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121. 发明授权

US4658393A Optical memory disc 失效
标题翻译：光存储盘
公开(公告)号：US4658393A
公开(公告)日：1987-04-14
申请号：US671865
申请日：1984-11-15
申请人： Kenji Ohta , Akira Takahashi , Tetsuya Inui , Takao Hyuga , Hideyoshi Yamaoka
发明人： Kenji Ohta , Akira Takahashi , Tetsuya Inui , Takao Hyuga , Hideyoshi Yamaoka
IPC分类号： G11B7/24 , G11B7/26 , G11B23/00 , G11B3/70
CPC分类号： G11B7/26 , G11B23/0035 , G11B7/24
摘要： An optical memory disc includes a glass substrate on which a plurality of concentric circular guide grooves (or a spiral groove) are formed for tracking purposes. A centering plate is secured to the glass substrate in a manner that the center of a circular opening formed in the centering plate is exactly adjusted to the center of the plurality of concentric circular guide grooves (spiral groove). The circular opening formed in the centering plate is utilized to drive the optical memory disc on a turntable. Since the circular opening is not formed directly in the glass substrate, the center adjustment is easily conducted, and there is no possibility that the glass substrate is damaged when the circular opening is formed.
摘要翻译：光存储盘包括玻璃基板，其上形成有用于跟踪目的的多个同心圆形导向槽（或螺旋槽）。中心板以将中心盘中形成的圆形开口的中心精确地调整到多个同心圆形导向槽（螺旋槽）的中心的方式固定到玻璃基板。在定心板上形成的圆形开口用于驱动旋转台上的光学存储盘。由于圆形开口不直接形成在玻璃基板中，因此容易进行中心调整，并且在形成圆形开口时玻璃基板不可能被损坏。

122. 发明授权

US4573149A Magneto-optical head assembly with improved detection means 失效
标题翻译：具有改进检测手段的磁光头组件
公开(公告)号：US4573149A
公开(公告)日：1986-02-25
申请号：US437504
申请日：1982-10-28
申请人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Hideyoshi Yamaoka
发明人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Hideyoshi Yamaoka
IPC分类号： G11B7/08 , G11B11/105 , H04N1/21 , G11B11/00
CPC分类号： H04N1/2195 , G11B11/10532 , G11B7/08 , H04N1/2175 , H04N2201/0084 , H04N2201/0089
摘要： A magneto-optical head assembly for a reflection type magneto-optical memory apparatus uses a laser beam for recording, retrieving, and erasing data on a recording medium comprised of a vertical, magnetic, and anisotropic thin film. The light beam emitted from the head assembly is guided to a fixed position on said recording medium. Included are a light detection apparatus for receiving a control signal, and a separate light detection apparatus for receiving a data signal. A beam splitter, to which has been applied a multicoated thin film dielectric body capable of increasing the Kerr rotation angle of the laser beam reflected from the recording medium, is positioned in the optical system through which the laser beam passes.
摘要翻译：用于反射型磁光存储装置的磁光头组件使用激光束在由垂直，磁和各向异性薄膜组成的记录介质上记录，取出和擦除数据。从头组件发射的光束被引导到所述记录介质上的固定位置。包括用于接收控制信号的光检测装置和用于接收数据信号的单独的光检测装置。已经施加有能够增加从记录介质反射的激光束的克尔旋转角度的多层薄膜电介质的分束器位于激光束通过的光学系统中。

