Optical recording medium with power calibration areas and a recording method therefor with optimum power control
View Patent ↗In an optical recording medium having a plurality of recording layers on which information can be recorded by irradiating a laser beam from one side thereof, an optimum recording power to each of the recording layers can be determined. The optical recording medium has a plurality of recording layers on which information can be recorded by irradiating a laser beam from one side thereof, and each of the recording layers has a power calibration area (PCA) for optimizing the intensity of the laser beam.
1. An optical recording medium comprising:
an optical-transmissible first substrate;
a first recording layer disposed on said first substrate, on which information can be recorded by irradiating a laser beam from the first substrate's side;
a second recording layer disposed on said first recording layer, on which information can be recorded by irradiating said laser beam; and
each of said first recording layer and said second recording layer including power calibration areas to optimizing intensity of said laser beam;
wherein recording of information on said first recording layer and recording of information on said second recording layer are performed forward opposite directions, and
a part of said first recording layer overlapping on said power calibration area of said second recording layer is in a previously-recorded state.
2. The optical recording medium according to claim 1 , wherein recording of information on said first recording layer is performed before recording of information on said second recording layer.
3. An optical recording medium comprising:
an optical-transmissible first substrate;
a first recording layer disposed on said first substrate, on which information can be recorded by irradiating a laser beam from the first substrate's side;
a second recording layer disposed on said first recording layer, on which information can be recorded by irradiating said laser beam; and
each of said first recording layer and said second recording layer including power calibration areas to optimizing intensity of said laser beam;
wherein recording of information on said first recording layer and recording of information on said second recording layer are performed forward opposite directions, and
said power calibration area of said second recording layer has an area not overlapped on said power calibration area of said first recording layer.
4. The optical recording medium according to claim 1 , wherein a recommended recording power value for each of said recording layers is beforehand recorded.
5. The optical recording medium according to claim 3 , wherein a recommended recording power value for each of said recording layers is beforehand recorded.
6. A recording method for an optical recording medium,
said optical recording medium including an optical-transmissible first substrate; a first recording layer disposed on said first substrate, on which information can be recorded by irradiating a laser beam from the first substrate's side; a second recording layer disposed on said first recording layer, on which information can be recorded by irradiating said laser beam; and each of said first recording layer and said second recording layer including power calibration areas to optimizing intensity of said laser beam;
the method comprising:
performing recording of information on said first recording layer and recording of information on said second recording layer in forward opposite directions;
wherein a part of said first recording layer overlapping on said power calibration area of said second recording layer is in a previously-recorded state.
7. The recording method for the optical recording medium according to claim 6 , wherein recording of information on said first recording layer is performed before recording of information on said second recording layer.
8. A recording method for an optical recording medium,
said optical recording medium including an optical-transmissible first substrate; a first recording layer disposed on said first substrate, on which information can be recorded by irradiating a laser beam from the first substrate's side; a second recording layer disposed on said first recording layer, on which information can be recorded by irradiating said laser beam; and
each of said first recording layer and said second recording layer including power calibration areas to optimizing intensity of said laser beam;
the method comprising:
performing recording of information on said first recording layer and recording of information on said second recording layer in forward opposite directions;
wherein said power calibration area of said second recording layer has an area not overlapped on said power calibration area of said first recording layer.
9. The optical recording medium according to claim 3 , wherein recording of information on said first recording layer is performed before recording of information on said second recording layer.
10. The recording method for the optical recording medium according to claim 8 , wherein recording of information on said first recording layer is performed before recording of information on said second recording layer.