摘要:
An optical disk primarily includes a recording layer and a viscosity-variable material layer. When a laser beam is irradiated to reproduce a record written on the recording layer, part of the crystalline thin layer of the viscosity-variable material layer is softened to vary the optical constant of the softened region. Consequently, a plane having discontinuous optical constants is produced at the boundary between the softened region and the other region, so that a ring-shaped specific region is produced in a light spot. The ring-shaped specific region allows record patterns smaller than or equal to the resolution limit to be reproduced with the same signal intensity as that of the other record patterns larger than the resolution limit.
摘要:
A super-resolution information recording medium, a recording/reproducing apparatus, and a recording/reproducing method uses an information recording medium provides a super-resolution effect by fluid bubbles. The fluid bubbles are formed in at least a portion of the medium by a light beam radiated to reproduce a signal from the information recording medium. Accordingly, the super-resolution information recording medium has improved optical characteristics, so that better recording/reproduction is possible.
摘要:
Provided is a methacrylic resin composition to be used for molding by means of a metallic mold having a plurality of nano-scale concavo-convex patterns on the surface thereof. The methacrylic resin composition comprises a methacrylic resin (A) having an MFR at 230°C under a load of 3.8 kg within the range of 0.1 to 50; and at least one component (B) selected from the group consisting of higher fatty acid esters, higher aliphatic alcohols, higher fatty acids, higher fatty acid amides, and higher fatty acid metal salts, wherein the content of the component (B) is 0.2 to 0.5 parts by weight with respect to 100 parts by weight of the methacrylic resin (A).
摘要:
An optical recording medium (10) includes a substrate (12), a first dielectric layer (14), a recording layer (16), a second dielectric layer (18), a super-resolution layer (20), and a third dielectric layer (22), which are provided in that order. The super-resolution layer (20) is formed of a material configured such that voids are generated when the material is irradiated with DC light at a predetermined irradiation power for 1 to 300 seconds. Therefore, super-resolution reproduction can be made such that the irradiation power of a readout laser beam does not depend on the size of a recording mark.