OPTICAL DISC AND OPTICAL DISC REPRODUCTION DEVICE
    1.
    发明公开
    OPTICAL DISC AND OPTICAL DISC REPRODUCTION DEVICE 审中-公开
    欧洲知识产权局日前宣布,伊朗伊斯兰堡爱尔兰

    公开(公告)号:EP1914743A1

    公开(公告)日:2008-04-23

    申请号:EP06781939.1

    申请日:2006-07-28

    IPC分类号: G11B7/24

    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.

    摘要翻译: 光盘主要包括记录层和粘性可变材料层。 当激光束被照射以再现写在记录层上的记录时,粘性可变材料层的一部分晶体薄层被软化以改变软化区域的光学常数。 因此,在软化区域和其他区域之间的边界处产生具有不连续光学常数的平面,从而在光斑中产生环状特定区域。 环形特定区域允许以与分辨率极限大的其他记录图案的信号强度相同的信号强度来再现小于或等于分辨率极限的记录图案。