Optical recording method

Details Optical recording method Optical recording method

2006-03-14

2009-10-13

Feild, Joseph H (Department: 2627)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

Reexamination Certificate

active

07602675

ABSTRACT:
Provided is an optical recording method for recoding information on a phase-change optical recording medium at a low linear velocity by use of a divided pulse method. When forming a plurality of recording marks by use of a constant divided pulse number m, a light irradiation time period of recording light for recording a recording mark having a time length of nT is divided in the order of {α1T, β1T, α2T, β2T, . . . , αiT, βiT, . . . , αmT, βmT} (in which m is a natural number representing a divided pulse number, αi(1≦i≦m) is a real number greater than 0, βi(1≦i≦m−1) is a real number greater than 0, and βmis a real number equal to or above 0). Then, the recording light having increased recording power Pwifor recording the shortest recording mark is applied so as to provide m satisfying a relation that an average value Pwshortof the recording power Pwiat the time periods of αiT for forming the shortest recording mark is greater than an average value Pwlongof the recording power Pwiat the time periods of αiT for forming the longest recording mark (Pwshort>Pwlong).

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