| 发明名称 |
Dynamic focus adjustment for transmissive or reflective optical disc memory systems |
| 摘要 |
An optical disc reader is provided in which automatic focussing is achieved by movements of elements completely removed from the moving head which travels across the optical disc.
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| 申请公布号 |
US4322838(A) |
申请公布日期 |
1982.03.30 |
| 申请号 |
US19800120589 |
申请日期 |
1980.02.11 |
| 申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
NEUMANN, HANS D. |
| 分类号 |
G02B7/28;G11B7/08;G11B7/09;(IPC1-7):G11B7/00 |
主分类号 |
G02B7/28 |
| 代理机构 |
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代理人 |
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