公开(公告)号：US06295253B1

公开(公告)日：2001-09-25

申请号：US09666549

申请日：2000-09-21

申请人： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Atsushi Yamaguchi ,  Hiroki Ishida

发明人： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Atsushi Yamaguchi ,  Hiroki Ishida

IPC分类号： G11B1100

CPC分类号： G11B20/10 ,  G11B11/1051 ,  G11B11/10515 ,  G11B11/10534 ,  G11B11/1055 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/2525

摘要： When recording a recorded signal consisting of “01011001110” in a magnetooptical recording medium, (1,1) corresponding to a domain of 2T is converted to (1,0,1), and (0,0) is converted to (0,1,0) in the recorded signal. In other words, the first “1” of (1,1) is converted to unit bits “1,0” and the first “0” of (0,0) is converted to unit bits “0,1”. Similarly, the first “1” of (1,1,1) corresponding to a domain of 3T is converted to unit bits “1,0”, and the second “1” is converted to unit bits “1,0”. “1” or “0” of the final unit bit is not converted but recorded as such. Consequently, a signal can be correctly reproduced by extension ally transferring domains having different domain lengths from a recording layer to a reproducing layer under the same reproducing conditions.

摘要翻译： 当在磁光记录介质中记录由“01011001110”组成的记录信号时，对应于2T的域的（1,1）被转换为（1,0,1），（0,0）被转换为（0， 1,0）记录信号。 换句话说，（1,1）的第一个“1”被转换为单位比特“1,0”，（0,0）的第一个“0”被转换为单位比特“0,1”。 类似地，对应于3T的域的（1,1,1）的第一“1”被转换为单位比特“1,0”，第二“1”被转换为单位比特“1,0”。 最终单位位的“1”或“0”不转换而是被记录。 因此，通过在相同的再现条件下将具有不同域长度的域从记录层延伸到再现层，可以正确地再现信号。

公开(公告)号：US06483783B1

公开(公告)日：2002-11-19

申请号：US09713034

申请日：2000-11-16

申请人： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Hiroki Ishida ,  Atsushi Yamaguchi ,  Morio Nakatani

发明人： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Hiroki Ishida ,  Atsushi Yamaguchi ,  Morio Nakatani

IPC分类号： G11B1100

CPC分类号： G11B11/10595 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/1055

摘要： A magnetic head is configured of a core and a coil wound around the core and passing current through the coil in a variable direction allows the core to have an edge generating an alternating magnetic field Hex1 and another edge generating an alternating magnetic field Hex2. Alternating magnetic fields Hex1 and Hex2 are applied to the respective edges. Furthermore, a laser beam LB1 is directed such that its optical axis L01 matches the edge receiving the alternating magnetic field Hex1, and a laser beam LB2 is directed such that its optical axis L02 matches the edge receiving the alternating magnetic field Hex2. A first magneto-optical signal detected through the alternating magnetic field Hex1 and the laser beam LB1 and a second magneto-optical signal detected through the alternating magnetic field Hex2 and the laser beam LB2 are composited together. As such, an alternating magnetic field can be applied to a magneto-optical recording medium at a predetermined angle to an in-plane direction of the recording medium to accurately enlarge a magnetic domains for reproduction.

摘要翻译： 磁头由铁芯和缠绕在磁芯上的线圈构成，并且使电流沿可变方向通过线圈允许磁芯具有产生交变磁场Hex1的边缘，另一边产生交变磁场Hex2。 交替磁场Hex1和Hex2被施加到相应的边缘。 此外，激光束LB1被引导为使得其光轴L01与接收交变磁场Hex1的边缘匹配，并且激光束LB2被引导为使得其光轴L02与接收交变磁场Hex2的边缘匹配。 通过交变磁场Hex1和激光束LB1检测到的第一磁光信号和通过交变磁场Hex2和激光束LB2检测的第二磁光信号被合成在一起。 这样，可以将交变磁场以与记录介质的面内方向成预定角度的方式施加到磁光记录介质，以精确地放大用于再现的磁畴。

