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21. 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。

22. 发明授权

US5648162A Magneto-optical recording medium and a method of recording and/or reproducing using the same 失效
标题翻译：磁光记录介质及使用其的记录和/或再现方法
公开(公告)号：US5648162A
公开(公告)日：1997-07-15
申请号：US177096
申请日：1993-12-30
申请人： Junji Hirokane , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Junji Hirokane , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10521 , G11B11/10591 , Y10S428/90 , Y10T428/12736 , Y10T428/12771 , Y10T428/12868 , Y10T428/12896 , Y10T428/12903 , Y10T428/1291 , Y10T428/12917 , Y10T428/12924 , Y10T428/12931 , Y10T428/12937 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium including a base; a readout layer formed on the base; a recording layer formed on the readout layer; and an auxiliary recording layer formed on the recording layer, each of the readout layer, recording layer and auxiliary recording layer being made of an alloy of rare-earth metal and transition metal showing ferrimagnetism. The alloy composition of each layer is determined so that the recording layer has a Curie temperature lower than Curie temperatures of the readout layer and the auxiliary recording layer and has a coercive force higher than coercive forces of the readout layer and the auxiliary recording layer at room temperature and that, when the temperature of the recording layer is raised to near its Curie temperature while perpendicularly applying a uniform recording magnetic field to each layer, a sublattice magnetic moment of the rare-earth metal of the readout layer and a sublattice magnetic moment of the rare-earth metal of the auxiliary recording layer are antiparallel to each other. And, a method of recording information on the magneto-optical recording medium. This structure enables overwriting by light-intensity modulation without using an initializing magnetic field.
摘要翻译：一种包括基底的磁光记录介质; 形成在基底上的读出层; 形成在读出层上的记录层; 以及形成在记录层上的辅助记录层，每个读出层，记录层和辅助记录层由稀土金属和过渡金属的合金制成，显示出铁磁性。确定每层的合金组成，使得记录层的居里温度低于读出层和辅助记录层的居里温度，并且具有高于室内读出层和辅助记录层的矫顽力的矫顽力并且当在每个层垂直地施加均匀的记录磁场的同时将记录层的温度升高到靠近其居里温度时，读出层的稀土金属的亚晶格磁矩和亚晶格磁矩辅助记录层的稀土金属彼此反平行。以及在磁光记录介质上记录信息的方法。该结构能够通过光强度调制而不使用初始化磁场。

23. 发明授权

US5645978A Method for manufacturing optical disk 失效
标题翻译：光盘制造方法
公开(公告)号：US5645978A
公开(公告)日：1997-07-08
申请号：US314194
申请日：1994-09-28
申请人： Tetsuya Inui , Akira Takahashi , Kenji Ohta
发明人： Tetsuya Inui , Akira Takahashi , Kenji Ohta
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/013 , G11B7/09 , G11B7/24 , G11B7/26 , G11B11/10 , G11B11/105 , G03C5/00
CPC分类号： G11B7/24079 , G11B11/10565 , G11B7/0045 , G11B7/007 , G11B7/00718 , G11B7/00745 , G11B7/0938 , G11B7/261 , G11B11/10578 , G11B11/10582 , G11B7/24085
摘要： Methods for manufacturing an optical disk having spiral or concentric grooves and land portions between the grooves are disclosed. In one aspect, the methods include projection of light spots onto a photosensitive material so that areas of the photosensitive material exposed to a first light spot form the pattern of spiral or concentric grooves and that areas of said photosensitive material which correspond to said land portions and are exposed to a second light spot form a predetermined pit pattern.
摘要翻译：公开了用于制造具有螺旋或同心凹槽的光盘和凹槽之间的平台部分的方法。在一个方面，所述方法包括将光点投影到感光材料上，使得暴露于第一光点的感光材料的区域形成螺旋或同心凹槽的图案，以及对应于所述接地部分的所述感光材料的区域，以及暴露于形成预定凹坑图案的第二光点。

