Actuator having a plurality of objective lenses installed in...

Details Actuator having a plurality of objective lenses installed in... Actuator having a plurality of objective lenses installed in...

2005-05-17

2005-05-17

Watko, Julie Anne (Department: 2653)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Having power driven optical transducer assembly

Reexamination Certificate

active

06895593

ABSTRACT:
An actuator for an optical pickup having a base on which a holder is fixed, a bobbin, a support member, and a magnetic circuit. A plurality of installation holes are formed in the bobbin such that a plurality of objective lenses to record and/or reproduce optical discs having different recording densities are installed at different heights. The support member has one end coupled to the bobbin and the other end coupled to the holder movably supports the bobbin. The magnetic circuit drives the bobbin in focusing and tracking directions. The magnetic circuit is divided into a first magnetic circuit to drive the objective lenses in the focusing direction, and a second magnetic circuit to drive the objective lenses in the tracking direction, thereby reducing the weight of a moving portion.

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patent: 2001-23200 (2001-01-01), None
Chinese Office Action dated Apr. 30, 2004 in Chinese Application No. 2131575.2.

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