Driving device for objective lens of optical pickup

Details Driving device for objective lens of optical pickup Driving device for objective lens of optical pickup

2008-01-29

2008-01-29

Cao, Allen (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

07325243

ABSTRACT:
The present invention discloses an electromagnetic driving device for an object lens of an optical pickup. The electromagnetic driving device comprises an object lens, a lens bearing seat, a focusing coil, a tracking coil, an auxiliary magnetic device, a base, a plurality of elastomers, and a top cover. The object lens, focusing coil, and tracking coil are fixed to the lens-bearing seat. The auxiliary magnetic device comprises a plurality of magnets fixed to the base. Each of the elastomers is attached to the lens-bearing seat and has an end fixed to the base. By utilizing electromagnetic forces generated by the coils and the auxiliary magnetic device, the object lens is moved to correct tracking deviations and focusing aberrations. The present invention enhances a utilization of the coils, which in turn improves a response time, and sensitivity of the electromagnetic driving device so that the optical pickup can be used in a high-speed optical recording device.

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patent: 7046590 (2006-05-01), Ikeda et al.
patent: 2003/0234457 (2003-12-01), Ijima et al.

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