公开(公告)号：US08068308B2

公开(公告)日：2011-11-29

申请号：US12476773

申请日：2009-06-02

申请人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/584 ,  G11B21/02

CPC分类号： G11B5/584

摘要： In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.

摘要翻译： 在本发明的装置和方法中，伺服信号再现单元从从磁带再现的伺服信号产生PES，并且频率转换单元执行PES的FFT处理以产生频率分量信息。 然后，滤波器值生成单元基于频率分量信息生成滤波器值，并将其写入存储器。 当将各种数据信号记录到磁带上时，从存储器中读取滤波器值，并且将用作陷波滤波器的控制滤波器并入用于跟踪伺服的反馈控制。 这使得能够从PES去除周期性和窄带噪声，从而减少PES。 因此，即使当记录磁道宽度减小并且磁带速度增加时，也可以使磁头以高速和高精度跟随记录磁道的学习型最佳陷波滤波器控制。

公开(公告)号：US20090296269A1

公开(公告)日：2009-12-03

申请号：US12476773

申请日：2009-06-02

申请人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.

摘要翻译： 在本发明的装置和方法中，伺服信号再现单元从从磁带再现的伺服信号产生PES，并且频率转换单元执行PES的FFT处理以产生频率分量信息。 然后，滤波器值生成单元基于频率分量信息生成滤波器值，并将其写入存储器。 当将各种数据信号记录到磁带上时，从存储器中读取滤波器值，并且将用作陷波滤波器的控制滤波器并入用于跟踪伺服的反馈控制。 这使得能够从PES去除周期性和窄带噪声，从而减少PES。 因此，即使当记录磁道宽度减小并且磁带速度增加时，也可以使磁头以高速和高精度跟随记录磁道的学习型最佳陷波滤波器控制。

公开(公告)号：US20080123102A1

公开(公告)日：2008-05-29

申请号：US11717672

申请日：2007-03-14

申请人： Masao Fujita ,  Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G01B9/02 ,  G01B11/02

CPC分类号： G01B11/026 ,  G11B15/62

摘要： An apparatus is provided for measuring a spacing between an object to be measured T and a transparent object 4. The transparent object 4 is disposed, facing a surface of the object to be measured T, light is emitted to impinge through the transparent object 4 onto the object to be measured T, and the spacing is calculated based on an intensity of interference light occurring in a facing portion between the surface of the object to be measured T and the transparent object 4. The apparatus comprises a light source 1 for emitting light, a modulator 2 for modulating an intensity of the emitted light with modulation waves having a predetermined frequency, a sensor 7 for converting the light intensity of the interference light into an electrical signal, and a synchronous demodulator 8 for subjecting the electrical signal to synchronous demodulation using the modulation waves as reference waves.

摘要翻译： 提供了一种用于测量待测物体T与透明物体4之间的间隔的装置。透明物体4被设置为面对待测物体T的表面，发射光以穿过透明物体4撞击到 要测量的对象T，并且基于在待测物体T的表面和透明物体4之间的相对部分中发生的干涉光的强度来计算间距。该装置包括用于发射光的光源1 用于通过具有预定频率的调制波来调制发射光的强度的调制器2，用于将干扰光的光强度转换为电信号的传感器7以及用于对电信号进行同步解调的同步解调器8 使用调制波作为参考波。

公开(公告)号：US20080170328A1

公开(公告)日：2008-07-17

申请号：US11972441

申请日：2008-01-10

申请人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/187

CPC分类号： G11B5/00821 ,  G11B5/1872

摘要： The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.

摘要翻译： 本发明提供了一种磁头，即使当使用具有不同厚度的磁带时，磁头仍能保持良好的磁头接触。 磁头具有与移动的磁带接触的滑动表面。 电磁换能元件设置在滑动面上。 第一边沿磁带的移动方向形成在滑动表面的每一端。 第二边缘形成在磁带从滑动表面的每个端部移动的方向上延伸并与磁带接触的位置。

公开(公告)号：US08310783B2

公开(公告)日：2012-11-13

申请号：US11972441

申请日：2008-01-10

申请人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/255

CPC分类号： G11B5/00821 ,  G11B5/1872

摘要： The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.

