公开(公告)号：US06847590B2

公开(公告)日：2005-01-25

申请号：US09931080

申请日：2001-08-17

申请人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Yoshiharu Uchihara ,  Satoshi Sumi ,  Hiroyuki Awano ,  Hiroshi Shirai ,  Hitoshi Watanabe ,  Norio Ohta

发明人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Yoshiharu Uchihara ,  Satoshi Sumi ,  Hiroyuki Awano ,  Hiroshi Shirai ,  Hitoshi Watanabe ,  Norio Ohta

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10595 ,  G11B7/00736 ,  G11B7/24085 ,  G11B11/10515 ,  G11B11/10584

摘要： A magneto-optical recording medium which includes a reproducing layer. When a laser beam is irradiated to the magneto-optical recording medium, a magnetic domain in a recording layer is transferred, through enlargement, to a reproducing layer increased in temperature. The magneto-optical recording medium further includes a calibration area that has a calibration magnetic domain recorded in a predetermined pattern in the recording layer. In a reproducing apparatus, a laser beam of an optical head is adjusted in output depending upon a reproduced signal obtained by reproducing the calibration magnetic domain.

摘要翻译： 一种磁光记录介质，包括再现层。 当激光束照射到磁光记录介质时，记录层中的磁畴通过放大转移到温度升高的再生层。 磁光记录介质还包括具有以记录层中的预定图案记录的校准磁畴的校准区域。 在再现装置中，根据通过再现校准磁畴获得的再现信号，调节光学头的激光束的输出。

公开(公告)号：US06301199B1

公开(公告)日：2001-10-09

申请号：US09108317

申请日：1998-07-01

申请人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Yoshiharu Uchihara ,  Satoshi Sumi ,  Hiroyuki Awano ,  Hiroshi Shirai ,  Hitoshi Watanabe ,  Norio Ohta

发明人： Atsushi Yamaguchi ,  Naoyuki Takagi ,  Yoshiharu Uchihara ,  Satoshi Sumi ,  Hiroyuki Awano ,  Hiroshi Shirai ,  Hitoshi Watanabe ,  Norio Ohta

IPC分类号： G11B1100

CPC分类号： G11B11/10584 ,  G11B7/00736 ,  G11B7/24085 ,  G11B11/10515 ,  G11B11/10595

摘要： A magneto-optical recording medium which includes a reproducing layer. When a laser beam is irradiated to the magneto-optical recording medium, a magnetic domain in a recording layer is transferred, through enlargement, to a reproducing layer increased in temperature. The magneto-optical recording medium further includes a calibration area that has a calibration magnetic domain recorded in a predetermined pattern in the recording layer. In a reproducing apparatus, a laser beam of an optical head is adjusted in output depending upon a reproduced signal obtained by reproducing the calibration magnetic domain.

摘要翻译： 一种磁光记录介质，包括再现层。 当激光束照射到磁光记录介质时，记录层中的磁畴通过放大转移到温度升高的再生层。 磁光记录介质还包括具有以记录层中的预定图案记录的校准磁畴的校准区域。 在再现装置中，根据通过再现校准磁畴获得的再现信号，调节光学头的激光束的输出。

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

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。

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。

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。

公开(公告)号：US06893746B1

公开(公告)日：2005-05-17

申请号：US10111608

申请日：2000-10-30

申请人： Fumiyoshi Kirino ,  Norio Ohta ,  Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Harumi Hieida ,  Masaki Sekine ,  Hiroyuki Awano ,  Akira Yano ,  Satoshi Matsunuma ,  Nobuyuki Inaba ,  Tetsunori Koda

发明人： Fumiyoshi Kirino ,  Norio Ohta ,  Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Harumi Hieida ,  Masaki Sekine ,  Hiroyuki Awano ,  Akira Yano ,  Satoshi Matsunuma ,  Nobuyuki Inaba ,  Tetsunori Koda

IPC分类号： G11B5/00 ,  G11B5/64 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B5/70 ,  G11B11/105

CPC分类号： G11B5/65 ,  G11B5/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/74 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagnetic film is composed of a magnetic material which has saturation magnetization larger than that of the information-recording film. Accordingly, the leak magnetic flux from the ferromagnetic film is larger than that from the information-recording film. The magnetic recording medium and a magnetic recording apparatus are obtained, which are excellent in thermal stability and which are preferred to perform super high density recording.

摘要翻译： 磁记录介质包括在基板上的信息记录膜和铁磁膜。 信息记录膜由例如具有垂直磁化的非晶铁磁材料构成。 此外，铁磁膜由具有比信息记录膜的饱和磁化强度大的饱和磁化强度的磁性材料构成。 因此，来自铁磁膜的泄漏磁通量大于来自信息记录膜的漏磁通量。 获得磁性记录介质和磁记录装置，其热稳定性优异，并且优选进行超高密度记录。

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。

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

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。