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：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：US08027115B2

公开(公告)日：2011-09-27

申请号：US12213055

申请日：2008-06-13

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B5/02 ,  G11B5/09 ,  H04N5/77

CPC分类号： G11B27/034 ,  G06F3/0601 ,  G06F2003/0698 ,  G11B2220/95 ,  H04N5/77 ,  H04N5/775 ,  H04N5/782 ,  H04N9/8042

摘要： A data recording apparatus and a data recording system of the present invention includes buffer memories 2a to 2c that accumulate data in a plurality of channels transferred from an external appliance on a channel basis, a data selector 3 that reads the data accumulated in the buffer memories 2a to 2c, and a data drive 4 that records the data read by the data selector 3 onto a magnetic tape, wherein the data selector 3 selectively reads the data accumulated in the buffer memories 2a to 2c, and outputs the data in an order of recording onto a magnetic tape in the tape drive 4. According to such a configuration, a data recording apparatus that can be realized at low cost and a recording system using the data recording apparatus can be provided.

摘要翻译： 本发明的数据记录装置和数据记录系统包括：缓冲存储器2a至2c，其累积从外部设备在信道上传送的多个信道中的数据;数据选择器3，其读取累积在缓冲存储器中的数据 以及数据驱动器4，其将由数据选择器3读取的数据记录到磁带上，其中数据选择器3选择性地读取累积在缓冲存储器2a至2c中的数据，并按照 记录在磁带驱动器4中的磁带上。根据这种配置，可以提供可以以低成本实现的数据记录装置和使用数据记录装置的记录系统。

公开(公告)号：US08130463B2

公开(公告)日：2012-03-06

申请号：US12128156

申请日：2008-05-28

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B21/02

CPC分类号： G11B5/00813 ,  G11B5/02 ,  G11B5/022 ,  G11B2005/0005

摘要： A data recording apparatus of the present invention includes a head that records data signals by magnetizing a magnetic tape 10 and a recording control portion that controls the recording operation by causing recording current to flow to the head. The recording control portion controls the operation of the head, so that in the magnetic tape 10, which is direct current demagnetized continuously in the longitudinal direction, a magnetic field is formed intermittently in an opposite direction to the magnetization direction of the direct current demagnetization. Thus, when recording data signals on the magnetic recording medium, it is possible to make the current flowing to the head small and to realize apparatus power consumption reductions, load reductions for the head and circuitry, and reduction in crosstalk noise from the head chip used for writing to the head chip used for reading.

摘要翻译： 本发明的数据记录装置包括通过磁化磁带10记录数据信号的磁头和通过使记录电流流向磁头来控制记录操作的记录控制部分。 记录控制部分控制磁头的操作，使得在沿着纵向方向连续地退磁的磁带10中，在与直流退磁的磁化方向相反的方向间歇地形成磁场。 因此，当在磁记录介质上记录数据信号时，可以使流过头部的电流变小，并实现设备功耗降低，头部和电路的负载降低，以及减少来自头部芯片的串扰噪声 用于写入用于阅读的头部芯片。

公开(公告)号：US20080310044A1

公开(公告)日：2008-12-18

申请号：US12213055

申请日：2008-06-13

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B5/02

CPC分类号： G11B27/034 ,  G06F3/0601 ,  G06F2003/0698 ,  G11B2220/95 ,  H04N5/77 ,  H04N5/775 ,  H04N5/782 ,  H04N9/8042

摘要： A data recording apparatus and a data recording system of the present invention includes buffer memories 2a to 2c that accumulate data in a plurality of channels transferred from an external appliance on a channel basis, a data selector 3 that reads the data accumulated in the buffer memories 2a to 2c, and a data drive 4 that records the data read by the data selector 3 onto a magnetic tape, wherein the data selector 3 selectively reads the data accumulated in the buffer memories 2a to 2c, and outputs the data in an order of recording onto a magnetic tape in the tape drive 4. According to such a configuration, a data recording apparatus that can be realized at low cost and a recording system using the data recording apparatus can be provided.

