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    • 27. 发明授权
    • Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
    • 具有光学拾取装置的记录/再现装置用于从不同厚度的盘读取信息并将信息记录到盘上
    • US08848502B2
    • 2014-09-30
    • US10441111
    • 2003-05-20
    • Chul-woo LeeJang-hoon Yoo
    • Chul-woo LeeJang-hoon Yoo
    • G11B7/135G11B7/1353G11B7/1392G11B7/1374G11B7/1372G11B7/00
    • G11B7/1374G11B7/1353G11B7/13922G11B2007/0006G11B2007/13727
    • A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk, a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk, and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector; and a processing unit to process an information signal to control the incident light generated by the light source, and to process the detected light from the photodetector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDs) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.
    • 一种具有光学拾取装置的记录/再现装置,其具有很少的球面像差的光利用效率。 记录和/或再现装置包括具有与光盘相对设置的物镜的光学拾取器,具有被分成对应于近轴区域的中心,中间和周边区域的光通过区域,中间轴区域和远轴区域 入射光的中心区域和外围区域的曲率优化为薄盘,中间区域的曲率针对厚盘优化,光源通过物镜向盘照射光; 用于检测从光盘反射的光的光检测器和设置在物镜和光源之间的光束分离器,用于将光从光源向物镜透射,并将从光盘反射的光衍射到光检测器; 以及处理单元,处理信息信号以控制由光源产生的入射光,并处理来自光电检测器的检测光。 因此,光拾取装置可以用于使用通过所述物镜的近中和中间区域的光束而使用厚度的光盘(CD),以及使用经过近距离的光束的薄的数字视盘(DVD) 所述物镜的远轴区域,无论盘的厚度如何,都可以检测信号而不拾取噪声。
    • 28. 发明授权
    • Encoder capable of compensating for tilt, hard disk drive using the same, and servo track writing system for the hard disk drive
    • 能够补偿倾斜的编码器,使用其的硬盘驱动器和用于硬盘驱动器的伺服轨迹写入系统
    • US08233357B2
    • 2012-07-31
    • US12816411
    • 2010-06-16
    • Chul-woo Lee
    • Chul-woo Lee
    • G11B11/00
    • G11B5/59633B82Y10/00G01D5/34715G01D5/34746G11B5/743
    • An encoder is capable of being used to compensate for the tilting of a movable object in an apparatus. The encoder includes a fixed scale, and a movable scale integrated with an object that moves during an operation of the apparatus and having a plurality of patterns that are out of phase from each other with respect to the direction of movement of the object. The encoder may be employed by a hard disk drive (HDD) and a servo track recording apparatus. The movable scale is integrated with an actuator arm of the HDD for positioning a read/write head of the HDD, and the fixed scale is fixed to the housing of the HDD. The servo track recording apparatus can use the encoder to record servo track information precisely on a disk.
    • 编码器能够用于补偿装置中可移动物体的倾斜。 所述编码器包括固定刻度,以及与所述物体集成的可移动刻度,所述可移动刻度在所述装置的操作期间移动,并且具有相对于所述物体的移动方向彼此异相的多个图案。 编码器可以由硬盘驱动器(HDD)和伺服记录记录装置使用。 移动刻度盘与HDD的执行器臂集成,用于定位HDD的读/写头,固定刻度尺固定在HDD的外壳上。 伺服记录装置可以使用编码器将伺服轨道信息精确地记录在盘上。