Mechanism to aid optical beam focusing on optical disc

Dynamic optical information storage or retrieval – Optical storage medium structure

Reexamination Certificate

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Reexamination Certificate

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07103896

ABSTRACT:
An optical disc of one embodiment of the invention is disclosed that includes a first surface, a second surface, an optically writable label area, and an optically writable data area. The first and the second surfaces are oppositely situated to one another. The label area is on one of the first and the second surfaces. The data area is on one of the first and the second surfaces. The mechanism aids proper focusing of an optical beam of an optical disc device on the optically writable label area and on the optically writable data area.

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US Patent Application by HP Company; “Integrated CD/DVD Recording And Labeling” HP PD No. 10011728; 86 pages; Filed with USPTO Oct. 11, 2001; U.S. Appl. No. 09/976,877.
PHILIPS press release, Oct. 3, 2003 (p. 2).

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