公开(公告)号：US6026064A

公开(公告)日：2000-02-15

申请号：US928301

申请日：1997-09-12

申请人： Haruhiko Izumi ,  Tadashi Sato ,  Takayuki Kawabe

发明人： Haruhiko Izumi ,  Tadashi Sato ,  Takayuki Kawabe

IPC分类号： G11B21/02 ,  G11B7/085 ,  G11B7/09 ,  G11B11/105 ,  H02K41/035

CPC分类号： G11B7/0925 ,  G11B7/08582 ,  H02K41/035 ,  G11B11/10571

摘要： A head driving apparatus has two yokes each having two generally parallel members which extend respectively in the direction generally perpendicular to the optical axis of a lens, and the yokes are disposed on both sides of the two side surfaces of the head. Two tubular head driving coils are fixed to the head and externally fitted on the member of each yoke, which is nearer to the head. At least a first magnet is fixed to the member of each yoke lying further from the head. A plurality of second magnets are fixed to the head and oppose the first magnets. The head is supported in a non-contact state by the repulsive forces of the first magnets and the second magnets, and the head is driven by energizing the head driving coils. An optical disk apparatus is equipped with the head driving apparatus.

摘要翻译： 头驱动装置具有两个轭，每个轭具有两个大致平行的构件，它们分别沿着大致垂直于透镜的光轴的方向延伸，并且轭设置在头的两个侧表面的两侧。 两个管状头部驱动线圈固定在头部上并且外部安装在更接近头部的每个轭的构件上。 至少第一磁体固定在远离头部的每个轭的构件上。 多个第二磁体被固定到磁头并与第一磁体相对。 头部通过第一磁体和第二磁体的排斥力被支撑在非接触状态，并且通过激励磁头驱动线圈驱动磁头。 光盘装置配备有头驱动装置。

公开(公告)号：US20090207523A1

公开(公告)日：2009-08-20

申请号：US12364125

申请日：2009-02-02

申请人： Takayuki Kawabe ,  Haruhiko Izumi ,  Yasuyuki Ozawa ,  Takuya Kamimura

发明人： Takayuki Kawabe ,  Haruhiko Izumi ,  Yasuyuki Ozawa ,  Takuya Kamimura

IPC分类号： G11B5/127 ,  G11B5/82

CPC分类号： G11B5/59655 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855

摘要： A magnetic recording medium formed on a substrate. The magnetic recording medium includes a data region including a plurality of magnetic dots arranged at predetermined positions on the substrate, for recording information; and a servo region for specifying the positions of the magnetic dots, the servo region including a plurality of magnetic segments arranged at predetermined positions on the substrate, each of the magnetic segments being smaller than each of the magnetic dots.

摘要翻译： 形成在基板上的磁记录介质。 该磁记录介质包括一数据区，该数据区包括布置在该基板上的预定位置的多个磁点，用于记录信息; 以及用于指定磁点的位置的伺服区域，所述伺服区域包括布置在基板上的预定位置的多个磁段，每个磁段小于每个磁点。

公开(公告)号：US06341102B1

公开(公告)日：2002-01-22

申请号：US09433328

申请日：1999-11-03

申请人： Tadashi Sato ,  Haruhiko Izumi ,  Goro Kawasaki ,  Satoshi Shimokawa

发明人： Tadashi Sato ,  Haruhiko Izumi ,  Goro Kawasaki ,  Satoshi Shimokawa

IPC分类号： G11B1100

CPC分类号： G11B7/122 ,  G11B7/08 ,  G11B11/1055 ,  G11B11/1058 ,  G11B17/32 ,  G11B25/043

摘要： A data handling apparatus is provided which includes a rotatable disk provided with at least an innermost track and an outermost track for storing data, and a disk cartridge for housing the disk. The disk cartridge is formed with an opening for exposure of a portion of the disk. The opening is substantially symmetrical with respect to a first center line extending radially of the disk. The data handling apparatus also includes a slider floatable relative to the disk, and a driving mechanism for moving the slider relative to the disk along a transfer path. This transfer path and the first center line of the opening are arranged to be non-parallel to each other.

摘要翻译： 提供了一种数据处理装置，其包括设置有至少最内轨道和用于存储数据的最外轨道的可旋转盘，以及用于容纳盘的盘盒。 盘盒形成有用于曝光盘的一部分的开口。 开口相对于从盘径向延伸的第一中心线基本对称。 数据处理装置还包括相对于盘浮动的滑块以及用于沿着传送路径相对于盘移动滑块的驱动机构。 该传送路径和开口的第一中心线被布置为彼此不平行。

公开(公告)号：US06320832B1

公开(公告)日：2001-11-20

申请号：US09360970

申请日：1999-07-27

申请人： Yoshihiro Nakao ,  Haruhiko Izumi

发明人： Yoshihiro Nakao ,  Haruhiko Izumi

IPC分类号： G11B509

CPC分类号： G11B7/1267 ,  G11B7/0079 ,  G11B11/10595

摘要： A method and device for controlling a power of pulsed light is provided, which is emitted by a light source, condensed by a object lens and irradiated to a recording medium for recording information in the recording medium. In order to use the power more efficiently under the limitation of the maximum output of the light source and the maximum efficiency of condensing light in the optical system, the method includes steps of performing test writing with the pulsed light having a fixed bottom power and variable peak power, calculating an optimum average power in accordance with the bottom power and the peak power of the optimum condition obtained by the test writing step, and recalculating the peak power and the bottom power in accordance with the optimum average power so that the peak power is decreased and the bottom power is increased.