摘要翻译： 本发明的数据记录装置和数据记录系统包括：缓冲存储器2a至2c，其累积从外部设备在信道上传送的多个信道中的数据;数据选择器3，其读取累积在缓冲存储器中的数据 以及数据驱动器4，其将由数据选择器3读取的数据记录到磁带上，其中数据选择器3选择性地读取累积在缓冲存储器2a至2c中的数据，并按照 记录在磁带驱动器4中的磁带上。根据这种配置，可以提供可以以低成本实现的数据记录装置和使用数据记录装置的记录系统。

公开(公告)号：US07808736B2

公开(公告)日：2010-10-05

申请号：US12019344

申请日：2008-01-24

申请人： Kenji Tanaka ,  Kenichiro Yoshida ,  Masao Fujita ,  Sadamu Kuse

发明人： Kenji Tanaka ,  Kenichiro Yoshida ,  Masao Fujita ,  Sadamu Kuse

IPC分类号： G11B5/09 ,  G11B21/02 ,  G11B5/03

CPC分类号： G11B5/584 ,  G11B5/024

摘要： A servo signal recording apparatus and servo-signal recording method for recording a servo signal on a magnetic tape that includes a magnetic layer having a data area capable of storing data and a servo area capable of storing a servo signal, the apparatus including a transportation unit for transporting the magnetic tape; a direct current (DC) erasing unit on a downstream side in a magnetic tape transportation direction that performs DC erasure to a surface layer portion of the magnetic layer by magnetization in a longitudinal direction of the magnetic tape; and a servo signal recording unit on a downstream side of the DC erasing unit in the magnetic tape transportation direction, that rubs against the magnetic layer of the magnetic tape, and records a servo signal in the servo area by magnetization in a direction opposite to a direction of the magnetization of the DC erasing unit.

摘要翻译： 一种用于在包括具有能够存储数据的数据区的磁性层和能够存储伺服信号的伺服区的磁带上记录伺服信号的伺服信号记录装置和伺服信号记录方法，所述装置包括传送单元 用于运送磁带; 在磁带传送方向下游侧的直流（DC）擦除单元，其通过磁带的长度方向的磁化对磁性层的表层部进行直流擦除; 以及伺服信号记录单元，其在磁带传送方向上的直流擦除单元的下游侧，摩擦磁带的磁性层，并且通过磁化沿与磁带的相反方向的磁化将伺服信号记录在伺服区域中 直流擦除单元的磁化方向。

公开(公告)号：US09311946B2

公开(公告)日：2016-04-12

申请号：US13211051

申请日：2011-08-16

申请人： Kenji Tanaka ,  Masao Fujita ,  Sadamu Kuse

发明人： Kenji Tanaka ,  Masao Fujita ,  Sadamu Kuse

IPC分类号： G11B5/71 ,  G11B5/714 ,  G11B5/738

CPC分类号： G11B5/71 ,  G11B5/70615 ,  G11B5/70626 ,  G11B5/714 ,  G11B5/738 ,  G11B5/78

摘要： A magnetic recording medium of the present invention is a magnetic recording medium including a non-magnetic substrate; a non-magnetic layer that is formed on one of principal surfaces of the non-magnetic substrate and contains a non-magnetic powder, a binder, and a lubricant; and a magnetic layer that is formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate and contains a magnetic powder and a binder. The magnetic powder has an average particle size between 10 nm and 35 nm inclusive. The lubricant is migratable to the magnetic layer and forms a lubricant layer on a surface of the magnetic layer when a pressure is applied to the magnetic layer. When spacing of the surface of the magnetic layer before and after washing the lubricant with n-hexane is measured with a TSA (Tape Spacing Analyzer), the value of the spacing after washing is 3 to 10 nm, and the value of the spacing before washing is 1 to 5 nm smaller than the value of the spacing after washing.

摘要翻译： 本发明的磁记录介质是包括非磁性基片的磁记录介质; 非磁性层，其形成在所述非磁性基板的一个主表面上并且包含非磁性粉末，粘合剂和润滑剂; 以及形成在与非磁性基板相对的非磁性层的主表面上并且包含磁性粉末和粘合剂的磁性层。 磁性粉末的平均粒径为10nm〜35nm。 当向磁性层施加压力时，润滑剂可移动到磁性层并在磁性层的表面上形成润滑剂层。 当使用TSA（胶带间隔分析仪）测量用正己烷洗涤润滑剂之前和之后的磁性层表面的间隔时，洗涤后的间隔值为3至10nm，并且之前的间隔值 洗涤比洗涤后的间隔值小1〜5nm。