公开(公告)号：US06501729B2

公开(公告)日：2002-12-31

申请号：US10000400

申请日：2001-12-04

申请人： Hitoshi Watanabe ,  Yoshitane Tsuburaya ,  Katsusuke Shimazaki ,  Satoru Ohnuki ,  Norio Ohta

发明人： Hitoshi Watanabe ,  Yoshitane Tsuburaya ,  Katsusuke Shimazaki ,  Satoru Ohnuki ,  Norio Ohta

IPC分类号： G11B370

CPC分类号： G11B23/0306 ,  G11B23/0308

摘要： A plate spring is provided on a back surface of a shutter of a cartridge. When the shutter is closed, the plate spring presses a disk in a cartridge case against an inner wall surface of a lower case so that the disk is immovable in the case. When the shutter is open, the plate spring is retracted into a space between an inner surface of the shutter and a surface of an upper case. The disk is supported immovably and uniformly in the cartridge. Therefore, deformation such as warpage of the disk hardly occurs. Even when the cartridge is stored in any posture, it is possible to avoid deformation such as warpage and flexure of the disk in the cartridge during the storage.

摘要翻译： 板弹簧设置在盒的挡板的后表面上。 当快门关闭时，板簧将盒壳体中的盘压靠在下壳体的内壁表面上，使得盘不可移动到壳体中。 当快门打开时，板簧缩回到快门的内表面和上壳体的表面之间的空间中。 磁盘不可移动地均匀地支撑在磁带盒中。 因此，几乎不发生诸如盘的翘曲等变形。 即使当以任何姿势存储盒时，也可以避免储存期间盒中的盘的翘曲和弯曲等变形。

公开(公告)号：US06339583B1

公开(公告)日：2002-01-15

申请号：US09100111

申请日：1998-06-19

申请人： Hitoshi Watanabe ,  Yoshitane Tsuburaya ,  Katsusuke Shimazaki ,  Satoru Ohnuki ,  Norio Ohta

发明人： Hitoshi Watanabe ,  Yoshitane Tsuburaya ,  Katsusuke Shimazaki ,  Satoru Ohnuki ,  Norio Ohta

IPC分类号： G11B370

CPC分类号： G11B23/0306 ,  G11B23/0308

摘要： A plate spring is provided on a back surface of a shutter of a cartridge. When the shutter is closed, the plate spring presses a disk in a cartridge case against an inner wall surface of a lower case so that the disk is immovable in the case. When the shutter is open, the plate spring is retracted into a space between an inner surface of the shutter and a surface of an upper case. The disk is supported immovably and uniformly in the cartridge. Therefore, deformation such as warpage of the disk hardly occurs. Even when the cartridge is stored in any posture, it is possible to avoid deformation such as warpage and flexure of the disk in the cartridge during the storage.

摘要翻译： 板弹簧设置在盒的挡板的后表面上。 当快门关闭时，板簧将盒壳体中的盘压靠在下壳体的内壁表面上，使得盘不可移动到壳体中。 当快门打开时，板簧缩回到快门的内表面和上壳体的表面之间的空间中。 磁盘不可移动地均匀地支撑在磁带盒中。 因此，几乎不发生诸如盘的翘曲等变形。 即使当以任何姿势存储盒时，也可以避免储存期间盒中的盘的翘曲和弯曲等变形。

公开(公告)号：US6122228A

公开(公告)日：2000-09-19

申请号：US141305

申请日：1998-08-27

申请人： Katsusuke Shimazaki ,  Yoshitane Tsuburaya ,  Norio Ohta ,  Hitoshi Watanabe ,  Hiroki Takao

发明人： Katsusuke Shimazaki ,  Yoshitane Tsuburaya ,  Norio Ohta ,  Hitoshi Watanabe ,  Hiroki Takao

