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    • 1. 发明授权
    • Optical pickup device and optical disk device using the same
    • 光拾取装置和使用其的光盘装置
    • US08184509B2
    • 2012-05-22
    • US12760592
    • 2010-04-15
    • Toshiteru NakamuraNobuo NakaiShigeharu Kimura
    • Toshiteru NakamuraNobuo NakaiShigeharu Kimura
    • G11B7/00G11B27/36G11B7/135
    • G11B7/1381G11B7/0906G11B7/094G11B7/0943G11B7/133G11B2007/0013
    • Of the beams reflected by an optical disk, only peripheral beams excluding the push-pull region are used to generate a DPD signal in order to optimize internal wire connections among the light receiving areas of the optical detector and thereby reduce the amplification factor of the lens error signal, required for generating the tracking error signal of the DPP method. A beam reflected from a multilayered optical disk is divided into some beam diffraction areas. The divided beam diffraction areas and the light receiving areas are so arranged that the divided beams focus at different positions on the optical detector and that, when a beam is focused on a target recording layer of the disk, stray light from other than the target recording layer being reproduced does not enter into the servo signal light receiving area of the optical detector.
    • 在由光盘反射的光束中,仅使用不包括推挽区域的外围光束来产生DPD信号,以便优化光学检测器的光接收区域之间的内部线路连接,从而降低透镜的放大系数 产生DPP方法的跟踪误差信号所需的误差信号。 从多层光盘反射的光束被分成一些光束衍射区域。 分割光束衍射区域和光接收区域被布置成使得分光束聚焦在光学检测器上的不同位置处,并且当光束聚焦在盘的目标记录层上时,来自除目标记录之外的杂散光 被再现的层不进入光学检测器的伺服信号光接收区域。
    • 2. 发明授权
    • Apparatus for and method of measuring boundary surface
    • 测量边界面的仪器和方法
    • US4767211A
    • 1988-08-30
    • US088538
    • 1987-08-20
    • Chusuke MunakataShinobu HaseShigeharu Kimura
    • Chusuke MunakataShinobu HaseShigeharu Kimura
    • G01B11/00G01B11/24G01B11/30
    • G01B11/24
    • An apparatus for and a method of measuring a boundary surface of a sample are disclosed in which a ratio of the light quantity of a part of reflected light from a sample which travels in the vicinity of the optical axis of the reflected light, to the light quantity of another part of the reflected light which is directed to a position deviating from the optical axis by a predetermined distance is used to accurately measure a boundary surface of a sample. Since the accuracy of measurement is increased by using the above ratio, light capable of passing through the sample can be used as incident light. Thus, a deep hole in the surface of the sample and a void such as an air bubble in a living being sample, which cannot be measured by the prior art, can be measured very accurately.
    • 公开了一种测量样品的边界面的装置和方法,其中,来自在反射光的光轴附近行进的样品的反射光的一部分的光量与光 使用被引导到偏离光轴的位置预定距离的反射光的另一部分的量来准确地测量样品的边界面。 由于通过使用上述比例来提高测量精度,所以可以使用能够通过样品的光作为入射光。 因此,可以非常精确地测量样品表面中的深孔和活体样品中的诸如气泡之类的空隙,这是现有技术无法测量的。
    • 4. 发明授权
    • Optical pickup device
    • 光学拾取装置
    • US08165004B2
    • 2012-04-24
    • US12898750
    • 2010-10-06
    • Shigeharu Kimura
    • Shigeharu Kimura
    • G11B7/00
    • G11B7/1362G11B7/0903G11B7/1353G11B7/1356G11B2007/0013
    • An optical pickup device capable of eliminating interlayer crosstalk which is responsible for fluctuation in control signals and error rate in data signals, thereby ensuring stable action for a multilayered recording disc with a narrow interlayer spacing. The reflected beam coming from the multilayered disc is divided along the central line into two parallel portions by the dividing optical system and then condensed. The reflected beam coming from the active layer, which has been condensed, is reflected by the reflecting plane whose reflecting region is limited and the thus reflected beam is detected by the optical detector. The reflected beam coming from other layers is not reflected by the reflecting plane, so that interlayer crosstalk is reduced.
