Information recording method, recording condition detection method, and information recording apparatus
AssigneeNEC Corporation
InventorSeiichiro Miyaki
Life of this patent
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Abstract
A plurality of pits representing recording target information are formed on an optical disk, while a laser light having a predetermined power is irradiated onto the optical disk. When information is being recorded, a condition index representing a recording condition of the optical disk is derived with the use of an equation which is changeable in accordance with the kind of the optical disk and the operational environment of a recording apparatus. The power of the laser light irradiated onto the optical disk is adjusted so that the recording condition may be a predetermined recording condition based on the derived condition index.
Claims28
An information recording method of recording information on an optical disk, comprising:
- an information recording step of forming a plurality of pits representing recording target information on said optical disk by controlling a power of a laser light to be irradiated onto said optical disk;
- condition detecting step of deriving a condition index representing a recording condition of said optical disk, while the laser light is irradiated onto said optical disk in said information recording step, by using an equation which is changeable in accordance with a kind of said optical disk and an environment in which information recording is performed;
- and
- a power adjusting step of adjusting the power of the laser light to be irradiated in said information recording step, in order that said recording condition may be a predetermined recording condition, based on said condition index derived in said condition detecting step.
A condition detection method of detecting a recording condition of an optical disk, comprising:
- a level detecting step of detecting a level of a reflection light from said optical disk, while a laser light is irradiated onto said optical disk for information recording;
- and
- a condition detecting step of deriving a condition index representing said recording condition of said optical disk, by using the level detected in said level detecting step and an equation which is changeable in accordance with a kind of said optical disk and an environment in which information recording is performed.
An information recording apparatus for recording information on an optical disk, comprising:
- an irradiation unit which irradiates a laser light onto said optical disk;
- a power control unit which forms a plurality of pits representing recording target information on said optical disk, by controlling a power of the laser light irradiated by said irradiation unit;
- and
- a condition detection unit which derives a condition index representing a recording condition of said optical disk, by using an equation which is changeable in accordance with a kind of said optical disk and an environment in which said information recording apparatus is operated, while the laser light is irradiated onto said optical disk,
- wherein said power control unit controls the power of the laser light so that said recording condition may be a predetermined recording condition, based on said condition index derived by said condition detection unit.
Dependencies are inferred from the claim text.