公开(公告)号：US07184381B2

公开(公告)日：2007-02-27

申请号：US10736572

申请日：2003-12-17

申请人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuuji Nagai

发明人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuuji Nagai

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10296 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/218

摘要： In order to evaluate the quality of a signal recorded on an optical recording medium, a target signal is obtained based on a predetermined data string and a predetermined partial response characteristic, and for each clock cycle, an equalization error is calculated that is a difference between the target signal and a signal reproduced each clock cycle. Further, the product of the equalization errors calculated at different times is obtained, and based on the obtained product, the quality of a signal is evaluated.

摘要翻译： 为了评估记录在光学记录介质上的信号的质量，基于预定数据串和预定的部分响应特性获得目标信号，并且对于每个时钟周期，计算均衡误差，该均衡误差是 目标信号和每个时钟周期再生的信号。 此外，获得在不同时间计算的均衡误差的乘积，并且基于获得的乘积来评估信号的质量。

公开(公告)号：US20060072410A1

公开(公告)日：2006-04-06

申请号：US10528507

申请日：2003-09-19

申请人： Masatsugu Ogawa

发明人： Masatsugu Ogawa

IPC分类号： G11B7/12

CPC分类号： G11B7/1267 ,  G11B7/00454

摘要： A laser power selecting method includes the steps of recording an asymmetry measuring recording pattern in an optical disk trial-writing area while a laser power is being changed, reproducing a signal from the trial-writing area to calculate an asymmetry value from the waveform of the reproduced signal, determining the change rate of asymmetry from the relation between a laser power when the recording pattern is recorded and the calculated asymmetry value, and setting a laser power, at which the determined change rate of an asymmetry value is maximum, as a recording power used when recording on an optical disk.

摘要翻译： 激光功率选择方法包括以下步骤：在激光功率改变的同时在光盘试写区域中记录不对称测量记录图案，再现来自试写区的信号，以从 再现信号，根据记录图案被记录的激光功率与计算的不对称值之间的关系确定不对称的变化率，以及设定所确定的不对称值的最大变化率为最大的激光功率作为记录 在光盘上录制时使用的电源。

公开(公告)号：US06925049B2

公开(公告)日：2005-08-02

申请号：US10092105

申请日：2002-03-06

申请人： Masatsugu Ogawa

发明人： Masatsugu Ogawa

IPC分类号： G11B7/24 ,  G11B7/007 ,  G11B27/19 ,  G11B27/24 ,  G11B7/05

CPC分类号： G11B27/24 ,  G11B7/007 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2525 ,  G11B2220/2529 ,  G11B2220/2545 ,  G11B2220/2562

摘要： In a wobble-format type optical recording medium 10 involving a guide groove 11 wherein the guide groove is allowed to meander over substantially the whole length thereof to form wobble, and wobbled intermittent sections 12 where there are no meandrous area are placed at predetermined positions in the wobble; a first wobbled intermittent section 12a for determining reference position is disposed at at least one reference position A in the optical recording medium, and furthermore, a second wobbled intermittent section 12b is disposed selectively at each predetermined position B apart from each reference position by a predetermined distance.

摘要翻译： 在包括引导槽11的摆动格式型光学记录介质10中，其中允许引导槽在其整个长度上曲折以形成摆动，并且在没有蜿蜒的区域的摆动间歇部分12被放置在 摇摆 用于确定基准位置的第一摆动间歇部分12a设置在光学记录介质中的至少一个基准位置A处，此外，第二摆动间歇部分12b选择性地设置在每个参考位置之外的每个预定位置B处， 预定距离。

公开(公告)号：US20050117504A1

公开(公告)日：2005-06-02

申请号：US10997897

申请日：2004-11-29

申请人： Masatsugu Ogawa ,  Shuichi Ohkubo

发明人： Masatsugu Ogawa ,  Shuichi Ohkubo

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/095 ,  G11B20/10

CPC分类号： G11B7/0956 ,  G11B7/005 ,  G11B20/10009

摘要： In a method of obtaining a reproduction signal with good quality from a data recording medium, two actual signals are generated as first and second signals I1 and I2 from detection signals obtained from the data recording medium. A coefficient k which has linear correlation with a tilt is calculated based on the first and second signals I1 and I2. A reproduction signal in which influence of the tilt is eliminated, is reproduced by using the coefficient k and the first and second signals I1 and I2.

