OPTICAL READ DEVICE, INFORMATION PROCESSING DEVICE USING OPTICAL RECORDING MEDIUM, AND INFORMATION REPRODUCTION METHOD

    公开(公告)号:EP1431968A1

    公开(公告)日:2004-06-23

    申请号:EP03794147.3

    申请日:2003-08-29

    申请人: Sony Corporation

    IPC分类号: G11B7/13 G11B7/005 G11B7/09

    摘要: An optical reading unit which ensures that address information recorded as guide groove wobbles on an optical recording medium is easily played back. A light-receiving device (20) for detecting returning light from the optical recording medium has detection areas (21A to D) delimited by a plurality of split lines (22), (23), and (24). The position of one of the split lines functioning as a detection reference line is changed according to the position of a returning light spot S on a light-receiving surface (21) of the light-receiving device (20) and push-pull signals (PP1 to 3) are acquired by calculating the difference between signals received on two detection areas delimited by the split line to eliminate common-mode components.

    摘要翻译: 一种光学读取单元,其确保记录为导向槽的地址信息在光学记录介质上摆动是容易回放的。 用于检测来自光记录介质的返回光的光接收装置(20)具有由多个分割线(22),(23)和(24)限定的检测区域(21A至D)。 用作检测基准线的分割线之一的位置根据光接收装置(20)的受光面(21)上的返回光点S的位置和推挽信号( PP1至3)通过计算在由分割线限定的两个检测区域上接收的信号之间的差异来获取,以消除共模分量。