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81. 发明授权

US5631096A Magneto optical memory device 失效
标题翻译：磁光存储器件
公开(公告)号：US5631096A
公开(公告)日：1997-05-20
申请号：US400464
申请日：1995-03-07
申请人： Junsaku Nakajima , Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
发明人： Junsaku Nakajima , Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10508 , G11B11/10515 , G11B11/10586 , G11B11/10521 , Y10S428/90
摘要： A magneto-optical memory device is provided with a base whereon a first magnetic film which exhibits in-plane magnetization at room temperature and exhibits perpendicular magnetization at above room temperature, a second magnetic film having its Curie temperature above room temperature; and a third magnetic film having its Curie temperature set above the Curie temperature of the second magnetic film, which exhibits perpendicular magnetization in a temperature range between room temperature and Curie temperature are laminated in this order. When recording, the temperature of the third magnetic film is raised to the vicinity of its Curie temperature, and information is recorded thereon by an external magnetic field. As the magnetization of the second magnetic film having a temperature rise above its Curie temperature disappears, an exchange coupling force is not exerted between the first magnetic film and the third magnetic film. In the above arrangement, since the effect from the magnetization of the first magnetic film can be avoided, information can be recorded on the third magnetic film by a small external magnetic field, thereby permitting a reduction in electric power consumption and in the size of the apparatus.
摘要翻译：磁光存储器件设置有第一磁性膜的基底，第一磁性膜在室温下表现出平面内的磁化强度，并且在室温以上表现出垂直的磁化强度，第二磁性膜的居里温度高于室温; 并且将其居里温度设定在高于室温和居里温度之间的温度范围内的垂直磁化强度的第二磁性膜的居里温度的第三磁性膜依次层叠。当记录时，第三磁性膜的温度升高到其居里温度附近，并且通过外部磁场在其上记录信息。随着具有高于其居里温度的温度升高的第二磁性膜的磁化消失，在第一磁性膜和第三磁性膜之间不产生交换耦合力。在上述结构中，由于可以避免第一磁性膜的磁化的影响，所以可以通过小的外部磁场将信息记录在第三磁性膜上，从而能够降低电力消耗和仪器。

82. 发明授权

US5615182A Magneto-optical disk and the reproducing method thereof 失效
标题翻译：磁光盘及其再现方法
公开(公告)号：US5615182A
公开(公告)日：1997-03-25
申请号：US511283
申请日：1995-08-04
申请人： Yoshiteru Murakami , Junsaku Nakajima , Akira Takahashi , Junichiro Nakayama , Kenji Ohta
发明人： Yoshiteru Murakami , Junsaku Nakajima , Akira Takahashi , Junichiro Nakayama , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10595
摘要： A magneto-optical disk, which possesses a disc-shaped substrate and a recording layer composed of a perpendicular magnetization film that is formed on the substrate, characterized in having: an area wherein magnetic domains having an upward magnetization and magnetic domains having a downward magnetization are alternately aligned along at least one circuit of the disk, the area being formed on the recording layer, the length of the magnetic domains having the upward magnetization being virtually equal to the length of the magnetic domains having the downward magnetization. This invention also has a reproducing method which is characterized in that, when information is reproduced by projecting a light beam onto the magneto-optical recording disk, the intensity of the light beam is adjusted so as to maximize the amplitude of a reproduced signal that is obtained from the area. With the above arrangement, a high-quality reproduced signal can be obtained independent of the characteristics of individual magneto-optical disks.
摘要翻译：一种磁光盘，其具有盘形基板和由形成在基板上的垂直磁化膜构成的记录层，其特征在于具有：具有向上磁化的磁畴和具有向下磁化的磁畴的区域沿着盘的至少一个电路交替排列，所述区域形成在记录层上，具有向上磁化的磁畴的长度实质上等于具有向下磁化的磁畴的长度。本发明还具有一种再现方法，其特征在于，当通过将光束投射到磁光记录盘上来再现信息时，调整光束的强度，以使得再现信号的幅度最大化从该地区获得。通过上述配置，可以独立于各个磁光盘的特性来获得高质量的再生信号。

83. 发明授权

US5499229A Track scanning for reproducing address information by crosstalk 失效
标题翻译：跟踪扫描以通过串扰再现地址信息
公开(公告)号：US5499229A
公开(公告)日：1996-03-12
申请号：US346759
申请日：1994-11-30
申请人： Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
发明人： Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
IPC分类号： G11B7/24 , G11B7/007 , G11B7/09 , G11B11/10 , G11B11/105 , G11B27/10 , G11B7/00
CPC分类号： G11B11/10515 , G11B11/10578 , G11B7/00718 , G11B7/00745 , G11B7/0938
摘要： On an optical disk, information is recorded on both grooves and lands as guide tracks for guiding a light beam. The width of each groove and that of each land are set substantially equal to each other. A plurality of series of pits representing address information are formed in the grooves so that the series of pits in a groove and the series of pits in the adjacent grooves are located in different radial directions of the optical disk. Address pits are not formed in any of the tracks formed by the lands. When the light beam scans the track on the land, the address information is obtained by crosstalk of the series of address pits formed in the track on the groove. This structure enables the management of the addresses of tracks having thereon no address pits. When obtaining the address information by reproducing the series of address pits on the groove, since no crosstalk occurs, accurate address information is obtained.
摘要翻译：在光盘上，信息被记录在两个凹槽和平台上，作为用于引导光束的导轨。每个槽的宽度和每个焊盘的宽度被设定为基本相等。在凹槽中形成表示地址信息的多个凹坑系列，使得凹槽中的一系列凹坑和相邻凹槽中的一系列凹坑位于光盘的不同径向方向上。地址凹坑不形成在由平台形成的任何轨道中。当光束扫描地面上的轨道时，通过在凹槽中的轨道中形成的一系列地址坑的串扰获得地址信息。这种结构使得能够管理其上没有地址坑的轨道的地址。当通过在凹槽上再现一系列地址坑来获得地址信息时，由于没有发生串扰，因此获得了准确的地址信息。

