Method and device for writing an optical record carrier
AssigneeU.S. Philis Corporation
InventorsRoel Van Woudenberg, Johan P. W. B. Duchateau, Hermanus J. Borg
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Abstract
A method for writing an optical record carrier, in which a mark representing recorded data is written in the record carrier by a sequence of radiation pulses. The radiation power has a different level in between the pulses of a sequence and immediately after the last pulses of a sequence. This allows an independent control of the leading and trailing edge jitter of the marks written.
Claims11
A method of recording marks representing data in an information layer of an optical record carrier by irradiating the information layer by a pulsed radiation beam, each mark being written by a sequence of pulses, the radiation beam has a first, bias power level between the pulses, a second, cooling power level after the last pulse of the sequence, followed by a third, erase power level, and in which the first power level is lower than the second power level and the second power level is lower than the third power level.
An optical recording device for recording data in the form of marks on an information layer of a record carrier by a radiation beam, the device comprising:
- a radiation source providing the radiation beam;
- and
- control unit means for providing a sequence of pulses for writing a mark and for controlling the power of the radiation beam for automatically providing a first, bias power level between the pulses, a second cooling power level after the last pulse of the sequence, followed by a third, erase power level, and in which the first power level is lower than the second power level and the second power level is lower than the third power level.
Dependencies are inferred from the claim text.