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    INFORMATION RECORDING MEDIUM AND OPTICAL DISC APPARATUS
    45.
    发明申请
    INFORMATION RECORDING MEDIUM AND OPTICAL DISC APPARATUS 审中-公开
    信息记录媒体和光盘设备

    公开(公告)号：US20070058516A1

    公开(公告)日：2007-03-15

    申请号：US11469608

    申请日：2006-09-01

    Applicant: Kazuo Watabe ,  Yasuaki Ootera ,  Nobuhisa Yoshida ,  Naomasa Nakamura

    Inventor： Kazuo Watabe ,  Yasuaki Ootera ,  Nobuhisa Yoshida ,  Naomasa Nakamura

    IPC: G11B7/00 ,  G11B3/70

    CPC classification number: G11B7/24038

    Abstract: An embodiment of the invention, an information recording medium has a first recording layer, a second recording layer which is provided with respect to the first recording layer through a first space layer with a first thickness, a third recording layer which is provided with respect to the second recording layer through a second space layer whose thickness is different from the first space layer and is set to a predetermined magnitude with respect to the thickness of the first space layer, a first substrate which supports the first recording layer, and a second substrate which supports the third recording layer, and it is possible to manufacture with high productivity an information recording medium having three or more recording layers hard to cause interlayer crosstalk.

    Abstract translation: 本发明的实施例中，信息记录介质具有第一记录层，通过具有第一厚度的第一空间层相对于第一记录层设置的第二记录层，相对于第一记录层设置的第三记录层 所述第二记录层通过第二空间层，所述第二空间层的厚度与所述第一空间层不同，并且相对于所述第一空间层的厚度被设定为预定的大小;第一基板，其支撑所述第一记录层;以及第二基板 其支持第三记录层，并且可以以高生产率制造具有三层或更多层难以引起层间串扰的记录层的信息记录介质。

    Optical head and optical disc apparatus
    47.
    发明申请
    Optical head and optical disc apparatus 审中-公开
    光头和光盘装置

    公开(公告)号：US20070002704A1

    公开(公告)日：2007-01-04

    申请号：US11479738

    申请日：2006-06-30

    Applicant: Sumitaka Maruyama ,  Kazuo Watabe ,  Nobuaki Kaji ,  Akihito Ogawa

    Inventor： Sumitaka Maruyama ,  Kazuo Watabe ,  Nobuaki Kaji ,  Akihito Ogawa

    IPC: G11B7/00

    CPC classification number: G11B7/1381 ,  G11B7/0903 ,  G11B7/0906 ,  G11B7/1353 ,  G11B2007/0006

    Abstract: To improve the quality of a tracking error signal when reproducing information recorded in an optical disc having tracks with two or more different pitches, using a diffraction element which is given a diffraction pattern configured to provide diffracted rays on the light-receiving surface of a photodetector which receives a reflected laser beam reflected on the recording layer of an optical disc and outputs a corresponding signal, to use diffracted rays generated according to pitches of optical tracks of an optical disc having different track pitches by switching to a predetermined combination in each of a phase different detection method (DPD) and a push pull method (PP).

    Abstract translation: 为了提高跟踪误差信号的质量，当再现记录在具有两个或多个不同间距的轨道的光盘中的信息时，使用衍射元件，该衍射元件被配置为在光电检测器的光接收表面上提供衍射光线 其接收在光盘的记录层上反射的反射激光束，并输出相应的信号，以使用通过切换到具有不同轨道间距的光盘的光轨的光轨的间距产生的衍射光线 相位不同检测方法（DPD）和推拉法（PP）。

    Optical head unit and optical disc apparatus
    48.
    发明申请
    Optical head unit and optical disc apparatus 审中-公开
    光头单元和光盘装置

    公开(公告)号：US20060262708A1

    公开(公告)日：2006-11-23

    申请号：US11434870

    申请日：2006-05-17

    Applicant: Kazuo Watabe ,  Sumitaka Maruyama ,  Hideaki Okano

    Inventor： Kazuo Watabe ,  Sumitaka Maruyama ,  Hideaki Okano

    IPC: G11B7/135

    CPC classification number: G11B7/1381 ,  G11B7/0912 ,  G11B7/0916 ,  G11B7/1275 ,  G11B7/1353 ,  G11B2007/0006

    Abstract: An optical head unit according to an embodiment of the invention includes a diffraction element which has a diffraction pattern capable of outputting a non-diffraction component, ±1st diffraction components, and an electric signal corresponding to the non-diffraction component, to the light-receiving surface of a photodetector which receives a reflected laser beam reflected on a recording layer of an optical disc and outputs a corresponding signal, as an signal at least for reproducing information recorded on the optical disc, and capable of outputting electric signals corresponding to the ±1st diffraction components for generating a focus error signal by a spot size method. The ratio of a component output as a non-diffraction component is increased to higher than the ratio of components output as ±1st diffraction components, and the signal to noise ratio of a reproduces signal is improved.

