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1. 发明授权

US06904002B2 Magneto-optical reproducing method using a plurality of different reproducing beams 失效
标题翻译：使用多个不同再现光束的磁光再现方法
公开(公告)号：US06904002B2
公开(公告)日：2005-06-07
申请号：US10452043
申请日：2003-06-03
申请人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa
发明人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa
IPC分类号： G11B11/105 , G11B11/00 , G11B11/10
CPC分类号： G11B11/10515 , G11B11/10528 , G11B11/10584 , G11B11/10586 , G11B11/10595
摘要： A magneto-optical recording medium has magneto-optical recording layers (11, 12, 13) and reproducing layers (21, 22, 23). The information recorded in the reproducing layers are reproduced by means of reproducing light beams (31, 32, 33) of different wavelengths, respectively. In reproduction, magnetic domains (4) recorded in the recording layers are transferred in the reproducing layers formed on the respective recording layers, the transferred magnetic domains (5) are enlarged with an external magnetic field, and the information is reproduced. Since information is recorded and reproduced for each recording layer, the recording density is improved. Further since the reproduction signals are amplified by the magnetic domain enlargement, the C/N is improved.
摘要翻译：磁光记录介质具有磁光记录层（11,12,13）和再现层（21,22,23）。记录在再现层中的信息分别通过再现不同波长的光束（31,32,33）来再现。在再现中，记录在记录层中的磁畴（4）被传送到形成在各个记录层上的再现层中，所传送的磁畴（5）被外部磁场扩大，并且再现信息。由于为每个记录层记录和再现信息，因此提高了记录密度。此外，由于通过磁畴放大来放大再现信号，所以提高了C / N。

2. 发明授权

US06633514B1 Magneto-optical reproducing method using a plural of different reproducing beams 失效
标题翻译：使用多个不同再现光束的磁光再现方法
公开(公告)号：US06633514B1
公开(公告)日：2003-10-14
申请号：US09601196
申请日：2000-08-16
申请人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa
发明人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa
IPC分类号： G11B1100
CPC分类号： G11B11/10515 , G11B11/10528 , G11B11/10584 , G11B11/10586 , G11B11/10595
摘要： A magneto-optical recording medium has magneto-optical recording layers (11, 12, 13) and reproducing layers (21, 22, 23). The information recorded in the reproducing layers are reproduced by means of reproducing light beams (31, 32, 33) of different wavelengths, respectively. In reproduction, magnetic domains (4) recorded in the recording layers are transferred in the reproducing layers formed on the respective recording layers, the transferred magnetic domains (5) are enlarged with an external magnetic field, and the information is reproduced. Since information is recorded and reproduced for each recording layer, the recording density is improved. Further since the reproduction signals are amplified by the magnetic domain enlargement, the C/N is improved.
摘要翻译：磁光记录介质具有磁光记录层（ 11,12,13，）和再现层（ 21,22,23 ）。记录在再现层中的信息分别通过再现不同波长的光束（ 31,32,33 ）来再现。在再现中，记录在记录层中的磁畴（ 4 PDAT>）被传送到形成在各个记录层上的再现层中，转移的磁畴（ 5 ）用外部磁场放大，信息被再现。由于为每个记录层记录和再现信息，因此提高了记录密度。此外，由于再现信号被磁畴放大放大，因此C / N得到改善

