JP2006040365A5 - - Google Patents

Claims (8)

An information recording method for recording information by irradiating an optical disk with energy to form a recording mark,
A first step of performing test writing on the optical disc at a first recording speed;
After the first step, a second step of performing test writing on the optical disc at a second recording speed different from the first recording speed, overlaid on the portion recorded in the first step. When,
Reproducing the information recorded in the second step, and determining the power of the energy at the second recording speed based on the reproduced signal;
An information recording method, wherein information is recorded on the optical disc by irradiating the energy beam at the determined recording power at the second recording speed.   The information recording method according to claim 1, wherein the first recording speed is lower than the second recording speed.   The information recording method according to claim 1, wherein the power is determined based on jitter.   The step of determining the power obtains the relationship between the jitter and the recording power by measuring each jitter at a plurality of recording powers, and determines the center power of the two recording powers crossing a predetermined jitter threshold from the relationship. The information recording method according to claim 1, wherein the information recording step is a step of determining the power of the energy. An information recording method for recording information by irradiating an optical disk with energy to form a recording mark,
A first step of performing test writing on the optical disc at a first recording speed;
After the first step, a second step of performing test writing on the optical disc at a second recording speed different from the first recording speed, overlaid on the portion recorded in the first step. When,
Reproducing the information recorded in the second step, and determining a first power of the energy at the second recording speed based on the reproduced signal;
A fourth step of performing test writing on the optical disc at a third recording speed different from the first and second, and the second recording speed is a speed between the first and third recording speeds; And
After the fourth step, a fifth step of performing test writing on the optical disc at the second recording speed over the portion recorded in the fourth step;
Reproducing the information recorded in the fifth step, and determining a second power of the energy at the second recording speed based on the reproduced signal;
An information recording method for recording information on the optical disc by irradiating the energy beam at the second recording speed with a higher power of the first power and the second power. .   6. The information recording method according to claim 5, wherein the first and second powers are determined based on jitter. An information recording method for recording information by irradiating an optical disk with energy to form a recording mark,
During test writing recording, the relative speed of the optical disc and the energy irradiation is changed, and then the recorded information is reproduced and signal evaluation is performed, a recording waveform is determined based on the signal evaluation, and information is recorded using the recording waveform. Information recording method for recording. A laser light source for irradiating the optical disk with energy by a laser beam;
A detector for receiving the laser beam reflected by the optical disc;
An amplifier circuit for converting and amplifying the output current of the detector into a voltage;
A spindle motor for rotating the optical disc;
A motor control circuit for rotating the spindle motor;
A laser drive circuit for emitting the laser light source;
Based on the output signal of the amplifier circuit, the motor control circuit is set with the number of revolutions of the spindle motor, and the laser drive circuit has a controller for setting the emission power level and emission waveform of the laser light source. And
The controller sets the rotational speed of the spindle motor in the motor control circuit so as to change a linear velocity at the time of base recording in the trial writing and a linear velocity at the time of overwriting in the region of the base recording. A characteristic information recording apparatus.