发明名称 |
OPTICAL PICKUP AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL DISC |
摘要 |
An optical pickup which can be used for the record and/or reproduction for at least two different types of optical discs. The optical pickup device has a first objective lens, a second objective lens which has a numerical aperture different from the numerical aperture of the first objective lens, a bobbin to which the first and second objective lenses are attached and a driving mechanism by which the bobbin is transferred in a first direction parallel with the optical axis of the first and second objective lenses and in a second direction perpendicular to the optical axis of the first and second objective lenses. By using the first and second objective lenses selectively, data are recorded and/or reproduced on and/or from at least two different types of optical discs.
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申请公布号 |
WO9802874(A1) |
申请公布日期 |
1998.01.22 |
申请号 |
WO1997JP02490 |
申请日期 |
1997.07.17 |
申请人 |
SONY CORPORATION;TSUKAHARA, NOBUHIKO;TAKAHASHI, KATSUYA |
发明人 |
TSUKAHARA, NOBUHIKO;TAKAHASHI, KATSUYA |
分类号 |
G11B7/00;G11B7/09;G11B7/135;(IPC1-7):G11B7/09;G11B7/085 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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