Method and apparatus for testing quality of an optical disk medi

Details Method and apparatus for testing quality of an optical disk medi Method and apparatus for testing quality of an optical disk medi

1998-07-17

2000-05-02

Edun, Muhammad

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369 47, 369 59, G11B 702

Patent

active

060580860

ABSTRACT:
The method and apparatus for testing the quality of an optical disk medium moves an optical disk into a testing position (e.g. disposes the optical disk in a disk drive), and records test data in the outer area of an optical disk. This outer area of the optical disk is not used when manufacturing a prerecorded disk, and is also not used by users of write-once optical disks. The quality of the optical disk is judged based on the test signal produced from reproducing the test data in the outer area of the optical disk. Based on the judged quality, the optical disk is classified for further processing.

REFERENCES:
patent: 5256965 (1993-10-01), Nomura
patent: 5502702 (1996-03-01), Nakajo
patent: 5530687 (1996-06-01), Yamaguchi
patent: 5559785 (1996-09-01), Honda et al.
patent: 5821004 (1998-10-01), Hino et al.
patent: 5872763 (1999-02-01), Osakabe

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