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31. 发明授权

US5683803A Magneto-optical recording medium and method of recording and reproducing using the same 失效
标题翻译：磁光记录介质及使用其的记录和再现方法
公开(公告)号：US5683803A
公开(公告)日：1997-11-04
申请号：US433088
申请日：1995-05-03
申请人： Junichiro Nakayama , Michinobu Mieda , Junji Hirokane , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Michinobu Mieda , Junji Hirokane , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66 , B32B5/16
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10515 , G11B11/10523 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer being laminated. When information is to be recorded on the first magnetic layer, first, a magnetization direction in the second magnetic layer is arranged in one direction with an application of an initialization magnetic field. Then, an intensity modulated light beam is projected while applying thereto a recording magnetic field so as to change the magnetization direction in the second magnetic layer. Thereafter, the magnetization direction in the second magnetic layer is copied to the first magnetic layer, thereby recording information. The first magnetic layer has a magnetization in an intermediate direction between a perpendicular direction and an in-plane direction at room temperature, while has a perpendicular magnetization at above a predetermined temperature. Therefore, a smaller exchange coupling force is exerted from the first magnetic layer to the second magnetic layer at room temperature, thereby enabling a rewriting information with a smaller initialization magnetic field compared with the conventional method, thereby achieving a reduction in size of the apparatus and power conservation.
摘要翻译：磁光记录介质包括层叠的第一磁性层和第二磁性层。当要在第一磁性层上记录信息时，首先，通过施加初始化磁场，将第二磁性层中的磁化方向布置在一个方向上。然后，施加强度调制光束，同时向其施加记录磁场，以改变第二磁性层中的磁化方向。此后，将第二磁性层中的磁化方向复制到第一磁性层，从而记录信息。第一磁性层在室温下具有在垂直方向和面内方向之间的中间方向上的磁化强度，同时具有高于预定温度的垂直磁化强度。因此，与常规方法相比，在室温下从第一磁性层向第二磁性层施加较小的交换耦合力，从而能够实现与常规方法相比具有较小初始化磁场的重写信息，从而实现装置的尺寸减小省电。

32. 发明授权

US5673250A Optical recording medium having pit rows on every other boundary and reproducing method thereof 失效
标题翻译：在每隔一个边界具有凹坑排的光记录介质及其再现方法
公开(公告)号：US5673250A
公开(公告)日：1997-09-30
申请号：US468776
申请日：1995-06-06
申请人： Michinobu Mieda , Junji Hirokane , Akira Takahashi , Kenji Ohta , Shigeo Terashima
发明人： Michinobu Mieda , Junji Hirokane , Akira Takahashi , Kenji Ohta , Shigeo Terashima
IPC分类号： G11B7/24 , G11B7/00 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/09 , G11B7/26 , G11B11/10 , G11B11/105 , G11B27/10
CPC分类号： G11B7/24085 , G11B11/10565 , G11B7/00718 , G11B7/0938 , G11B7/261
摘要： Grooves and lands are provided to a magneto-optical disk so as to be alternately arranged, and recording bit strings are formed on the grooves and lands respectively so that information is recorded. Moreover, pit rows are formed on boundary sections between the adjoining grooves and lands so that address information of a recording/reproducing track is recorded, and the pit rows are formed every other boundary section. When the grooves and the lands are scanned as the recording/reproducing track by a light, an address of the recording/reproducing track is read out from the pit rows, and successively, discrimination is made whether the recording/reproducing track which is scanned by an optical spot is the groove or the land. This prevents crosstalk which causes inclusion of address information in the next pit rows, thereby, making it possible to obtain accurate address information. Moreover, since a total number of formed pit rows can be decreased and accuracy in a shape of pits is relieved, an optical recording medium can be easily produced.
摘要翻译：将槽和焊盘提供给磁光盘以交替布置，并且分别在沟槽和焊盘上形成记录位串，以便记录信息。此外，凹坑行形成在相邻的凹槽和平台之间的边界部分上，从而记录记录/再现轨迹的地址信息，并且每隔一个边界部分形成凹坑行。当通过光将凹槽和平台作为记录/再现轨道进行扫描时，从凹坑行读出记录/再现轨道的地址，并且依次区分是否由一个光点是凹槽或土地。这防止了在下一个凹坑行中包含地址信息的串扰，从而可以获得准确的地址信息。此外，由于可以减少形成的凹坑排的总数，并且可以减轻凹坑形状的精度，因此可以容易地制造光学记录介质。

