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75 条记录 (耗时 0.034 秒)

    Optical disc apparatus with tracking error compensation
    21.
    发明授权
    Optical disc apparatus with tracking error compensation 失效
    具有跟踪误差补偿的光盘设备

    公开(公告)号：US5475662A

    公开(公告)日：1995-12-12

    申请号：US175352

    申请日：1994-01-05

    申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

    发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

    IPC分类号： G11B7/007 ,  G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/00718 ,  G11B7/094

    摘要： An optical disc apparatus, which uses an optical disc having a signal recorded on both hollow and convex portions of tracks, provides stable tracking control. An offset judging circuit judges whether the signal has been recorded only on either of two recording regions adjacent in a vertical direction to the track direction. An offset application circuit applies an offset voltage to an error signal on the basis of a control signal output in accordance with the result of the offset judging means. This effectively cancels an offset in the tracking error signal caused by the existence of recording pits only on an inner circumference side or outer circumference side of an adjacent recording track to provide stable tracking control. Moreover, addresses of presently recorded regions are stored in a recorded address control memory, so that detection that the signal has been recorded on either of two adjacent recording regions can be performed with a simple structure.

    摘要翻译： PCT No.PCT / JP93 / 00630 Sec。 371日期1994年1月5日 102（e）日期1994年1月5日PCT提交1993年5月13日PCT公布。 公开号WO93 / 23848 日期：1993年11月25日。使用具有记录在轨道的两个中空部分和凸部上的信号的光盘的光盘装置提供稳定的跟踪控制。 偏移判断电路判断信号是否仅记录在与轨道方向垂直的方向上相邻的两个记录区域中的任一个。 偏移应用电路根据根据偏移判定装置的结果输出的控制信号，将偏移电压施加到误差信号。 这有效地消除了仅在相邻记录磁道的内周侧或外周侧存在记录凹坑引起的跟踪误差信号中的偏移，以提供稳定的跟踪控制。 此外，当前记录的区域的地址被存储在记录的地址控制存储器中，使得可以以简单的结构来执行信号已被记录在两个相邻记录区域中的任一个上的检测。

    Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element
    22.
    发明授权
    Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element 失效
    光拾取头，其中通过检测来自全息光学元件的衍射光束的相位差产生误差信号

    公开(公告)号：US5293367A

    公开(公告)日：1994-03-08

    申请号：US669548

    申请日：1991-03-14

    申请人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Naoyasu Miyagawa

    发明人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Naoyasu Miyagawa

    IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/127 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353

    摘要： A light source emits a light beam which is focused on an optical recording medium. The light beam is reflected and diffracted by the optical recording medium. A holographic optical element has divided regions formed with different holographic patterns. The divided regions of the holographic optical element diffract the light beam reflected and diffracted by the optical recording medium, and thereby generate diffraction light beams respectively. The divided regions of the holographic optical element lie in quadrants of an imaginary X-Y coordinate system respectively. An X axis of the coordinate system extends in a direction corresponding to a direction of a pit sequence on the optical recording medium, that is, a tangential direction of the optical recording medium. A Y axis of the coordinate system extends in a direction corresponding to a direction perpendicular to the direction of the pit sequence, that is, a radial direction of the optical recording medium. Photodetectors receive the diffraction light beams generated by the divided regions of the holographic optical element, and convert the received diffraction light beams into corresponding electric signals. Phases of the electric signals are compared, and a tracking error signal is generated on the basis of a result of the phase comparison.