3. 发明授权

US06388954B1 Magneto-optical recording medium having clock-marks on recording layer and apparatus for recording and reproducing same 失效
标题翻译：在记录层上具有时钟标记的磁光记录介质以及用于记录和再现记录层的装置
公开(公告)号：US06388954B1
公开(公告)日：2002-05-14
申请号：US09280811
申请日：1999-03-30
申请人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa , Manabu Tani , Masafumi Yoshihiro , Masaki Sekine
发明人： Hiroyuki Awano , Katsusuke Shimazaki , Hiroki Takao , Norio Ohta , Akiyoshi Itou , Katsuji Nakagawa , Manabu Tani , Masafumi Yoshihiro , Masaki Sekine
IPC分类号： G11B1100
CPC分类号： G11B7/1275 , G11B11/10515 , G11B11/10543
摘要： The magneto-optical recording medium has a magnetic domain magnification reproducing layer and an information recording layer. Clock marks are formed on the information recording layer, making it possible to generate a reproducing clock on the basis of these. The clock marks are detected either by irradiating directly with light of wavelength &lgr;2(&lgr;1≠&lgr;2), being different from the light of wavelength &lgr;1 which is used for reproducing the recording marks, or by applying a direct-current magnetic field, transferring and enlarging the clock marks on to the magnetic domain magnification reproducing layer, and detecting the reproduction signals from this magnetic domain magnification reproducing layer. Since the reproducing clock is in exact synchronisation with the recording marks, it is eminently suitable as a clock for pulse-modulated reproducing light and reproducing magnetic fields used when reproducing the reproducing layer.
摘要翻译：磁光记录介质具有磁畴倍率再现层和信息记录层。在信息记录层上形成时钟标记，从而可以基于这些生成再现时钟。通过直接照射波长为lambd2（lambd1> lambd2）的光，不同于用于再现记录标记的波长lambd1的光，或通过施加直流磁场，转印和将时钟标记放大到磁畴倍率再现层，并检测来自该磁畴倍率再现层的再现信号。由于再现时钟与记录标记完全同步，所以它非常适合用作脉冲调制再现光的时钟并且再现再生层时使用的再现磁场。

4. 发明授权

US06693854B2 Reproducing method and reproducing apparatus for magneto-optical recording medium 失效
标题翻译：磁光记录介质的再现方法和再现装置
公开(公告)号：US06693854B2
公开(公告)日：2004-02-17
申请号：US10388397
申请日：2003-03-17
申请人： Katsusuke Shimazaki , Susumu Imai , Norio Ohta , Hiroyuki Awano , Masafumi Yoshihiro , Hitoshi Watanabe , Hiroki Takao
发明人： Katsusuke Shimazaki , Susumu Imai , Norio Ohta , Hiroyuki Awano , Masafumi Yoshihiro , Hitoshi Watanabe , Hiroki Takao
IPC分类号： G11B1100
CPC分类号： G11B11/10595 , G11B11/10513 , G11B11/10515 , G11B11/10528 , G11B11/10584 , G11B11/10593 , G11B20/00086 , G11B20/1217 , G11B2020/1275 , G11B2020/1298 , G11B2220/2525
摘要： External magnetic fields H(x) or reproducing light beams L(x) having different intensity patterns are applied to an identical recording position on a magneto-optical recording medium so that different pieces of information corresponding to the patterns are reproduced from the identical recording position. A function H(x) or L(x) is a password for obtaining the information. Only a person, who knows the function, can access specified information recorded on the magneto-optical recording medium. The function H(x) or L(x) is a function in which the magnetic field intensity or the light intensity is modulated with respect to the recording position x so that magnetic domains may be thinned out to perform reproduction at a specified cycle from continuous magnetic domains in a recording area. Other than the use for the purpose of security, reproduced C/N can be remarkably improved by performing reproduction n times while radiating a reproducing light beam PL/PH which is power-modulated so that the high power PH is applied at every cycle which is not less than n times the recording clock, to a specified magneto-optical recording medium capable of magnetic domain-magnifying reproduction.
摘要翻译：具有不同强度图案的外部磁场H（x）或再现光束L（x）被施加到磁光记录介质上相同的记录位置，使得与图案对应的不同的信息从相同的记录位置再现。函数H（x）或L（x）是用于获取信息的密码。知道该功能的人只能访问记录在磁光记录介质上的指定信息。函数H（x）或L（x）是其中相对于记录位置x调制磁场强度或光强度的功能，使得磁畴可以被稀疏以在连续的指定周期进行再现记录区域的磁畴。除了用于安全性的用途之外，通过执行再现n次，可以显着提高再现的C / N，同时辐射被功率调制的再现光束PL / PH，使得在每个周期都应用高功率PH 不小于n倍的记录时钟，到能够进行磁畴放大再现的指定磁光记录介质。

