Optical information recording medium, recording/reproducing...

Details Optical information recording medium, recording/reproducing... Optical information recording medium, recording/reproducing...

2005-08-23

2005-08-23

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S116000, C369S047530

Reexamination Certificate

active

06934243

ABSTRACT:
An optical information recording medium includes: a substantially disk-shaped substrate; and a recording layer formed on a surface of the substrate for recording, reproducing and erasing information by irradiation with a laser beam. A test recording region for test recording and an information recording region for recording the information at least are arranged on the surface of the substrate. In the test recording region and the information recording region arranged on the surface of the substrate, a test recording track and an information recording track respectively are formed in a spiral-shaped arrangement or in a concentric arrangement. A track pitch of the test recording track is wider than a track pitch of the information recording track.

REFERENCES:
patent: 5526341 (1996-06-01), Shiba et al.
patent: 4-19837 (1992-01-01), None

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