84. 发明授权

US5475658A Magneto-optical recording device for improving C/N ratio 失效
标题翻译：用于提高C / N比的磁光记录装置
公开(公告)号：US5475658A
公开(公告)日：1995-12-12
申请号：US320135
申请日：1994-10-07
申请人： Akira Takahashi , Yoshiteru Murakami , Kenji Ohta
发明人： Akira Takahashi , Yoshiteru Murakami , Kenji Ohta
IPC分类号： G11B11/10 , G11B5/02 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10595 , G11B11/10508
摘要： A magneto-optical recording device having a light source and external magnetic field applying apparatus, which records information on a magneto-optical recording medium with a magnetic field modulation method. The device has a controller which stops the irradiation of a light beam when switching the direction of applying external magnetic field during recording. This allows an area where information is recorded with a low external magnetic field to be smaller, and thereby achieving reproduced signal of improved quality.
摘要翻译：一种具有光源和外部磁场施加装置的磁光记录装置，其利用磁场调制方法在磁光记录介质上记录信息。该装置具有在记录期间切换施加外部磁场的方向时停止光束的照射的控制器。这允许以低外部磁场记录信息的区域更小，从而实现质量提高的再现信号。

85. 发明授权

US5059473A Optical recording medium and manufacturing method thereof 失效
标题翻译：光学记录介质及其制造方法
公开(公告)号：US5059473A
公开(公告)日：1991-10-22
申请号：US308018
申请日：1989-02-09
申请人： Akira Takahashi , Michinobu Mieda , Yoshiteru Murakami , Junichiro Nakayama , Tomoyuki Miyake , Kenji Ohta
发明人： Akira Takahashi , Michinobu Mieda , Yoshiteru Murakami , Junichiro Nakayama , Tomoyuki Miyake , Kenji Ohta
IPC分类号： G11B7/24 , G11B7/26 , G11B11/10 , G11B11/105
CPC分类号： G11B11/10584 , G11B7/26 , Y10S430/146 , Y10T428/239 , Y10T428/24529 , Y10T428/31507
摘要： An optical recording medium, which is used as an optical disc, optical card or the like for optically recording, reproducing, erasing and the like, includes a center substrate having formed on at least one side thereof recesses and/or protrusions. Recording films are formed on both sides thereof and transparent protective plates bonded to these recording films respectively. This arrangement substantially eliminates warping of the substrates constituting the optical recording medium and exfoliation of substrates or the like even when the optical recording medium is subjected to sudden changes in temperature. This optical recording medium demonstrates enhanced optical performance and protective effect. The selecting of the transparent protective plate is simplified because the forming recesses and/or protrusions is not a factor. By producing an optical recording medium utilizing the above features, the carrier-to-noise ratio and isotropy of the medium is improved.

86. 发明授权

US4858212A Recording method on magnetooptical disc with laser magnetic field 失效
标题翻译：具有激光磁场的磁光盘的记录方法
公开(公告)号：US4858212A
公开(公告)日：1989-08-15
申请号：US222422
申请日：1988-07-20
申请人： Akira Takahashi , Yoshiteru Murakami , Michinobu Mieda , Tomoyuki Miyake , Kenji Ohta
发明人： Akira Takahashi , Yoshiteru Murakami , Michinobu Mieda , Tomoyuki Miyake , Kenji Ohta
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105
CPC分类号： G11B11/10519 , G11B11/10515
摘要： A magnetooptical disc is initialized by reversing the direction of magnetization at fixed intervals and the direction of external magnetic field applied to it is reversed for each overwrite recording by exposure to laser light.
摘要翻译：通过以固定的间隔反转磁化方向来初始化磁光盘，并且通过暴露于激光对每个重写记录施加到其上的外部磁场的方向相反。

87. 发明授权

US4754355A Optical head 失效
标题翻译：光头
公开(公告)号：US4754355A
公开(公告)日：1988-06-28
申请号：US36427
申请日：1987-04-09
申请人： Akira Takahashi , Toshihisa Deguchi , Yoshiteru Murakami , Michinobu Mieda , Kazuo Van , Kenji Ohta
发明人： Akira Takahashi , Toshihisa Deguchi , Yoshiteru Murakami , Michinobu Mieda , Kazuo Van , Kenji Ohta
IPC分类号： G11B7/135 , G11B7/16 , G11B11/10 , G11B11/105 , G11B5/32
CPC分类号： G11B11/10532
摘要： An optical head for a magneto-optical disk, including a diaphragm for cutting at least an outer portion of a bundle of rays, which is provided in the course of an optical system of a signal detecting portion.
摘要翻译：一种用于磁光盘的光学头，包括在信号检测部分的光学系统的过程中设置的用于切割至少一束光线的外部的光阑。

88. 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。

89. 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。

90. 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。

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