公开(公告)号：US5115424A

公开(公告)日：1992-05-19

申请号：US301329

申请日：1989-01-23

申请人： Hajime Nakajima ,  Isao Watanabe ,  Kunimaro Tanaka

发明人： Hajime Nakajima ,  Isao Watanabe ,  Kunimaro Tanaka

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

CPC分类号： G11B7/24076 ,  G11B11/10584 ,  G11B7/24079 ,  G11B7/24085 ,  G11B11/10578

摘要： An optical type information record carrier is disclosed which includes an arrangement wherein the depth of the guide grooves is selected to be about (2N+1).lambda./8n (N=1, 2, 3, . . . ) and the inclination angle of the wall surface of the carrier is steep enough to ensure that the information recording medium will not adhere to the wall surface of the guide grooves, or will only adhere very weakly if it does adhere. Thermal conduction at the wall surface of the guide grooves is prevented so that extension of the recording bits is restricted.

摘要翻译： 公开了一种光学型信息记录载体，其包括一种布置，其中导槽的深度选择为约（2N + 1）λ/ 8n（N = 1,2,3，...）和倾斜角 载体的壁表面足够陡峭，以确保信息记录介质不会粘附到导向槽的壁表面，或者如果它粘附，则仅粘附得非常弱。 防止引导槽的壁面处的导热，使得记录位的延伸受到限制。

公开(公告)号：US5528565A

公开(公告)日：1996-06-18

申请号：US392535

申请日：1995-02-23

申请人： Isao Watanabe ,  Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yosimoto ,  Kunimaro Tanaka ,  Kazuhiko Tsutsumi

发明人： Isao Watanabe ,  Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yosimoto ,  Kunimaro Tanaka ,  Kazuhiko Tsutsumi

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10506 ,  G11B11/105 ,  G11B11/10536 ,  G11B11/10552 ,  G11B11/10584 ,  G11B11/10586

摘要： A magneto-optic recording system uses a unit recording medium having on a substrate a first magnetic layer whose Curie temperature is low and also having on the first magnetic layer a second magnetic layer whose Curie temperature is high. The system heats a spot on the medium with a heating device. The system may employ two such unit recording media, each having the second magnetic layer magnetized in one direction. The two unit recording media are superposed on each other and formed integrally so as to obtain a magneto-optic recording medium in which the amount of information recorded and the recording speed are doubled. In addition, a light-emitting device and a magnetic field generator are added to the magneto-optic recording medium to obtain a compact magneto-optic recording system with a low level of power consumption.

摘要翻译： 磁光记录系统使用在基板上具有居里温度低的第一磁性层并且在第一磁性层上具有居里温度高的第二磁性层的单元记录介质。 该系统用加热装置加热介质上的一个点。 该系统可以采用两个这样的单元记录介质，每个记录介质具有在一个方向上被磁化的第二磁性层。 两个单元记录介质彼此重叠并且一体地形成，以便获得其中记录的信息量和记录速度加倍的磁光记录介质。 另外，向磁光记录介质添加发光装置和磁场发生器，以获得具有低功耗水平的紧凑型磁光记录系统。

公开(公告)号：US5481508A

公开(公告)日：1996-01-02

申请号：US443031

申请日：1995-05-17

申请人： Isao Watanabe ,  Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yosimoto ,  Kunimaro Tanaka ,  Kazuhiko Tsutsumi

发明人： Isao Watanabe ,  Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yosimoto ,  Kunimaro Tanaka ,  Kazuhiko Tsutsumi

IPC分类号： G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10506 ,  G11B11/105 ,  G11B11/10536 ,  G11B11/10552 ,  G11B11/10584 ,  G11B11/10586

摘要： A unit recording medium, having on a substrate a first magnetic layer whose Curie temperature is low and also having on the first magnetic layer a second magnetic layer whose Curie temperature is high, is heated by a heating device. After two such unit recording media each having the second magnetic layer magnetized in one direction are fabricated, and the fabricated two unit recording media are superposed on each other and formed integrally so as to obtain a magneto-optic recording recording medium in which the amount of information recorded and the recording speed are doubled. In addition, a light-emitting device and a magnetic field generator are added to the magneto-optic recording medium to obtain a compact magneto-optic recording system with a low level of power consumption.