123. 发明授权

US4497006A Magneto-optic recording/playback head assembly 失效
标题翻译：磁光记录/回放头组件
公开(公告)号：US4497006A
公开(公告)日：1985-01-29
申请号：US345056
申请日：1982-02-02
申请人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi
发明人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105 , G11B5/32
CPC分类号： G11B11/10
摘要： There is disclosed a head assembly for use in a magneto-optic recording/playback system which includes a memory medium having a magnetic coating having a magnetic anisotropy in a vertical direction. A light beam is applied to the memory medium for recording and reproduction of information. The head assembly includes a polarizing prism and a Faraday effect element in an optical path for the light beam. There is needed only the single polarizer.
摘要翻译：公开了一种在磁光记录/重放系统中使用的头组件，其包括具有在垂直方向上具有磁各向异性的磁性涂层的存储介质。将光束施加到存储介质中用于记录和再现信息。头组件包括用于光束的光路中的偏振棱镜和法拉第效应元件。只需要单个偏光片。

124. 发明授权

US4489139A Magneto-optic memory medium 失效
标题翻译：磁光存储介质
公开(公告)号：US4489139A
公开(公告)日：1984-12-18
申请号：US476345
申请日：1983-03-17
申请人： Kenji Ohta , Akira Takahashi
发明人： Kenji Ohta , Akira Takahashi
IPC分类号： G11B11/105 , B21D39/00
CPC分类号： G11B11/10582 , Y10S428/90 , Y10S428/928 , Y10T428/12535 , Y10T428/12771 , Y10T428/24545 , Y10T428/31678
摘要： A magneto-optic memory medium is disclosed which is made up by an acryl resin substrate having strip-like grooves, a magneto-optic magnetization film disposed on the substrate and having an axis of easy magnetization perpendicular to its surface. The magnetization film is made of amorphous ferromagnetic material such as GdTbFe, GdTbDyFe, SmTbFe, GdDyFe, TbCo or the like. A reflective film is provided overlying the magneto-optic magnetization film.
摘要翻译：公开了一种磁光存储介质，其由具有带状凹槽的丙烯酸树脂基板，设置在基板上的具有垂直于其表面的易于磁化的轴的磁光磁化膜构成。磁化膜由诸如GdTbFe，GdTbDyFe，SmTbFe，GdDyFe，TbCo等的非晶铁磁材料制成。提供覆盖磁光磁化膜的反射膜。

125. 发明授权

US4414650A Magneto-optic memory element 失效
标题翻译：磁光存储元件
公开(公告)号：US4414650A
公开(公告)日：1983-11-08
申请号：US275388
申请日：1981-06-19
申请人： Kenji Ohta , Akira Takahashi , Toshihisa Deguchi
发明人： Kenji Ohta , Akira Takahashi , Toshihisa Deguchi
IPC分类号： G02F1/09 , G03G5/16 , G11B11/10 , G11B11/105 , G11C13/04
CPC分类号： G02F1/09 , G03G5/16 , G11B11/10 , G11B11/10582
摘要： A magneto-optic memory medium comprises a reflector exhibiting reflectance for light used for information reproduction and a magneto-optic magnetization film disposed on the reflector. When light is applied for information reproduction, the light impinges on the magnetization film and reaches the reflector. The light reflected through the reflector and the magnetization film is of use for information reproduction. In a preferred form of the magneto-optic memory medium, there is deposited on a transparent substrate a magnetic film having an axis of easy magnetization perpendicular to its surface. The magnetization film is overlaid with a reflective coating which is shaped into a strip configuration.
摘要翻译：磁光存储介质包括对于用于信息再现的光的反射率和设置在反射器上的磁光磁化膜的反射器。当光施加用于信息再现时，光照射在磁化膜上并到达反射器。通过反射器和磁化膜反射的光可用于信息再现。在磁光存储介质的优选形式中，在透明基板上沉积具有垂直于其表面的易磁化轴的磁性膜。磁化膜被形成为条状构造的反射涂层覆盖。

