Optical information recording medium, optical information recording apparatus and optical information recording method
AssigneeSony Corporation
InventorsGoro Fujita, Takashi Iwamura
Life of this patent
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Abstract
An optical information recording medium includes a recording layer in which a track is formed, the track having recording marks linearly arranged thereon. Each recording mark has a dimension corresponding to a reference mark length, which serves as a reference, in a track direction along which the track extends, the dimension being smaller than dimensions of the recording mark in two directions perpendicular to the track direction.
Claims13
An optical information recording medium comprising:
- a recording layer in which a track is formed, the track having recording marks linearly arranged thereon,
- wherein each recording mark has a dimension corresponding to a reference mark length, which serves as a reference, in a track direction along which the track extends, the dimension being smaller than dimensions of the recording mark in two directions perpendicular to the track direction;
- wherein each recording mark is formed as a result of a two-photon absorption reaction caused by first irradiation with first recording light and a thermal reaction caused by second irradiation with second recording light after the first irradiation with the first recording light, the thermal reaction being caused in a change area generated by the two-photon absorption reaction caused by the first irradiation with the first recording light.
An optical information recording medium comprising:
- a recording layer containing a light-absorption change material which changes light absorption characteristics of the recording layer in response to a two-photon absorption reaction caused by first irradiation with first recording light and causes a thermal reaction in response to second irradiation with second recording light after the first irradiation with the first recording light, a refractive index of the recording layer being locally changed in response to the thermal reaction;
- wherein each recording mark is formed as a result of a two-photon absorption reaction caused by first irradiation with first recording light and a thermal reaction caused by second irradiation with second recording light after the first irradiation with the first recording light, the thermal reaction being caused in a change area generated by the two-photon absorption reaction caused by the first irradiation with the first recording light.
An optical information recording medium in which a recording mark is formed only in an area in which a thermal reaction is caused in a change area formed as a result of a two-photon absorption reaction caused by first irradiation with first recording light, the thermal reaction being caused by second irradiation with second recording light after the first irradiation with the first recording light;
- wherein each recording mark is formed as a result of a two-photon absorption reaction caused by first irradiation with first recording light and a thermal reaction caused by second irradiation with second recording light after the first irradiation with the first recording light, the thermal reaction being caused in a change area generated by the two-photon absorption reaction caused by the first irradiation with the first recording light.
An optical information recording apparatus comprising:
- a light source which emits recording light;
- a light emitting unit which irradiates an optical information recording medium with the recording light, the recording light including first recording light and second recording light emitted after the first recording light, a recording mark being formed in the optical information recording medium only in an area in which both a two-photon absorption reaction caused by first irradiation with the first recording light and a thermal reaction caused by second irradiation with the second recording light occur;
- a position adjusting unit which positions a focal point of the recording light emitted from the light emitting unit at a desired target position;
- and
- an irradiation control unit which controls the irradiation with the first recording light and the second recording light such that a change area irradiated with the first recording light and an irradiation area irradiated with the second recording light only partially overlap each other;
- wherein the light source emits both the first recording light and the second recording light.
Dependencies are inferred from the claim text.