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    • 76. 发明申请
    • Method and System With Focus Control for Scanning an Information Carrier
    • 用于扫描信息载体的聚焦控制方法和系统
    • US20080267022A1
    • 2008-10-30
    • US12092829
    • 2006-11-07
    • Levinus Pieter Bakker
    • Levinus Pieter Bakker
    • G11B7/00
    • G11B7/0908G11B7/0033G11B7/0938G11B7/12
    • The invention relates to a method and system for reading data on a data layer (105) of an information carrier (101) comprising one or more servo marks (108, 109) positioned relative to said data layer (105), the system comprising: probe array generation means (104, 102) for generating a probe array comprising an array of light spots (103) intended to be applied to said information carrier (101) so as to generate output beams representative of said one or more servo marks (108, 109) and said data, wherein the distance between the focal point of one or more light spots of a portion of said probe array and a respective portion of said information carrier corresponding to at least one servo mark is different to the distance between the focal points of the light spots of the rest of the probe array and the rest of said information carrier; an image sensor (106) for receiving said output beams and generating a corresponding image; means (116) for deriving a contrast value in respect of at least of a portion of said image corresponding to said at least one servo mark (108, 109) and generating a control signal (125) derived from said contrast value, said control signal (125) being for application to actuation means (AC6) for adjusting the distance between said information carrier (101) and said array of light spots (103).
    • 本发明涉及一种用于在包括相对于所述数据层(105)定位的一个或多个伺服标记(108,109)的信息载体(101)的数据层(105)上读取数据的方法和系统,所述系统包括: 用于产生探针阵列的探针阵列产生装置(104,102),所述探针阵列包括旨在施加到所述信息载体(101)的光点阵列(103),以产生代表所述一个或多个伺服标记(108)的输出光束 ,109)和所述数据,其中所述探针阵列的一部分的一个或多个光点的焦点与对应于至少一个伺服标记的所述信息载体的相应部分之间的距离不同于焦点 探针阵列的其余部分和所述信息载体的其余部分的光点的点; 用于接收所述输出光束并产生相应图像的图像传感器(106); 用于根据与所述至少一个伺服标记(108,109)对应的所述图像的至少一部分导出对比度值并生成从所述对比度值导出的控制信号(125)的装置(116),所述控制信号 (125)用于施加到用于调节所述信息载体(101)和所述光点阵列(103)之间的距离的致动装置(AC 6)。