Optical disc medium and optical disc device
    45.
    发明公开
    Optical disc medium and optical disc device 审中-公开
    Optisches Plattenmedium und optische Plattenvorrichtung

    公开(公告)号:EP1729293A2

    公开(公告)日:2006-12-06

    申请号:EP06010502.0

    申请日:2006-05-22

    申请人: NEC Corporation

    发明人: Yamanaka, Yutaka

    IPC分类号: G11B7/007 G11B7/24

    摘要: Areas, which are located on the inner peripheral sides of multi-layered information recording areas (20) and have the same radial ranges, are set as burst cutting area forming zones, and a burst cutting area (BCA) (101) is formed in one information recording layer. All of the same radial ranges of the other information recording layers are formed as mirror surfaces (5). Thereby, interference from other layers and scattering of readout light are prevented, so reading of the burst cutting area (BCA) is realized stably.

    摘要翻译: 位于多层信息记录区域(20)的内周侧并且具有相同径向范围的区域被设置为突发切割区域形成区域,并且形成突发切割区域(BCA)(101) 一个信息记录层。 其他信息记录层的所有相同的径向范围形成为镜面(5)。 由此,防止来自其他层的干扰和读出光的散射,从而稳定地实现了突发切割区域(BCA)的读取。

    Spot position-discriminating system and method for discriminating spot position
    49.
    发明公开
    Spot position-discriminating system and method for discriminating spot position 失效
    系统和Verfahren zur Bestimmung der Position eines Strahlungsflecks

    公开(公告)号:EP0845776A1

    公开(公告)日:1998-06-03

    申请号:EP97120848.3

    申请日:1997-11-27

    申请人: NEC CORPORATION

    发明人: Yamanaka, Yutaka

    IPC分类号: G11B7/085 G11B7/09 G11B7/13

    摘要: It is an objection of the invention to provide a rewritable optical disk system, which can discriminate the position of a spot on an optical disk by detecting the difference in a intensity distribution of a reflected light from the optical disk between a land track and a groove track. The spot positions detected by partially detecting the intensity distribution of the reflected light in a condition that the spot on the optical disk is lightly defocused, and thereby the difference in the intensity distribution of a reflected light between the land and groove tracks can be discriminated.

    摘要翻译: 本发明的目的是提供一种可重写光盘系统,其可以通过检测在光阑轨道和凹槽之间的来自光盘的反射光的强度分布的差异来区分光盘上的斑点的位置 跟踪。 通过在光盘上的光斑轻微散焦的状态下部分地检测反射光的强度分布而检测到的光斑位置,从而可以区分纹间和纹道之间的反射光的强度分布的差异。