Stabilized optical pick-up device inhibiting the effect of the f

Details Stabilized optical pick-up device inhibiting the effect of the f Stabilized optical pick-up device inhibiting the effect of the f

1988-07-08

1991-01-01

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4426, 369 4433, 369 4435, G11B 700

Patent

active

049823922

ABSTRACT:
An optical pick-up device for use in an optical information recording/reproducing apparatus carries out a focusing and tracking control operation to keep the optical pick-up device located in a desired location relative to an associated optical disc. In accordance with the present invention, the focusing or tracking control operation is temporarily inhibited for a predetermined time period immediately after the initiation of recording of data to the optical disc and immediately after the termination of recording of data to the optical disc if a focusing or tracking error signal has been detected to exceed a predetermined range.

REFERENCES:
patent: 4535431 (1985-08-01), Bricot et al.
patent: 4669072 (1987-05-01), Miura et al.
patent: 4669077 (1987-05-01), Gerard et al.
patent: 4700334 (1987-10-01), Shinkai
patent: 4730294 (1988-03-01), Funada
patent: 4748610 (1988-05-01), Nakata et al.

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