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1. 发明授权

US08081559B2 Recording and reproducing apparatus and recording medium 失效
标题翻译：记录和再现设备和记录介质
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。

2. 发明申请

US20080151712A1 RECORDING AND REPRODUCING APPARATUS AND RECORDING MEDIUM 失效
标题翻译：记录和再现设备和记录介质
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。

3. 发明授权

US08068308B2 Servo signal recording apparatus, information recording apparatus, and tracking servo method 有权
标题翻译：伺服信号记录装置，信息记录装置和跟踪伺服方法
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。

4. 发明申请

US20090296269A1 SERVO SIGNAL RECORDING APPARATUS, INFORMATION RECORDING APPARATUS, AND TRACKING SERVO METHOD 有权
标题翻译：伺服信号记录装置，信息记录装置和跟踪伺服方法
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。

5. 发明申请

US20080123102A1 Apparatus and method for measuring spacing 审中-公开
标题翻译：仪器和方法测量间距
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。

6. 发明授权

US08027115B2 Data recording apparatus for recording a data signal onto a magnetic recording medium and data recording system using the data recording apparatus 有权
标题翻译：用于将数据信号记录到磁记录介质上的数据记录装置和使用数据记录装置的数据记录系统
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。

7. 发明授权

US09165586B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US09165586B2
公开(公告)日：2015-10-20
申请号：US13330219
申请日：2011-12-19
申请人： Shinji Kawakami , Sadamu Kuse , Kenji Tanaka
发明人： Shinji Kawakami , Sadamu Kuse , Kenji Tanaka
IPC分类号： G11B5/706 , G11B5/70 , G11B5/714
CPC分类号： G11B5/714 , G11B5/70 , G11B5/70678
摘要： The magnetic recording medium of the present invention comprises: a non-magnetic substrate; a non-magnetic layer formed on one of principal surfaces of the non-magnetic substrate; and a magnetic layer formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate. Mr and t satisfy 0.0020 μT·m≦Mr·t≦0.0150 μT·m, where Mr is the residual magnetic flux density of the magnetic layer, and t is the average thickness of the magnetic layer, L1 satisfies 2 nm≦L1≦6 nm, where L1 is the average thickness of a first mixed layer that is formed on the surface of the magnetic layer opposite to the non-magnetic layer, and L2 satisfies 0.1≦L2/t≦0.45, where L2 is the average thickness of a second mixed layer that is formed on the surface of the magnetic layer facing the non-magnetic layer.
摘要翻译：本发明的磁记录介质包括：非磁性基片; 形成在非磁性基板的一个主表面上的非磁性层; 以及形成在与非磁性基板相对的非磁性层的主表面上的磁性层。 Mr和t满足0.0020μT·m＆nlE; Mr·t＆nlE; 0.0150μT·m，其中Mr是磁性层的剩余磁通密度，t是磁性层的平均厚度，L1满足2nm＆nlE; L1＆nlE; 6 nm，其中L1是形成在与非磁性层相反的磁性层的表面上的第一混合层的平均厚度，并且L2满足0.1＆lt; lE; L2 / t＆nlE; 0.45，其中L2是形成在面向非磁性层的磁性层的表面上的第二混合层。

8. 发明授权

US07808736B2 Servo signal recording apparatus, servo signal recording method, and magnetic tape 有权
标题翻译：伺服信号记录装置，伺服信号记录方法和磁带
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。

9. 发明授权

US08130463B2 Data recording apparatus and data recording method 有权
标题翻译：数据记录装置和数据记录方法
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。

10. 发明申请

US20080310044A1 Data recording apparatus and data recording system 有权
标题翻译：数据记录装置和数据记录系统
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。

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