5. 发明授权

US06556516B1 Reproducing method and reproducing apparatus for magneto-optical recording medium using different radiation patterns 失效
标题翻译：使用不同辐射图的磁光记录介质的再现方法和再现装置
公开(公告)号：US06556516B1
公开(公告)日：2003-04-29
申请号：US09242907
申请日：1999-03-22
申请人： Katsusuke Shimazaki , Susumu Imai , Norio Ohta , Hiroyuki Awano , Masafumi Yoshihiro , Hitoshi Watanabe , Hiroki Takao
发明人： Katsusuke Shimazaki , Susumu Imai , Norio Ohta , Hiroyuki Awano , Masafumi Yoshihiro , Hitoshi Watanabe , Hiroki Takao
IPC分类号： G11B1100
CPC分类号： G11B11/10595 , G11B11/10513 , G11B11/10515 , G11B11/10528 , G11B11/10584 , G11B11/10593 , G11B20/00086 , G11B20/1217 , G11B2020/1275 , G11B2020/1298 , G11B2220/2525
摘要： External magnetic fields H(x) or reproducing light beams L(x) having different intensity patterns are applied to an identical recording position on a magneto-optical recording medium so that different pieces of information corresponding to the patterns are reproduced from the identical recording position. A function H(x) or L(x) is a password for obtaining the information. Only a person, who knows the function, can access specified information recorded on the magneto-optical recording medium. The function H(x) or L(x) is a function in which the magnetic field intensity or the light intensity is modulated with respect to the recording position x so that magnetic domains may be thinned out to perform reproduction at a specified cycle from continuous magnetic domains in a recording area. Other than the use for the purpose of security, reproduced C/N can be remarkably improved by performing reproduction n times while radiating a reproducing light beam PL/PH which is power-modulated so that the high power PH is applied at every cycle which is not less than n times the recording clock, to a specified magneto-optical recording medium capable of magnetic domain-magnifying reproduction.
摘要翻译：具有不同强度图案的外部磁场H（x）或再现光束L（x）被施加到磁光记录介质上相同的记录位置，使得与图案对应的不同的信息从相同的记录位置再现。函数H（x）或L（x）是用于获取信息的密码。知道该功能的人只能访问记录在磁光记录介质上的指定信息。函数H（x）或L（x）是其中相对于记录位置x调制磁场强度或光强度的功能，使得磁畴可以被稀疏以在连续的指定周期进行再现记录区域的磁畴。除了用于安全性的用途之外，通过执行再现n次，可以显着提高再现的C / N，同时辐射被功率调制的再现光束PL / PH，使得在每个周期都应用高功率PH 不小于n倍的记录时钟，到能够进行磁畴放大再现的指定磁光记录介质。

6. 发明授权

US06628574B1 Reproducing method and reproducing apparatus using plural light beam powers for transferring a magnetic domain 失效
标题翻译：使用多个光束光焦度传送磁畴的再现方法和再现装置
公开(公告)号：US06628574B1
公开(公告)日：2003-09-30
申请号：US09600030
申请日：2000-07-11
申请人： Katsusuke Shimazaki , Hitoshi Watanabe , Hiroyuki Awano , Masahumi Yoshihiro , Norio Ohta
发明人： Katsusuke Shimazaki , Hitoshi Watanabe , Hiroyuki Awano , Masahumi Yoshihiro , Norio Ohta
IPC分类号： G11B1100
CPC分类号： B82Y10/00 , G11B7/1372 , G11B7/24082 , G11B11/10515 , G11B11/10543 , G11B11/10554 , G11B11/1058 , G11B11/10584 , G11B11/10593
摘要： A reproducing apparatus for a magneto-optical recording medium has, at one end of a swing arm, a magneto-optical head provided with a slider and a solid immersion lens. A reproducing light beam-detecting system is installed to the other end of the swing arm. During reproduction on a magneto-optical recording medium, an alternating magnetic field is applied while radiating a reproducing light beam which is power-modulated to have a low power and a high power in synchronization with a reproducing clock. The reproducing light beam having the low power causes transfer of a magnetic domain in the information-recording layer to the reproducing layer and magnification thereof. The reproducing light beam having the high power extinguishes the magnified magnetic domain. Minute magnetic domains can be individually reproduced at high C/N.
摘要翻译：用于磁光记录介质的再现装置在摆臂的一端具有设置有滑块和固体浸没透镜的磁光头。再现光束检测系统安装在摆臂的另一端。在磁光记录介质的再现期间，施加交变磁场，同时以与再现时钟同步的方式辐射被功率调制为具有低功率和高功率的再现光束。具有低功率的再现光束使得信息记录层中的磁畴传输到再现层及其放大倍率。具有高功率的再现光束消除了放大的磁畴。分钟磁畴可以高C / N单独再现。

