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    Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same
    21.
    发明授权
    Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same 失效

    公开(公告)号：US06987723B2

    公开(公告)日：2006-01-17

    申请号：US11081556

    申请日：2005-03-17

    申请人： Isao Ichimura ,  Kiyoshi Osato ,  Jun Nakano ,  Shin Masuhara

    发明人： Isao Ichimura ,  Kiyoshi Osato ,  Jun Nakano ,  Shin Masuhara

    IPC分类号： G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/24079 ,  G11B7/24082

    摘要： The present invention provides an optical recording medium and an optical disk device realizing prevention of crosswrite and uniformity of playback signals and capable of easily securing compatibility with a read only disk. It provides an optical recording medium on which light LB condensed by a lens (12, 14) having a numerical aperture of 0.85±0.1 and a wavelength of 405±5 nm is focused for recording or playback, having a substrate 1 formed with a groove 2 in its surface, an optical recording layer 3 formed on the substrate and having topography corresponding to the groove, and a light transmission type protection layer 4 formed on the optical recording layer; used when light for recording or playback is focused from the protection layer side to the optical recording layer; using as a recording area only the optical recording layer of one of a side far from the emitting side of the light for recording or playback, that is, a portion corresponding to a recessed portion of the topography, and a side close to it, that is, a portion corresponding to a projecting portion; having a track pitch of 0.32±0.01 μm; and having a depth D2 of a recessed portion with respect to a projecting portion in the range of 19 to 24 nm.

    Optical recording medium and a method of manufacturing the same
    22.
    发明授权
    Optical recording medium and a method of manufacturing the same 失效
    光记录介质及其制造方法

    公开(公告)号：US06967050B2

    公开(公告)日：2005-11-22

    申请号：US09731904

    申请日：2000-12-08

    申请人： Koichiro Kishima ,  Isao Ichimura ,  Kimihiro Saito ,  Kiyoshi Osato

    发明人： Koichiro Kishima ,  Isao Ichimura ,  Kimihiro Saito ,  Kiyoshi Osato

    IPC分类号： G11B7/007 ,  G11B7/24 ,  G11B7/243 ,  G11B7/2433 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2548 ,  G11B7/2578 ,  G11B7/2585 ,  G11B7/26 ,  B32B3/02

    CPC分类号： G11B7/2548 ,  B82Y10/00 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/24 ,  G11B7/2433 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2578 ,  G11B7/2585 ,  G11B7/26 ,  G11B2007/24304 ,  G11B2007/24328

    摘要： Constructed is an optical recording medium which is so formed as to have excellent surface flatness and with respect to which information is recorded or reproduced with the use of a near-field optical system. The optical recording medium is one which performs at least one of recording and reproduction of information by irradiation of light. The optical recording medium has a substrate 1 which has fine concavities and convexities 2 formed on the surface on a side where irradiation of light is performed, and a formed film layer having at least a recording layer and having a fine concavities and convexities surface reflecting the fine concavities and convexities 2 in itself. The optical recording medium also has a light transmission flattenable film 4 which is so formed on the formed film layer as to have the fine concavities and convexities surface buried therein, and the surface of which is polished and which has a single-layer or a multi-layer structure having a hardness enabling the film to be polished, has a transmission characteristic with respect to the irradiated light to thereby permits transmission of a light irradiated with respect to this optical recording medium.

    摘要翻译： 所构成的光记录介质形成为具有优异的表面平坦性，并且利用近场光学系统记录或再现信息。 光记录介质是通过照射光进行信息的记录和再现中的至少一种的记录介质。 光记录介质具有基板1，该基板1具有形成在进行光照射的一侧的表面上的细小凹凸2，以及形成有至少具有记录层且具有反射 细小的凹凸2本身。 光学记录介质还具有透光平坦化膜4，该透光平坦化膜4形成在所形成的膜层上，以便将细小的凹凸表面埋入其中，并且其表面被抛光并具有单层或多层 具有使膜能够被研磨的硬度的层结构相对于照射光具有透射特性，从而允许透射相对于该光记录介质照射的光。

