Optical information recording and reproducing apparatus with tra

Details Optical information recording and reproducing apparatus with tra Optical information recording and reproducing apparatus with tra

1985-10-21

1988-02-16

McElheny, Jr., Donald

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

G11B 700

Patent

active

047260041

ABSTRACT:
An optical information recording and reproducing apparatus for irradiating a disk-shaped recording medium having spiral tracks with a light beam so that the information recorded along the tracks may be reproduced. The apparatus is equipped with a circuit for detecting the displacement of the light beam from said tracks and a clipping circuit for clipping a tracking error signal or the output signal of said detecting circuit with a predetermined threshold value. The light beam has its position corrected along the tracks in accordance with the output signal of said clipping circuit so that it may be prevented from tracking erratically.

REFERENCES:
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4539664 (1985-09-01), Deguchi et al.
patent: 4567534 (1986-01-01), Groen et al.
patent: 4583209 (1986-04-01), Bierhoff

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