公开(公告)号：US06492035B1

公开(公告)日：2002-12-10

申请号：US09530497

申请日：2000-05-01

申请人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Kenichiro Mitani ,  Hitoshi Noguchi

发明人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Kenichiro Mitani ,  Hitoshi Noguchi

IPC分类号： G11B11105

CPC分类号： G11B11/10586 ,  G11B11/10515 ,  G11B11/10584 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/24942

摘要： A magneto-optical recording medium of magnetic domain enlarging/reproducing system including a recording layer and a reproducing layer, a gate layer selectively extracting each magnetic domain within the recording layer is formed on the recording layer, a magnetic field reinforcement layer reinforcing a leakage magnetic field reaching the reproducing layer is formed on the gate layer, and a blocking layer blocking an exchange coupling force from the magnetic field reinforcement layer to the reproducing layer is formed on the magnetic field reinforcement layer.

摘要翻译： 一种包括记录层和再现层的磁畴扩大/再现系统的磁光记录介质，在记录层上形成选择性地提取记录层内的每个磁畴的栅极层，加强漏磁 在栅极层上形成到达再现层的场，并且在磁场强化层上形成阻挡从磁场强化层到再生层的交换耦合力的阻挡层。

公开(公告)号：US06650599B2

公开(公告)日：2003-11-18

申请号：US09922836

申请日：2001-08-07

申请人： Naoyuki Takagi ,  Atsushi Yamaguchi ,  Kenichiro Mitani

发明人： Naoyuki Takagi ,  Atsushi Yamaguchi ,  Kenichiro Mitani

IPC分类号： G11B1100

CPC分类号： G11B7/126 ,  G11B11/10515 ,  G11B11/10595

摘要： A reproducing apparatus reproduces a signal recorded in a magneto-optical disk. The magneto-optical disk includes a layered structure having a recording layer, an intermediate layer and a reproducing layer. Laser light is illuminated from an optical head to the magneto-optical disk in such an intensity that no magnetic domain is transferred from the recording layer to the reproducing layer only by the laser light. In this state, alternating magnetic field is applied through a magnetic head to the magneto-optical disk, thereby concurrently causing transfer and expansion of a magnetic domain to the reproducing layer. As a result, transfer of the magnetic domain is effected with expansion.

摘要翻译： 再现装置再现记录在磁光盘中的信号。 磁光盘包括具有记录层，中间层和再现层的分层结构。 激光从光头照射到磁 - 光盘，其强度使得只有通过激光将磁畴从记录层转移到再现层。 在这种状态下，通过磁头向磁光盘施加交变磁场，从而同时引起磁畴向再现层的转移和扩展。 结果，扩大了磁畴的转移。

公开(公告)号：US06388955B1

公开(公告)日：2002-05-14

申请号：US09381498

申请日：1999-09-22

申请人： Naoyuki Takagi ,  Atsushi Yamaguchi ,  Kenichiro Mitani

发明人： Naoyuki Takagi ,  Atsushi Yamaguchi ,  Kenichiro Mitani

IPC分类号： G11B1100

CPC分类号： G11B7/126 ,  G11B11/10515 ,  G11B11/10595

摘要： A reproducing apparatus reproduces a signal recorded in a magneto-optical disk. The magneto-optical disk includes a layered structure having a recording layer, an intermediate layer and a reproducing layer. Laser light is illuminated from an optical head to the magneto-optical disk in such an intensity that no magnetic domain is transferred from the recording layer to the reproducing layer only by the laser light. In this state, alternating magnetic field is applied through a magnetic head to the magneto-optical disk, thereby concurrently causing transfer and expansion of a magnetic domain to the reproducing layer. As a result, transfer of the magnetic domain is effected with expansion.