摘要翻译： 本发明提供了一种磁头，即使当使用具有不同厚度的磁带时，磁头仍能保持良好的磁头接触。 磁头具有与移动的磁带接触的滑动表面。 电磁换能元件设置在滑动面上。 第一边沿磁带的移动方向形成在滑动表面的每一端。 第二边缘形成在磁带从滑动表面的每个端部移动的方向上延伸并与磁带接触的位置。

公开(公告)号：US08035929B2

公开(公告)日：2011-10-11

申请号：US12191925

申请日：2008-08-14

申请人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/265

CPC分类号： G11B5/40 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/3967

摘要： A magnetic head assembly of the present invention includes a head rail having a plurality of head element portions each including a MR element and sliding portions that come into contact with a magnetic tape, and a protective film on a magnetic tape sliding surface of the head element portions and the sliding portions, wherein the protective film is formed in a portion other than the vicinity of both ends of the head rail in a traveling direction, and an outermost surface of the protective film, on which a magnetic tape is capable of sliding, is formed flat. Thus, a magnetic head assembly used in a magnetic tape apparatus can be provided, in which an output does not decrease due to the abrasion deformation of the head element portions and the increase in spacing by the adhesion of stain.

摘要翻译： 本发明的磁头组件包括具有多个磁头元件部分的磁头导轨，磁头元件部分各自包括MR元件和与磁带接触的滑动部分，以及在磁头元件的磁带滑动表面上的保护膜 部分和滑动部分，其中保护膜沿行进方向形成在头轨两端附近的部分中，以及保护膜的能够滑动的最外表面， 形成平坦。 因此，可以提供在磁带装置中使用的磁头组件，其中由于头元件部分的磨损变形而导致的输出不会减小，并且由于污渍的附着而增加间隔。

公开(公告)号：US20090052093A1

公开(公告)日：2009-02-26

申请号：US12191925

申请日：2008-08-14

申请人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/33

CPC分类号： G11B5/40 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/3967

摘要： A magnetic head assembly of the present invention includes a head rail having a plurality of head element portions each including a MR element and sliding portions that come into contact with a magnetic tape, and a protective film on a magnetic tape sliding surface of the head element portions and the sliding portions, wherein the protective film is formed in a portion other than the vicinity of both ends of the head rail in a traveling direction, and an outermost surface of the protective film, on which a magnetic tape is capable of sliding, is formed flat. Thus, a magnetic head assembly used in a magnetic tape apparatus can be provided, in which an output does not decrease due to the abrasion deformation of the head element portions and the increase in spacing by the adhesion of stain.

摘要翻译： 本发明的磁头组件包括具有多个磁头元件部分的磁头导轨，磁头元件部分各自包括MR元件和与磁带接触的滑动部分，以及在磁头元件的磁带滑动表面上的保护膜 部分和滑动部分，其中保护膜沿行进方向形成在头轨两端附近的部分中，以及保护膜的能够滑动的最外表面， 形成平坦。 因此，可以提供在磁带装置中使用的磁头组件，其中由于头元件部分的磨损变形而导致的输出不会减小，并且由于污渍的附着而增加间隔。

公开(公告)号：US08081559B2

公开(公告)日：2011-12-20

申请号：US11960439

申请日：2007-12-19

申请人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B7/00

CPC分类号： G11B5/584 ,  G11B5/59677

摘要： The present invention provides a recording and reproducing apparatus that can perform high-precision tracking servo control by removing noise from detected servo signals. The recording and reproducing apparatus performs tracking servo control while reading servo signals 10 that are formed on a surface 9 of a recording medium 2 so as to produce optical contrast, the apparatus including a modulated irradiator 20 for irradiating the servo signals 10 with a light beam, the intensity of the light beam being modulated by a modulating wave that is frequency-modulated; a photoelectric converter 30 for converting reflected light from the servo signals 10 into electric signals; and a synchronous demodulator 15 for subjecting the electrical signal to synchronous demodulation using the modulating wave as a reference wave.

