Information reproduction device

Details Information reproduction device Information reproduction device

2011-03-08

2011-03-08

Chow, Van N (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044360, C369S053140

Reexamination Certificate

active

07903514

ABSTRACT:
An information reproducing apparatus (1) is provided with: a detecting device (11) for irradiating an information. recording medium with laser light (LB) and detecting reflected light as a detection signal, the information recording medium including a first recording layer (L0) and a second recording layer (L1); a high pass filter (14) for performing a filtering process on the detected detection signal; and a reproducing device (15, 16) for performing a reproduction process of the filtered detection signal to reproduce the data, the high pass filter attenuates a fluctuation component of the detection signal, caused by a relative eccentricity between the first recording layer and the second recording layer, by a first attenuation amount (34dB) or more.

REFERENCES:
patent: 6937550 (2005-08-01), Ohsawa
patent: 2004/0170094 (2004-09-01), Takehara
patent: 2006/0239143 (2006-10-01), Yamamoto et al.
patent: 2000-182239 (2000-06-01), None
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patent: 2002-319239 (2002-10-01), None
patent: 2002-329330 (2002-11-01), None
patent: 2002-329331 (2002-11-01), None
patent: 2003-046373 (2003-02-01), None
patent: 2006-302424 (2006-11-01), None

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