Optical recording medium with different wobble...

Details Optical recording medium with different wobble... Optical recording medium with different wobble...

2011-01-25

2011-01-25

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275300, C369S044130, C369S278000, C720S718000

Reexamination Certificate

active

07876668

ABSTRACT:
An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

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