Objective lens driving device

Details Objective lens driving device Objective lens driving device

1995-11-14

1997-08-12

Ben, Loha

Optical: systems and elements

Lens

With support

359814, 369 4415, 310 27, 310 36, 360106, G02B 702

Patent

active

056571720

ABSTRACT:
An objective lens driving device used in an optical recording and/or reproduction apparatus comprises a lens holder, elastic supporting members, a coil bobbin and a yoke. An objective lens is mounted in the lens holder. The elastic supporting members have one end attached to the lens holder and the other end attached to a mounting part. The elastic supporting members support the lens holder movably in a direction parallel to the optical axis of the objective lens and in a plane perpendicular to the optical axis. A coil for focusing and coils for tracking are wound on the coil bobbin. A magnet is mounted on the yoke, and the width of this magnet is selected so that flux from the magnet acts only on effective portions of the coils for tracking.

REFERENCES:
patent: 4835643 (1989-05-01), Schulze
patent: 5018836 (1991-05-01), Noda et al.
patent: 5046820 (1991-09-01), Saekusa et al.
patent: 5119253 (1992-06-01), Kotani
patent: 5313334 (1994-05-01), Tomiyama et al.
patent: 5521762 (1996-05-01), Tomiyama et al.

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