| 摘要 |
<p>A disk reproducing device for reproducing a domain-wall-displacement type, super-resolution reproducing magnetooptic disk, wherein when the wavelength of a laser beam for reproducing signals recorded on an MO disk by being applied to the MO disk is λ and its numerical aperture NA, the width Tw of a track provided on the MO disk satisfies Tw ≤ 0.046 × (λ/NA), whereby a detrack allowance of at least 160 nmpp is ensured and designing of tracking of a disk drive is made easy.</p> |
