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    • 23. 发明申请
    • METHOD AND APPARATUS FOR CONTROLLING FOCUS OF AN OPTICAL INFORMATION STORAGE MEDIUM
    • 用于控制光信息存储介质聚焦的方法和装置
    • US20080181062A1
    • 2008-07-31
    • US11957663
    • 2007-12-17
    • Sung-hyun KIMYoung-jae ParkTatsuhiro Otsuka
    • Sung-hyun KIMYoung-jae ParkTatsuhiro Otsuka
    • G11B7/00
    • G11B7/08511G11B7/13925G11B7/24038G11B2007/0013
    • A method and apparatus for controlling a focus of an optical disk in an optical disk recording/reproducing apparatus are provided. A method of controlling focusing onto an optical information storage medium having a plurality of data layers during an interlayer jump by moving an object lens up and down includes receiving a focus jump command for a focus jump from a current data layer to a target data layer, performing spherical aberration correction on the target data layer, holding a focusing servo with respect to the current data layer, and performing the focus jump to the target data layer in which the performing of the focus jump includes applying an acceleration pulse to a focus control signal for controlling driving of the object lens, and terminating the application of the acceleration pulse when the level of a sum signal resulting from the summation of the amplitude of light reflected from the optical information storage medium and collected by a light detector is less than a predetermined level. As a result, the focus jump can be performed rapidly and accurately. Moreover, by performing spherical aberration correction again after the focus jump, compatibility among various types of optical information storage media can be increased.
    • 提供了一种用于控制光盘记录/再现装置中的光盘的焦点的方法和装置。 通过上下移动物镜在层间跳跃期间将焦点控制在具有多个数据层的光学信息存储介质上的方法包括:从聚焦跳跃接收目标数据层到目标数据层的聚焦跳转命令, 在目标数据层上执行球面像差校正,保持相对于当前数据层的聚焦伺服,以及执行聚焦跳转到目标数据层,其中执行聚焦跳跃包括将加速度脉冲施加到聚焦控制信号 用于控制物镜的驱动,并且当从光信息存储介质反射并由光检测器收集的光的振幅的总和得到的和信号的电平小于预定值时终止加速度脉冲的施加 水平。 因此,可以快速,准确地进行焦点跳跃。 此外,通过在聚焦跳转之后再次进行球面像差校正,可以增加各种类型的光学信息存储介质之间的兼容性。
    • 25. 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。
    • 28. 发明申请
    • Apparatus for detecting minimum shift keying mark from optical disc and method thereof
    • 用于从光盘检测最小移位键控标记的装置及其方法
    • US20060176797A1
    • 2006-08-10
    • US11305324
    • 2005-12-19
    • Sergey ChekcheyevTatsuhiro Otsuka
    • Sergey ChekcheyevTatsuhiro Otsuka
    • G11B5/09
    • G11B7/0053
    • Disclosed are an apparatus for detecting wobble information from an optical disc and a method thereof. The apparatus for detecting wobble information has a phase lock loop (PLL) for generating an oscillation signal with a frequency equal to that of a wobble signal having a minimum keying (MSK) mark; a control signal generator for generating at least one control signal in accordance with the oscillation signal; a memory for generating at least one heterodyne signal with a frequency equal to that of the MSK mark according to the at least one control signal; a multiplier for multiplying the wobble signal by the at least one heterodyne signal; an integrator for integrating the multiplied signal outputted from the multiplier, respectively; and a comparator for comparing each of the integrated values outputted from the integrators with a predetermined threshold to output a detection signal.
    • 公开了一种用于从光盘检测摆动信息的装置及其方法。 用于检测摆动信息的装置具有用于产生频率等于具有最小键控(MSK)标记的摆动信号的频率的振荡信号的锁相环(PLL); 控制信号发生器,用于根据振荡信号产生至少一个控制信号; 用于根据所述至少一个控制信号产生频率等于所述MSK标记的频率的至少一个外差信号的存储器; 用于将所述摆动信号乘以所述至少一个外差信号的乘法器; 积分器,分别对乘法器输出的相乘信号进行积分; 以及比较器,用于将从积分器输出的积分值中的每一个与预定阈值进行比较,以输出检测信号。