摘要翻译： 再现装置再现记录在磁光盘中的信号。 磁光盘包括具有记录层，中间层和再现层的分层结构。 激光从光头照射到磁 - 光盘，其强度使得只有通过激光将磁畴从记录层转移到再现层。 在这种状态下，通过磁头向磁光盘施加交变磁场，从而同时引起磁畴向再现层的转移和扩展。 结果，扩大了磁畴的转移。

公开(公告)号：US06370089B1

公开(公告)日：2002-04-09

申请号：US09208853

申请日：1998-12-10

申请人： Atsushi Yamaguchi ,  Kenichiro Mitani

发明人： Atsushi Yamaguchi ,  Kenichiro Mitani

IPC分类号： G11B1100

CPC分类号： G11B11/10586 ,  G11B11/10515

摘要： A magneto-optical recording medium including a substrate, a reproducing layer formed on the substrate, an intermediate layer formed on the reproducing layer, a recording layer formed on the intermediate layer and a high magnetization layer formed on the recording layer. The intermediate layer is made of a non-magnetic material, and set at a prescribed thickness so that a leakage magnetic field from the recording layer to the reproducing layer is so distributed that the intensity thereof is increased from an end to the center of its domain. The high magnetization layer is made of an alloy or a multilayer film of a noble metal and a transition metal having saturation magnetization stronger than that of the recording layer under a reproducing temperature. At room temperature, the coercive force of the recording layer is larger than that of the high magnetization layer. Consequently, transfer/enlargement from the recording layer to the reproducing layer is readily caused in this magneto-optical recording medium.

摘要翻译： 包括基板，形成在基板上的再现层，形成在再现层上的中间层，形成在中间层上的记录层和形成在记录层上的高磁化层的磁光记录介质。 中间层由非磁性材料制成，并且设定为规定的厚度，使得从记录层到再现层的泄漏磁场如此分布，使得其强度从其端部到其中心部分增加 。 高磁化层由在再生温度下具有比记录层的饱和磁化强度更高的贵金属和过渡金属的合金或多层膜制成。 在室温下，记录层的矫顽力大于高磁化层的矫顽力。 因此，在该磁光记录介质中容易引起从记录层到再现层的传送/放大。

公开(公告)号：US06298026B1

公开(公告)日：2001-10-02

申请号：US09401790

申请日：1999-09-22

申请人： Yoshihisa Suzuki ,  Sayoko Tanaka ,  Kenichiro Mitani

发明人： Yoshihisa Suzuki ,  Sayoko Tanaka ,  Kenichiro Mitani

IPC分类号： G11B700

CPC分类号： B82Y10/00 ,  G11B7/0956 ,  G11B7/1365 ,  G11B7/1372 ,  G11B7/1387 ,  G11B11/10534 ,  G11B11/10541 ,  G11B11/10554 ,  G11B11/1058

摘要： A magneto-optical head includes an optical member, objective lens, SIL and coil. The magneto-optical head converts a laser beam to an evanescent light and directs it to a magneto-optical recording medium. Further, the magneto-optical head applies a magnetic field to the magneto-optical recording medium. When tilt is caused, it decreases the tilt angle. The optical member refracts the laser beam to a prescribed direction to be directed to the objective lens when the laser beam is displaced from a designed optical axis. The objective lens allows the laser beam to be focused onto a point on an end face of the SIL. Further, the SIL emits the evanescent light. The optical member is arranged in contact with the optical member. As a result, a signal can accurately be recorded or reproduced even when tilt is caused to an optical disk while alleviating the problem associated with the tilt.