    摘要翻译： 光源发射聚焦在光学记录介质上的光束。 光束被光记录介质反射和衍射。 全息光学元件具有由不同全息图形成的分割区域。 全息光学元件的分割区域衍射由光记录介质反射和衍射的光束，从而分别产生衍射光束。 全息光学元件的分割区域分别位于虚拟X-Y坐标系的象限中。 坐标系的X轴在与光记录介质上的凹坑序列的方向对应的方向上延伸，即光记录介质的切线方向。 坐标系的Y轴在与垂直于凹坑序列方向（即光记录介质的径向）的方向相对应的方向上延伸。 光检测器接收由全息光学元件的分割区域产生的衍射光束，并将接收的衍射光束转换成相应的电信号。 比较电信号的相位，并且基于相位比较的结果生成跟踪误差信号。

    RECORDING METHOD, RECORDING DEVICE AND INFORMATION RECORDING MEDIUM
    23.
    发明申请
    RECORDING METHOD, RECORDING DEVICE AND INFORMATION RECORDING MEDIUM 审中-公开
    记录方法，记录装置和信息记录介质

    公开(公告)号：US20120057448A1

    公开(公告)日：2012-03-08

    申请号：US13318722

    申请日：2011-03-07

    申请人： Kiyotaka Ito ,  Yasumori Hino ,  Naoyasu Miyagawa ,  Atsushi Nakamura

    发明人： Kiyotaka Ito ,  Yasumori Hino ,  Naoyasu Miyagawa ,  Atsushi Nakamura

    IPC分类号： G11B7/125 ,  G11B7/139

    CPC分类号： G11B7/00456 ,  G11B7/0062

    摘要： A writing method according to the present invention is a method for writing a data sequence as a combination of marks and spaces on an information recording medium by condensing a laser beam through a lens. The writing method is characterized in that a cooling pulse for recording a mark that is even shorter than the limit of optical resolution of the laser beam and another cooling pulse for recording a mark that is still longer than the limit of the optical resolution of the laser beam are applied under mutually different conditions.

    摘要翻译： 根据本发明的写入方法是通过将激光束通过透镜聚焦来将数据序列作为标记和间隔的组合写入信息记录介质的方法。 写入方法的特征在于，用于记录比激光束的光学分辨率的极限更短的标记的冷却脉冲和用于记录比激光的光学分辨率的极限更长的标记的另一个冷却脉冲 光束在相互不同的条件下施加。

    Method and device for optical recording onto optical disc medium
    24.
    发明授权
    Method and device for optical recording onto optical disc medium 有权

    公开(公告)号：US08089844B2

    公开(公告)日：2012-01-03

    申请号：US12915307

    申请日：2010-10-29

    申请人： Atsushi Nakamura ,  Naoyasu Miyagawa

    发明人： Atsushi Nakamura ,  Naoyasu Miyagawa

    IPC分类号： G11B7/00

    CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/0062

    摘要： There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge positions of said marks and the spaces between marks, the recording pulse train having been created by modulating laser light into plural power levels. The method includes: coding to-be-recorded data into coded data consisting of the combination of marks and spaces; classifying said marks within said coded data on the basis of the mark length and the preceding or succeeding space lengths of the marks; shifting the position of the second pulse edge counted from the end portion of the recording pulse train for forming said marks, depending on the result of said classification, to adjust said recording pulse train; and directing said recording pulse train to the optical disc medium to form said marks thereon.

    Optical information recording method, optical information recording and reproducing device, and optical information recording medium
    25.
    发明申请
    Optical information recording method, optical information recording and reproducing device, and optical information recording medium 有权
    光信息记录方法，光信息记录再现装置和光信息记录介质

    公开(公告)号：US20080019241A1

    公开(公告)日：2008-01-24

    申请号：US11903019

    申请日：2007-09-20

    申请人： Naoyasu Miyagawa ,  Kenichi Nishiuchi

    发明人： Naoyasu Miyagawa ,  Kenichi Nishiuchi

    IPC分类号： G11B7/24

    CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/007 ,  G11B2007/0013

    摘要： A plurality of types of recording pulse control rules for which the recording pulse waveform is determined according to the information signals to be recorded are stored in advance in an optical disk. When recording to the optical disk, information is recorded using a recording pulse where, due to the focused laser beam, the temperature in the recording layer cools more rapidly at a second information recording layer closer to the side where light is incident than at a first information recording layer farther away from the side where light is incident.

