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    Information reproducing method and information reproducing apparatus of multilayer optical disk
    1.
    发明授权
    Information reproducing method and information reproducing apparatus of multilayer optical disk 有权
    多层光盘的信息再现方法和信息再现装置

    公开(公告)号：US07123565B2

    公开(公告)日：2006-10-17

    申请号：US10368415

    申请日：2003-02-20

    申请人： Tetsuo Ariyoshi ,  Takeshi Shimano ,  Harukazu Miyamoto

    发明人： Tetsuo Ariyoshi ,  Takeshi Shimano ,  Harukazu Miyamoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/08505 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/095 ,  G11B7/131 ,  G11B7/1365 ,  G11B2007/0013

    摘要： When reproducing a multilayer optical disk using a high-numerical-aperture objective, the period of time required before the disk is reproduced is reduced by discriminating recording layers. A spherical aberration signal is detected as a differential signal between focus position fluctuation signals respectively in a central section and in a peripheral section of a reproduced flux of light. A recording layer is discriminated using a quantity of correction of spherical aberration at a zero-crossing point of a level or a spherical aberration signal associated with the differential signal. After adding the spherical aberration for the correction of the discriminated layer, residual spherical aberration is corrected by feedback control using a residual spherical aberration signal.

    摘要翻译： 当使用高数值孔径物镜再现多层光盘时，通过识别记录层来减少盘再生之前所需的时间。 球面像差信号被分别作为中心部分的焦点位置波动信号与再生光束的周边部分之间的差分信号进行检测。 使用在与差分信号相关联的电平或球面像差信号的过零点处的球面像差校正量来区分记录层。 在添加用于鉴别层的校正的球面像差之后，通过使用残余球面像差信号的反馈控制来校正残留球差。

    Objective lens optical system, optical head and optical information reproduction apparatus
    3.
    发明授权
    Objective lens optical system, optical head and optical information reproduction apparatus 失效
    物镜光学系统，光头和光信息再生装置

    公开(公告)号：US06791934B2

    公开(公告)日：2004-09-14

    申请号：US10076663

    申请日：2002-02-19

    申请人： Takeshi Shimano ,  Tetsuo Ariyoshi ,  Kazuo Shigematsu ,  Koichi Maruyama ,  Shuichi Takeuchi

    发明人： Takeshi Shimano ,  Tetsuo Ariyoshi ,  Kazuo Shigematsu ,  Koichi Maruyama ,  Shuichi Takeuchi

    IPC分类号： G11B700

    CPC分类号： G11B7/1378 ,  G11B7/093 ,  G11B7/0935 ,  G11B7/0943 ,  G11B7/13927

    摘要： When it is intended to realize a lens having a large NA with one lens, an adjustment precision between both surfaces of the lens is very strict. Accordingly an objective lens having an NA of 0.8 or more was usually realized by two lenses. However, a working distance is small, and collision of the objective lens with a disc is apt to occur. A coma corrector for compensating coma caused by decentering of both surfaces in realizing the high NA lens with one lens is added. However, in this case, astigmatism occurs when the objective lens decenters from the coma corrector relatively accompanied with a tracking operation. The objective lens and the coma corrector are fixed to a mirror barrel so as to be unified with each other, and driven by a two-dimensional lens actuator. With such a constitution, decentering of the objective lens and the coma corrector does not occur, and hence astigmatism does not occur.

    摘要翻译： 当想要实现具有一个透镜的具有大NA的透镜时，透镜的两个表面之间的调节精度非常严格。 因此，通常通过两个透镜实现NA为0.8以上的物镜。 然而，工作距离小，容易发生物镜与盘的碰撞。 添加了一个用于补偿由两个表面偏心造成的实现具有一个透镜的高NA透镜的昏迷校正器。 然而，在这种情况下，当物镜相对于跟踪操作相对于昏迷校正器偏离时，发生散光。 物镜和彗差校正器被固定到镜筒上，以便彼此一体化，并由二维透镜致动器驱动。 通过这样的结构，不会发生物镜和昏迷校正器的偏心，因此不发生散光。

    Optical disk medium
    4.
    发明授权
    Optical disk medium 有权
    光盘介质

    公开(公告)号：US06524766B1

    公开(公告)日：2003-02-25

    申请号：US09650728

    申请日：2000-08-30

    申请人： Tetsuo Ariyoshi ,  Motoyasu Terao ,  Takeshi Shimano ,  Toshimichi Shintani

    发明人： Tetsuo Ariyoshi ,  Motoyasu Terao ,  Takeshi Shimano ,  Toshimichi Shintani

    IPC分类号： G11B724

    CPC分类号： B82Y10/00 ,  G11B7/24 ,  G11B7/243 ,  G11B7/253 ,  G11B7/2534 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595 ,  G11B2007/24306 ,  G11B2007/2432 ,  G11B2007/2571 ,  G11B2007/25713 ,  Y10S430/146

    摘要： The optical disk medium permits an increase in recording density using a complex refractive index variation of an inorganic oxide film in a super-resolution medium using an inorganic oxide film. The reflectance of the disk increases due to the complex refractive index variation of the inorganic oxide film. Specifically, in the case where the inorganic oxide film is an oxide film comprising Co, a reflect addition film is provided. The effective spot diameter used for read-out is reduced, thereby increasing recording density. By using a material for which the complex refractive index varies sharply, the recording density can be approximately doubled.