    Abstract translation: 根据本发明的实施例的光学头单元包括衍射元件，该衍射元件具有能够输出非衍射分量的衍射图案，±1 衍射分量，以及与非衍射分量相对应的电信号 将衍射分量传送到接收在光盘的记录层上反射的反射激光束的光电检测器的光接收表面，并输出相应的信号，作为至少用于再现记录在光盘上的信息的信号，并且能够 输出与±1 衍射分量对应的电信号，以通过点尺寸方法产生聚焦误差信号。 作为非衍射分量的分量输出的比率增加到高于作为±1 的衍射分量输出的分量的比率，并且改善了再现信号的信噪比。

    Optical disk apparatus
    49.
    发明授权
    Optical disk apparatus 有权
    光盘装置

    公开(公告)号：US06388964B2

    公开(公告)日：2002-05-14

    申请号：US09861544

    申请日：2001-05-22

    Applicant: Kazuo Watabe

    Inventor： Kazuo Watabe

    IPC: G11B700

    CPC classification number: G11B7/0901 ,  G11B7/005 ,  G11B7/24085

    Abstract: An optical disk apparatus comprising a light source for emitting a light beam, an optical system for focusing the light beam to form a beam spot on the optical disk, a tracking unit for detecting the light reflected from the optical disk to generate a tracking error signal from the light by a differential phase detection method, and move the beam spot in accordance with the tracking error signal, and an information-readout section for reading out information from the optical disk. To achieve readout compatibility between a high-definition DVD and a DVD-ROM, a predetermined delay is given relatively to first and second signals obtained from two pairs of regions arranged in two crossing diagonals of a quadrant photodetector, thereby shifting the beam spot from the centerline of the pit stream in the radial direction of a DVD-ROM, in order to read out information from the DVD-ROM.

    Abstract translation: 一种光盘装置，包括用于发射光束的光源，用于聚焦光束以在光盘上形成光斑的光学系统，用于检测从光盘反射的光以产生跟踪误差信号的跟踪单元 通过差分相位检测方法从光照射，并根据跟踪误差信号移动束斑;以及信息读出部，用于从光盘读出信息。 为了实现高分辨率DVD和DVD-ROM之间的读出兼容性，相对于从配置在象限光检测器的两个交叉对角线中的两对区域获得的第一和第二信号给出预定的延迟，从而将波束点从 DVD-ROM的径向方向上的凹坑流的中心线，以便从DVD-ROM中读出信息。

    Optical disk apparatus for reproducing information by shifting the light beam position away from the center line of the prepit arrays of an optical disk
    50.
    发明授权
    Optical disk apparatus for reproducing information by shifting the light beam position away from the center line of the prepit arrays of an optical disk 有权
    光盘装置，用于通过将光束位置偏离光盘的预制凹坑阵列的中心线来再现信息

    公开(公告)号：US06292446B1

    公开(公告)日：2001-09-18

    申请号：US09272169

    申请日：1999-03-18

    Applicant: Kazuo Watabe

    Inventor： Kazuo Watabe

    IPC: G11B700

    CPC classification number: G11B7/00718 ,  G11B7/005 ,  G11B7/00745

    Abstract: An optical disk apparatus is capable of reproducing information from an optical disk 10. The optical disk apparatus mainly includes an illuminating unit which is formed from a semiconductor laser 14, a collimator lens 15, a polarization light beam splitter (PBS) 16 and a -quarter-wave plate 17, as well as an objective lens 18, that focuses a light beam onto the optical disk 10; a two-segment split photo detector 21 which detects the light beam reflected by the optical disk 10; and a signal processing circuit 27 which processes a signal obtained by the two-segment split photo detector 21 to output a signal for reproduction. Here, the optical disk 10 has a recording region on which recording information can be stored along a first line and a header field on which reproducible information is stored along a second line, the second line being shifted from the first line a predetermined distance, the illuminating unit focusing the light beam along the first line, and the two-segment split photo detector 21 having two detecting areas 22a and 22b on opposite sides of a line parallel to the reflected image of the first line position. The signal processing circuit 27 is capable of processing a difference and a sum signal by using values detected in the detecting areas 22a and 22b, and it outputs one of those to serve as a playback signal reflecting a characteristic of the optical disk 10.

    Abstract translation: 光盘装置能够从光盘10再现信息。光盘装置主要包括由半导体激光器14，准直透镜15，偏振光分束器（PBS）16和“ CUSTOM-CHARACTER FILE =“US06292446-20010918-P00900.TIF”ID =“CUSTOM-CHARACTER-00001”> - 四分之一波片17以及将光束聚焦到光盘10上的物镜18; 检测由光盘10反射的光束的两段分割光电检测器21; 以及信号处理电路27，处理由两段分割光检测器21获得的信号，以输出用于再现的信号。 这里，光盘10具有记录区域，其上沿着第一行存储记录信息，沿着第二行存储可再现信息的标题字段，第二行从第一行移位预定距离， 照明单元沿着第一线聚焦光束，并且两段分割光电检测器21在平行于第一线位置的反射图像的线的相对侧上具有两个检测区域22a和22b。 信号处理电路27能够通过使用在检测区域22a和22b中检测的值来处理差分和和信号，并且输出其中的一个作为反映光盘10的特性的重放信号。

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