摘要翻译： 磁光头包括光学构件，物镜，SIL和线圈。 磁光头将激光束转换成渐逝光，并将其引导到磁光记录介质。 此外，磁光头向磁光记录介质施加磁场。 当发生倾斜时，会降低倾斜角度。 当激光束从设计的光轴位移时，光学构件将激光束折射到规定的方向以指向物镜。 物镜允许激光束聚焦到SIL的端面上的一个点上。 此外，SIL发出ev逝的光。 光学构件布置成与光学构件接触。 结果，即使在缓和与倾斜相关的问题的同时光盘的倾斜的情况下也能够准确地记录或再现信号。

公开(公告)号：US06256266B1

公开(公告)日：2001-07-03

申请号：US09382672

申请日：1999-08-25

申请人： Kenichiro Mitani

发明人： Kenichiro Mitani

IPC分类号： G11B1100

CPC分类号： G11B27/24 ,  G11B7/007 ,  G11B7/00745 ,  G11B11/10578 ,  G11B11/10584 ,  G11B27/19 ,  G11B2220/2525

摘要： A magneto-optical recording medium has a plane structure in which are alternately arranged a groove having discontinuous regions formed at every 120 &mgr;m, for example, and land having discontinuous regions formed at the same every 120 &mgr;m. The position where the discontinuous region of the groove is formed differs from the position where the discontinuous region of the land is formed. The discontinuous region of the land is provided at a position corresponding to substantially the middle of respective continuous regions of the groove. The discontinuous region of the groove is provided at a position corresponding to substantially the center of the continuous region of the land. The width of the groove and land is approximately 0.4 &mgr;m. Therefore, a synchronizing signal arising from a discontinuous region formed periodically at the groove or land can be output properly even when the width of the groove and land is narrowed.

摘要翻译： 磁光记录介质具有平面结构，其平面结构交替地布置有例如每120μm形成的具有不连续区域的凹槽，并且具有每120μm形成的具有不连续区域的平台。 形成槽的不连续区域的位置与形成焊盘的不连续区域的位置不同。 脊的不连续区域设置在与凹槽的相应连续区域的大致中间相对应的位置处。 凹槽的不连续区域设置在大致对应于平台的连续区域的中心的位置处。 槽和焊盘的宽度约为0.4μm。 因此，即使当槽和焊盘的宽度变窄时，也可以适当地输出由在槽或焊盘周期性地形成的不连续区域产生的同步信号。

公开(公告)号：US20070171288A1

公开(公告)日：2007-07-26

申请号：US10594151

申请日：2005-03-01

申请人： Yasuaki Inoue ,  Akiomi Kunisa ,  Kenichiro Mitani ,  Kousuke Tsujita ,  Satoru Takeuchi

发明人： Yasuaki Inoue ,  Akiomi Kunisa ,  Kenichiro Mitani ,  Kousuke Tsujita ,  Satoru Takeuchi

IPC分类号： H04N5/217

CPC分类号： G06T1/0064 ,  G06T3/00 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0083 ,  H04N1/32144 ,  H04N1/32352 ,  H04N1/387

摘要： A capturing unit captures and digitizes a printed image having an electronic watermark embedded therein and a lattice pattern image. A profile creation unit detects position deviations of intersections in the lattice pattern images captured at respective different zoom magnifications, generates correction information on distortion occurring in the images, and registers the correction information into a profile database in association with the zoom magnifications. An image correction unit selects correction information corresponding to a zoom magnification employed at the time of capturing of the printed image from the profile database, and corrects distortion occurring in the captured image of the printed image. An image area determination unit determines an original image area in the distortion-corrected captured image. A watermark extraction unit extracts watermark information from the original image area in the distortion-corrected captured image.

摘要翻译： 捕获单元捕获并数字化其中嵌入有电子水印的打印图像和格子图案图像。 轮廓创建单元检测在各个不同变焦倍率下捕获的格子图案图像中的交点的位置偏差，产生关于图像中出现的失真的校正信息，并将校正信息与变焦放大率相关联地登记到轮廓数据库中。 图像校正单元从轮廓数据库中选择与拍摄打印图像时的变焦倍率对应的校正信息，并校正在打印图像的拍摄图像中发生的失真。 图像区域确定单元确定失真校正的捕获图像中的原始图像区域。 水印提取单元从失真校正的拍摄图像中的原始图像区域提取水印信息。