公开(公告)号：US06178143B1

公开(公告)日：2001-01-23

申请号：US09258180

申请日：1999-02-25

申请人： Junji Hirokane ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Junji Hirokane ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10586

摘要： A magneto-optical recording medium has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in temperature. When the magneto-optical recording medium is irradiated with a light beam, the readout layer separates into three regions: a region in an in-plane magnetization state, a region in a perpendicular magnetization state, and a region having a temperature not lower than the Curie temperature thereof. Only the region in the perpendicular magnetization state allows copying of the magnetization of the recording layer. Therefore, even when the diameter and intervals of recording bits on the recording layer are very small, it is possible to reproduce a target recording bit separately from a recording bit adjacent to the target recording bit.

摘要翻译： 磁光记录介质具有由垂直磁化膜制成的记录层和在室温下处于平面内磁化状态并随温度升高而变为垂直磁化状态的读出层。 当磁光记录介质被光束照射时，读出层分为三个区域：面内磁化状态的区域，垂直磁化状态的区域和温度不低于 居里温度。 只有垂直磁化状态的区域才允许复制记录层的磁化。 因此，即使当记录层上的记录位的直径和间隔非常小时，也可以与目标记录位相邻的记录位分开再现目标记录位。

公开(公告)号：US5985436A

公开(公告)日：1999-11-16

申请号：US935395

申请日：1997-09-23

申请人： Junji Hirokane ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Junji Hirokane ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10508 ,  G11B11/10591 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium including at least a recording layer, and an auxiliary recording layer which achieves magnetostatic coupling with the recording layer. The auxiliary recording layer is in an in-plane magnetization state at temperatures lower than a recording temperature, and in a perpendicular magnetization state at temperatures not lower than the recording temperature. It is therefore possible to achieve a decrease in a recording magnetic field.

摘要翻译： 至少包括记录层的磁光记录介质和与记录层实现静磁耦合的辅助记录层。 辅助记录层在低于记录温度的温度下处于平面内磁化状态，并且在不低于记录温度的温度下处于垂直磁化状态。 因此，可以实现记录磁场的减小。

公开(公告)号：US5933411A

公开(公告)日：1999-08-03

申请号：US890401

申请日：1997-07-09

申请人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/24 ,  G11B7/26 ,  G11B11/105

CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582 ,  G11B7/0938 ,  G11B7/24

摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.

摘要翻译： 光盘具有地址记录部分，每个地址记录部分具有凹槽的一个侧壁的摆动部分。 每个地址记录部分通过在相邻的凸台中提供凹槽的凸起来形成，以便加宽凹槽。 由于以这样提供的摆动形式为凹凸形式，所以记录地址信息。 此外，这样设置在凹槽中的地址记录部分在光盘的径向上线性地设置。 通过这样布置记录有槽和/或焊盘信息的光盘，不会发生重放信息信号中的摆动频率分量的混合，扇区方法可应用于光盘，并且可以获得高质量的信息信号。

公开(公告)号：US5768218A

公开(公告)日：1998-06-16

申请号：US803274

申请日：1997-02-20

申请人： Junichiro Nakayama ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Junichiro Nakayama ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

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

CPC分类号： G11B11/10584 ,  G11B11/10586 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521

摘要： A magneto-optical recording medium has a transparent substrate, a first magnetic layer, first intermediate layer, a second magnetic layer, and a third magnetic layer provided in this order. The first magnetic layer has an in-plane magnetization at room temperature, while a transition from the in-plane magnetization to a perpendicular magnetization occurs to the first magnetic layer with a temperature rise. The first intermediate layer is made of a non-magnetic substance. The second magnetic layer is a film having a perpendicular magnetization. The third magnetic layer is a film having a perpendicular magnetization, has a coercive force smaller than that of the second magnetic layer at room temperature, and has a Curie temperature higher than that of the second magnetic layer. The light intensity modulation overwriting method is applicable to the magneto-optical recording medium thus arranged, superior reproduction signal characteristics can be obtained with respect to this magneto-optical recording medium, and reproduction can be carried out with respect to the recording medium even though it has recording bits whose each diameter is smaller than that of a light beam. Thus it is possible to provide the magneto-optical recording medium suitable for high density recording.

