Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-08-23
2011-08-23
Renner, Craig A. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S047500, C369S059100, C369S059200
Reexamination Certificate
active
08004957
ABSTRACT:
A recording and reproducing method has a recording pulse generating step of generating a recording pulse to set timing of a beam emitted from a laser according to data to be recorded on an information recording medium; a laser power control step of controlling a laser drive current according to a recording laser power; a beam detecting step of detecting a power of the beam emitted from the laser; a signal detecting step of detecting a signal level of a reproduction signal read out from the information recording medium; a step of binarizing the reproduction signal to generate a binarized signal; a step of generating a data signal synchronized with a reference clock signal with use of the binarized signal; and a step of detecting a shift in time interval between the binarized signal and the reference clock signal and feeding the shift back to the recording pulse.
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Nishimura Koichiro
Watanabe Koichi
Yasukawa Takakiyo
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Hitachi-LG Data Storage, Inc.
Renner Craig A.
Yodichkas Aneeta
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