24. 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。

25. 发明授权

US5595805A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5595805A
公开(公告)日：1997-01-21
申请号：US318536
申请日：1994-10-05
申请人： Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10584 , G11B11/10586 , Y10S428/90
摘要： A magneto-optical medium has a substrate through which a light beam is transmitted and a recording-reproduction layer. The recording-reproduction layer, which exhibits an in-plane magnetization characteristic at the first temperature while still containing magnetization components in the perpendicular direction corresponding to information, comes to exhibit a perpendicular magnetization characteristic above the second temperature higher than the first temperature. In this magneto-optical recording medium, information is reproduced by utilizing a temperature distribution of the recording-reproduction layer being subjected to irradiation of a light beam and by raising the temperature of a portion within a light spot of the light beam from the first temperature to the second temperature.
摘要翻译：磁光介质具有透射光束的基板和记录再生层。在与信息对应的垂直方向上仍然含有磁化成分的情况下，在第一温度下表现出面内磁化特性的记录再现层在高于第一温度的第二温度以上呈现垂直磁化特性。在该磁光记录介质中，通过利用经受光束照射的记录再生层的温度分布，并且通过将来自第一温度的光束的光斑内的部分的温度升高来再现信息到第二个温度。

26. 发明授权

US5587994A Cartridge used for a disc-shaped recording medium 失效
标题翻译：用于盘形记录介质的墨盒
公开(公告)号：US5587994A
公开(公告)日：1996-12-24
申请号：US321451
申请日：1994-10-11
申请人： Toshikazu Nagaura , Zenjiro Yamashita , Kazuhiko Arikawa , Kenji Ohta
发明人： Toshikazu Nagaura , Zenjiro Yamashita , Kazuhiko Arikawa , Kenji Ohta
IPC分类号： G11B23/00 , G11B23/03 , G11B23/033 , G11B17/03
CPC分类号： G11B23/0035 , G11B23/0307
摘要： A cartridge provided with a case for housing an optical disk so that it can be driven and rotated. A recessed section is formed around the peripheral edge of the center hole of the optical disk. A hub, which is used for clamping the optical disk by the use of a magnetic force, is formed into a hat-shape, and it is placed at the recessed section. The height of the hub is set to be greater than the gap between the optical disk and the cartridge case. Without the necessity of fixing the hub to the disk, this arrangement makes it possible to prevent the hub from coming off from the recessed section. Thus, the arrangement eliminates the fixing process between the hub and the optical disk as well as maintaining the clamping function of the hub, thereby making it possible to reduce the manufacturing cost.
摘要翻译：具有容纳光盘以使其能够被驱动和旋转的壳体的盒。在光盘的中心孔的周缘周围形成凹部。用于通过使用磁力将光盘夹持的轮毂形成帽状，并且被放置在凹部。集线器的高度被设定为大于光盘和盒壳体之间的间隙。不需要将轮毂固定到盘上，这种布置使得可以防止轮毂从凹部脱落。因此，该结构消除了轮毂和光盘之间的固定过程以及保持轮毂的夹紧功能，从而可以降低制造成本。

