Storage medium, reproducing method, and recording method
OwnerKoji Takazawa, Seiji Morita +4inventors
InventorsKoji Takazawa, Seiji Morita, Yasuaki Ootera, Hideo Ando, Naoki Morishita, Kazuyo Umezawa
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Abstract
According to one embodiment, in a storage medium, a ratio of a minimum value of an amplitude of a wobble detection signal to a track shift detection signal is set to be equal to or greater than a predetermined value.
Claims3
A storage medium wherein a ratio of a minimum value of an amplitude of a wobble detection signal to a track shift detection signal is set to be equal to or greater than a predetermined value.
A method for reproducing information from a storage medium which comprises a transparent resin substrate having formed thereon a land and a groove which are wobbled in a track shape, and a recording film formed on the land and groove of the substrate, the film formed of a first dye formed of a dye portion formed of a styryl dye or a monomethine cyanine dye and an anion portion formed of an organic metal complex whose center metal is cobalt or nickel and a second dye formed of an organic metal complex whose center metal is cobalt or nickel, the method comprises the steps of detecting, when a focus spot of a laser light beam is irradiated to the groove, a track shift detection signal which corresponds to a shift of the track and detecting a wobble detection signal which corresponds to an amplitude of the wobble;
- and reproducing information from the storage medium when a ratio of a minimum value of an amplitude of the wobble detection signal to the track shift detection signal is set to 0.1 or more.
A method for recording information in a storage medium which comprises:
- a transparent resin substrate having formed thereon a land and a groove which are wobbled in a track shape;
- and
- a recording film formed on the land and groove of the substrate, the film formed of a first dye formed of a dye portion formed of a styryl dye or a monomethine cyanine dye and an anion portion formed of an organic metal complex whose center metal is cobalt or nickel and a second dye formed of an organic metal complex whose center metal is cobalt or nickel, the method comprising the steps of:
- detecting, when a focus spot of a laser light beam is irradiated to the groove, a track shift detection signal which corresponds to a shift of the track and detecting a wobble detection signal which corresponds to an amplitude of the wobble;
- and
- recording the information in the storage medium when a ratio of a minimum value of an amplitude of the wobble detection signal to the track shift detection signal is set to 0.1 or more.
Dependencies are inferred from the claim text.