摘要翻译： 提供了一种用于控制脉冲光功率的方法和装置，其由光源发射，由物镜聚光并照射到用于将信息记录在记录介质中的记录介质。 为了在光源的最大输出的限制和光学系统中的聚光的最大效率的限制下更有效地使用电力，该方法包括以下步骤：用具有固定底部功率和可变的功率的脉冲光执行测试写入 峰值功率，根据通过测试写入步骤获得的最佳条件的底部功率和峰值功率来计算最佳平均功率，并且根据最佳平均功率重新计算峰值功率和底部功率，使得峰值功率 降低，底部功率增加。

公开(公告)号：US5850377A

公开(公告)日：1998-12-15

申请号：US838832

申请日：1997-04-11

申请人： Masakazu Taguchi ,  Haruhiko Izumi

发明人： Masakazu Taguchi ,  Haruhiko Izumi

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12

CPC分类号： G11B20/10083 ,  G11B11/10515 ,  G11B20/10009 ,  G11B7/005 ,  G11B20/1258 ,  G11B2220/2537

摘要： A system reproduces data from an optical disk in which a signal obtained by encoding recording data in accordance with a recording rule including a rule corresponding to a partial response class I characteristic has been recorded. The system includes an optical head for reproducing a signal from the optical disk, an analog-to-digital converter for sampling the signal reproduced by the optical head at predetermined timing and for outputting sampling data, a determination unit for determining, based on the sampling data from the analog-to-digital converter, a transition state of data to be reproduced in accordance with a transmission line characteristic of the reproduction system for the optical disk, and a data decision unit for deciding maximum likelihood reproduction data at present timing based on the determination result obtained by the determination unit.

摘要翻译： 系统从光盘再现数据，其中根据包括与部分响应等级I特性对应的规则的记录规则对记录数据进行编码而获得的信号被记录在其中。 该系统包括用于再现来自光盘的信号的光学头，用于在预定定时对由光头再现的信号进行采样并用于输出采样数据的模数转换器，确定单元，用于基于采样 来自模数转换器的数据，根据用于光盘的再现系统的传输线特性要再现的数据的转变状态，以及数据判定单元，用于基于当前定时决定最大似然再现数据 由确定单元获得的确定结果。

公开(公告)号：US20120307403A1

公开(公告)日：2012-12-06

申请号：US13372367

申请日：2012-02-13

申请人： Kazuto KASHIWAGI ,  Makoto Asakura ,  Haruhiko Izumi ,  Masatoshi Sakurai

发明人： Kazuto KASHIWAGI ,  Makoto Asakura ,  Haruhiko Izumi ,  Masatoshi Sakurai

IPC分类号： G11B5/127 ,  G11B5/74

CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/59688

摘要： According to one embodiment, a magnetic recording medium includes: a data area on which a plurality of first magnetic dots are arranged at predetermined positions to record information; a servo area on which a plurality of second magnetic dots for specifying the positions of said plurality of first magnetic dots are arranged at predetermined positions; and servo frames configured so that a frequency of said servo frames is 2 N per circumference of said medium having a radius, that said servo frames are radially discontinuous, and that said servo frame and a space-area, on which no servo frames exist, are alternately radially arranged at a cycle W.

摘要翻译： 根据一个实施例，一种磁记录介质包括：数据区，多个第一磁点排列在预定位置以记录信息; 伺服区域，其上用于指定所述多个第一磁性点的位置的多个第二磁性点布置在预定位置; 以及伺服框架，其被配置为使得所述伺服帧的频率为具有半径的所述介质的每圆周为2N，所述伺服框架是径向不连续的，并且所述伺服框架和不存在伺服框架的空间区域， 在周期W交替地径向布置

公开(公告)号：US20100103554A1

公开(公告)日：2010-04-29

申请号：US12556303

申请日：2009-09-09

申请人： Haruhiko Izumi

发明人： Haruhiko Izumi

IPC分类号： G11B20/20

CPC分类号： G11B20/10009 ,  B82Y10/00 ,  G11B5/59688 ,  G11B5/743 ,  G11B2220/252

摘要： According to one embodiment, a media access method includes a head scanning each track of a magnetic recording medium while tilting with respect to a direction perpendicular to the track direction at all positions including a position with a skew angle of zero on the magnetic recording medium. The track includes at least one magnetic dot array. The core width of the head is set with respect to a pitch of magnetic dots in the track direction and a pitch in the direction perpendicular to the track direction so that the head does not simultaneously scan a plurality of magnetic dots while scanning one track.