27. 发明授权

US5581538A Recording/reproducing apparatus with a probe to detect data recorded in pits and projections of a recording medium 失效
标题翻译：具有用于检测记录在记录介质的凹坑和凸起中的数据的探针的记录/再现装置
公开(公告)号：US5581538A
公开(公告)日：1996-12-03
申请号：US358545
申请日：1994-12-14
申请人： Tetsuya Inui , Hirotsugu Matoba , Susumu Hirata , Yorishige Ishii , Kenji Ohta
发明人： Tetsuya Inui , Hirotsugu Matoba , Susumu Hirata , Yorishige Ishii , Kenji Ohta
IPC分类号： G11B9/14 , G01Q60/12 , G11B9/00 , H01L21/66
CPC分类号： G11B9/1445 , G11B9/1454 , G11B9/1472 , G11B9/149 , B82Y10/00 , G01Q80/00 , Y10S977/947
摘要： A probe is displaced relative to a recording medium according to a drive voltage. A chip is provided at an end of the probe. The chip serves to form pits and projections on a surface of the recording medium according to a recording voltage (Vp2) and serves to output a current signal responsive to the pits and projections with a reproducing voltage (Vp1) applied. A voltage generator generates the recording voltage and the reproducing voltage based on address and data signals. A sample-hold unit samples at a specified frequency a current signal obtained from a no-recording area of the recording medium by the chip and produces an output voltage signal. A reproducing unit demodulates and reproduces increment and decrement of the current signal obtained from a recording area of the recording medium by the chip. A control unit controls recording and reproduction. The control unit outputs such a drive voltage that the interval between the chip and the recording medium is maintained constant by feedback control based on the voltage signal derived from the sample-hold unit. The control unit controls the recording so that no-recording areas and recording areas are arranged alternately.
摘要翻译：根据驱动电压，探针相对于记录介质移位。在探头的一端设有芯片。该芯片用于根据记录电压（Vp2）在记录介质的表面上形成凹坑和突起，并用于以施加的再现电压（Vp1）响应于凹坑和突起输出电流信号。电压发生器基于地址和数据信号产生记录电压和再现电压。采样保持单元以指定频率对由芯片从记录介质的无记录区域获得的当前信号进行采样，并产生输出电压信号。再现单元解调并再现由芯片从记录介质的记录区域获得的当前信号的增量和减量。控制单元控制记录和再现。控制单元输出通过基于从采样保持单元导出的电压信号的反馈控制将芯片与记录介质之间的间隔保持恒定的驱动电压。控制单元控制记录，使得不记录区域和记录区域交替布置。

28. 发明授权

US5581397A Optical-fiber amplifier 失效
标题翻译：光纤放大器
公开(公告)号：US5581397A
公开(公告)日：1996-12-03
申请号：US609893
申请日：1996-03-04
申请人： Takanori Maki , Kenji Ohta
发明人： Takanori Maki , Kenji Ohta
IPC分类号： H01S3/07 , H01S3/06 , H01S3/094 , H01S3/10 , H01S3/00
CPC分类号： H01S3/094003 , H01S3/09408 , H01S5/06825 , H01S5/4012
摘要： Pumping light from two pumping light sources is supplied to an optical coupler which splits it into two output beams and supplies the beams to erbium-doped optical fibers in the forward and backward paths, respectively. To avoid the detrimental effect caused by interference that occurs when the wavelengths of the two pumping light sources coincide perfectly with each other, the two pumping light sources are activated alternately by clock signals that are 180.degree. out of phase with each other. Alternatively, optical shutters may be provided between the optical coupler and the respective pumping light source, and these optical shutters may be opened alternately. If one or other of the pumping light sources stops due to failure, the average level of the pumping light supplied to the optical fibers will drop. To compensate for this, it will be preferable to make provision so that when a fault is detected in one light source, pumping light is continuously supplied to the optical coupler from the other pumping light source.
摘要翻译：来自两个泵浦光源的泵浦光被提供给光耦合器，其将其分成两个输出光束并将光束分别提供给前向和后向路径中的掺铒光纤。为了避免当两个泵浦光源的波长彼此完全一致时发生的干扰引起的有害影响，两个泵浦光源被彼此相差180度的时钟信号交替激活。或者，光学快门可以设置在光耦合器和相应的泵浦光源之间，并且这些光学快门可以交替打开。如果一个或另一个泵浦光源由于故障而停止，则提供给光纤的泵浦光的平均电平将下降。为了补偿这一点，优选的是提供使得当在一个光源中检测到故障时，泵浦光从另一个泵浦光源连续地提供给光耦合器。

29. 外观设计

USD372227S Scanner 失效
公开(公告)号：USD372227S
公开(公告)日：1996-07-30
申请号：US041624
申请日：1995-07-17
申请人： Kenji Ohta
设计人： Kenji Ohta

30. 发明授权

US5477528A 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：US5477528A
公开(公告)日：1995-12-19
申请号：US346586
申请日：1994-11-16
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 , G11B7/00
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。

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