Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2006-08-15
2006-08-15
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053300
Reexamination Certificate
active
07092338
ABSTRACT:
In a method and apparatus for controlling the power of a laser beam in an optical recording system that includes a laser light source, an optical detector detects a reflected write pulse that is a reflection of an incident recording light signal from the optical recording medium, and a signal generating device generates a mark formation effectiveness (MFE) signal according to the reflected write pulse. A laser power compensation circuit includes a filter for filtering the MFE signal so as to result in a first component, and a combiner for combining the first component and the MFE signal so as to result in a second component. The laser power compensation circuit controls laser beam power of the laser light source according to the first and second components for optimum information recording.
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Chen Chih-Yuan
Hsu Jin-Chuan
Haley Joseph
Korzuch William
MediaTek Inc.
Winston Hsu
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