126. 发明授权

US5922177A Magneto-optical recording medium and producing method thereof 失效
标题翻译：磁光记录介质及其制造方法
公开(公告)号：US5922177A
公开(公告)日：1999-07-13
申请号：US112930
申请日：1998-07-09
申请人： Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
发明人： Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
IPC分类号： C23C14/18 , C23C14/34 , G11B7/26 , G11B11/105 , C23C14/00 , C23C14/32
CPC分类号： C23C14/3407 , C23C14/185 , G11B11/10582 , G11B11/10586 , G11B7/26
摘要： A method to produce a magneto-optical recording medium which includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.
摘要翻译：一种制造磁光记录介质的方法，其包括在室温下具有面内磁化的读出层，并且其中当温度升高时从面内磁化转变为垂直磁化，并且在其上存储信息的记录层磁光学。在通过添加Nd而由GdFeCo制成的读出层中，要添加的Nd的量在垂直于其膜表面的方向上变化，并且Nd的量在光入射侧比在另一侧更大。结果，即使使用具有短波长的激光器，由于防止了磁相互作用的变化而导致由于不期望的记录和再现操作而导致高密度记录，并且也防止再现信号的质量劣化。

127. 发明授权

US5666345A Optical memory medium with predetermined guide tracks and prepits 失效
标题翻译：具有预定导轨和预凹坑的光存储介质
公开(公告)号：US5666345A
公开(公告)日：1997-09-09
申请号：US203619
申请日：1994-02-28
申请人： Akira Takahashi , Tetsuya Inui , Kenji Ohta , Toshihisa Deguchi , Kazuo Van
发明人： Akira Takahashi , Tetsuya Inui , Kenji Ohta , Toshihisa Deguchi , Kazuo Van
IPC分类号： G11B7/007 , G11B7/013 , G11B7/09 , G11B7/24
CPC分类号： G11B7/24085 , G11B7/0938 , G11B7/007
摘要： An optical memory disc medium contains a plurality of guide groove tracks. The guide groove tracks are arranged parallel to each other and they are used for controlling a position of a light beam. There is a land region between the guide groove tracks which is wider than the width of the guide groove tracks as measured in the disc-radial direction. Prepits for providing address information for the guide groove tracks are provided. The prepits are formed on the land regions and interposed between the lateral edges in the disc-radial direction of adjacent parallel guide groove tracks. Each prepit has a width which width is a narrower dimension than the width of each guide groove track as measured in the disc-radial direction.
摘要翻译：光存储盘介质包含多个导槽轨道。引导槽轨道彼此平行地布置，并且它们用于控制光束的位置。在导向槽轨道之间具有比在径向方向上测量的引导槽轨道的宽度宽的区域。提供了用于提供导槽轨道的地址信息的准备。在凹槽区域上形成预凹坑，并且在相邻的平行引导槽轨道的盘径方向上插入横向边缘之间。每个预凹坑具有宽度，该宽度比在径向方向上测量的每个引导槽轨道的宽度更窄。

128. 发明授权

US5477524A Optical memory medium with preformed pit arrangement 失效
标题翻译：具有预制凹坑布置的光学存储介质
公开(公告)号：US5477524A
公开(公告)日：1995-12-19
申请号：US304810
申请日：1994-09-13
申请人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi
发明人： Toshihisa Deguchi , Kenji Ohta , Akira Takahashi
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.
摘要翻译：在包括预定坑的光学存储介质中，其上照射有光斑以获得信息，并且如果需要，导向槽：比该光斑直径长的预凹坑中的每一个由一系列凹坑部分组成，部分每个预凹坑夹在相互邻接的引导槽的两个不连续部分之间; 引导槽具有一个或多个窄部分，并且每个预凹坑夹在彼此相邻的引导槽的两个狭窄部分之间; 或导向槽具有一个或多个长部分，一个或多个短部分和形成在长部分和短部分之间的窄部分，并且每个预凹坑夹在彼此相邻的引导槽的两个短部分之间。