33. 发明授权

US5170390A Optical recording element and driving system 失效
标题翻译：光学记录元件和驱动系统
公开(公告)号：US5170390A
公开(公告)日：1992-12-08
申请号：US394750
申请日：1989-08-16
申请人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
发明人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
IPC分类号： G11B7/0045 , G11B7/013 , G11B7/09 , G11B7/125 , G11B7/24 , G11B7/24085 , G11B11/105 , G11B19/02
CPC分类号： G11B7/0045 , G11B11/10528 , G11B11/10578 , G11B11/10595 , G11B19/02 , G11B7/0938 , G11B7/126 , G11B7/24 , G11B7/24085
摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of recording units in the same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

34. 发明授权

US5962126A Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer 失效
标题翻译：用于从具有读出层，转印层和记录层的磁光记录介质再现数据的方法和装置
公开(公告)号：US5962126A
公开(公告)日：1999-10-05
申请号：US975517
申请日：1997-11-20
申请人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10586 , Y10S428/90 , Y10T428/26
摘要： The invention features an apparatus and method for reproducing recorded bits from a magneto-optical recording medium. The medium includes a base, a readout layer formed on the base, a transfer layer formed on the readout layer and a recording layer formed on the transfer layer. The readout and recording layers each exhibit perpendicular magnetization in a temperature range between room temperature and, respectively, the readout layer's Curie temperature and the recording layer's Curie temperature. The transfer layer is predominant in-plane magnetization at room temperature and an in-plane to perpendicular magnetization transition occurs at a temperature above room temperature. Also, the recording layer Curie temperature is lower than the Curie temperature of the transfer layer. The reproducing method includes the steps of projecting a light beam, applying a subsidiary magnetic field and reproducing information based on reflected light from the readout layer while applying the subsidiary magnetic field. The light beam is projected onto the readout layer from the side of the base so the in-plane to perpendicular magnetization transition occurs in a portion of the transfer layer, the portion corresponding to a central portion of the light beam spot. The intensity of the subsidiary magnetic field is higher than the coercive force of the readout layer and less than the exchange coupling force exerted from the recording-layer and the transfer layer to the readout layer.
摘要翻译：本发明的特征在于一种用于从磁光记录介质再现记录位的装置和方法。介质包括基底，形成在基底上的读出层，形成在读出层上的转印层和形成在转印层上的记录层。读出和记录层各自在室温和读出层的居里温度和记录层的居里温度之间的温度范围内呈现垂直磁化强度。转移层在室温下是主要的面内磁化，并且在高于室温的温度下发生面内到垂直磁化转变。此外，记录层居里温度低于转印层的居里温度。再现方法包括以下步骤：投射光束，施加辅助磁场，并且在施加辅助磁场的同时基于来自读出层的反射光再现信息。光束从基底侧投射到读出层上，因此在转移层的一部分中发生垂直磁化转变，该部分对应于光束点的中心部分。辅助磁场的强度高于读出层的矫顽力，并且小于从记录层和转印层施加到读出层的交换耦合力。