7. 发明授权

US07110327B2 Magneto-optical recording and reproducing method, using reproducing layer with high saturation magnetization 失效
标题翻译：磁光记录和再现方法，使用具有高饱和磁化强度的再现层
公开(公告)号：US07110327B2
公开(公告)日：2006-09-19
申请号：US10200289
申请日：2002-07-23
申请人： Hiroki Takao , Yuji Yamazaki , Susumu Imai , Hiroyuki Awano , Katsusuke Shimazaki
发明人： Hiroki Takao , Yuji Yamazaki , Susumu Imai , Hiroyuki Awano , Katsusuke Shimazaki
IPC分类号： G11B11/00 , G11B5/66
CPC分类号： B82Y10/00 , G11B5/012 , G11B5/10 , G11B5/127 , G11B5/1278 , G11B5/40 , G11B5/488 , G11B5/66 , G11B5/74 , G11B5/82 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021 , Y10S428/90 , Y10T428/12611
摘要： A magnetic recording medium comprises, on a substrate, a recording auxiliary layer, a recording holding layer, recording control layer, and a recording layer. The recording layer is constructed by using a ferri-magnetic material having perpendicular magnetization. The data can be recorded at a super high density by using the recording and reproducing head of the present invention, because the recording layer has the perpendicular magnetization. The disappearance of data, which would be otherwise caused by the thermomagnetic relaxation phenomenon, is suppressed after recording the data, because the recording layer has large coercive force at the room temperature. The data, which is recorded at the super high density on the magnetic recording medium, can be reproduced by using a magnetic resistance element carried on the recording and reproducing head.
摘要翻译：磁记录介质在基板上包括记录辅助层，记录保持层，记录控制层和记录层。记录层通过使用具有垂直磁化强度的铁磁材料构成。由于记录层具有垂直磁化强度，所以通过使用本发明的记录和再现头可以以超高密度记录数据。由于记录层在室温下具有较大的矫顽力，所以在记录数据之后，由于热磁性松弛现象而导致的数据的消失被抑制。可以通过使用在记录和再现头上携带的磁阻元件来再现在磁记录介质上以超高密度记录的数据。

8. 发明授权

US07113453B1 Method for recording and reproduction on a magneto-optical recording medium 失效
标题翻译：在磁光记录介质上进行记录和再现的方法
公开(公告)号：US07113453B1
公开(公告)日：2006-09-26
申请号：US09321795
申请日：1999-05-28
申请人： Katsusuke Shimazaki , Norio Ohta , Akiyoshi Ito , Katsuji Nakagawa , Kazuko Inoue
发明人： Katsusuke Shimazaki , Norio Ohta , Akiyoshi Ito , Katsuji Nakagawa , Kazuko Inoue
IPC分类号： G11B11/00 , G11B7/24
CPC分类号： G11B11/10508 , G11B11/10515 , G11B11/10586
摘要： A magneto-optical recording medium and a method for recording and reproduction thereon are provided in order to reproduce information recorded by multi-valued recording at a high S/N ratio. Disclosed is a magneto-optical recording medium including two magnetic layers capable of four-valued recording based on four combined magnetization states. Magnitudes of reproduction signals concerning the four magnetization states, obtained upon reproduction at a wavelength λ1, are different from those obtained upon reproduction at a wavelength λ2. The two magnetic layers, on which a signal (a) is recorded, are irradiated with light beams having the wavelengths λ1 and λ2 respectively. Signals (d), (e) reproduced from respective reflected light beams are sliced by using at least one slice level to obtain two-valued or higher multi-valued reproduction signals respectively. The two-valued or higher multi-valued reproduction signals (f), (g) from the respective wavelengths are mutually subjected to logical operation to reproduce recorded information (i).
摘要翻译：提供磁光记录介质及其上的记录和再现方法，以便以高S / N比再现通过多值记录记录的信息。公开了一种包括基于四个组合磁化状态能够进行四值记录的两个磁性层的磁光记录介质。在波长λ1 1再现时获得的关于四个磁化状态的再现信号的幅度与在波长λ2 2再现时获得的重现信号的大小不同。在其上记录有信号（a）的两个磁性层分别用波长λ1和λ2的光束照射。通过使用至少一个限幅电平对从各反射光束再现的信号（d），（e）进行分片，以分别获得二值或更高的多值再现信号。来自各个波长的两值或更高的多值再生信号（f），（g））相互进行逻辑运算以再现记录信息（i）。

