Optical information recording method, optical information recording device and optical information recording medium

An optical information recording device, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the device comprising:
• a linear velocity setting portion for setting a first linear velocity v1 and a second linear velocity v2 that is higher than the first linear velocity v1 for the rotating optical information recording medium;
• a recording pulse generation portion for generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting portion;
• and
• a laser drive portion for irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation portion,
• wherein the laser drive portion controls a power level of the laser light in such a manner that
• Pbt1≦Pe1 and Pe2<Pwb2<Pwa2 is satisfied, and
• a waveform of the laser light for the second linear velocity v2 is set to be a stepwise waveform such that a recording pulse of the power level Pwb2 is provided immediately after a recording pulse of the power level Pwa2,
• where Pbt1 represents a first inter-pulse power level indicating a power level between recording pulses in the recording pulse train for the first linear velocity v1,
• Pwa2 represents a recording power indicating a power level of the recording power for the second linear velocity v2,
• Pwb2 represents a second recording power indicating a power level of a second recording power for the second linear velocity v2,
• Pe1 represents a first erase power level indicating a power level of the erase power for the first linear velocity v1, and
• Pe2 represents a second erase power level indicating a power level of the erase power for the second linear velocity v2.

An optical information recording device, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the device comprising:
• a linear velocity setting portion for setting a first linear velocity v1, which is a lower limit, and a second linear velocity v2, which is an upper limit, with respect to the rotating optical information recording medium,
• a recording pulse generation portion for generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity selling portion;
• and
• a laser drive portion for irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation portion,
• wherein Pbt1≦Pe1 and Pe2<Pwb2<Pwa2 are satisfied,
• the laser light is irradiated while switching powers among the recording power level, the first erase power level and the first inter-pulse power level, when the linear velocity v is v1<v<v0, where v0 represents a predetermined linear velocity,
• a waveform of the laser light is set to be a stepwise waveform such that a recording pulse of the power level Pwb2 is provided immediately after a recording pulse of the power level Pwa2, when the linear velocity v is v0<v<v2, and
• the power level Pwb of the second recording power is controlled so that (Pwb−Pe) is increased, depending on an increase in the linear velocity v,
• where Pbt1 represents a first inter-pulse power level indicating a power level between recording pulses in the recording pulse train for the first linear velocity v1,
• Pwa2 represents a recording power indicating a power level of the recording power for the second linear velocity v2,
• Pwb2 represents a second recording power indicating a power level of a second recording power for the second linear velocity v2,
• Pe1 represents a first erase power level indicating a power level of the erase power for the first liner velocity v1,
• Pe2 represents a second erase power level indicating a power level of the erase power for the second linear velocity v2,
• v1<v<v2 is satisfied,
• Pwb represents a power level of the second recording power for a linear velocity v of v1<v<v2, and
• Pe represents a power level of the erase power for the liner velocity v.

An optical information recording device, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and en erase power level,
• the device comprising:
• a linear velocity setting portion for setting a first linear velocity v1, which is a lower limit, and a second linear velocity v2, which is an upper limit with respect to the rotating optical information recording medium,
• a recording pulse generation portion for generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting portion;
• and
• a laser drive portion for irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation portion,
• wherein duty ratios of the recording pulses are set to be constant when the linear velocity v is v1≦v<v0 and when the linear velocity v is v0<v≦v2, respectively, and
• the power level Pbt of the inter-pulse is controlled so that (Pbt−Pe) is increased, depending on an increase in the linear velocity v, when the linear velocity v is v1≦v<v0 and when the linear velocity v is v0<v≦v2, respectively, where v0 represents a predetermined linear velocity,
• where Pbt represents a power level between the recording pulses in the recording pulse train for a linear velocity v of v1<v<v2, Pe represents a power level of the erase power for the linear velocity v, and v1<v0<v2.

An optical information recording method, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the method comprising:
• a linear velocity setting step of setting a first linear velocity v1 and a second linear velocity v2 that is higher than the first linear velocity v1 for the rotating optical information recording medium;
• a recording pulse generation step of generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting step;
• and
• a laser drive step of irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation step,
• wherein in a laser drive step, a power level of the laser light is controlled in such a manner that
• Pbt1≦Pe1 and Pe2<Pbt2<Pwa2 is satisfied,
• where Pbt1 represents a first inter-pulse power level indicating a power level between recording pulses in the recording pulse train for the first linear velocity v1,
• Pbt2 represents a second inter-pulse power level indicating a power level between the recording pulses in the recording pulse train for the second linear velocity v2,
• Pwa2 represents a recording power level indicating a power level of the recording power for the second linear velocity v2,
• Pe1 represents a first erase power level indicating a power level of the erase power for the first linear velocity v1, and
• Pe2 represents a second erase power level indicating a power level of the erase power for the second linear velocity v2.