    Optical disc recording and playback apparatus and signal detection method
    23.
    发明申请
    Optical disc recording and playback apparatus and signal detection method 失效
    光盘记录和播放装置及信号检测方法

    公开(公告)号：US20050226108A1

    公开(公告)日：2005-10-13

    申请号：US11092907

    申请日：2005-03-30

    申请人： Isao Ichimura

    发明人： Isao Ichimura

    IPC分类号： G11B7/005 ,  G11B7/00 ,  G11B7/007 ,  G11B7/09

    CPC分类号： G11B7/0053 ,  G11B7/00736 ,  G11B7/0901 ,  G11B7/0906

    摘要： An optical disc recording and playback apparatus includes an optical pickup performing an operation for recording and playing back signal information into and from an optical disc; an optical element allowing a light beam irradiated onto an optical disc by the optical pickup to be split into a main beam and sub-beams on both sides of the main beam and supplying the beams to the optical disc; an optical detector detecting return light from the optical disc; and a computation circuit detecting a track control error signal by a phase difference method and a differential push-pull method by using the detection signal from the optical detector and also detecting a wobble signal.

    摘要翻译： 光盘记录和重放装置包括执行用于将信号信息记录到光盘中并从光盘回放的操作的光学拾取器; 允许通过光学拾取器照射到光盘上的光束被分裂成主光束并且在主光束的两侧上的子光束并将光束提供给光盘的光学元件; 检测来自光盘的返回光的光学检测器; 以及通过使用来自光学检测器的检测信号并且还检测摆动信号的相位差法和差分推挽法检测轨道控制误差信号的计算电路。

    Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same
    25.
    发明申请
    Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same 失效
    具有高密度轨道间距的光记录介质和用于记录和重放的光盘驱动器

    公开(公告)号：US20050163033A1

    公开(公告)日：2005-07-28

    申请号：US11081555

    申请日：2005-03-17

    申请人： Isao Ichimura ,  Kiyoshi Osato ,  Jun Nakano ,  Shin Masuhara

    发明人： Isao Ichimura ,  Kiyoshi Osato ,  Jun Nakano ,  Shin Masuhara

    IPC分类号： G11B7/007 ,  G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/24079 ,  G11B7/24082

    摘要： The present invention provides an optical recording medium and an optical disk device realizing prevention of crosswrite and uniformity of playback signals and capable of easily securing compatibility with a read only disk. It provides an optical recording medium on which light LB condensed by a lens (12, 14) having a numerical aperture of 0.85±0.1 and a wavelength of 405±5 nm is focused for recording or playback, having a substrate 1 formed with a groove 2 in its surface, an optical recording layer 3 formed on the substrate and having topography corresponding to the groove, and a light transmission type protection layer 4 formed on the optical recording layer; used when light for recording or playback is focused from the protection layer side to the optical recording layer; using as a recording area only the optical recording layer of one of a side far from the emitting side of the light for recording or playback, that is, a portion corresponding to a recessed portion of the topography, and a side close to it, that is, a portion corresponding to a projecting portion; having a track pitch of 0.32±0.01 μm; and having a depth D2 of a recessed portion with respect to a projecting portion in the range of 19 to 24 nm.

    摘要翻译： 本发明提供了一种光学记录介质和光盘装置，其实现了防止重放信号的横向和均匀性并且能够容易地确保与只读盘的兼容性。 它提供了一种光学记录介质，其上聚焦有数字孔径为0.85±0.1和波长为405±5nm的透镜（12,14）的光LB用于记录或重放，其具有形成有凹槽 2，形成在基板上并且具有与凹槽对应的形貌的光学记录层3和形成在光学记录层上的透光型保护层4; 用于记录或重放的光从保护层侧聚焦到光学记录层; 仅使用远离用于记录或重放的光的发射侧的一侧的光记录层，即与形貌的凹陷部相对应的部分和靠近它的一侧的光记录层， 是对应于突出部分的部分; 轨道间距为0.32±0.01 mum; 相对于突出部的凹部的深度D 2在19〜24nm的范围内。

