| 发明名称 |
Optical pickup |
| 摘要 |
An optical pickup wherein a semiconductor laser device for projecting a laser beam onto an optical disc is driven by a D.C. current and a high-frequency current superposed thereon, and the laser device oscillates in a multiple longitudinal mode.
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| 申请公布号 |
US4480325(A) |
申请公布日期 |
1984.10.30 |
| 申请号 |
US19830472220 |
申请日期 |
1983.03.04 |
| 申请人 |
HITACHI, LTD. |
发明人 |
AIKI, KUNIO;OJIMA, MASAHIRO |
| 分类号 |
G11B7/095;G11B7/12;G11B7/13;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/095 |
| 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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