Method of recording information on optical recording medium,...

Details Method of recording information on optical recording medium,... Method of recording information on optical recording medium,...

2005-08-24

2008-12-30

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

Reexamination Certificate

active

07471606

ABSTRACT:
An information recording method enables the precise formation of a recording mark on a recording layer having a high light transmittance such as an L1 layer of a double-layered optical recording medium. The information recording method uses the following recording strategy. A laser beam is pulse-modulated so as to create a pulse series including a write pulse of a recording power and a cooling pulse of a base power. Data to be recorded is modulated to have a length of a recording mark along a track of the recording layer. At the same time, the length of the recording mark is made to correspond to an integral multiple nT of T where T is one clock cycle. An nT recording mark corresponding to nT is recorded by using the same number of write pulses and cooling pulses when n is 4 or larger. Moreover, an average width AveTc for a single cooling pulse width Tc is set to satisfy: 1.0<AveTc/T<1.6 and a total pulse width SumTc of the used cooling pulses is set to satisfy: 0.5≦SumTc
T≦0.8.

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