Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2008-03-18
2008-03-18
Edun, Muhammad N. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112100, C369S112020, C369S112150, C369S112270, C369S044240
Reexamination Certificate
active
11035042
ABSTRACT:
An optical pickup including an optical member which inhibits interference light reflected from an adjacent layer from being received by a photodetector when an optical information storage medium includes a plurality of recording layers on at least one side thereof. The optical pickup suppresses a photodetector, especially first and second sub-photodetectors of the photodetector, from receiving the interference light reflected from the adjacent layer.
REFERENCES:
patent: 2002/0167886 (2002-11-01), Higashino
patent: 2004/0022152 (2004-02-01), Hayashi
Ahn Young-man
Chung Chong-sam
Heor Tae-youn
Kim Seok-jung
Kim Tae-kyung
Edun Muhammad N.
Stein, McEwen & Bui LLP
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