Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2006-06-06
2006-06-06
Korzuch, William (Department: 2652)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S044370, C369S047170
Reexamination Certificate
active
07057994
ABSTRACT:
When information is reproduced in an optical disk of high recording density or of low recording density, a main beam and sub-beams are emitted onto adjacent tracks. The main beam has a shape longer in a direction perpendicular to the tracks. When the optical disk of high recording density is reproduced, cross talk components from adjacent tracks included in signals reproduced from reflection light of the main beam are canceled by using signals reproduced from reflection lights of the sub-beams. When the optical disk of low recording density is reproduced, information is reproduced with a beam. Thus, two types of optical disks can be reproduced with a simple structure in a compatible way. In the cross talk canceling, discrimination marks formed along the tracks at constant distances are reproduced, and a time difference between the main beam and the sub-beams is corrected precisely by using track jump and detection of discrimination marks.
REFERENCES:
patent: 5235583 (1993-08-01), Jongenelis et al.
patent: 5410531 (1995-04-01), Tsujioka
patent: 5544141 (1996-08-01), Kawasaki
patent: 5708636 (1998-01-01), Takahashi et al.
patent: 5729514 (1998-03-01), Horigome et al.
patent: 5802029 (1998-09-01), Zucker
patent: 5946285 (1999-08-01), Nakane et al.
patent: 6052344 (2000-04-01), Ueki
patent: 6055076 (2000-04-01), Takahashi et al.
patent: 6614720 (2003-09-01), Ogata et al.
patent: 7-176052 (1995-07-01), None
patent: 8-102079 (1996-04-01), None
patent: 9-185833 (1997-07-01), None
Ishibashi Hiromichi
Kasazumi Ken'ichi
Battaglia Michael V.
Korzuch William
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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