摘要翻译： 本发明提供了一种通过从检测到的伺服信号中去除噪声来执行高精度跟踪伺服控制的记录和再现装置。 记录和重放装置执行跟踪伺服控制，同时读取形成在记录介质2的表面9上的伺服信号10以便产生光学对比度，该装置包括调制辐射器20，用于用光束照射伺服信号10 光束的强度由被调制的调制波调制; 用于将来自伺服信号10的反射光转换为电信号的光电转换器30; 以及用于使用调制波作为参考波对电信号进行同步解调的同步解调器15。

公开(公告)号：US20080151712A1

公开(公告)日：2008-06-26

申请号：US11960439

申请日：2007-12-19

申请人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/09

CPC分类号： G11B5/584 ,  G11B5/59677

摘要： The present invention provides a recording and reproducing apparatus that can perform high-precision tracking servo control by removing noise from detected servo signals. The recording and reproducing apparatus performs tracking servo control while reading servo signals 10 that are formed on a surface 9 of a recording medium 2 so as to produce optical contrast, the apparatus including a modulated irradiator 20 for irradiating the servo signals 10 with a light beam, the intensity of the light beam being modulated by a modulating wave that is frequency-modulated; a photoelectric converter 30 for converting reflected light from the servo signals 10 into electric signals; and a synchronous demodulator 15 for subjecting the electrical signal to synchronous demodulation using the modulating wave as a reference wave.

摘要翻译： 本发明提供了一种通过从检测到的伺服信号中去除噪声来执行高精度跟踪伺服控制的记录和再现装置。 记录和重放装置执行跟踪伺服控制，同时读取形成在记录介质2的表面9上的伺服信号10以便产生光学对比度，该装置包括调制辐射器20，用于用光束照射伺服信号10 光束的强度由被调制的调制波调制; 用于将来自伺服信号10的反射光转换为电信号的光电转换器30; 以及用于使用调制波作为参考波对电信号进行同步解调的同步解调器15。

公开(公告)号：US20080070066A1

公开(公告)日：2008-03-20

申请号：US11898757

申请日：2007-09-14

申请人： Hisanobu Mikamo ,  Hidekazu Kawatoko ,  Makoto Shiokawa ,  Shinji Kawakami ,  Masanori Yamasaki ,  Hitoshi Tsukamoto ,  Sadamu Kuse

发明人： Hisanobu Mikamo ,  Hidekazu Kawatoko ,  Makoto Shiokawa ,  Shinji Kawakami ,  Masanori Yamasaki ,  Hitoshi Tsukamoto ,  Sadamu Kuse

IPC分类号： G11B5/842 ,  B05D5/12

CPC分类号： G11B5/842

摘要： A method for manufacturing a magnetic recording medium of the present invention includes a magnetic layer forming step in which a drying process is performed. The drying process includes: a pre-heating stage in which a magnetic coating film is heated until the surface temperature of the magnetic coating film stops rising and reaches a substantially constant temperature; a constant rate drying stage that is performed after the pre-heating stage in which the surface temperature of the magnetic coating film is held substantially constant; and a falling rate drying stage that is performed after the constant rate drying stage in which the surface temperature of the magnetic coating film is increased to be higher than the surface temperature during the constant rate drying stage to harden the magnetic coating film. The constant rate drying period in which the constant rate drying stage is performed is 0.2 seconds or more. The first solvent is made of one solvent or two or more solvents having different boiling points, and the difference (Tb−Ts) between the boiling point Tb of the solvent having the lowest boiling point among the solvents contained in the first solvent and the surface temperature Ts of the magnetic coating film during the constant rate drying period is 1 to 50° C.

摘要翻译： 本发明的磁记录介质的制造方法包括进行干燥处理的磁性层形成工序。 干燥过程包括：预热阶段，其中加热磁性涂膜直到磁性涂膜的表面温度停止上升并达到基本恒定的温度; 在预热阶段之后进行恒定速率干燥阶段，其中磁性涂膜的表面温度保持在大致恒定的范围; 以及在恒速干燥阶段之后，在恒速干燥阶段使磁性涂膜的表面温度升高到高于表面温度的固定速率干燥阶段之后进行硬化处理的落下率干燥阶段。 进行恒定速率干燥阶段的恒定速率干燥时间为0.2秒以上。 第一溶剂由一种溶剂或两种或更多种沸点不同的溶剂制成，沸点T < 在恒定速率干燥期间，第一溶剂中所含溶剂中具有最低沸点的溶剂的b b和磁性涂膜的表面温度T S 1 / S 2为1〜50℃ C。