Optical device for reading and writing data on a recording mediu

Details Optical device for reading and writing data on a recording mediu Optical device for reading and writing data on a recording mediu

1989-12-20

1992-08-04

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4411, 369 32, 369112, G11B 700

Patent

active

051365650

ABSTRACT:
A yoke constituting a magnetic actuator for driving an objective lens has a plurality of arms arranged in a plane intersecting the optical axis of the lens perpendicular thereto. An optical system including the objective lens is disposed at one side of the yoke and has the outer peripheral portion of the lens positioned partly in the space between adjacent two arms. The lateral width of the device is decreased by an amount corresponding to the lap of the lens over the yoke. A cover plate is secured to the upper surface of the magnetic actuator in intimate contact with the upper end faces of the yoke arms to give enhanced rigidity to the device.

REFERENCES:
patent: 4727529 (1988-02-01), Araki et al.
patent: 4745589 (1988-05-01), Nomura
patent: 4818066 (1989-04-01), Nose
patent: 4912693 (1990-03-01), Goda
patent: 4969715 (1990-11-01), Nishihara et al.
patent: 4991161 (1991-02-01), Ikegame et al.
patent: 5005162 (1991-04-01), Mitsumori et al.
patent: 5022022 (1991-06-01), Kikuchi et al.

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