摘要翻译： 在基板上具有居里温度低的第一磁性层并且在第一磁性层上具有居里温度高的第二磁性层的单元记录介质被加热装置加热。 在制造两个具有在一个方向上被磁化的第二磁性层的这种单位记录介质之后，将所制造的两个单元记录介质彼此叠置并整体形成，以获得磁光记录介质，其中， 记录的信息和记录速度加倍。 另外，向磁光记录介质添加发光装置和磁场发生器，以获得具有低功耗水平的紧凑型磁光记录系统。

公开(公告)号：US5218591A

公开(公告)日：1993-06-08

申请号：US725277

申请日：1991-07-03

申请人： Masayoshi Shimamoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Osamu Ito

发明人： Masayoshi Shimamoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Osamu Ito

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

CPC分类号： G11B7/126 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10194 ,  G11B7/0045 ,  G11B7/00451 ,  G11B7/125 ,  G11B7/24085 ,  G11B11/10506

摘要： In an optical disk apparatus for recording information in pits formed on an optical disk by projecting a light beam onto the optical disk and heating an area of the optical disk corresponding to the pulse pattern of the information, the pulse pattern of the information to be recorded is discriminated, and on the basis of the discriminated pulse pattern, the timing to start on and end the emission of the light beam from the light source to the optical disk is modified, or the number of emissions and the duration of each emission is controlled so that the pattern of the pits are corrected to the shapes that ensure accurate regeneration of the information.

摘要翻译： 在光盘装置中，通过将光束投射到光盘上并且对与信息的脉冲图案对应的光盘的区域进行加热来记录在光盘上形成的凹坑中的信息，记录的信息的脉冲图案 并且基于所识别的脉冲图案，改变开始并结束从光源到光盘的光束发射的定时，或者控制发射的数量和每个发射的持续时间 使得凹坑的图案被校正为确保信息的准确再生的形状。

公开(公告)号：US5197048A

公开(公告)日：1993-03-23

申请号：US770602

申请日：1991-10-03

申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

IPC分类号： G11B13/04

CPC分类号： G11B13/04

摘要： A magneto-optic recording medium has a cartridge provided with a magnetization direction indicating portion for indicating the direction of magnetization of a second magnetic layer. Alternatively, the direction of magnetization of the second magnetic layer is recorded in advance in the first magnetic layer. The direction of magnetization of the second magnetic layer indicated or recorded is detected and recognized. A magnetic field oriented in an opposite direction to the direction of magnetization detected is imparted to the magneto-optic recording medium. Alternatively, predetermined information is recorded in the first magnetic layer, the direction of magnetization of the second magnetic layer is detected on the basis of a signal reproducing that information, and the direction of a magnetic field to be applied to the magneto-optic recording medium is set on the basis of the direction of magnetization thus detected. In addition, the direction of the magnetic field to be applied to the magneto-optic recording medium is set and the output of a light beam is changed on the basis of the direction of the second magnetic layer detected.

摘要翻译： 磁光记录介质具有带有用于指示第二磁性层的磁化方向的磁化方向指示部的盒。 或者，第二磁性层的磁化方向预先记录在第一磁性层中。 检测并识别表示或记录的第二磁性层的磁化方向。 向磁光记录介质赋予与所检测的磁化方向相反的方向取向的磁场。 或者，预定信息被记录在第一磁性层中，基于再现该信息的信号和施加到磁​​光记录介质的磁场的方向来检测第二磁性层的磁化方向 基于这样检测的磁化方向设定。 此外，设置施加到磁光记录介质的磁场的方向，并且基于检测到的第二磁性层的方向改变光束的输出。

公开(公告)号：US5457674A

公开(公告)日：1995-10-10

申请号：US755026

申请日：1991-09-04

申请人： Isao Watanabe ,  Koichi Yamada ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka

发明人： Isao Watanabe ,  Koichi Yamada ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka

IPC分类号： G11B20/12 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/125 ,  G11B11/105 ,  G11B19/02 ,  G11B19/28

CPC分类号： G11B7/126 ,  G11B11/10597 ,  G11B19/02 ,  G11B19/28 ,  G11B7/0037

摘要： An optical disc recording apparatus which records data with a second rotation frequency on an optical disc containing a preliminarily written recording condition in relation to a first rotation frequency. The optical disc recording apparatus preliminarily possesses recording condition in relation to the first and second rotation frequencies. The optical disc recording apparatus initially reads the recording condition in relation to the first rotation frequency, and then, in accordance with the read-out recording condition in relation to the first rotation frequency and the stored recording condition in relation to the first and second rotation frequencies, the recording apparatus computes the recording condition applicable to the optical disc in relation to the second rotation frequency. Finally, the optical disc recording apparatus records data on the optical disc by applying the computed recording condition. In consequence, even when the recording condition in relation to the second rotation frequency is not yet known, the apparatus can securely execute the data recording operation.

