Optical disk drive with servo loop for detecting defective disks

Details Optical disk drive with servo loop for detecting defective disks Optical disk drive with servo loop for detecting defective disks

1988-03-25

1990-11-20

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 58, 369111, G11B 7095

Patent

active

049723987

ABSTRACT:
An optical disk recording and reproducing apparatus is provided with an element in a servo system circuit, which element is provided high response characteristics to run out frequency. Output of the element is monitored for detecting whether a disk is defective.

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patent: 4807211 (1989-02-01), Getreuer

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