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1. 发明授权

US5309415A Information recording method for overwriting a magneto-optic recording medium with two intensities of light beams 失效
标题翻译：用于重写具有两束光束的磁光记录介质的信息记录方法
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。

2. 发明授权

US5272684A Information recording method and information recording apparatus for magneto-optic recording information medium 失效
标题翻译：用于磁光记录信息介质的信息记录方法和信息记录装置
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。

3. 发明授权

US5369628A Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method 失效
标题翻译：磁光记录介质，磁光记录系统和磁光记录方法
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。

4. 发明授权

US5197048A Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method 失效
标题翻译：磁光记录介质，磁光记录系统和磁光记录方法
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。

5. 发明授权

US5172364A Magneto-optic recording apparatus with controlled magnetic field generation 失效
标题翻译：具有受控磁场产生的磁光记录装置
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。

6. 发明授权

US5107483A Frequency selective optical data record/regenerate apparatus 失效
标题翻译：频率选择光学数据记录/再生装置
公开(公告)号：US5107483A
公开(公告)日：1992-04-21
申请号：US231881
申请日：1988-08-12
申请人： Yoshiki Nakajima , Kunimaro Tanaka , Kyosuke Yoshimoto , Motomu Yoshimura , Mitsuo Maeda , Koichi Takeuchi , Kouichi Yamada , Masaharu Ogawa , Kazuhiko Nakane , Hajime Nakajima , Masayoshi Shimamoto , Fumio Matsuda , Minoru Ozaki
发明人： Yoshiki Nakajima , Kunimaro Tanaka , Kyosuke Yoshimoto , Motomu Yoshimura , Mitsuo Maeda , Koichi Takeuchi , Kouichi Yamada , Masaharu Ogawa , Kazuhiko Nakane , Hajime Nakajima , Masayoshi Shimamoto , Fumio Matsuda , Minoru Ozaki
IPC分类号： G11B7/0045 , G11B7/125 , G11B7/24
CPC分类号： G11B7/126 , G11B7/00453 , G11B7/24
摘要： An apparatus in accordance with the present invention sequentially fixes the wavelength of a light beam irradiated from a light source whose oscillation wavelength sequentially varies to a plurality of different wavelengths to a recording medium to required wavelengths each capable of forming a hole at absorption spectrum of the recording medium, synchronizes timing of change of the wavelength of the light source with timing of recording or regenerating each bit of information, records the optical hole formed in a manner that each bit of information corresponds to the wavelength varying in sequence, and detects the formed hole to regenerate information. Furthermore, the holes formed by the same wavelength are recorded at the positions separated by a distance capable of avoiding interference, while the holes formed by different wavelengths in correspondence to each bit of information are recorded at nearly the same position while that position is slightly displaced at a time, and thereby information is multiple-recorded with high density.
摘要翻译：根据本发明的装置将从振荡波长依次变化的光源照射到多个不同波长的光束的波长的顺序地固定到记录介质上，每个波长能够在吸收光谱上形成孔记录介质，使光源的波长的变化的定时与记录或再生每个信息位的定时同步，以使每个位的信息顺序对应于波长变化的方式记录形成的光孔，并检测形成的孔重新生成信息。此外，由相同波长形成的孔被记录在以避免干扰的距离分开的位置处，而与每个信息位对应的不同波长形成的孔被记录在几乎相同的位置，同时该位置稍微位移同时，信息以高密度多重记录。

7. 发明授权

US5528565A Magneto-optic recording system 失效
标题翻译：磁光记录系统
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。

8. 发明授权

US5481508A Magneto-optic recording medium method of manufacturing the same and magneto-optic recording system 失效
标题翻译：磁光记录介质制造方法及磁光记录系统
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。

9. 发明授权

US5070492A Signal decoding apparatus and method 失效
标题翻译：信号解码装置及方法
公开(公告)号：US5070492A
公开(公告)日：1991-12-03
申请号：US317197
申请日：1989-02-28
申请人： Masaharu Ogawa , Yoshiki Nakajima , Osamu Ito , Teruo Furukawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Masafumi Ototake , Minoru Ozaki
发明人： Masaharu Ogawa , Yoshiki Nakajima , Osamu Ito , Teruo Furukawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Masafumi Ototake , Minoru Ozaki
IPC分类号： G11B7/005 , G11B7/007 , G11B7/085 , G11B11/105 , G11B20/10 , G11B20/12 , G11B20/14 , G11B27/30
CPC分类号： G11B20/10222 , G11B11/10565 , G11B20/10009 , G11B20/1217 , G11B20/1403 , G11B27/3027 , G11B7/005 , G11B7/00745 , G11B7/08505 , G11B7/08541 , G11B2220/20
摘要： The present invention relates to apparatus and method for decoding a signal reproduced from an optical disc. The optical disc has a signal format for recording data from an original signal in a data area at the optical disc. The optical disc also has recorded thereon a clock signal having the same phase as the recorded data. During reproduction of the recorded signal from the optical disc, this clock signal is utilized to generate a delayed version of the reproduced data signal. This delayed signal is used to decode the reproduced data signal obtained from the optical disc, thereby enabling a phase shift of the reproduced clock signal to there produced data signal to be eliminated by circuit processing. During the recording on the data area of the optical disc, fixing data for setting phases of data reproducing recording clock and reproducing signal to optimum phases for decoding is recorded. A phase corrector is provided at the optical disc driving apparatus so as to delay the fixing data signal reproduced from the optical disc, whereby a phase shift between the reproduced data signal and the reproduced clock signal can be corrected to an optimum quantity and the data signal at a preformatted area of the optical disc can be reproduced without delay.
摘要翻译：本发明涉及对从光盘再现的信号进行解码的装置和方法。光盘具有用于在光盘的数据区中记录来自原始信号的数据的信号格式。光盘上也记录了与记录数据相同相位的时钟信号。在从光盘再现记录的信号期间，该时钟信号用于产生再现数据信号的延迟版本。该延迟信号用于对从光盘获得的再现数据信号进行解码，从而能够通过电路处理来消除再现的时钟信号到那里产生的数据信号。在光盘的数据区域的记录期间，记录用于将数据再现记录时钟和再现信号的相位设置到用于解码的最佳相位的固定数据。在光盘驱动装置上设置相位校正器，以延迟从光盘再现的固定数据信号，从而可以将再现的数据信号和再生的时钟信号之间的相移校正到最佳量，并且数据信号可以无延迟地再现光盘的预格式化区域。

10. 发明授权

US5117412A Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc 失效
标题翻译：带伺服模式的光盘提供伺服时钟检测的增强可靠性和用于访问光盘的设备
公开(公告)号：US5117412A
公开(公告)日：1992-05-26
申请号：US526285
申请日：1990-05-21
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
IPC分类号： G11B7/007 , G11B7/013 , G11B7/085 , G11B19/04 , G11B19/20 , G11B27/30
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks. Each information track having a data field including multiple data bytes and a servo field including a first servo byte having a pair of wobbled pits and a second servo byte having a clock pit. The byte length of at least one of the first or second servo bytes being longer than the byte lengths of the data bytes. The increased byte length providing for greater distance between the wobbled pits and the clock pit resulting in increased reliability in clock pit detection. An accessing apparatus for accessing such an optical disc including a phase-locked loop circuit with a frequency dividing ratio that varies in accordance with the various byte lengths.

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