An optical information recording method, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the method comprising:
• a linear velocity setting step of setting a first linear velocity v1 and a second linear velocity v2 that is higher than the first linear velocity v1 for the rotating optical information recording medium;
• a recording pulse generation step of generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting step;
• and
• a laser drive step of irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation step,
• wherein in the laser drive step, a power level of the laser light is controlled in such a manner that
• Pbt1≦Pe1 and Pe2<Pwb2<Pwa2 is satisfied, and
• a waveform of the laser light for the second linear velocity v2 is caused to be a stepwise waveform such that a recording pulse of the power level Pwb2 is provided immediately after a recording pulse of the power level Pwa2,
• where Pbt1, represents a first inter-pulse power level indicating a power level between recording pulses in the recording pulse train for the first linear velocity v1,
• Pwa2 represents a recording power indicating a power level of the recording power for the second linear velocity v2,
• Pwb2 represents a second recording power indicating a power level of a second recording power for the second linear velocity v2,
• Pe1 represents a first erase power level indicating a power level of the erase power for the first linear velocity v1, and
• Pe2 represents a second erase power level indicating a power level of the erase power for the second linear velocity v2.

An optical information recording method, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the method comprising:
• a liner velocity setting step of setting a first liner velocity v1, which is a lower limit, and a second linear velocity v2, which is an upper limit, with respect to the rotating optical information recording medium,
• a recording pulse generation step of generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting portion;
• and
• a laser drive step of irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation portion,
• wherein Pbt1≦Pe1 and Pe2<Pwb2<Pwa2 are satisfied,
• the laser light is emitted while switching powers among the recording power level, the first erase power level and the first inter-pulse power level, when the linear velocity v is v1<v<v0, where v0 represents a predetermined linear velocity,
• a waveform of the laser light is caused to be a stepwise waveform such that a recording pulse of the power level Pwb2 is provided immediately after a recording pulse of the power level Pwa2, when the linear velocity v is v0<v<v2, and
• the power level Pwb of the second recording power is controlled so that (Pwb−Pe) is increased, depending on an increase in the linear velocity v,
• where Pbt1 represents a first inter-pulse power level indicating a power level between recording pulses in the recording pulse train for the first linear velocity v1,
• Pwa2 represents a recording power indicating a power level of the recording power for the second linear velocity v2,
• Pwb2 represents a second recording power indicating a power level of a second recording power for the second linear velocity v2,
• Pe1 represents a first erase power level indicating a power level of the erase power for the first linear velocity v1,
• Pe2 represents a second erase power level indicating a power level of the erase power for the second linear velocity v2,
• v1<v0<v2,
• Pwb represents a power level of the second recording power for a linear velocity v of v1<v<v2, and
• Pe represents a power level of the erase power for the linear velocity v.

An optical information recording method, wherein a mark or a space having a length corresponding to a length of a data recording code is formed by irradiating a rotating optical information recording medium with laser light to change optical characteristics of a photosensitive recording layer, and

• the mark is formed by irradiating the rotating optical information recording medium with the laser light with a power being switched among a plurality of power levels including at least a recording power level and an erase power level,
• the method comprising:
• a linear velocity setting step of setting a first linear velocity v1, which is a lower limit, end a second linear velocity v2, which is an upper limit, with respect to the rotating optical information recording medium,
• a recording pulse generation step of generating a recording pulse signal composed of a recording pulse and/or a recording pulse train, depending on a result of setting by the linear velocity setting portion;
• and
• a laser drive step of irradiating the optical information recording medium with the laser light based on the recording pulse signal generated by the recording pulse generation portion,
• wherein duty ratios of the recording pulses are set to be constant when the linear velocity v is v1≦v<v0 and when the linear velocity v is v0<v≦v2, respectively, and
• the power level Pbt of the inter-pulse is controlled so that (Pbt−Pe) is increased, depending on an increase in the linear velocity v, when the linear velocity v is v1≦v<v0 and when the linear velocity v is v0<v≦v2 respectively, where v0 represents a predetermined linear velocity,
• where Pbt represents a power level between the recording pulses in the recording pulse train for a linear velocity v of v1<v<v2, Pe represents a power level of the erase power for the linear velocity v, and v1<v0<v2.