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72 条记录 (耗时 0.039 秒)

    Light modulation method for forming a mark in magneto-optical recording system
    2.
    发明授权
    Light modulation method for forming a mark in magneto-optical recording system 失效
    用于在磁光记录系统中形成标记的光调制方法

    公开(公告)号：US5457666A

    公开(公告)日：1995-10-10

    申请号：US114062

    申请日：1993-08-31

    申请人： Tsuyoshi Toda ,  Hiroshi Ide ,  Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroyuki Tsuchinaga ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu

    发明人： Tsuyoshi Toda ,  Hiroshi Ide ,  Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroyuki Tsuchinaga ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B7/126 ,  G11B11/10506 ,  G11B11/1053 ,  G11B7/0045 ,  G11B7/006

    摘要： A magneto-optical disk recording control method using the mark length recording method wherein the marks and gap regions between marks are recorded on the surface of the disk by maintaining a constant temperature distribution during the recording. The laser is driven to a non-recording level in gap regions between marks that exceed a base recording level used for reproduction of the marks. When a mark is recorded, the laser power is increased to a recording power level and after the mark has been recorded, the laser power level is reduced to the base power level, followed by being raised to the gap recording level. Control of the laser is performed by superposing a plurality of pulse trains that are synchronized with respect to a clock having a cycle T. The pulse trains are derived from the code train to be recorded and have pulses with a duration that is an integral multiple of (1/2)T. If the pulse width of the recording code train exceeds 2T, then the laser is controlled to reach a first power level in accordance with pulses of a first pulse train, be reduced to the gap recording level and then raised to a second power level in accordance with a second recording pulse train to maintain the temperature distribution constant during the recording of the mark. For the recording of longer marks, the laser is controlled to vary between the second power level and the gap recording level.

    摘要翻译： 一种使用标记长度记录方法的磁光盘记录控制方法，其中通过在记录期间保持恒定的温度分布将标记之间的标记和间隙区域记录在盘的表面上。 在超过用于再现标记的基本记录水平的标记之间的间隙区域中激光被驱动到非记录水平。 当记录标记时，激光功率增加到记录功率水平，并且在记录标记之后，激光功率水平降低到基本功率水平，然后升高到间隙记录水平。 通过叠加相对于具有周期T的时钟同步的多个脉冲串来执行激光的控制。脉冲序列是从要被记录的代码序列导出的，具有持续时间为整数倍的脉冲 （1/2）T。 如果记录代码串的脉冲宽度超过2T，则根据第一脉冲序列的脉冲将激光器控制到达到第一功率电平，减小到间隙记录电平，然后依次升高到第二功率电平 具有第二记录脉冲串，以在记录记录期间保持温度分布恒定。 为了记录更长的标记，激光器被控制在第二功率电平和间隙记录电平之间变化。

    Recording method using trial write test pattern
    5.
    发明授权
    Recording method using trial write test pattern 失效
    录音方式采用试写式测试模式

    公开(公告)号：US5732061A

    公开(公告)日：1998-03-24

    申请号：US731243

    申请日：1996-10-11

    申请人： Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroshi Ide ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu ,  Tsuyoshi Toda

    发明人： Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroshi Ide ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu ,  Tsuyoshi Toda

    IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/125 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B7/00

    CPC分类号： G11B7/126 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10009 ,  G11B20/10212 ,  G11B20/1816 ,  G11B7/0045 ,  G11B7/1267 ,  G11B11/10506 ,  G11B11/10508 ,  G11B20/1258 ,  G11B7/24085

    摘要： In a write control method on an optical recording, at least one shift amount selected from the defocus amount of a laser beam on a recording medium, the shift amount of a recording position on a recording track and the shift amount of laser power during recording is controlled such that the selected amount falls within a predetermined range. Subsequently, a trial signal is trially recorded at a plurality of trial zones on the recording medium by using a laser power value as a parameter. The recorded trial signal is read and a difference .DELTA.V between center levels of a highest density waveform and a lowest density waveform is detected. In connection with each trial zone, the laser power value when a reading trial signal which makes the difference .DELTA.V minimum is recorded is defined as an optimum recording power value. Regular data is recorded at a predetermined storage area on the recording medium by using an optimum laser power value determined in connection with a trial zone closest to the predetermined storage area.

    摘要翻译： 在光学记录中的写入控制方法中，从记录介质上的激光束的散焦量，记录轨道上的记录位置的偏移量和记录期间的激光功率的移动量选择的至少一个偏移量是 被控制使得所选择的量落在预定范围内。 随后，通过使用激光功率值作为参数，在记录介质上的多个试验区上试用信号。 读取记录的试验信号，并检测最高密度波形的中心水平和最低密度波形之间的差ΔTA。 结合每个试验区域，当记录使DELTA V最小值的读取试验信号被记录时的激光功率值被定义为最佳记录功率值。 通过使用与最接近预定存储区域的试验区域确定的最佳激光功率值，将正常数据记录在记录介质上的预定存储区域。

    Method of controlling recording of optical records
    7.
    发明授权
    Method of controlling recording of optical records 失效
    控制光学记录记录的方法