摘要翻译： 一种光盘记录装置，其在包含关于第一旋转频率的预先写入的记录条件的光盘上记录具有第二旋转频率的数据。 光盘记录装置预先具有关于第一和第二旋转频率的记录条件。 光盘记录装置最初读取关于第一旋转频率的记录条件，然后根据关于第一和第二旋转的第一旋转频率和存储的记录条件的读出记录条件 记录装置相对于第二旋转频率计算适用于光盘的记录条件。 最后，光盘记录装置通过应用计算出的记录条件将数据记录在光盘上。 因此，即使当关于第二旋转频率的记录条件尚不知道时，装置也可以安全地执行数据记录操作。

公开(公告)号：US5369628A

公开(公告)日：1994-11-29

申请号：US591610

申请日：1990-10-02

申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

IPC分类号： G11B23/40 ,  G11B11/10 ,  G11B11/105 ,  G11B23/03 ,  G11B13/04 ,  G11B11/12

CPC分类号： G11B11/10584 ,  G11B11/105 ,  G11B11/10506 ,  G11B11/1056 ,  G11B11/10595 ,  G11B23/03

摘要： A magneto-optic recording medium has a cartridge provided with a magnetization direction indicating portion for indicating the direction of magnetization of a second magnetic layer. Alternatively, the direction of magnetization of the second magnetic layer is recorded in advance in the first magnetic layer. The direction of magnetization of the second magnetic layer indicated or recorded is detected and recognized. A magnetic field oriented in an opposite direction to the direction of magnetization detected is imparted to the magneto-optic recording medium. Alternatively, predetermined information is recorded in the first magnetic layer, the direction of magnetization of the second magnetic layer is detected on the basis of a signal reproducing that information, and the direction of a magnetic field to be applied to the magneto-optic recording medium is set on the basis of the direction of magnetization thus detected. In addition, the direction of the magnetic field to be applied to the magneto-optic recording medium is set and the output of a light beam is changed on the basis of the direction of the second magnetic layer detected.

摘要翻译： 磁光记录介质具有带有用于指示第二磁性层的磁化方向的磁化方向指示部的盒。 或者，第二磁性层的磁化方向预先记录在第一磁性层中。 检测并识别表示或记录的第二磁性层的磁化方向。 向磁光记录介质赋予与所检测的磁化方向相反的方向取向的磁场。 或者，预定信息被记录在第一磁性层中，基于再现该信息的信号和施加到磁​​光记录介质的磁场的方向来检测第二磁性层的磁化方向 基于这样检测的磁化方向设定。 此外，设置施加到磁光记录介质的磁场的方向，并且基于检测到的第二磁性层的方向改变光束的输出。

公开(公告)号：US4835752A

公开(公告)日：1989-05-30

申请号：US132167

申请日：1987-12-14

申请人： Keiji Nakatsu ,  Shigeo Hayashi ,  Masaharu Ogawa ,  Osamu Itou ,  Isao Watanabe ,  Kunimaro Tanaka

发明人： Keiji Nakatsu ,  Shigeo Hayashi ,  Masaharu Ogawa ,  Osamu Itou ,  Isao Watanabe ,  Kunimaro Tanaka

IPC分类号： G11B7/085

CPC分类号： G11B7/08529 ,  G11B7/08517

摘要： A device for driving and controlling an optical head by forming a spot of a light beam on an optical disk having a plurality of tracks and detecting light from the spot reflected on the optical disk by a pair of optical detectors disposed in the head. This device has: a head actuator for moving a movable portion of the optical head in the radial direction of the disk; a speed detector for detecting the track-crossing speed of the spot from outputs from the optical detectors; a reference speed generator for generating, while accessing to a target track, a reference moving speed signal in accordance with the distance to the target track obtained from the outputs from the optical detectors, the movable head portion being moved on the basis of the reference moving speed signal so that the speed of the movable portion decreases at a position near the target track before the light beam spot reaches this track; a speed error detector for obtaining the difference between outputs from the reference speed generator and the speed detector; and a magnification change circuit adapted for amplifying the outputs from the reference speed generator and the speed detector by a predetermined multiplying factor when the distance between the light beam spot and the target track, or the crossing speed of the spot, becomes smaller than a predetermined value, the magnification change circuit also being adapted for outputting the difference obtained by the speed error detector after multiplying it by the reciprocal of the multiplying factor. The head actuator is driven on the basis of the output from the error detector so as to control the speed of the movable head portion.