    Focus controlling apparatus and method, and optical disc drive
    26.
    发明授权
    Focus controlling apparatus and method, and optical disc drive 失效
    对焦控制装置和方法以及光盘驱动器

    公开(公告)号：US06674696B1

    公开(公告)日：2004-01-06

    申请号：US09049478

    申请日：1998-03-27

    申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

    发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

    IPC分类号： G11B700

    CPC分类号： G11B7/094 ,  G11B7/0909 ,  G11B2007/0006

    摘要： A focus controller for focusing a light beam and positioning the focused light beam onto a signal recording layer of a signal recording media is disclosed. The controller comprises a light beam focusing means having a numerical aperture of 0.6 or more; a focus controlling means for positioning the light beam focused by the light beam focusing means onto the signal recording layer of the recording media; and an offset adjusting means for adjusting an offset between the focused light beam positioned by the focus controlling means and the signal recording layer of the recording media. The controller positions the light beam focused by an objective lens onto the signal recording layer of a recording media; moves the objective lens within a predetermined optical-axial range, detects an amplitude of a signal read from the recording media at either end of the optical-axial range, and adjusts an offset between the focused light beam positioned by the objective lens and the signal recording layer, depending on a difference between the amplitudes of the detected reproduced signal.

    摘要翻译： 公开了一种用于聚焦光束并将聚焦的光束定位在信号记录介质的信号记录层上的聚焦控制器。 控制器包括数值孔径为0.6或更大的光束聚焦装置; 聚焦控制装置，用于将由光束聚焦装置聚焦的光束定位到记录介质的信号记录层上; 以及偏移调整装置，用于调节由聚焦控制装置定位的聚焦光束与记录介质的信号记录层之间的偏移。 控制器将由物镜聚焦的光束定位在记录介质的信号记录层上; 在预定的光轴范围内移动物镜，检测在光轴范围的任一端从记录介质读取的信号的幅度，并调整由物镜定位的聚焦光束与信号之间的偏移 记录层，取决于检测到的再现信号的振幅之差。

    Optical recording and reproducing apparatus and optical recording and reproducing method
    28.
    发明授权
    Optical recording and reproducing apparatus and optical recording and reproducing method 失效
    光学记录和再现装置以及光学记录和再现方法

    公开(公告)号：US06324133B1

    公开(公告)日：2001-11-27

    申请号：US09350293

    申请日：1999-07-09

    申请人： Isao Ichimura

    发明人： Isao Ichimura

    IPC分类号： G11B709

    CPC分类号： G11B7/0908 ,  G11B7/0927

    摘要： In order to carry out optimization adjustment of a distance between a first lens and a second lens and optimization adjustment of focus offset of two group object lenses in a short period of time, after focusing is operated, while the distance between the first lens and the second lens of the two group object lenses is being adjusted by a first electromagnetic actuator, the two group object lenses are integrally moved by a second electromagnetic actuator, an amplitude variation caused by spherical aberration and an amplitude variation caused by focus servo error which are produced in an RF signal S2 are separated by an envelope detection unit A33 and an envelope detection unit B34 and the two adjustments are carried out simultaneously.

    摘要翻译： 为了进行第一透镜和第二透镜之间的距离的优化调整，并且在短时间内对两组物体的聚焦偏移进行优化调整，在聚焦操作之后，在第一透镜和第二透镜之间的距离 通过第一电磁致动器调整两组物体的第二透镜，通过第二电磁致动器将两组物镜整体移动，由球面像差引起的振幅变化和由聚焦伺服误差引起的振幅变化 RF信号S2由包络检测单元A33和包络检测单元B34分开，并且同时进行两个调整。

    Optical recording medium recording and reproducing apparatus and optical pickup device
    29.
    发明授权
    Optical recording medium recording and reproducing apparatus and optical pickup device 失效
    光记录介质记录和再现装置和光学拾取装置

    公开(公告)号：US06005834A

    公开(公告)日：1999-12-21

    申请号：US813346

    申请日：1997-03-07

    申请人： Fumisada Maeda ,  Toshio Watanabe ,  Isao Ichimura ,  Atsushi Fukumoto ,  Kenji Yamamoto ,  Kiyoshi Ohsato