IPC分类号： G11B11/105 ,  G11B13/04 ,  G11B11/00

CPC分类号： G11B11/10515 ,  G11B11/10593 ,  G11B11/10595

摘要： A magneto-optical recording medium comprises, on a substrate, a dielectric layer, a GdFeCo reproducing layer, a non-magnetic layer, and a TbFeCo recording layer. Upon reproduction, a DC magnetic field Hex is applied in the recording direction, and a reproducing light beam is radiated while being modulated to have a low power and a high power in synchronization with a reproducing clock. The reproducing layer is a magnetic film which changes from in-plane magnetization into perpendicular magnetization at a critical temperature Tcr, which has a compensation temperature Tcomp between room temperature and a Curie temperature Tc, and which satisfies Troom

摘要翻译： 磁光记录介质在基板上包括电介质层，GdFeCo再现层，非磁性层和TbFeCo记录层。 在再现时，在记录方向上施加DC磁场Hex，并且在再现时钟同步的同时，将被再调制的再现光束照射成具有低功率和高功率。 再现层是在室温和居里温度Tc之间具有补偿温度Tcomp的临界温度Tcr从平面内磁化转变为垂直磁化的磁性膜，其满足Troom

公开(公告)号：US06671233B1

公开(公告)日：2003-12-30

申请号：US09625278

申请日：2000-07-25

申请人： Katsusuke Shimazaki ,  Yoshitane Tsuburaya ,  Norio Ohta ,  Hitoshi Watanabe ,  Hiroki Takao

发明人： Katsusuke Shimazaki ,  Yoshitane Tsuburaya ,  Norio Ohta ,  Hitoshi Watanabe ,  Hiroki Takao

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10593 ,  G11B11/10595

摘要： A magneto-optical recording medium comprises, on a substrate, a dielectric layer, a GdFeCo reproducing layer, a non-magnetic layer, and a TbFeCo recording layer. Upon reproduction, a DC magnetic field Hex is applied in the recording direction, and a reproducing light beam is radiated while being modulated to have a low power and a high power in synchronization with a reproducing clock. The reproducing layer is a magnetic film which changes from in-plane magnetization into perpendicular magnetization at a critical temperature Tcr, which has a compensation temperature Tcomp between room temperature and a Curie temperature Tc, and which satisfies Troom

摘要翻译： 磁光记录介质在基板上包括电介质层，GdFeCo再现层，非磁性层和TbFeCo记录层。 在再现时，在记录方向上施加DC磁场Hex，并且在再现时钟同步的同时，将被再调制的再现光束照射成具有低功率和高功率。 再现层是在室温和居里温度Tc之间具有补偿温度Tcomp的临界温度Tcr从平面内磁化转变为垂直磁化的磁性膜，其满足Troom

公开(公告)号：US06385140B2

公开(公告)日：2002-05-07

申请号：US09799602

申请日：2001-03-07

申请人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

发明人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593

摘要： A magneto-optic recording medium includes a second auxiliary magnetic film, a first auxiliary magnetic film and a magneto-optic recording film on a substrate. The auxiliary magnetic films change from in-plane magnetization to vertical magnetization at critical temperatures TCR1 and TCR2. Since they have the relation TCR1>TCR2, the magnetic domain transferred from the magneto-optic recording film to the first auxiliary magnetic film at the time of reproduction is expanded in diameter and is transferred to the second auxiliary magnetic film when the temperature profiles of the auxiliary magnetic films inside an optical spot are utilized. The magnetic domain of the magneto-optic recording film can be expanded and transferred, too, by means of magnetostatic coupling by using a non-magnetic film in place of the first auxiliary magnetic film. Pulse reproduction light subjected to power modulation in synchronism with a reproduction clock can be used at the time of reproduction. Even when a very small magnetic domain is recorded, the intensity of an amplified reproduction signal can be detected and excellent C/N can be obtained.