摘要翻译： 在从数据记录介质获得质量良好的再现信号的方法中，从获得的检测信号中产生两个实际信号作为第一和第二信号I 1和I 2 2 从数据记录介质。 基于第一和第二信号I 1和I 2 2计算与倾斜线性相关的系数k。 通过使用系数k和第一和第二信号I 1和I 2 2再现消除了倾斜影响的再现信号。

公开(公告)号：US5917799A

公开(公告)日：1999-06-29

申请号：US82372

申请日：1998-05-20

申请人： Masafumi Nakada ,  Masatsugu Ogawa

发明人： Masafumi Nakada ,  Masatsugu Ogawa

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

CPC分类号： G11B11/10515

摘要： In a magneto-optical recording medium which includes a guide groove portion having a land area, a groove area, and a boundary area between the land area and the groove area, both of the land area and the groove area may have a V-shaped cross-section. At least one of the land area and the groove area may have a protruding portion which is formed in parallel to the guide groove portion and which has a width which is less than a half of a wavelength of a read laser beam.

摘要翻译： 在包括具有焊盘区域，沟槽区域和焊盘区域和沟槽区域之间的边界区域的引导槽部分的磁光记录介质中，焊盘区域和沟槽区域两者可以具有V形 横截面。 所述区域区域和所述沟槽区域中的至少一个可以具有与所述引导槽部平行的宽度小于读取的激光的波长的一半的突出部。

公开(公告)号：US5781524A

公开(公告)日：1998-07-14

申请号：US785169

申请日：1997-01-13

申请人： Masatsugu Ogawa

发明人： Masatsugu Ogawa

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10543 ,  G11B7/1365 ,  G11B7/1369

摘要： A magneto-optical (MO) head has a pair of Faraday rotators between a polarizing beam splitter (PBS) and an objective lens for focusing light onto a MO disk. The pair of Faraday rotators rotate the direction of polarization of the light by 90.degree. or pass the same as it is depending on the data area where data are read by the optical head. This enables the MO head for reproducing data recorded by a land-groove technique to reduce output level difference and cross-talk between a land area and a groove area, thereby improving C/N of the reproduced signal.

摘要翻译： 磁光（MO）头在偏振分束器（PBS）和用于将光聚焦到MO盘上的物镜之间具有一对法拉第旋转器。 一对法拉第旋转器将光的偏振方向旋转90度，或根据光学头读取数据的数据区域相同。 这使得MO头用于再现通过纹间沟技术记录的数据，以减小纹间区域和凹槽区域之间的输出电平差和串扰，从而改善再现信号的C / N。

公开(公告)号：US5724339A

公开(公告)日：1998-03-03

申请号：US621478

申请日：1996-03-25

申请人： Masatsugu Ogawa

发明人： Masatsugu Ogawa

IPC分类号： G11B11/10 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24 ,  G11B11/105

CPC分类号： G11B7/24085 ,  G11B7/005 ,  G11B7/24 ,  G11B7/24088 ,  G11B7/24079

摘要： The present invention provides a light-reproduction medium, data stored therein being reproduced by detecting light transmitted therethrough and/or light reflected therefrom, including (a) a substrate formed on a surface thereof with at least two recording pits having different level from the surface of the substrate, each of the recording pits having a cross-section selected from at least two different shapes, the cross-section being defined as viewed in a direction perpendicular to a direction in which the light-reproduction medium is moved relative to an optical head, and (b) a magnetic film formed on the surface of the substrate. The present invention provides high density without improving mastering technology. That is, the present invention provides a light-reproduction medium having memory density several times greater than a conventional CD-ROM without changing CD-ROM fabrication technique, driving method and an optical head structure, resulting in significantly increased capacity of an optical disc or an optical card.

摘要翻译： 本发明提供了一种光再现介质，其中存储的数据通过检测透过其的光和/或从其反射的光而被再现，包括（a）在其表面上形成有与表面不同的至少两个记录凹坑的基底 每个记录凹坑具有选自至少两种不同形状的横截面，该横截面被定义为在与光再现介质相对于光学方向移动的方向垂直的方向上观察 头部，（b）形成在基板表面上的磁性膜。 本发明提供高密度而不改进母盘制作技术。 也就是说，本发明提供一种具有比常规CD-ROM大几倍的存储密度的光再现介质，而不改变CD-ROM制造技术，驱动方法和光头结构，导致光盘的容量显着增加或 一张光卡。

