Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...
Reexamination Certificate
2009-10-06
2011-10-25
Danielsen, Nathan (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing for controlling recording light...
Reexamination Certificate
active
08045437
ABSTRACT:
A device and method of recording marks representing data in an information layer of a record carrier includes irradiating the information layer by a pulsed radiation beam, each mark being written by a sequence of pulses. The recorded marks are erasable by irradiating the information layer with an erase radiation beam. The erase radiation beam has a first erase power level (e1) for a first erase period (t1), a second erase power level (e2) higher than or equal to the first erase power level (e1) for a second erase period (t2), and a third erase power level (e3) lower than the second erase power level (e2) for a third erase period (t3).
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Danielsen Nathan
Koninklijke Philips Electronics , N.V.
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