9. 发明授权

US5923625A Magneto-optical recording medium and method for recording and reproduction thereon 失效
标题翻译：磁光记录介质及其上的记录和再现方法
公开(公告)号：US5923625A
公开(公告)日：1999-07-13
申请号：US981308
申请日：1997-12-16
申请人： Katsusuke Shimazaki , Norio Ohta , Akiyoshi Ito , Katsuji Nakagawa , Kazuko Inoue
发明人： Katsusuke Shimazaki , Norio Ohta , Akiyoshi Ito , Katsuji Nakagawa , Kazuko Inoue
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10508 , G11B11/10515 , G11B11/10586
摘要： A magneto-optical recording medium and a method for recording and reproduction thereon are provided in order to reproduce information recorded by multi-valued recording at a high S/N ratio. Disclosed is a magneto-optical recording medium including two magnetic layers capable of four-valued recording based on four combined magnetization states. Magnitudes of reproduction signals concerning the four magnetization states, obtained upon reproduction at a wavelength .lambda..sub.1, are different from those obtained upon reproduction at a wavelength .lambda..sub.2. The two magnetic layers, on which a signal (a) is recorded, are irradiated with light beams having the wavelengths .lambda..sub.1 and .lambda..sub.2 respectively. Signals (d), (e) reproduced from respective reflected light beams are sliced by using at least one slice level to obtain two-valued or higher multi-valued reproduction signals respectively. The two-valued or higher multi-valued reproduction signals (f), (g) from the respective wavelengths are mutually subjected to logical operation to reproduce recorded information (i).
摘要翻译： PCT No.PCT / JP96 / 01938 Sec。 371日期：1997年12月16日 102（e）日期1997年12月16日PCT提交1996年7月12日PCT公布。公开号WO97 / 03439 日期1997年1月30日提供磁光记录介质及其上的记录和再现方法，以便以高S / N比再现由多值记录记录的信息。公开了一种包括基于四个组合磁化状态能够进行四值记录的两个磁性层的磁光记录介质。关于在波长λ1再现时获得的四种磁化状态的再现信号的幅度与在波长λ2再现时获得的不同。将记录有信号（a）的两个磁性层照射分别具有波长λ1和λ2的光束。通过使用至少一个限幅电平对从各反射光束再现的信号（d），（e）进行分片，以分别获得二值或更高的多值再现信号。来自各个波长的两值或更高的多值再生信号（f），（g））相互进行逻辑运算以再现记录信息（i）。

10. 发明授权

US06424601B1 Magneto-optical recording media having an auxiliary magnetic layer 失效
标题翻译：具有辅助磁性层的磁光记录介质
公开(公告)号：US06424601B1
公开(公告)日：2002-07-23
申请号：US09142747
申请日：1998-11-16
申请人： Satoru Oonuki , Masafumi Yoshihiro , Nobuyuki Nagai , Katsusuke Shimazaki , Hiroyuki Awano , Hiroshi Shirai , Norio Ohta , Satoshi Sumi , Atsushi Yamaguchi
发明人： Satoru Oonuki , Masafumi Yoshihiro , Nobuyuki Nagai , Katsusuke Shimazaki , Hiroyuki Awano , Hiroshi Shirai , Norio Ohta , Satoshi Sumi , Atsushi Yamaguchi
IPC分类号： G11B1100
CPC分类号： G11B11/10515 , G11B7/00745 , G11B11/10508 , G11B11/10521 , G11B11/10528 , G11B11/10578 , G11B11/10584 , G11B11/10593 , G11B11/10595 , G11B27/19 , G11B27/3027
摘要： A magneto-optical recording medium 11 has, in order from the laser irradiation side, a second auxiliary magnetic film 4, first auxiliary magnetic film 5, and magneto-optical recording film 6. First and second auxiliary magnetic films 4 and 5 change from in-plane magnetization to perpendicular magnetization when their respective critical temperatures TCR1 and TCR2 are exceeded. The Curie temperatures TC0, TC1 and TC2 of the magneto-optical recording film and the first and the second auxiliary magnetic films 4, 5 and their critical temperatures TCR1 and TCR2 satisfy the relationship: room temperature
摘要翻译：磁光记录介质11从激光照射侧起依次具有第二辅助磁性膜4，第一辅助磁性膜5和磁光记录膜6.第一和第二辅助磁性膜4和5从当它们各自的临界温度TCR1和TCR2被超过时，平面磁化对垂直磁化。磁光记录膜和第一和第二辅助磁膜4,5的居里温度TC0，TC1和TC2及其临界温度TCR1和TCR2满足关系：室温

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