公开(公告)号：EP1351232A2

公开(公告)日：2003-10-08

申请号：EP03007540.2

申请日：2003-04-01

申请人： SONY CORPORATION

发明人： Tobita, Minoru ,  Teraoka, Yoshiyuki ,  Tanaka, Tomiji ,  Hattori, Masato ,  Ishii, Tamotsu

IPC分类号： G11B11/105

CPC分类号： G11B11/10508 ,  G11B11/10515 ,  G11B11/10595 ,  G11B19/28 ,  G11B20/00086 ,  G11B20/10 ,  G11B20/1217 ,  G11B20/18 ,  G11B27/034 ,  G11B27/036 ,  G11B27/105 ,  G11B27/19 ,  G11B27/24 ,  G11B27/32 ,  G11B27/329 ,  G11B27/34 ,  G11B2020/1269 ,  G11B2020/1272 ,  G11B2220/20 ,  G11B2220/2529

摘要： An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.

摘要翻译： 一种信息记录/记录再现装置和再现信息和从磁光存储介质确实包括用于记录的第一磁性层至少信息，一种用于调整切换结缔组织力的第二磁性层，和用于移动的第三磁性层 记录标记用于信息再现的磁壁。 三个层被堆叠在一个透明基板，以弥补该存储介质。 该信息记录/再现装置包括在光学头和磁头。 该光学头具有一光源和物镜的，所述光源被配置为具有大约780nm的波长来发射至少一个激光束，具有约12:45和数值孔径的物镜被配置成聚焦激光束 从光源到束斑用于发射到磁 - 光存储介质。 磁头是用于施加记录磁场的磁光存储介质。

公开(公告)号：EP1962286A1

公开(公告)日：2008-08-27

申请号：EP08002853.3

申请日：2008-02-15

申请人： Sony Corporation

发明人： Tanaka, Tomiji ,  Hara, Masaaki ,  Tokuyama, Kazutatsu ,  Seko, Satoru ,  Yamada, Shinji ,  Okada, Hitoshi

IPC分类号： G11B7/0065 ,  G11B7/135 ,  G03H1/22 ,  G02F1/1343

CPC分类号： G11B7/1362 ,  G03H1/22 ,  G03H1/265 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/0065 ,  G11B7/1369

摘要： A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source so that a hologram recording medium is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the hologram recording medium by irradiation with the first reference light, to a light receiving element having a plurality of pixels; and a second reference light path leading second reference light, having the same polarization direction as that of the diffracted light, from the laser light source to the light receiving element. The second reference light path is provided with a phase modulating element so that the phase difference between the diffracted light and the second reference light in a light receiving surface of the light receiving element is adjusted within a predetermined range.

摘要翻译： 全息图再现装置包括：第一参考光路，引导来自激光光源的激光，使全息图记录介质用第一参考光照射; 通过照射第一参考光从全息图记录介质产生的衍射光的衍射光路到具有多个像素的光接收元件; 以及第二参考光路，其将具有与衍射光的偏振方向相同的偏振方向的第二参考光从激光光源引导到光接收元件。 第二参考光路设置有相位调制元件，使得光接收元件的光接收表面中的衍射光和第二参考光之间的相位差被调节在预定范围内。