    摘要翻译： 光盘介质允许使用无机氧化物膜的超分辨率介质中的无机氧化物膜的复折射率变化来提高记录密度。 由于无机氧化物膜的复合折射率变化，盘的反射率增加。 具体地，在无机氧化物膜是包含Co的氧化膜的情况下，提供反射加成膜。 用于读出的有效光斑直径减小，从而增加记录密度。 通过使用复合折射率急剧变化的材料，记录密度可以大致加倍。

    Optical head and optical disk apparatus
    5.
    发明授权
    Optical head and optical disk apparatus 失效
    光头和光盘装置

    公开(公告)号：US06807133B2

    公开(公告)日：2004-10-19

    申请号：US09921142

    申请日：2001-08-03

    申请人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    发明人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    IPC分类号： G11B700

    CPC分类号： G11B7/1353 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/0956 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

    摘要： To stably carry out recording and reproducing to and from a high density optical disk without using a double servo in the optical disk using a high NA objective lens. A detection of a spherical aberration and a detection of a coma aberration in a radial direction are simultaneously performed, and the coma aberration generated with the offset of an objective lens 109 is corrected in real time, thus enlarging an allowable offset amount of the objective lens. In order to simultaneously detect the spherical aberration and the coma aberration, focal shift and tracking shift signals in an inside region and outside region of reflected light flux are detected respectively, and the differential signals are set as spherical aberration and coma aberration signals.

    摘要翻译： 为了在不使用高NA物镜的光盘中不使用双重伺服的情况下稳定地向高密度光盘执行记录和再现。 同时执行球面像差的检测和径向的彗形像差的检测，并且实时地修正由物镜109的偏移产生的彗形像差，从而扩大物镜的容许偏移量 。 为了同时检测球面像差和彗形像差，分别检测反射光束的内部区域和外部区域中的焦点偏移和跟踪偏移信号，并将差分信号设置为球面像差和彗形像差信号。

    Optical head and optical disk apparatus
    7.
    发明申请
    Optical head and optical disk apparatus 失效
    光头和光盘装置

    公开(公告)号：US20050025000A1

    公开(公告)日：2005-02-03

    申请号：US10934384

    申请日：2004-09-07

    申请人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    发明人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    IPC分类号： G11B7/095 ,  G11B7/00 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/1353 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/0956 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

    摘要： To stably carry out recording and reproducing to and from a high density optical disk without using a double servo in the optical disk using a high NA objective lens. A detection of a spherical aberration and a detection of a coma aberration in a radial direction are simultaneously performed, and the coma aberration generated with the offset of an objective lens 109 is corrected in real time, thus enlarging an allowable offset amount of the objective lens. In order to simultaneously detect the spherical aberration and the coma aberration, focal shift and tracking shift signals in an inside region and outside region of reflected light flux are detected respectively, and the differential signals are set as spherical aberration and coma aberration signals.

    摘要翻译： 为了在不使用高NA物镜的光盘中不使用双重伺服的情况下稳定地向高密度光盘执行记录和再现。 同时执行球面像差的检测和径向的彗形像差的检测，并且实时地修正由物镜109的偏移产生的彗形像差，从而扩大物镜的容许偏移量 。 为了同时检测球面像差和彗形像差，分别检测反射光束的内部区域和外部区域中的焦点偏移和跟踪偏移信号，并将差分信号设置为球面像差和彗形像差信号。

    Optical information recording/reproducing apparatus, and optical head apparatus
    8.
    发明授权
    Optical information recording/reproducing apparatus, and optical head apparatus 失效

    公开(公告)号：US06563099B2

    公开(公告)日：2003-05-13

    申请号：US09925311

    申请日：2001-08-10

    申请人： Shigeharu Kimura ,  Takeshi Shimano ,  Tetsuo Ariyoshi

    发明人： Shigeharu Kimura ,  Takeshi Shimano ,  Tetsuo Ariyoshi

    IPC分类号： G02B2740

    CPC分类号： G11B7/131 ,  G11B7/0916 ,  G11B7/1381 ,  G11B2007/0013

    摘要： To reduce an effect of reflected light from a layer (or layers) other than a layer to be read upon focus position control when reading a multilayer optical disk in an optical disk drive. In an optical system where a focus error signal is generated by the knife edge method, a photodetector 53 that is divided into four parts is used. Each of two pairs of light detecting elements on the right or left side are formed by division of a detection plane of the photodetector such that the reflected light from a neighboring layer falls half-and-half on that pair of the light detecting elements. Signals from the photodetector are given with alternating polarities in such a way that any adjacent light detecting elements have mutually different polarities and are added up together to form the focus error signal.