| 发明名称 |
Lens system for optical recording type disks |
| 摘要 |
A compact and light-weight lens system for optical recording type disks comprising only one lens element and arranged to have favorably corrected aberrations and a long working distance by forming both surfaces of the lens element as aspherical surfaces.
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| 申请公布号 |
US4571034(A) |
申请公布日期 |
1986.02.18 |
| 申请号 |
US19830515875 |
申请日期 |
1983.07.21 |
| 申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
NAKAMURA, TORU |
| 分类号 |
G02B13/00;G02B13/18;G02B13/24;(IPC1-7):G02B13/08 |
主分类号 |
G02B13/00 |
| 代理机构 |
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