公开(公告)号：US20140094935A1

公开(公告)日：2014-04-03

申请号：US14118718

申请日：2012-05-01

申请人： Masatsugu Ogawa ,  Atsuhiro Tanaka ,  Yuma Matsuda ,  Masafumi Yano

发明人： Masatsugu Ogawa ,  Atsuhiro Tanaka ,  Yuma Matsuda ,  Masafumi Yano

IPC分类号： G05B13/02

CPC分类号： G06Q10/06 ,  G05B13/02 ,  G06Q10/04

摘要： An object is to provide a system in which components can overall operate in concert with one another by using only functions about the components, without using the theory of probability. The system includes a plurality of function blocks correlated to one another. The plurality of function blocks each include: a storing unit including an evaluation function that is associated with its own function block; a profit maximization control unit for adjusting the operation level of its own function block by information about the evaluation function of another of the plurality of function blocks that has a relation with its own function block; an activation/shutdown problem solution control unit for adjusting a suppression of the operation level by profit maximization control based on an active state/shutdown state of its own function block; and a restraint condition fulfillment control unit for adjusting the operation level of its own function block based on a restraint condition that is to be fulfilled by its own function block and all of the plurality of function blocks together.

摘要翻译： 目的是提供一种系统，其中组件可以通过仅使用关于组件的功能来相互协调地整体地操作，而不使用概率论。 该系统包括彼此相关的多个功能块。 多个功能块各自包括：存储单元，包括与其自己的功能块相关联的评估功能; 利用最大化控制单元，用于通过关于与其自己的功能块具有关系的多个功能块中的另一个的评估功能的信息来调整其自身功能块的操作级别; 激活/关闭问题解决方案控制单元，用于基于其自身功能块的活动状态/关闭状态通过利润最大化控制来调整对操作级别的抑制; 以及约束条件执行控制单元，用于基于由其自身的功能块和所有多个功能块将要满足的约束条件来调整其自身的功能块的操作级别。

公开(公告)号：US07586625B2

公开(公告)日：2009-09-08

申请号：US11795130

申请日：2006-01-13

申请人： Tohru Kanegae ,  Masatsugu Ogawa ,  Masahiro Kato ,  Eisaku Kawano ,  Masahiro Miura

发明人： Tohru Kanegae ,  Masatsugu Ogawa ,  Masahiro Kato ,  Eisaku Kawano ,  Masahiro Miura

IPC分类号： G01B11/14

CPC分类号： G11B7/268 ,  G11B7/00375 ,  G11B7/24038 ,  G11B27/36 ,  G11B2007/0013 ,  G11B2220/237

摘要： A position verifying apparatus is provided with: a first recording device for recording the information into a first area of the first recording layer; a second recording device for recording a part of the information by laser light which has penetrated the first area and for recording another part of the information by laser light which does not penetrate the first area, into a second area of the second recording layer including at least a partial area which faces the first area; a reproducing device for reproducing the information; and a judging device for judging whether or not the relative shift is within tolerance, on the basis of a transit position at which reproduction quality transits from the reproduction quality indicated by the part of the information reproduced to the reproduction quality indicated by the another part of the information reproduced.

摘要翻译： 位置验证装置设置有：第一记录装置，用于将信息记录到第一记录层的第一区域中; 第二记录装置，用于通过已经穿过第一区域的激光记录信息的一部分，并且通过不穿透第一区域的激光将另一部分信息记录到包括在第二区域的第二记录层的第二区域中 至少部分区域面向第一区域; 用于再现信息的再现装置; 以及判断装置，用于基于再现质量从由再现的信息的一部分指示的再现质量转换到另一部分所指示的再现质量的转移位置来判断相对偏移是否在容差内 信息转载。

公开(公告)号：US07471601B2

公开(公告)日：2008-12-30

申请号：US11143996

申请日：2005-06-03

申请人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

发明人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/1263 ,  G11B7/1267 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2220/2537

摘要： In an optical disk system using a PRML identification system, a method for deriving an optimum recording wave in a short period of time is provided. Parameters of the recording wave are adjusted by using an evaluation value obtained by a signal evaluation method which is suitable for the PRML identification system as an index. In this case, as a parameter adjusting method, a plurality of adjusting methods are utilized.

摘要翻译： 在使用PRML识别系统的光盘系统中，提供了用于在短时间内导出最佳记录波的方法。 通过使用通过适合于PRML识别系统的信号评估方法获得的评估值作为指标来调整记录波的参数。 在这种情况下，作为参数调整方法，利用多种调整方法。