    摘要翻译： 根据要记录的信息信号确定记录脉冲波形的多种类型的记录脉冲控制规则被预先存储在光盘中。 当记录到光盘时，使用记录脉冲记录信息，其中由于聚焦的激光束，记录层中的温度在更靠近光入射的一侧的第二信息记录层处比在第一 信息记录层远离光入射的一侧。

    Method and device for optical recording onto optical disc medium
    26.
    发明申请
    Method and device for optical recording onto optical disc medium 有权
    用于光盘记录到光盘介质上的方法和装置

    公开(公告)号：US20070165506A1

    公开(公告)日：2007-07-19

    申请号：US10583320

    申请日：2005-01-06

    申请人： Atsushi Nakamura ,  Naoyasu Miyagawa

    发明人： Atsushi Nakamura ,  Naoyasu Miyagawa

    IPC分类号： G11B7/0045

    CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/0062

    摘要： There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge positions of said marks and the spaces between marks, the recording pulse train having been created by modulating laser light into plural power levels. The method includes: coding to-be-recorded data into coded data consisting of the combination of marks and spaces; classifying said marks within said coded data on the basis of the mark length and the preceding or succeeding space lengths of the marks; shifting the position of the second pulse edge counted from the end portion of the recording pulse train for forming said marks, depending on the result of said classification, to adjust said recording pulse train; and directing said recording pulse train to the optical disc medium to form said marks thereon.

    摘要翻译： 提供了一种用于将记录脉冲序列引导到光盘介质以在其上形成标记并用于记录信息作为关于所述标记的边缘位置和标记之间的空间的信息的光学记录方法，记录脉冲串是通过调制产生的 激光成多个功率级。 该方法包括：将要记录的数据编码成由标记和空格的组合组成的编码数据; 基于标记长度和标记的前一或后续间隔长度，对所述编码数据内的所述标记进行分类; 根据所述分类的结果，从用于形成所述标记的记录脉冲序列的端部计数的第二脉冲边缘的位置移位，以调整所述记录脉冲串; 并将所述记录脉冲序列引导到光盘介质上以在其上形成所述标记。

    High density analog recording using write symbols having distinguishable readout waveforms
    28.
    发明授权
    High density analog recording using write symbols having distinguishable readout waveforms 有权
    使用具有可区分读出波形的写符号的高密度模拟记录

    公开(公告)号：US07002890B2

    公开(公告)日：2006-02-21

    申请号：US09823852

    申请日：2001-03-29

    申请人： Naoyasu Miyagawa ,  Masud Mansuripur

    发明人： Naoyasu Miyagawa ,  Masud Mansuripur

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1267 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/0062 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24088 ,  G11B11/10595 ,  G11B20/02

    摘要： A method of recording data on a recording medium includes mapping the data to a set of write symbols wherein each write symbol represents more than one bit of the data. The set of write symbols is defined by defining a set of variable write parameters; generating a plurality of candidate write symbols that specify different values for the variable write parameters; generating a plurality of readout waveforms produced by the plurality of candidate write symbols; analyzing the readout waveforms to determine desired set of readout waveforms; and selecting selected ones of the plurality of candidate write symbols that correspond to the desired readout waveforms to be included in the set of write symbols. The data is written to the medium using the write symbols.

    摘要翻译： 在记录介质上记录数据的方法包括将数据映射到一组写符号，其中每个写符号表示数据的多于一位。 通过定义一组可变写参数来定义写符号集; 生成为所述可变写参数指定不同值的多个候选写符号; 产生由多个候选写符号产生的多个读出波形; 分析读出波形以确定期望的读出波形组; 以及选择与要包括在所述写入符号集合中的期望读出波形相对应的所述多个候选写符号中的所选择的一个。 使用写入符号将数据写入介质。