Title:
OPTICAL PICKUP AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL DISC
Document Type and Number:
WIPO Patent Application WO/1998/002874
Kind Code:
A1
Abstract:
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.
More Like This:
| JPH0916994 | OPTICAL PICKUP DEVICE |
| JPS62132243 | OBJECTIVE LENS DRIVING DEVICE |
Inventors:
TSUKAHARA NOBUHIKO (JP)
TAKAHASHI KATSUYA (JP)
TAKAHASHI KATSUYA (JP)
Application Number:
PCT/JP1997/002490
Publication Date:
January 22, 1998
Filing Date:
July 17, 1997
Export Citation:
Assignee:
SONY CORP (JP)
TSUKAHARA NOBUHIKO (JP)
TAKAHASHI KATSUYA (JP)
TSUKAHARA NOBUHIKO (JP)
TAKAHASHI KATSUYA (JP)
International Classes:
G11B7/09; G11B7/1374; G11B7/00; G11B7/135; (IPC1-7): G11B7/09; G11B7/085; G11B7/135
Foreign References:
| JPH08329517A | 1996-12-13 | |||
| JPH09147405A | 1997-06-06 | |||
| JPH08315409A | 1996-11-29 | |||
| JPH08138265A | 1996-05-31 | |||
| JPH0737259A | 1995-02-07 |
Attorney, Agent or Firm:
Koike, Akira (6-4 Toranomon 2-chom, Minato-ku Tokyo 105, JP)
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