35. 发明授权

US5754523A Optical memory medium with preformed pit arrangement 失效
公开(公告)号：US5754523A
公开(公告)日：1998-05-19
申请号：US534300
申请日：1995-09-27
申请人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Kazuo Van , Michinobu Mieda , Tetsuya Inui
发明人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Kazuo Van , Michinobu Mieda , Tetsuya Inui
IPC分类号： G11B7/007 , G11B7/013 , G11B7/09 , G11B7/24 , G11B7/24085
CPC分类号： G11B7/0938 , G11B7/00745 , G11B7/24 , G11B7/24085
摘要： In an optical memory medium comprising prepits on which a light spot is impinged to obtain information and, if required, guide grooves: each of those among the prepits which are longer than the diameter of the light spot consists of a series of pit portions and unpitted portions; each of the prepits is sandwiched between two of the discontinuous portions of guide grooves adjacent to each other; the guide grooves have one or more narrow portions, and each of the prepits is sandwiched between two of the narrow portions of guide grooves adjacent to each other; or the guide grooves have one or more long portions, one or more short portions, and narrow portions formed between the long and short portions, and each of the prepits is sandwiched between two of the short portions of guide grooves adjacent to each other.

36. 发明授权

US5719831A Magneto-optical recording medium cartridge which employs magnets 失效
标题翻译：使用磁铁的磁光记录介质盒
公开(公告)号：US5719831A
公开(公告)日：1998-02-17
申请号：US768794
申请日：1996-12-18
申请人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B23/03 , G11B11/00
CPC分类号： G11B23/0321 , G11B11/10552 , G11B23/03
摘要： A magneto-optical disk cartridge includes a magnet which is magnetized substantially parallel to a surface of a magneto-optical disk for generating an initializing magnetic field. This structure permits a reduction in the thickness of the magneto-optical disk cartridge.
摘要翻译：磁光盘盒包括磁体，该磁体基本上平行于磁光盘的表面而被磁化，用于产生初始化磁场。这种结构允许减小磁光盘盒的厚度。

37. 发明授权

US5665467A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5665467A
公开(公告)日：1997-09-09
申请号：US196978
申请日：1994-02-15
申请人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium includes a first magnetic layer, a second magnetic layer and a third magnetic layer respectively made of rare-earth-transition metal alloys which are laminated in this order. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer made of GdFeCo is set such that its Curie temperature is higher than the Curie temperature of the first magnetic layer, coercive force thereof at room temperature is nearly zero, and that it has an in-plane magnetization at room temperature and a transition occurs therein from the in-plane magnetization to the perpendicular magnetization at above a predetermined temperature. The third magnetic layer is set such that it has a perpendicular magnetization in a temperature range of room temperature and its Curie temperature, its Curie temperature is higher than the Curie temperature of the first magnetic layer, and coercive force thereof at room temperature is smaller than the coercive force of the first magnetic layer.
摘要翻译：磁光记录介质包括依次层叠的分别由稀土 - 过渡金属合金制成的第一磁性层，第二磁性层和第三磁性层。第一磁性层在室温和居里温度之间的温度范围内具有垂直磁化强度。由GdFeCo制成的第二磁性层的居里温度设定为高于第一磁性层的居里温度，室温下的矫顽力接近零，在室温下具有面内磁化强度，在从预定温度以上的面内磁化强度向垂直磁化发生。第三磁性层被设定为使其在室温的温度范围内具有垂直磁化强度和居里温度，居里温度高于第一磁性层的居里温度，室温下的矫顽力小于第一磁性层的矫顽力。