摘要翻译： 磁光记录介质包括在基板上的第二辅助磁膜，第一辅助磁膜和磁光记录膜。 在临界温度TCR1和TCR2下，辅助磁膜从面内磁化转变为垂直磁化。 由于它们具有关系TCR1> TCR2，所以在再现时从磁光记录膜转移到第一辅助磁性膜的磁畴的直径扩大并且当第二辅助磁性膜的温度分布 利用光点内的辅助磁膜。 磁光记录膜的磁畴也可以通过使用非磁性膜代替第一辅助磁性膜的静磁耦合来扩展和转移。 在再现时可以使用经受与再现时钟同步的功率调制的脉冲再现光。 即使记录非常小的磁畴，也可以检测出放大的再现信号的强度，可以获得优异的C / N。

公开(公告)号：US06226234B1

公开(公告)日：2001-05-01

申请号：US09091480

申请日：1998-06-19

申请人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

发明人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593

摘要： A magneto-optic recording medium includes a second auxiliary magnetic film, a first auxiliary magnetic film and a magneto-optic recording film on a substrate. The auxiliary magnetic films change from in-plane magnetization to vertical magnetization at critical temperatures TCR1 and TCR2. Since they have the relation TCR1>TCR2, the magnetic domain transferred from the magneto-optic recording film to the first auxiliary magnetic film at the time of reproduction is expanded in diameter and is transferred to the second auxiliary magnetic film when the temperature profiles of the auxiliary magnetic films inside an optical spot are utilized. The magnetic domain of the magneto-optic recording film can be expanded and transferred, too, by means of magnetostatic coupling by using a non-magnetic film in place of the first auxiliary magnetic film. Pulse reproduction light subjected to power modulation in synchronism with a reproduction clock can be used at the time of reproduction. Even when a very small magnetic domain is recorded, the intensity of an amplified reproduction signal can be detected and excellent C/N can be obtained.

摘要翻译： 磁光记录介质包括在基板上的第二辅助磁膜，第一辅助磁膜和磁光记录膜。 在临界温度TCR1和TCR2下，辅助磁膜从面内磁化转变为垂直磁化。 由于它们具有关系TCR1> TCR2，所以在再现时从磁光记录膜转移到第一辅助磁性膜的磁畴的直径扩大并且当第二辅助磁性膜的温度分布 利用光点内的辅助磁膜。 磁光记录膜的磁畴也可以通过使用非磁性膜代替第一辅助磁性膜的静磁耦合来扩展和转移。 在再现时可以使用经受与再现时钟同步的功率调制的脉冲再现光。 即使记录非常小的磁畴，也可以检测出放大的再现信号的强度，可以获得优异的C / N。

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：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：US06404705B1

公开(公告)日：2002-06-11

申请号：US09042020

申请日：1998-03-13

申请人： Hitoshi Watanabe ,  Norio Ohta ,  Masashi Suenaga

发明人： Hitoshi Watanabe ,  Norio Ohta ,  Masashi Suenaga

IPC分类号： G11B1100

CPC分类号： G11B11/10573 ,  G11B11/10541 ,  G11B11/10595

摘要： A magneto-optical disk apparatus and an adjustment method of a head mechanism are provided for strictly and quickly adjusting a setting position of a magnetic head with respect to an optical axis of an optical head. The adjustment method is executed by the following steps. A magnetic super resolution type magneto-optical disk is mounted to the magneto-optical disk apparatus provided with the optical head and the magnetic head. Then, an external magnetic field from the magnetic head is applied onto the magneto-optical disk as applying a laser beam of a reproduction level onto the magneto-optical disk. Then, a reproduction signal output read from the magneto-optical disk is detected concurrently with the application of the external magnetic field. Next, a fine adjustment mechanism is operated so that the reproduction signal output is made maximum with respect to the direction of the external magnetic field, for the purpose of sequentially changing a setting position of the magnetic head with respect of the optical axis of the optical head.

摘要翻译： 提供一种磁光盘装置和头机构的调整方法，用于严格且快速地调整磁头相对于光学头的光轴的设定位置。 调整方法通过以下步骤执行。 磁性超分辨率型磁光盘被安装到设置有光头和磁头的磁光盘装置上。 然后，将磁头上的外部磁场施加到磁光盘上，将再现电平的激光束施加到磁光盘上。 然后，与外部磁场的施加同时检测从磁光盘读出的再现信号。 接下来，为了顺序地改变磁头相对于光学的光轴的设置位置的目的，操作微调机构使得再现信号输出相对于外部磁场的方向成为最大值 头。