发明名称 |
Objective lens driving device, data recording device, and data reproducing device, all having driver force selectively rotating and positioning the objective lenses |
摘要 |
An optical disk drive which is a data recording device or a data reproducing device having two movable members. The first movable member has two objective lenses on it. A magnetic circuit is secured to the second movable member to apply a magnetic field to the tracking coil attached to the first movable member. The first and second movable members can rotate around a shaft. The first objective lens or the second objective lens is selected and used in accordance with the type of the disk used. The device can therefore record data on or reproduce data from disk of different types. Further, since the angle at which the second movable member is inclined to the shaft remains unchanged, the device can record data on or reproduce data from a disk, without causing coma-aberration or the like, no matter whether the first object lens or the second objective lens is selected and used.
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申请公布号 |
US5721723(A) |
申请公布日期 |
1998.02.24 |
申请号 |
US19950559370 |
申请日期 |
1995.11.16 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
UCHIMARU, KIYOTAKA;KASAHARA, AKIHIRO;NAGAI, KOICHI;TAKAHASHI, NAOMASA |
分类号 |
G11B7/00;G11B7/09;G11B7/135;G11B19/12;(IPC1-7):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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地址 |
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