Optical element drive apparatus

Details Optical element drive apparatus Optical element drive apparatus

1991-10-04

1993-11-30

Nelms, David C.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

360106, G11B 1730

Patent

active

052672298

ABSTRACT:
An optical element drive apparatus includes an objective lens for applying a light beam spot to a recording surface of an optical disc and a holder for holding the objective lens. The objective lens is supported to be movable in the focusing direction and the tracking direction by a carriage through the holder. The objective lens is moved by first drive mechanism including focusing and tracking coils and a magnetic circuit magnetically acting on the coils. The magnetic circuit is partly constituted by the carriage. The carriage is supported by a support mechanism and moved in the tracking direction by second drive mechanism.

REFERENCES:
patent: 5043972 (1991-08-01), Kurihara et al.
patent: 5138605 (1992-08-01), Shtipelman et al.

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