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    • 4. 发明申请
    • OPTICAL PICKUP
    • US20110182159A1
    • 2011-07-28
    • US12956155
    • 2010-11-30
    • Hiromi KITATomoto KawamuraToshiteru Nakamura
    • Hiromi KITATomoto KawamuraToshiteru Nakamura
    • G11B7/135
    • G11B21/106G11B7/0906G11B7/0916G11B7/131G11B7/1353G11B2007/0013
    • An optical pickup includes a light source, an objective lens, a diffraction grating that divides an optical beam reflected from a predetermined information layer, into a plurality of optical beams, and a detector having a plurality of photo-receivers to receive a plurality of optical beams. The diffraction grating has a predetermined region for dividing from a signal light beam a region including a central portion of a spot which the signal light beam will form on the diffraction grating. A distance from a central section of the detector to that of a spot center photo-receiver on the detector, the spot center photo-receiver being provided to receive the optical beams formed by division in a predetermined region of the diffraction grating, is equal to or greater than a spot radius of the unwanted light beams entering the predetermined region of the diffraction grating, on the detector.
    • 光拾取器包括光源,物镜,将从预定信息层反射的光束划分成多个光束的衍射光栅,以及具有多个光接收器的检测器,以接收多个光学 梁。 衍射光栅具有用于从信号光束分离包括信号光束将在衍射光栅上形成的点的中心部分的区域的预定区域。 从检测器的中心部分到检测器上的光点中心光电接收器的距离,被设置成接收由衍射光栅的预定区域划分的光束的光点中心光电接收器等于 或大于在检测器上进入衍射光栅的预定区域的不想要的光束的光点半径。
    • 9. 发明授权
    • Disk drive
    • 磁盘驱动器
    • US07110221B2
    • 2006-09-19
    • US10856943
    • 2004-06-01
    • Hideki KuwajimaHiromi KitaShigeo Obata
    • Hideki KuwajimaHiromi KitaShigeo Obata
    • G11B5/54G11B21/22
    • G11B5/4813G11B5/54
    • An actuator gripping device which prevents the actuator of the head support device from serious trouble such as damage to the surface of the recording medium due to external shocks. An actuator 7 comprises actuator sub-unit 27 having a tab 8 at one end and provided with a head 9, and a voice coil 10 mounted at the other end, a pivot pedestal 30 with a pair of abutments, and a spring plate 28 having an activating force to push the head 9 toward the recording medium 4, and that the actuator gripping device for gripping the actuator 7 comprises a ramp 14 formed with the first stepped side surface 14d and the second stepped side surface 14f having a specified angle respectively at either side of the second plane 14e on which the tab 8 is abutted at the shunt position in stop mode of the recording medium 4.
    • 一种致动器夹持装置,其防止头部支撑装置的致动器严重的故障,例如由于外部冲击而损坏记录介质的表面。 致动器7包括致动器子单元27,该致动器子单元27在一端具有一个接头8,并具有头部9,另一端安装有音圈10,具有一对邻接点的枢轴座30以及具有 用于将头部9推向记录介质4的激活力,并且用于夹持致动器7的致动器夹持装置包括形成有第一阶梯侧表面14d的斜面14和具有指定角度的第二阶梯侧面14f 分别在第二平面14e的任一侧上,突片8在记录介质4的停止模式下与分流位置抵接。