摘要翻译： 磁光记录介质具有依次设置的透明基板，第一磁性层，第一中间层，第二磁性层和第三磁性层。 第一磁性层在室温下具有平面内的磁化强度，而从第一磁性层的温度上升发生从面内磁化向垂直磁化的转变。 第一中间层由非磁性物质制成。 第二磁性层是具有垂直磁化强度的膜。 第三磁性层是具有垂直磁化的膜，在室温下的矫顽力小于第二磁性层的矫顽力，并且居里温度高于第二磁性层的居里温度。 光强度调制重写方法适用于如此布置的磁光记录介质，可以获得相对于该磁光记录介质的优良再现信号特性，并且可以相对于记录介质进行再现，即使它 具有每个直径小于光束直径的记录位。 因此，可以提供适合于高密度记录的磁光记录介质。

公开(公告)号：US07337454B2

公开(公告)日：2008-02-26

申请号：US10407038

申请日：2003-04-03

申请人： Hideharu Tajima ,  Nobuyuki Takamori ,  Akira Takahashi ,  Yoshiteru Murakami

发明人： Hideharu Tajima ,  Nobuyuki Takamori ,  Akira Takahashi ,  Yoshiteru Murakami

IPC分类号： G11B23/03

CPC分类号： G11B23/0308

摘要： A disc cartridge of the present invention is provided with a protrusion section on a shutter sliding surface so as to surround at least part of an opening. Moreover, a shutter for opening and closing the opening is provided with a shielding section for covering the opening and the protrusion section and a sliding surface for sliding on a shutter sliding surface during opening and closing operations of the shutter.

摘要翻译： 本发明的盘盒在活门滑动面上设置有一个围绕开口的至少一部分的突出部分。 此外，用于打开和关闭开口的快门设置有用于覆盖开口和突出部分的屏蔽部分和用于在快门的打开和关闭操作期间在快门滑动表面上滑动的滑动表面。

公开(公告)号：US06295271B1

公开(公告)日：2001-09-25

申请号：US09475414

申请日：1999-12-30

申请人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Tetsuya Inui ,  Hideaki Sato ,  Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B724

CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582

摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.

摘要翻译： 光盘具有地址记录部分，每个地址记录部分具有凹槽的一个侧壁的摆动部分。 每个地址记录部分通过在相邻的凸台中提供凹槽的凸起来形成，以便加宽凹槽。 由于以这样提供的摆动形式为凹凸形式，所以记录地址信息。 此外，这样设置在凹槽中的地址记录部分在光盘的径向上线性地设置。 通过这样布置记录有槽和/或焊盘信息的光盘，不会发生重放信息信号中的摆动频率分量的混合，扇区方法可应用于光盘，并且可以获得高质量的信息信号。

公开(公告)号：US06122233A

公开(公告)日：2000-09-19

申请号：US15011

申请日：1998-01-28

申请人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

发明人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B11/105 ,  G11B7/09

CPC分类号： G11B7/00745 ,  G11B11/10563 ,  G11B11/10565 ,  G11B7/00718

摘要： In an optical disk, grooves and lands serving as recording tracks are provided, the grooves are shaped so as to have virtually the same width, and in a first region, the two side walls of each groove wind in accordance with address information. The first region of the groove is formed with its leading portion located at the same angular position as the leading portion of at least one of the first regions of the adjacent grooves. Moreover, the winding portions corresponding to respective bits of the address information are formed in a manner so as to synchronize to the adjacent grooves. With this arrangement, it becomes possible to easily detect address information from the grooves and lands, and consequently to obtain an information reproducing signal with high quality.

摘要翻译： 在光盘中，设置有用作记录轨迹的凹槽和凹槽，这些凹槽成形为具有实质上相同的宽度，并且在第一区域中，每个凹槽的两个侧壁根据地址信息而变风。 凹槽的第一区域形成有其前端部分位于与相邻凹槽的第一区域中的至少一个的前端部分相同的角位置。 此外，与地址信息的各个位对应的绕组部分以与相邻槽同步的方式形成。 利用这种布置，可以容易地从凹槽和平台检测地址信息，从而获得高质量的信息再现信号。

公开(公告)号：US5909412A

公开(公告)日：1999-06-01

申请号：US977206

申请日：1997-11-24

申请人： Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B27/19 ,  G11B27/30 ,  G11B17/22

CPC分类号： G11B7/24082 ,  G11B27/19 ,  G11B27/3027 ,  G11B7/0903 ,  G11B7/0938

摘要： In a method for reproducing an optical disk of the present invention, address information of an optical disk, provided with tracking guides composed of (1) a wobbling groove wobbled in accordance with address information and (2) a normal groove which is not wobbled, is reproduced. The wobbling groove and the normal groove are alternately provided in a radius direction of the optical disk. When carrying out recording and reproducing of the optical disk, three beams composed of one main beam and two sub beams are used. The three beams are projected so that (a) the sub beams are respectively on the wobbling groove and the normal groove and (b) the main beam is on a land between the wobbling groove and the normal groove. The address information is found from reflected light of one of the sub beams. The above arrangement allows respective central portions of the sub beams to track the tracking guides. Therefore, even in the case where the optical disk is tilted or vibrated, the sub beams do not deviate totally off the tracking guides, thereby permitting to stably reproduce the address information.