摘要翻译： 根据一个实施例，介质存取方法包括磁头扫描磁记录介质的磁道，同时相对于垂直于轨道方向的方向在包括在磁记录介质上具有零倾角的位置的所有位置倾斜。 轨道包括至少一个磁点阵列。 磁头的磁芯宽度相对于轨道方向上的磁点的间距和与磁道方向垂直的方向的间距设定，使得磁头在扫描一个磁道的同时不同时扫描多个磁性点。

公开(公告)号：US5986987A

公开(公告)日：1999-11-16

申请号：US54653

申请日：1998-04-03

申请人： Masakazu Taguchi ,  Haruhiko Izumi

发明人： Masakazu Taguchi ,  Haruhiko Izumi

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12

CPC分类号： G11B20/10083 ,  G11B11/10515 ,  G11B20/10009 ,  G11B7/005 ,  G11B20/1258 ,  G11B2220/2537

摘要： A system reproduces data from an optical disk in which a signal obtained by encoding recording data in accordance with a recording rule including a rule corresponding to a partial response class I characteristic has been recorded. The system includes an optical head for reproducing a signal from the optical disk, an analog-to-digital converter for sampling the signal reproduced by the optical head at predetermined timing and for outputting sampling data, a determination unit for determining, based on the sampling data from the analog-to-digital converter, a transition state of data to be reproduced in accordance with a transmission line characteristic of the reproduction system for the optical disk, and a data decision unit for deciding maximum likelihood reproduction data at present timing based on the determination result obtained by the determination unit.

摘要翻译： 系统从光盘再现数据，其中根据包括与部分响应等级I特性对应的规则的记录规则对记录数据进行编码而获得的信号被记录在其中。 该系统包括用于再现来自光盘的信号的光学头，用于在预定定时对由光头再现的信号进行采样并用于输出采样数据的模数转换器，确定单元，用于基于采样 来自模数转换器的数据，根据用于光盘的再现系统的传输线特性要再现的数据的转变状态，以及数据判定单元，用于基于当前定时决定最大似然再现数据 由确定单元获得的确定结果。

公开(公告)号：US5876858A

公开(公告)日：1999-03-02

申请号：US709640

申请日：1996-09-09

申请人： Tomonori Ikeya ,  Tsutomu Tanaka ,  Haruhiko Izumi

发明人： Tomonori Ikeya ,  Tsutomu Tanaka ,  Haruhiko Izumi

IPC分类号： G11B11/10 ,  G11B7/257 ,  G11B11/105 ,  H01F1/00 ,  G11B7/24

CPC分类号： G11B7/2578 ,  G11B11/10591 ,  G11B11/10593 ,  G11B2007/24306 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B7/2534 ,  G11B7/2585 ,  Y10S428/928 ,  Y10T428/12465

摘要： A magneto-optical recording medium improved in reproduction stability and carrier-to-noise ratio by enlarging the magnetic anisotropy of a magnetic film. The magneto-optical recording medium is composed of a transparent substrate, a first dielectric film laminated on the transparent substrate, a magnetic film laminated on the first dielectric film, and a second dielectric film laminated on the magnetic film. The second dielectric film is formed from a material different from a material of the first dielectric film, and has film stress different from film stress of the first dielectric film. Accordingly, the coercive force and the magnetic anisotropy of the magnetic film can be enlarged.

摘要翻译： 磁光记录介质通过扩大磁性膜的磁各向异性而提高了再现稳定性和载波噪声比。 磁光记录介质由透明基板，层叠在透明基板上的第一电介质膜，层叠在第一电介质膜上的磁性膜和层叠在磁性膜上的第二电介质膜构成。 第二电介质膜由与第一电介质膜的材料不同的材料形成，并且具有与第一电介质膜的膜应力不同的膜应力。 因此，能够扩大磁性膜的矫顽力和磁各向异性。

公开(公告)号：US5871855A

公开(公告)日：1999-02-16

申请号：US381474

申请日：1995-01-31

申请人： Haruhiko Izumi ,  Masakazu Taguchi ,  Tomonori Ikeya ,  Tsutomu Tanaka ,  Toshio Sugimoto ,  Ken Tamanoi

发明人： Haruhiko Izumi ,  Masakazu Taguchi ,  Tomonori Ikeya ,  Tsutomu Tanaka ,  Toshio Sugimoto ,  Ken Tamanoi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B19/26 ,  G11B19/28 ,  G11B5/60

CPC分类号： G11B11/10597 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10584 ,  G11B11/10586 ,  G11B19/26 ,  G11B19/28 ,  Y10S428/90

摘要： A magneto-optical recording medium which is adapted to realize a partial ROM with remarkable facility in providing software. The magneto-optical recording medium comprises a transparent substrate, a volatile magnetic recording layer formed on the transparent substrate and having a Curie temperature approximately equal to or lower than a temperature raisable in a recording/reproducing apparatus of a user, and a nonvolatile magnetic recording layer formed on the volatile magnetic recording layer and having a Curie temperature higher than the temperature raisable in the recording/reproducing apparatus of the user; wherein the nonvolatile magnetic recording layer is not initialized and is retained in a state immediately after manufacture of the medium.