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    • 4. 发明申请
    • FOCUS PULL-IN METHOD AND OPTICAL DISC DRIVE THEREOF
    • 聚焦拉拔方法和光盘驱动器
    • US20080094953A1
    • 2008-04-24
    • US11746852
    • 2007-05-10
    • Young-Jae ParkTatsuhiro OtsukaSung-hyun Kim
    • Young-Jae ParkTatsuhiro OtsukaSung-hyun Kim
    • G11B7/09
    • G11B7/08511G11B2007/0006
    • A focus pull-in method to perform an accurate focus pull-in operation in an optical disc drive using a holographic optical element (HOE) in consideration of a pseudo s-curve and an optical disc drive capable of performing the focus pull-in method, the method comprising checking whether a pseudo s-curve is contained in a focus error signal that is generated when an object lens of the optical disc drive is moved upwards or downwards, and, if the pseudo s-curve is contained in the focus error signal, controlling a focus pull-in operation for a disc loaded into the optical disc drive according to detection conditions for the pseudo s-curve. Accordingly, it is possible to accurately focus the data layer even during the driving of the disc that uses a wavelength that results in a low diffractive efficiency of the HOE.
    • 考虑到伪s曲线的全息光学元件(HOE)和能够执行聚焦拉入方式的光盘驱动器在光盘驱动器中执行准确的聚焦拉入操作的聚焦拉入方法 该方法包括检查当光盘驱动器的物镜向上或向下移动时产生的聚焦误差信号中是否包含伪s曲线,并且如果伪s曲线包含在聚焦误差中 信号,根据伪s曲线的检测条件控制装载到光盘驱动器中的光盘的聚焦拉入操作。 因此,即使在使用导致HOE的低衍射效率的波长的盘的驱动期间,也可以精确地聚焦数据层。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR IDENTIFYING OPTICAL INFORMATION STORAGE MEDIUM
    • 用于识别光信息存储介质的方法和装置
    • US20080151701A1
    • 2008-06-26
    • US11749377
    • 2007-05-16
    • Young-jae PARKKab-kyun JeongSung-hyun Kim
    • Young-jae PARKKab-kyun JeongSung-hyun Kim
    • G11B11/00
    • G11B19/12G11B7/08511G11B7/0945G11B7/13925G11B2007/0006G11B2007/0013
    • A method and apparatus for identifying an optical information storage medium, the method of identifying the optical information storage medium loaded into an apparatus for reproducing/recording the optical information storage medium including: moving an object lens at a predetermined velocity in a first direction or a second direction while the optical information storage medium is loaded; generating a sum signal by adding magnitudes of beams reflected by the optical information storage medium and condensed by an optical detector; measuring a first time period during which the sum signal has a value greater than a first level; and detecting a thickness of data layers of the optical information storage medium based on the first time period, wherein the thickness of the data layers corresponds to the type of the optical information storage medium.
    • 一种用于识别光学信息存储介质的方法和装置,识别装载到用于再现/记录光学信息存储介质的设备中的光学信息存储介质的方法,包括:以预定速度沿第一方向移动物镜或 第二方向,同时加载光学信息存储介质; 通过将由光信息存储介质反射的光束的大小相加并由光检测器进行会聚来产生和信号; 测量所述和信号具有大于第一电平的值的第一时间段; 以及基于所述第一时间段检测所述光学信息存储介质的数据层的厚度,其中所述数据层的厚度对应于所述光学信息存储介质的类型。