摘要翻译： 在本发明的再现光盘的方法中，具有由（1）根据地址信息摆动的摆动槽和（2）未摆动的正常槽构成的跟踪引导件的光盘的地址信息， 被转载。 在光盘的半径方向交替设置摆动槽和法线槽。 当执行光盘的记录和再现时，使用由一个主光束和两个子光束组成的三个光束。 这三个光束被投影，使得（a）子光束分别位于摆动槽和普通槽上，（b）主光束位于摆动槽和正常槽之间的焊盘上。 从一个子光束的反射光中找到地址信息。 上述布置允许子光束的各个中心部分跟踪跟踪引导件。 因此，即使在光盘倾斜或振动的情况下，子光束也不完全偏离跟踪引导件，从而允许稳定地再现地址信息。

公开(公告)号：US08760784B2

公开(公告)日：2014-06-24

申请号：US13157646

申请日：2011-06-10

申请人： Toshihiko Sakai ,  Yoshiteru Murakami

发明人： Toshihiko Sakai ,  Yoshiteru Murakami

IPC分类号： G11B5/09

CPC分类号： G11B5/02 ,  B82Y10/00 ,  G11B5/746 ,  G11B2005/0005

摘要： Disclosed is a magnetic recording/reproduction device 2 including: a recording/reproduction head 7; and a recording/reproduction head 7 for detecting a leakage magnetic field of each of the plurality of magnetic recording cells 1 so as to reproduce information, the recording/reproduction head 7 carrying out the recording on the magnetic recording medium 4 so that the magnetic recording medium 4 includes continuous recording regions that (i) satisfy Nmin≧2 and that (ii) include a continuous recording region that satisfies N≠n×Nmin, where N represents a number of magnetic recording cells 1 in a continuous recording region; Nmin represents a minimum value for N; and n represents a positive integer, the continuous recording regions each being a region on a reproduction track in which region magnetic recording cells 1 sharing an identical magnetization direction are sequentially arranged in a circumferential direction of the magnetic recording medium 4.

摘要翻译： 公开了一种磁记录/再现装置2，包括：记录/再现头7; 以及记录/再现头7，用于检测多个磁记录单元1中的每个磁记录单元1的泄漏磁场以再现信息，记录/再现头7在磁记录介质4上执行记录，使得磁记录 介质4包括（i）满足Nmin≥2并且（ii）包括满足N≠n×Nmin的连续记录区域的连续记录区域，其中N表示连续记录区域中的磁记录单元1的数量; Nmin表示N的最小值; 并且n表示正整数，连续记录区域各自是在磁记录介质4的圆周方向上顺序地布置有共享相同磁化方向的区域磁记录单元1的再现轨道上的区域。

公开(公告)号：US08264917B2

公开(公告)日：2012-09-11

申请号：US12225597

申请日：2007-03-19

申请人： Ikuo Nakano ,  Yoshiteru Murakami

发明人： Ikuo Nakano ,  Yoshiteru Murakami

IPC分类号： G11B11/00

CPC分类号： G11B5/09 ,  G11B2005/0021

摘要： According to the present invention, heat generation amount control information for controlling a heat generation amount of a heat generating section (20) is arranged to correspond to each of temperatures so that a predetermined heat generation amount is obtained at each of the temperatures. The present invention includes a first computing section (41) that controls the heat generation amount of the heat generating section (20) according to the heat generation amount control information that is arranged in advance to correspond to temperature information that is obtained from a temperature sensor (13). This easily makes it possible to appropriately carry out at least either recording or reproduction with respect to a magnetic recording medium.

摘要翻译： 根据本发明，用于控制发热部分（20）的发热量的发热量控制信息被布置成对应于每个温度，使得在每个温度下获得预定的发热量。 本发明包括：第一计算部（41），其根据与从温度传感器获得的温度信息对应地预先配置的发热量控制信息来控制发热部（20）的发热量 （13）。 这容易使得可以适当地执行关于磁记录介质的记录或再现。