Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2006-01-24
2006-01-24
Hudspeth, David (Department: 2651)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S044130, C369S047480, C369S124110
Reexamination Certificate
active
06990056
ABSTRACT:
A recordable or rewritable optical disk device capable of reproducing a wobble signal accurately at a high S/N ratio to thereby get address information even at a time of high-speed recording is disclosed. An optical disk is formed with wobbled guide tracks, and the light reflected from the optical disk is picked up by an optical pickup unit, which supplies corresponding electric signal to a wobble signal reproducing section. In the wobble signal reproducing section, at a time of recording, the input signal is sampled not only during a period of reproducing power and also during a period of recording power, and the two sampled signals are added to reproduce a wobble signal. The sampling during the period of recording power may be carried out within a period where the quantity of reflected light is in a stable condition after a pit is formed on the optical disk.
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patent: 6614745 (2003-09-01), Takeda et al.
patent: 6643239 (2003-11-01), Nakajo
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patent: 2001-1134943 (2001-05-01), None
Electronic translation of JP 2001-110056.
Christensen O'Connor Johnson & Kindness PLLC
Giesy Adam R.
Hudspeth David
TEAC Corporation
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