公开(公告)号：EP0288069A3

公开(公告)日：1989-03-29

申请号：EP88106429.9

申请日：1988-04-21

申请人： SONY CORPORATION

发明人： Aratani, Katsuhisa ,  Nakaoki, Ariyoshi ,  Tanaka, Tomiji

IPC分类号： G11B11/00 ,  G11B13/04

CPC分类号： G11B11/10519 ,  G11B11/10506 ,  G11B11/10591 ,  Y10S428/928 ,  Y10T428/12632 ,  Y10T428/12951

摘要： A thermomagnetic recording method is disclosed using a thermomagnetic recording medium where first, second and third magnetic thin films (1-3) each formed of rare-earth and transition metals are sequentially superposed to form layers in a magnetically coupled manner. The recording is carried out by heating the thermomagnetic recording medium under a predetermined magnetic field perpendicular to the film plane thereof while selectively modulating, in accordance with data to be recorded, a first heating state at a first temperature T1 substantially above the Curie point Tc1 of the first magnetic thin film (1) and adequate to hold the sublattice magnetization of the transition metal of the second magnetic thin film in a predetermined direction, and a second heating state at a second temperature T2 substantially above the Curie point Tc1 and adequate to invert the sublattice magnetization of the transition metal of the second magnetic thin film (2) to the reverse of the predetermined direction. In a cooling step subsequent to the first and second heating states, maintaining the sublattice magnetization of the third magnetic thin film in a predetermined direction while orienting the sublattice magnetization of said second magnetic thin film to be directionally coincident with that of the third magnetic thin film at a temperature below the first temperature T1 without directionally inverting the sublattice magnetization of the first magnetic thin film (1).

公开(公告)号：EP1045381A2

公开(公告)日：2000-10-18

申请号：EP00107877.3

申请日：2000-04-12

申请人： SONY CORPORATION

发明人： Nakayama, Hiroshi ,  Ootomo, Katsuhiko ,  Tanaka, Tomiji ,  Endo, Somei

IPC分类号： G11B11/105

CPC分类号： G11B11/10591

摘要： A first dielectric film 3, a first magnetic film 4, a second magnetic film 5, a second dielectric film 6, and a reflecting film 7 are formed on a substrate 2, one upon another in the order they are mentioned. The first magnetic film 4 is made of GdFeCo and has a predetermined Curie point. The second magnetic film 5 is made of TbFeCo and has a Curie point lower than that of the first magnetic film 4. The first magnetic film 4 has an oxide film.

摘要翻译： 在基板2上依次形成第一电介质膜3，第一磁性膜4，第二磁性膜5，第二电介质膜6和反射膜7。 第一磁性膜4由GdFeCo制成并具有预定的居里点。 第二磁性膜5由TbFeCo制成并具有比第一磁性膜4低的居里点。第一磁性膜4具有氧化膜。

公开(公告)号：EP0257530A3

公开(公告)日：1990-09-26

申请号：EP87111990.5

申请日：1987-08-18

申请人： SONY CORPORATION

发明人： Aratani, Katsuhisa ,  Tanaka, Tomiji

IPC分类号： G11B11/10 ,  G11B13/04

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10521 ,  G11B11/10586

摘要： Thermomagnetic recording method using a thermomagnetic recording medium having a superposed layer (5) of magnetically coupled first and second magnetic thin films (3,4) is disclosed.The magnetic thin film includes a portion where the respective magnetic moments of the first and second thin films are coupled in opposite directions to each other(mode C). The method comprises heating the superposed layer in a first heating state in which the superposed layer (5) is heated at a temperature T₁ which is higher than the Curie temperature T C1 of the first magnetic thin film (3) and will not cause the inversion of the magnetic moment of the second magnetic thin film (4) or in a second heating state in which the superposed layer (5) is heated at a temperature T₂ which is higher than the Curie temperature T C1 and is high enough to cause the inversion of the magnetic moment of the second magnetic thin film (4) by modulating heating condition according to an information signal to be recorded; and forming recording magnetization on the thermomagnetic recording medium by cooling the heated superposed layer of the thermomagnetic recording medium. In the method, real-time overwriting information can be achieved without using a modulated external magnetic fieled.

公开(公告)号：EP1962286B1

公开(公告)日：2011-05-25

申请号：EP08002853.3

申请日：2008-02-15

申请人： Sony Corporation

发明人： Tanaka, Tomiji ,  Hara, Masaaki ,  Tokuyama, Kazutatsu ,  Seko, Satoru ,  Yamada, Shinji ,  Okada, Hitoshi

IPC分类号： G11B7/0065 ,  G11B7/135 ,  G03H1/22 ,  G02F1/1343

CPC分类号： G11B7/1362 ,  G03H1/22 ,  G03H1/265 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/0065 ,  G11B7/1369