    发明人： Fumisada Maeda ,  Toshio Watanabe ,  Isao Ichimura ,  Atsushi Fukumoto ,  Kenji Yamamoto ,  Kiyoshi Ohsato

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135

    CPC分类号： G11B7/1372 ,  G11B7/0935 ,  G11B7/093

    摘要： An optical recording medium recording and reproducing apparatus for recording information on an optical recording medium and/or reproducing information therefrom by irradiating the optical recording medium with laser light by the use of a two-group objective lens composed of at least first and second lenses. This apparatus is provided with: a light source for emitting laser light; a first lens for converging laser light emitted from the light source; a second lens interposed between the first lens and the optical recording medium; a detecting unit for detecting a kind of the recording medium; and a movement unit for changing the distance in the direction of an optical axis between the first and second lenses by causing a relative movement between the first and second lenses. Further, the distance between the first and second lenses is changed by the movement unit, which causes the second lens to move, according to a result of a detection, which is performed by the detecting unit. Thereby, the numerical aperture NA of the objective lens is increased. Moreover, the influence of aberration is mitigated. Consequently, the high-density recording and reproducing of information signals can be achieved.

    摘要翻译： 一种用于通过使用由至少第一和第二透镜组成的两组物镜通过用激光照射光学记录介质来在光学记录介质上记录信息和/或再现信息的光学记录介质记录和再现装置。 该装置具有：用于发射激光的光源; 用于会聚从光源发射的激光的第一透镜; 插入在第一透镜和光记录介质之间的第二透镜; 检测单元，用于检测记录介质的种类; 以及移动单元，用于通过使第一和第二透镜之间的相对运动来改变在第一和第二透镜之间的光轴方向上的距离。 此外，根据由检测单元执行的检测结果，第一透镜和第二透镜之间的距离被移动单元改变，这导致第二透镜移动。 由此，物镜的数值孔径NA增大。 此外，减轻了像差的影响。 因此，可以实现信息信号的高密度记录和再现。

    Optical pick-up device
    30.
    发明授权
    Optical pick-up device 失效
    光学拾取装置

    公开(公告)号：US5712842A

    公开(公告)日：1998-01-27

    申请号：US744007

    申请日：1996-02-12

    申请人： Kenji Yamamoto ,  Fumisada Maeda ,  Isao Ichimura ,  Kiyoshi Ohsato ,  Toshio Watanabe

    发明人： Kenji Yamamoto ,  Fumisada Maeda ,  Isao Ichimura ,  Kiyoshi Ohsato ,  Toshio Watanabe

    IPC分类号： G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/00

    CPC分类号： B82Y10/00 ,  G11B7/1374 ,  G11B7/13927 ,  G11B7/0908

    摘要： There is provided an optical pick-up device capable of eliminating a spherical aberration due to a thickness error of an optical disc. The optical pick-up device includes a convex lens having a flat surface opposed to a surface of an optical recording medium, and having a predetermined refractive index, and an objective lens disposed such that the convex lens is interposed between said optical recording medium and the objective lens. A position-detecting means detects a position relation between the light-incident surface of the optical recording medium and the flat surface of the convex lens, based on first and second detection signals. A drive means drives the convex lens along an optical axis thereof such that the convex lens is caused to move in the opposite directions toward the optical recording medium or the objective lens, whereby a distance between the light-incident surface of the optical recording medium and the flat surface of the convex lens is controlled based on the first and second detection signals.

    摘要翻译： 提供了能够消除由于光盘的厚度误差引起的球面像差的光学拾取装置。 光学拾取装置包括具有与光学记录介质的表面相对的平坦表面并具有预定折射率的凸透镜，并且设置为使得凸透镜插入在所述光学记录介质和 物镜。 位置检测装置基于第一和第二检测信号检测光记录介质的光入射表面和凸透镜的平坦表面之间的位置关系。 驱动装置沿其光轴驱动凸透镜，使得凸透镜沿相反方向朝向光记录介质或物镜移动，由此光记录介质的光入射表面与 基于第一和第二检测信号来控制凸透镜的平坦表面。