Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Transducer carriage or actuator
Reexamination Certificate
2011-01-11
2011-01-11
Castro, Angel A. (Department: 2627)
Dynamic optical information storage or retrieval
Dynamic mechanism optical subsystem
Transducer carriage or actuator
Reexamination Certificate
active
07870572
ABSTRACT:
An object lens driving apparatus (100) includes a lens holder (4) that holds an object lens (1) facing a recording medium and is so supported that the lens holder (4) is movable toward and away from the surface of the recording medium. A focusing coil (5) is fixed in the interior of the lens holder (4) so that the focusing coil (5) surrounds an optical axis of the object lens (1). By apply current to the focusing coil (5), a driving force is generated, which moves the lens holder (4) toward and away from the surface of the recording medium. By disposing the focusing coil (5) in the interior of the lens holder (4) so that the focusing coil (5) surrounds the optical axis of the object lens (1), a movable part of the object lens driving apparatus (100) can be reduced in size and weight, so that a high sensitivity can be accomplished.
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Nakamura Keiji
Yabe Mitoru
Birch, Stewart, Kolasch and Birch LLP
Castro Angel A.
Mitsubishi Electric Corporation
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