摘要翻译： 一种用于通过在具有多个轨道的光盘上形成光束点并且通过设置在头部中的一对光学检测器从光盘上反射的光点检测光来驱动和控制光学头的装置。 该装置具有：头致动器，用于沿光盘的径向方向移动光头的可移动部分; 速度检测器，用于从光学检测器的输出检测光斑的跟踪交叉速度; 参考速度发生器，用于在根据从所述光学检测器的输出获得的与所述目标轨迹的距离的同时访问目标轨道时生成参考移动速度信号，所述可移动头部基于所述参考移动来移动 使得在光束点到达该轨道之前，可动部分的速度在靠近目标轨道的位置处减小; 用于获得来自基准速度发生器和速度检测器的输出之间的差的速度误差检测器; 以及放大率变化电路，其适用于当光束光点与目标光道之间的距离或点的交叉速度变得小于预定的倍数时，以基准速度发生器和速度检测器的输出放大预定的倍率 值，倍率变化电路也适于输出由速度误差检测器乘以乘法乘数后的差值。 基于来自误差检测器的输出来驱动头致动器，以便控制可动头部的速度。

公开(公告)号：US5309415A

公开(公告)日：1994-05-03

申请号：US734963

申请日：1991-07-24

申请人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Arai ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakai

发明人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Arai ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakai

IPC分类号： G11B7/09 ,  G11B11/105 ,  G11B13/04 ,  G11B11/10 ,  G11B11/12

CPC分类号： G11B11/10517 ,  G11B11/10586 ,  G11B7/0901

摘要： Methods and apparatuses are disclosed for improving accuracy of recording and reproducing information onto and from a magneto-optic recording information medium. In the first method, a width of a mark formed by a relatively low intensity light beam between two kinds of light beam intensities used for recording information is made larger than a sum of a track land width and the maximum track offset of the light beam, thereby the mark formed by the relatively low intensity light beam covers the track land portion in its full width. In the first apparatus, a reflected light beam from the magneto-optic recording information medium is split into a reflected beam for information reproducing and a reflected beam for tracking and focusing servos at the reproducing, thereby the apparatus can remove part being affected by the track groove portion from the reflected light beam for information reproducing. In the second method and apparatus, an intensity ratio of the two kinds of intensities of light beams used for information recording is controlled in such a manner that a mark width formed by the relative low intensity light beam is wider than a mark width formed by the relative high intensity light beam.

摘要翻译： 公开了用于提高在磁光记录信息介质上记录和再现信息的精度的方法和装置。 在第一种方法中，使用用于记录信息的两种光束强度之间由相对低强度的光束形成的标记的宽度大于光束的轨迹平面宽度和最大光轨偏移之和， 由此由相对低强度的光束形成的标记以其宽度覆盖轨迹陆部。 在第一装置中，来自磁光记录信息介质的反射光束被分成用于信息再现的反射光束和用于在再现时跟踪和聚焦伺服的反射光束，从而该装置可以去除受轨迹影响的部分 沟槽部分，用于信息再现。 在第二方法和装置中，用于信息记录的光束的两种强度的强度比被控制为使得由相对低强度光束形成的标记宽度比由 相对高强度光束。

公开(公告)号：US5272684A

公开(公告)日：1993-12-21

申请号：US558673

申请日：1990-07-26

申请人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Aria ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakaki

发明人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Aria ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakaki

IPC分类号： G11B7/09 ,  G11B11/105 ,  G11B11/00 ,  G11B3/70

CPC分类号： G11B11/10517 ,  G11B11/10586 ,  G11B7/0901

摘要： Methods and apparatuses are disclosed for improving accuracy of recording and reproducing information onto and from a magneto-optic recording information medium. In the first method, a width of a mark formed by a relatively low intensity light beam between two kinds of light beam intensities used for recording information is made larger than a sum of a track land width and the maximum track offset of the light beam, thereby the mark formed by the relatively low intensity light beam covers the track land portion in its full width. In the first apparatus, a reflected light beam from the magneto-optic recording information medium is split into a reflected beam for information reproducing and a reflected beam for tracking and focusing servos at the reproducing, thereby the apparatus can remove part being affected by the track groove portion from the reflected light beam for information reproducing. In the second method and apparatus, an intensity ratio of the two kinds of intensities of light beams used for information recording is controlled in such a manner that a mark width formed by the relative low intensity light beam is wider than a mark width formed by the relative high intensity light beam.

摘要翻译： 公开了用于提高在磁光记录信息介质上记录和再现信息的精度的方法和装置。 在第一种方法中，使用用于记录信息的两种光束强度之间由相对低强度的光束形成的标记的宽度大于光束的轨迹平面宽度和最大光轨偏移之和， 由此由相对低强度的光束形成的标记以其宽度覆盖轨迹陆部。 在第一装置中，来自磁光记录信息介质的反射光束被分割成用于信息再现的反射光束和用于在再现时跟踪和聚焦伺服的反射光束，从而该装置可以去除受轨迹影响的部分 沟槽部分，用于信息再现。 在第二方法和装置中，用于信息记录的光束的两种强度的强度比被控制为使得由相对低强度光束形成的标记宽度比由 相对高强度光束。