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：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。

公开(公告)号：US5172364A

公开(公告)日：1992-12-15

申请号：US558584

申请日：1990-07-26

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： G11B11/105

CPC分类号： G11B11/10521 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10534 ,  G11B11/10536 ,  G11B11/10586 ,  G11B11/10595

摘要： A magneto-optic recording apparatus which has a magnetic field generator that applies a magnetic field with a constant direction to a magneto-optic recording information medium for overwriting information to improve accuracy of recording and reproducing information onto and from magneto-optic recording information medium and further has an auxiliary magnetic field generator that compensates a variation of intensity of a magnetic field generated by the magnetic field generator and applied to the magneto-optic recording information medium is disclosed as the first invention. Also, a magneto-optic recording apparatus which performs synchronous wave detection of the reflected light signals from the magneto-optic recording information medium and controls A.C. voltages applied to an exciting coil of the magnetic field generator in response to the detected result of the synchronous wave detection, thus optimizing amplitudes of the reproducing signals from the magneto-optic recording information medium is disclosed as the second invention.

摘要翻译： 一种磁光记录装置，具有磁场发生器，该磁场发生器将具有恒定方向的磁场施加到磁光记录信息介质，用于重写信息，以提高在磁光记录信息介质上记录和再现信息的准确度;以及 作为第一发明，还公开了补偿由磁场发生器产生的磁场的强度变化并应用于磁光记录信息介质的辅助磁场发生器。 另外，磁光记录装置，对来自磁光记录信息介质的反射光信号进行同步波检测，并响应于同步波的检测结果控制施加到磁场发生器的励磁线圈的AC电压 作为第二发明，公开了检测，从而优化来自磁光记录信息介质的再现信号的振幅。

公开(公告)号：US4380015A

公开(公告)日：1983-04-12

申请号：US240063

申请日：1981-03-03

申请人： Osamu Ito ,  Isao Watanabe

发明人： Osamu Ito ,  Isao Watanabe

IPC分类号： H04N1/23 ,  G06K15/12 ,  G11B7/00 ,  G11B7/003 ,  G11B7/0045 ,  G11B9/00 ,  G11B23/00 ,  G11B27/36 ,  G01D15/14

CPC分类号： G11B9/00 ,  G06K15/12 ,  G11B23/0007 ,  G11B27/36 ,  G11B7/0045

摘要： A recording light beam from an argon laser is modulated with an electrical recording signal and then recorded on a rotating disc-shaped record medium. Immediately after this recording, a recorded signal on the record medium is reproduced with a light beam from a helium-argon laser and converted into an electrical signal. Duty cycles of both signals are sensed by respective duty cycle sensors. A differential amplifier produces a differential signal between the sensed duty cycles and supplies it to an optical modulator arranged to control the output of the recording laser. The modulator controls the recording light beam to its optimum light level for recording in response to the differential signal which was detected just before its modulation.

摘要翻译： 来自氩激光器的记录光束用电记录信号进行调制，然后记录在旋转的盘形记录介质上。 在该记录之后，立即用来自氦氩激光的光束再现记录介质上的记录信号，并将其转换为电信号。 两个信号的占空比由相应的占空比传感器感测。 差分放大器在所感测的占空比之间产生差分信号，并将其提供给布置成控制记录激光器的输出的光调制器。 调制器响应于在其调制之前检测到的差分信号，将记录光束控制到其最佳光电平进行记录。

公开(公告)号：US4334299A

公开(公告)日：1982-06-08

申请号：US87302

申请日：1979-10-22

申请人： Satoshi Komurasaki ,  Isao Watanabe ,  Osamu Ito

发明人： Satoshi Komurasaki ,  Isao Watanabe ,  Osamu Ito

IPC分类号： G02B7/28 ,  G11B7/085 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/08547 ,  G11B7/12

摘要： A recording optical system forms a recording spot to record a pitted signal on a record surface. A first reproducing optical system forms a reproducing spot fixed with respect to the recording spot on the record surface for monitoring purposes, and a second reproducing optical system with the greater part of the optical components thereof common to the first reproducing optical system and also including a rotatable reflecting mirror for forming a tracking spot on the record surface. The tracking spot is movable on the recorded signal by the rotation of the mirror in response to the light reflected from the record surface for causing the tracking spot to accurately track the pitted signal on the record surface.

摘要翻译： 记录光学系统形成记录点，以在记录表面上记录凹坑信号。 第一再现光学系统形成相对于记录表面上的记录点固定的再现点，用于监视目的，以及第二再现光学系统，其中大部分光学部件对于第一再现光学系统是共同的，并且还包括一个 可旋转反射镜，用于在记录表面上形成跟踪点。 响应于从记录表面反射的光，跟踪点可以通过反射镜的旋转在记录信号上移动，以使跟踪点精确地跟踪记录表面上的凹坑信号。

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。