129. 发明授权

US5331612A Magneto-optical recording apparatus using the magnetic field modulation method 失效
标题翻译：使用磁场调制方法的磁光记录装置
公开(公告)号：US5331612A
公开(公告)日：1994-07-19
申请号：US922854
申请日：1992-07-31
申请人： Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
发明人： Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10521 , G11B11/10508 , G11B11/1051 , G11B11/10528 , G11B11/1053 , G11B11/10595
摘要： A magneto-optical recording apparatus which records information through the processes of: first irradiating a light beam onto a magneto-optical recording medium having a recording film; and next applying an external magnetic field that is inverted in response to a recording signal onto the recording film while continuing the first process. In the above arrangement, the intensity of the light beam is dropped upon inversion of the external magnetic field so that information is not recorded. The intensity of the light beam is raised during non-inversion of the external magnetic field so that information is recorded. Further the magneto-optical recording apparatus is provided with a light intensity control device for varying the intensity of the light beam dependent of the lengths of recording bits so that the high-temperature area of the recording film is not widened. Since the width of the recording bits is uniformly maintained, the remaining of the recording bit after overwriting operation can be reduced; thus, the signal quality in reproduction can be enhanced.
摘要翻译：一种磁光记录装置，其通过以下处理记录信息：首先将光束照射到具有记录膜的磁光记录介质上; 并且接着在继续进行第一处理的同时将响应于记录信号反转的外部磁场施加到记录膜上。在上述布置中，光束的强度在外部磁场反转时下降，从而不记录信息。在外部磁场的非反相期间，光束的强度升高，从而记录信息。此外，磁光记录装置设置有光强度控制装置，用于根据记录位的长度改变光束的强度，使得记录膜的高温区域不会变宽。由于记录位的宽度被均匀地保持，所以可以减少重写操作之后的记录位的剩余部分。因此，可以提高再现中的信号质量。

130. 发明授权

US5317555A Optical head device utilizing partially overlapping light spots to read information from a readout layer 失效
标题翻译：使用部分重叠的光点从读出层读取信息的光学头装置
公开(公告)号：US5317555A
公开(公告)日：1994-05-31
申请号：US910837
申请日：1992-07-08
申请人： Akira Takahashi , Yoshiteru Murakami , Junsaku Nakajima , Kenji Ohta
发明人： Akira Takahashi , Yoshiteru Murakami , Junsaku Nakajima , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10545 , G11B11/10515
摘要： A magneto-optical disk has a recording layer whereon recorded bits are formed by the magnetic field modulation method and a readout layer whose axis of easy magnetization is parallel to the recording layer at room temperature, and varies to be perpendicular to the recording layer within a predetermined temperature range between room temperature and the Curie temperature. During reproduction of the recorded bits the first semiconductor laser emits a heating-use light beam to form the first light spot on the readout layer Thus, a ring-shaped region corresponding to the predetermined temperature range exhibits perpendicular magnetic anisotropy and the recorded bits are copied from the recording layer onto the ring-shaped region. As the first light spot is shifted, the ring-shaped region as a readout window of recorded bits is also shifted. Further, the second semiconductor laser emits a reproduction-use light beam such that the second light spot is formed on the readout layer to overlap the first light spot at a rear portion thereof. Consequently, only one recorded bit copied onto the rear portion of the ring-shaped region can be reproduced; therefore, high-quality reproduced signals can be obtained from the magneto-optical disk having information recorded with high density.
摘要翻译：磁光盘具有通过磁场调制方法形成记录位的记录层和容易磁化的轴在室温下与记录层平行的读出层，并且在其内变化为垂直于记录层室温和居里温度之间的预定温度范围。在再现记录位期间，第一半导体激光器发出加热用光束，以在读出层上形成第一光点。因此，对应于预定温度范围的环形区域呈现垂直的磁各向异性，并且记录的位被复制从记录层到环形区域。当第一个光点移动时，作为记录位的读出窗口的环形区域也被移位。此外，第二半导体激光器发射再现用光束，使得第二光点形成在读出层上，以在其后部与第一光点重叠。因此，只能再现复制到环形区域后部的一个记录位; 因此，可以从具有以高密度记录的信息的磁光盘获得高质量的再现信号。

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