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1. (WO1998002874) OPTICAL PICKUP AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL DISC
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/002874 International Application No.: PCT/JP1997/002490
Publication Date: 22.01.1998 International Filing Date: 17.07.1997
IPC:
G11B 7/00 (2006.01) ,G11B 7/09 (2006.01) ,G11B 7/135 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
08
Disposition or mounting of heads or light sources relatively to record carriers
09
with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12
Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135
Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
Applicants: TSUKAHARA, Nobuhiko[JP/JP]; JP (UsOnly)
TAKAHASHI, Katsuya[JP/JP]; JP (UsOnly)
SONY CORPORATION[JP/JP]; 7-35, Kitashinagawa 6-chome Shinagawa-ku Tokyo 141, JP (AllExceptUS)
Inventors: TSUKAHARA, Nobuhiko; JP
TAKAHASHI, Katsuya; JP
Agent: KOIKE, Akira ; No.11 Mori Building 6-4, Toranomon 2-chome Minato-ku Tokyo 105, JP
Priority Data:
8/18777217.07.1996JP
8/18777317.07.1996JP
Title (EN) OPTICAL PICKUP AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL DISC
(FR) DISPOSITIF DE CAPTAGE OPTIQUE ET D'ENREGISTREMENT ET/OU DE REPRODUCTION POUR DISQUE OPTIQUE
Abstract:
(EN) 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.
(FR) Dispositif de captage optique qui peut être utilisé pour l'enregistrement et/ou la reproduction d'au moins deux différents types de disques optiques. Ce dispositif de captage optique comprend une première lentille d'objectif, une seconde lentille d'objectif dont l'ouverture numérique est différente de celle de la première, une bobine à laquelle sont fixées les première et seconde lentilles, et un mécanisme d'entraînement au moyen duquel la bobine est transférée dans une première direction parallèle à l'axe optique des deux lentilles et une seconde direction perpendiculaire à cet axe optique. L'utilisation sélective des première et seconde lentilles d'objectif permet d'enregistrer des données sur au moins deux types différents de disques optiques et/ou de reproduire des données à partir d'au moins deux types différents de disques optiques.
Designated States: CN, JP, KR, US
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)