Optical information processing apparatus for holding a lens at a

Details Optical information processing apparatus for holding a lens at a Optical information processing apparatus for holding a lens at a

1993-02-01

1994-02-15

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4432, G11B 700

Patent

active

052873390

ABSTRACT:
An optical information processing apparatus for irradiating a focused light beam to an optical recording medium to record and/or reproduce information. The apparatus includes a device for focus-controlling the light beam, a focus pull-in device for switching the focus control device from an inactive state to an active state, a device for moving an irradiation position of the light beam in a surface of the medium to effect tracking control, and a device for holding the light beam at a center of a movable range by the tracking control device, during the focus pull-in.

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patent: 4982394 (1991-01-01), Kanda et al.
patent: 5003524 (1991-03-01), Ikeda

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