    • 一种能够消除层间串扰的光拾取装置,其负责控制信号的波动和数据信号中的错误率,从而确保具有窄层间距的多层记录盘的稳定动作。 来自多层盘的反射光束通过分光光学系统沿着中心线分成两个平行部分,然后冷凝。 来自已被冷凝的有源层的反射光束被其反射区域受限的反射面反射,由光检测器检测出反射光束。 来自其它层的反射光束不被反射面反射,从而降低了层间串扰。
    • 6. 发明申请
    • OPTICAL DISC DRIVE APPARATUS
    • 光盘驱动器
    • US20070268807A1
    • 2007-11-22
    • US11669223
    • 2007-01-31
    • Shigeharu KimuraTakeshi Shimano
    • Shigeharu KimuraTakeshi Shimano
    • G11B7/00
    • G11B7/1367G11B7/131G11B7/1362G11B7/1381G11B7/1392G11B2007/0013
    • The amount of reflected light from an adjacent layer in a multilayer optical disc is reduced by means of a combination of half-wave plates having different optical axes and a flat mirror. The polarization direction of the reflected light from a target layer is changed without changing the polarization direction of reflected light from the adjacent layer so as to detect a signal from the target layer alone. Because no stray light is introduced into the tracking error signal or focus signal, the laser light irradiated position can be controlled with high accuracy. This makes it possible to accurately determine the laser irradiated position during reading and writing, thereby enhancing signal quality. Because no reflected light from the adjacent layer is introduced into the data signal, a data signal with reduced error can be obtained.
    • 通过具有不同光轴的半波片和平面镜的组合来减少来自多层光盘中的相邻层的反射光的量。 改变来自目标层的反射光的偏振方向,而不改变来自相邻层的反射光的偏振方向,从而仅检测来自目标层的信号。 由于没有杂散光被引入到跟踪误差信号或聚焦信号中,因此可以高精度地控制激光照射位置。 这使得可以在读取和写入期间准确地确定激光照射位置,从而提高信号质量。 由于没有将来自相邻层的反射光引入到数据信号中,所以可以获得具有减小的误差的数据信号。
    • 10. 发明授权
    • Optical pickup device and optical disc apparatus using same
    • 光拾取装置和使用其的光盘装置
    • US08270281B2
    • 2012-09-18
    • US12956135
    • 2010-11-30
    • Toshiteru NakamuraNobuo NakaiShigeharu Kimura
    • Toshiteru NakamuraNobuo NakaiShigeharu Kimura
    • G11B7/00G11B27/36G11B20/18G11B7/135
    • G11B7/1365G11B7/0906G11B7/0912G11B7/0916G11B7/0943G11B7/1353G11B7/13925
    • According to the present invention, of all beams of light reflected from the optical disc, only light in a peripheral region excluding a push-pull region is used to generate a DPD signal. In this method of signal generation that optimizes internal light-receiving surface interconnections in a photodetector, the lens error signal required for the generation of a tracking error signal in the DPP scheme is amplified at a lower amplification factor. In addition, the light reflected from the multilayered optical disc will be divided into a plurality of regions and the divided beam of light will be focused at different positions on the photodetector. When the beam is focused upon a desired layer, stray light from recording layers other than those to be subjected to information reproduction will not enter the photodetector light-receiving surfaces used for servo signals.
    • 根据本发明,从光盘反射的所有光束中,仅使用除了推挽区域以外的周边区域的光来产生DPD信号。 在这种优化光电检测器内的光接收表面互连的信号产生方法中,DPP方案中产生跟踪误差信号所需的透镜误差信号以较低的放大系数被放大。 此外,从多层光盘反射的光将被划分为多个区域,并且分割的光束将聚焦在光电检测器上的不同位置。 当光束聚焦在期望的层上时,来自记录层的杂散光不会进行信息再现,不会进入用于伺服信号的光电检测器光接收表面。