Information recording and reproducing apparatus with offset comp

Details Information recording and reproducing apparatus with offset comp Information recording and reproducing apparatus with offset comp

1996-01-24

1998-08-18

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4435, 369 4434, G11B 709

Patent

active

057966877

ABSTRACT:
In an optical information recording/reproducing apparatus provided with an actuator for integrally moving a mirror and an objective lens in the focusing direction, there are provided a device for receiving a light beam reflected by an information medium thereby detecting a tracking error signal indicating deviation of the light beam from an information track, a device for measuring an offset value utilizing the tracking error signal, and a device for correcting the offset contained in the tracking error signal. The offset correcting device corrects the offset at the tracking servo operation, based on the offset value measured by the offset measuring device.

REFERENCES:
patent: 4972395 (1990-11-01), Baba
patent: 5048002 (1991-09-01), Horie et al.
patent: 5251194 (1993-10-01), Yoshimoto et al.
patent: 5260923 (1993-11-01), Baba
patent: 5347503 (1994-09-01), Koyama et al.
patent: 5351224 (1994-09-01), Nagata et al.
patent: 5404346 (1995-04-01), Koyama et al.

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