Patent ID: 7978574

Claim:
An optical information recording method comprising: irradiating an optical information recording medium with a laser beam; forming at least one of marks and spaces to vary optical characteristics of a recording film of the optical information recording medium; forming the marks by at least one of recording pulses in which a power of the laser beam is switched between a plurality of power levels including at least a recording power and an erasure power, and recording a recording pulse train in which the power of the laser beam is switched between the plurality of power levels; and recording information to the optical information recording medium at two different linear velocities, wherein the recording power is controlled so as to satisfy (Pp 1 /Ppth 1 )<(Pp 2 /Ppth 2 ), where (i) Ppth 1 is a threshold value of the recording power at which a quality of a reproduction signal drops under a specific value, when a test signal is recorded at a first linear velocity v 1 , with the erasure power fixed and the recording power varied, (ii) Ppth 2 is the threshold value of the recording power at which the quality of the reproduction signal drops under a specific value, when the test signal is recorded at a second linear velocity v 2 that is higher than the first linear velocity v 1 , with the erasure power fixed and the recording power varied, (iii) Pp 1 is the recording power, when the information is recorded at the first linear velocity v 1 , and (iv) Pp 2 is the recording power, when the information is recorded at the second linear velocity v 2 .