Method for inspecting an optical disc

Details Method for inspecting an optical disc Method for inspecting an optical disc

1994-10-28

1995-12-12

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369 4432, G11B 700

Patent

active

054756677

ABSTRACT:
An optical pickup for emitting a laser beam is provided for reading data recorded on an optical disc. The axis of the laser beam is tilted at a skew angle from a perpendicular line to the surface of the disc. Error rate in reproduced data read out by the pickup is determined, and an inferior disc having a rare error rate is eliminated.

REFERENCES:
patent: 4634853 (1987-01-01), Kanamaru
patent: 4780865 (1988-10-01), Yamakawa
patent: 5151890 (1992-09-01), Yonekubo
patent: 5386404 (1995-01-01), Koyama
patent: 5420840 (1995-05-01), Bec

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