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    • 3. 发明申请
    • A SYSTEM AND METHOD FOR DETERMINING THE POSITION OF A PLURALITY OF LASER SPOTS ON AN OPTICAL DISC
    • 用于确定光盘上多个激光射击位置的系统和方法
    • WO2008035257A1
    • 2008-03-27
    • PCT/IB2007/053705
    • 2007-09-14
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.CHEN, DayuBAUMGARTNER, Nicolas
    • CHEN, DayuBAUMGARTNER, Nicolas
    • G11B7/09G11B7/13
    • G11B7/0903G11B7/0943G11B7/131
    • A system for determining an angular measure (AM) of a plurality of spots intended to be applied to an optical disc, with respect to said optical disc, said system comprising: -a detecting unit for detecting light signals derived from said plurality of spots, said detecting unit comprising a set of detectors aligned according to a same direction D, each of said detectors being intended to receive one light signal derived from one spot of said plurality of spots, each of said detectors having a first light-sensitive area and a second light-sensitive area positioned on both sides of said direction D; a first output signal (OS1A; OS1B) being derived from said first light-sensitive area and a second output signal (OS2A; OS2B) being derived from said second light- sensitive area and -a generating unit (320) comprising: a) a first module (320) for generating, for each of said detectors, a set of first offset signals by calculating, the difference between said first output signal (OS1A;OS1B) and said second output signal (OS2A;OS2B); b) a second module for generating a set of second offset signals by calculating the difference of each pair of first offset signals; and c) a third module for determining said angular measure (AM) according to said set of second offset signals.
    • 一种用于确定旨在施加到光盘的多个点的角度测量(AM)的系统,对于所述光盘,所述系统包括: - 检测单元,用于检测从所述多个点导出的光信号, 所述检测单元包括根据相同方向D对准的一组检测器,每个所述检测器旨在接收从所述多个点中的一个点导出的一个光信号,每个所述检测器具有第一光敏区域和 位于所述方向D的两侧的第二感光区域; 从所述第一感光区域导出的第一输出信号(OS1A; OS1B)和从所述第二感光区域导出的第二输出信号(OS2A; OS2B)和-a生成单元(320),包括:a) 第一模块(320),用于通过计算所述第一输出信号(OS1A; OS1B)和所述第二输出信号(OS2A; OS2B)之间的差,为每个所述检测器产生一组第一偏移信号; b)第二模块,用于通过计算每对第一偏移信号的差异来产生一组第二偏移信号; 以及c)用于根据所述一组第二偏移信号确定所述角度测量(AM)的第三模块。