公开(公告)号：EP0257530B1

公开(公告)日：1993-01-27

申请号：EP87111990.5

申请日：1987-08-18

申请人： SONY CORPORATION

发明人： Aratani, Katsuhisa ,  Tanaka, Tomiji

IPC分类号： G11B11/10 ,  G11B13/04

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10521 ,  G11B11/10586

公开(公告)号：EP0288069B1

公开(公告)日：1992-10-07

申请号：EP88106429.9

申请日：1988-04-21

申请人： SONY CORPORATION

发明人： Aratani, Katsuhisa ,  Nakaoki, Ariyoshi ,  Tanaka, Tomiji

IPC分类号： G11B11/00 ,  G11B13/04

CPC分类号： G11B11/10519 ,  G11B11/10506 ,  G11B11/10591 ,  Y10S428/928 ,  Y10T428/12632 ,  Y10T428/12951

公开(公告)号：EP0257530A2

公开(公告)日：1988-03-02

申请号：EP87111990.5

申请日：1987-08-18

申请人： SONY CORPORATION

发明人： Aratani, Katsuhisa ,  Tanaka, Tomiji

IPC分类号： G11B11/10 ,  G11B13/04

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10521 ,  G11B11/10586

摘要： Thermomagnetic recording method using a thermomagnetic recording medium having a superposed layer (5) of magnetically coupled first and second magnetic thin films (3,4) is disclosed.The magnetic thin film includes a portion where the respective magnetic moments of the first and second thin films are coupled in opposite directions to each other(mode C). The method comprises heating the superposed layer in a first heating state in which the superposed layer (5) is heated at a temperature T₁ which is higher than the Curie temperature T C1 of the first magnetic thin film (3) and will not cause the inversion of the magnetic moment of the second magnetic thin film (4) or in a second heating state in which the superposed layer (5) is heated at a temperature T₂ which is higher than the Curie temperature T C1 and is high enough to cause the inversion of the magnetic moment of the second magnetic thin film (4) by modulating heating condition according to an information signal to be recorded; and forming recording magnetization on the thermomagnetic recording medium by cooling the heated superposed layer of the thermomagnetic recording medium.
In the method, real-time overwriting information can be achieved without using a modulated external magnetic fieled.

摘要翻译： 使用具有磁耦合的第一和第二磁性薄膜的重叠层（5）（3,4）一个热磁记录介质的热磁记录方法是disclosed.The磁性薄膜包括一部分，其中所述第一和第二薄膜的respectivement磁矩 膜被耦合在相反的方向上彼此（模式C）。 该方法包括加热其中叠加层（5）是在温度T1加热在第一加热状态下的叠加层中的所有比所述第一磁性薄膜的居里温度TC1更高（3）并不会造成的反转 第二磁性薄膜的磁矩（4）或在其中叠加层（5）是在温度T2下加热的第二加热状态的所有比居里温度TC1更高并且是高到足以引起的反转 第二磁性薄膜（4）由在信息信号要被记录调制加热条件gemäß到的磁矩; 以及形成通过冷却热磁记录介质的加热叠置的层记录热磁记录介质上磁化。 在该方法中，实时信息重写可以在不使用外部调制磁fieled来实现。

公开(公告)号：EP2026343A3

公开(公告)日：2009-11-04

申请号：EP08158824.6

申请日：2008-06-24

申请人： Sony Corporation

发明人： Tanaka, Tomiji

IPC分类号： G11B7/0065 ,  G03H1/26

CPC分类号： G11B7/0065 ,  G03H1/18 ,  G03H1/265 ,  G03H2001/186

摘要： A hologram recording/reconstructing apparatus includes a spatial modulator (19) in which a reference beam region and a reconstruction beam region are formed, and a controller (100) configured to control a range of the reference beam region and a range of the reconstruction beam region. According to a temperature of a hologram recording medium (48) during recording, the controller sets the range of the reference beam region to a first predetermined range and thereby sets a range of an incident angle of a reference beam on the hologram recording medium to a first predetermined angle range. According to a temperature of the hologram recording medium during reconstruction of recorded data, the controller sets the range of the reconstruction beam region to a second predetermined range and thereby sets a range of an incident angle of a reconstruction beam on the hologram recording medium to a second predetermined angle range.