    公开(公告)号：US5590111A

    公开(公告)日：1996-12-31

    申请号：US91003

    申请日：1993-07-13

    申请人： Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroshi Ide ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu ,  Tsuyoshi Toda

    发明人： Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroshi Ide ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu ,  Tsuyoshi Toda

    IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/125 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B7/00 ,  G11B3/90 ,  G11B5/09

    CPC分类号： G11B7/126 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10009 ,  G11B20/10212 ,  G11B20/1816 ,  G11B7/0045 ,  G11B7/1267 ,  G11B11/10506 ,  G11B11/10508 ,  G11B20/1258 ,  G11B7/24085

    摘要： In a write control method on an optical recording, at least one shift amount selected from the defocus amount of a laser beam on a recording medium, the shift amount of a recording position on a recording track and the shift amount of laser power during recording is controlled such that the selected amount falls within a predetermined range. Subsequently, a trial signal is trially recorded at a plurality of trial zones on the recording medium by using a laser power value as a parameter. The recorded trial signal is read and a difference .DELTA.V between center levels of a highest density waveform and a lowest density waveform is detected. In connection with each trial zone, the laser power value when a reading trial signal which makes the difference .DELTA.V minimum is recorded is defined as an optimum recording power value. Regular data is recorded at a predetermined storage area on the recording medium by using an optimum laser power value determined in connection with a trial zone closest to the predetermined storage area.

    摘要翻译： 在光学记录中的写入控制方法中，从记录介质上的激光束的散焦量，记录轨道上的记录位置的偏移量和记录期间的激光功率的移动量选择的至少一个偏移量是 被控制使得所选择的量落在预定范围内。 随后，通过使用激光功率值作为参数，在记录介质上的多个试验区上试用信号。 读取记录的试验信号，并检测最高密度波形的中心水平和最低密度波形之间的差ΔTA。 结合每个试验区域，当记录使DELTA V最小值的读取试验信号被记录时的激光功率值被定义为最佳记录功率值。 通过使用与最接近预定存储区域的试验区域确定的最佳激光功率值，将正常数据记录在记录介质上的预定存储区域。

    Information reproducing apparatus with a DC level correcting capability
    9.
    发明授权
    Information reproducing apparatus with a DC level correcting capability 失效
    具有DC电平校正功能的信息再现装置

    公开(公告)号：US5412632A

    公开(公告)日：1995-05-02

    申请号：US28224

    申请日：1993-03-09

    申请人： Seiichi Mita ,  Toru Kawashima ,  Toshimitsu Kaku

    发明人： Seiichi Mita ,  Toru Kawashima ,  Toshimitsu Kaku

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

    CPC分类号： G11B11/10597 ,  G11B20/10009

    摘要： A signal reproducing system discriminates signals stably in the case of reproducing a signal from an optical recording medium which has coexistent recording areas with the signals recorded in different recording forms therein. Parts that constitute a reproduced signal are respectively derived by corresponding signal detectors from the optical recording medium in which a preformat area and a data area are included as the coexistent recording areas. The average potentials of VFO parts, which are respectively contained in the reproduced signal parts, are detected on the basis of the envelopes of the signal parts by a peak detecting circuit and a bottom detecting circuit. The detected average potentials are compared with a reference voltage, and the resulting difference potentials are added to the reproduced signal by an adder to bring the average potentials of the VFO parts into agreement. Further, an unwanted part of the output signal of the adder corresponding thereto is replaced by a switch with the output signal of a signal generator, which has an average potential equal to the average potential of the VFO parts brought into agreement.

    摘要翻译： 信号再现系统在再现来自具有记录在不同记录形式的信号的具有共存记录区域的光记录介质的信号的情况下，稳定地鉴别信号。 构成再现信号的部件分别由来自其中包括预格式区域和数据区域的光记录介质的相应信号检测器导出为共存记录区域。 基于由峰值检测电路和底部检测电路的信号部分的包络来检测分别包含在再现信号部分中的VFO部分的平均电位。 将检测到的平均电位与参考电压进行比较，并通过加法器将所得差分电位加到再现信号上，使VFO部分的平均电位一致。 此外，与其对应的加法器的输出信号的不希望的部分由具有信号发生器的输出信号的开关代替，该信号发生器具有等于VFO部分的平均电位的平均电位。

    Optical tape apparatus with a tracking control mechanism and/or a focusing control mechanism
    10.
    发明授权
    Optical tape apparatus with a tracking control mechanism and/or a focusing control mechanism 失效
    具有跟踪控制机构和/或聚焦控制机构的光带装置

    公开(公告)号：US4970707A

    公开(公告)日：1990-11-13

    申请号：US239389

    申请日：1988-09-01

    申请人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

    发明人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

    IPC分类号： G11B7/003 ,  G11B7/09

    CPC分类号： G11B7/09 ,  G11B7/0031 ,  G11B7/0925

    摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.

    摘要翻译： 具有改进的聚焦和跟踪控制的光带装置。 光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。 引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。 光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。 光学系统包括用于将光束聚焦到胶带上的聚光透镜。 通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。 通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。 在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。 读头读取定时标记，光头读取跟踪信号。 定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。