38. 发明授权

US5615180A Magneto-optical recording medium and magneto-optical recording apparatus capable of performing a light-modulation overwriting operation 失效
标题翻译：能够执行光调制重写操作的磁光记录介质和磁光记录装置
公开(公告)号：US5615180A
公开(公告)日：1997-03-25
申请号：US198620
申请日：1994-02-18
申请人： Michinobu Mieda , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Michinobu Mieda , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10534 , G11B11/10506 , G11B11/10519 , G11B11/10523
摘要： A magneto-optical disk is provided with a recording layer that exhibits perpendicular magnetization, an intermediate layer wherein in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to perpendicular magnetization occurs as the temperature thereof rises, and an auxiliary layer that is made of a rare-earth-transition-metal alloy and that exhibits perpendicular magnetization, and these layers are laminated in this order. The composition of the rare-earth-transition-metal alloy is set so that the magnetic moment of the rare-earth metal is relatively greater than that of the transition metal at room temperature and the compensation temperature is located between room temperature and the Curie temperature T.sub.c3. A magneto-optical recording apparatus for rewriting information on the magneto-optical disk is provided with a single magnet for applying H.sub.w onto a portion on the magneto-optical disk irradiated by a light beam, as well as for applying H.sub.init having a greater intensity than H.sub.w onto a portion that is apart from the portion irradiated by the light beam. This arrangement makes it possible to achieve a more compact, thinner magneto-optical recording apparatus which allows light-modulation overwriting.
摘要翻译：磁光盘设置有表现出垂直磁化的记录层，其中在室温下发生面内磁化的中间层，并且随着其温度升高而发生从平面内磁化到垂直磁化的转变，辅助层，其由稀土 - 过渡金属合金制成并且呈现垂直磁化，并且这些层依次层压。设定稀土 - 过渡金属合金的组成使得稀土金属的磁矩在室温下比过渡金属的磁矩更大，并且补偿温度位于室温和居里温度之间 Tc3。用于在磁光盘上重写信息的磁光记录装置设置有用于将Hw施加到由光束照射的磁光盘上的部分上的单个磁体，以及用于施加具有比光束更大的强度的Hinit Hw到与光束照射的部分分开的部分。这种布置使得可以实现允许光调制重写的更紧凑，更薄的磁光记录装置。

39. 发明授权

US5335220A Optical recording element and driving system 失效
标题翻译：光学记录元件和驱动系统
公开(公告)号：US5335220A
公开(公告)日：1994-08-02
申请号：US821361
申请日：1992-01-16
申请人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
发明人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
IPC分类号： G11B7/0045 , G11B7/013 , G11B7/09 , G11B7/125 , G11B7/24 , G11B7/24085 , G11B11/105 , G11B19/02 , G11B3/78
CPC分类号： G11B7/0045 , G11B11/10528 , G11B11/10578 , G11B11/10595 , G11B19/02 , G11B7/0938 , G11B7/126 , G11B7/24 , G11B7/24085
摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.
摘要翻译：一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息在同一轨道。每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除光束通过非连续记录区域的非常短的时间。通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

40. 发明授权

US06665235B2 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：磁光记录介质以及用于磁光记录介质的记录和再现方法和光头
公开(公告)号：US06665235B2
公开(公告)日：2003-12-16
申请号：US10214881
申请日：2002-08-08
申请人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
发明人： Yoshiteru Murakami , Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta , Naoyasu Iketani
IPC分类号： G11B1100
CPC分类号： G11B11/10586 , B60T1/005 , F16D63/00 , G11B7/00718 , G11B7/126 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10595
摘要： Featured is a recording and reproducing method of a magneto-optical recording medium including a recording layer for recording thereon information magneto-optically and a readout layer which has in-plane magnetization at room temperature and where a transition occurs from in-plane magnetization to perpendicular magnetization as temperature raises. The method includes projecting a light beam onto such a magneto-optical recording medium so as to form a perpendicularly magnetized area in the readout layer by duplication of the magnetization of said recording layer to the area. In further embodiments, the recording medium further includes an intermediate layer made of non-magnetic film formed between the readout and recording layers and the readout and recording layers are composed of rare-earth transition metal alloys such as TbFeCo (recoding layer) readout layer, made of GdFeCo (readout layer).
摘要翻译：特别是磁光记录介质的记录和再现方法，其包括用于在其上记录磁光信息的记录层和在室温下具有面内磁化的读出层，并且其中从面内磁化转变为垂直磁化随温度升高。该方法包括将光束投影到这种磁光记录介质上，以便通过将所述记录层的磁化复制到该区域而在读出层中形成垂直磁化区域。在另外的实施例中，记录介质还包括由读出和记录层之间形成的非磁性膜制成的中间层，并且读出和记录层由稀土过渡金属合金如TbFeCo（记录层）读出层，由GdFeCo（读出层）制成。

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