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。

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。

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。

公开(公告)号：US5546364A

公开(公告)日：1996-08-13

申请号：US311452

申请日：1994-09-26

申请人： Hiroshi Fuji ,  Toshihisa Deguchi ,  Kunio Kojima ,  Takeshi Yamaguchi ,  Shigeo Terashima ,  Akira Takahashi ,  Kenji Ohta

发明人： Hiroshi Fuji ,  Toshihisa Deguchi ,  Kunio Kojima ,  Takeshi Yamaguchi ,  Shigeo Terashima ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/013 ,  G11B11/105 ,  G11B13/04 ,  G11B7/12 ,  G11B11/12

CPC分类号： G11B7/24085 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10528 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/013

摘要： A magneto-optical memory apparatus for enhancing the recording density of a magneto-optical recording medium, thereby to increase its recording capacity. The magneto-optical recording medium having recording marks, each having two ends in which information is recorded. The apparatus also includes an optical head arranged such that at the time of recording onto the magneto-optical recording medium, the recording marks are recorded such that the ends of each recording mark correspond to a second code of digital information composed of two different types of codes; at the time of reproduction, a light beam having a condensing spot is projected to the magneto-optical recording medium and, when a reproduction light containing reproduction information is entered to the optical head from the magneto-optical recording medium, a reproduction signal is supplied; and when the light beam is projected to a recording mark, an information pulse corresponding to the second code is generated in the reproduction signal, only when the reproduction light from the recording mark interferes with the reproduction light from the non-marking part; and a signal detector circuit for detecting the information pulse in the reproduction signal obtained from the optical head and for converting the reproduction signal into a digital reproduction signal.

摘要翻译： 一种用于增强磁光记录介质的记录密度的磁光存储装置，从而提高其记录容量。 具有记录标记的磁光记录介质，每个记录标记具有记录信息的两端。 该装置还包括一个光学头，其被配置为使得在记录到磁光记录介质上时，记录标记被记录为使得每个记录标记的端部对应于由两种不同类型的 代码; 在再现时，将具有聚光点的光束投影到磁光记录介质，并且当从磁光记录介质将包含再现信息的再现光输入到光头时，提供再现信号 ; 并且当光束投射到记录标记时，只有当来自记录标记的再现光干扰来自非标记部分的再现光时，才在再现信号中产生与第二代码相对应的信息脉冲; 以及信号检测器电路，用于检测从光头获得的再现信号中的信息脉冲，并将再现信号转换成数字再现信号。

公开(公告)号：US4925776A

公开(公告)日：1990-05-15

申请号：US229753

申请日：1988-08-08

申请人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

发明人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

IPC分类号： G11B7/26

CPC分类号： G11B7/261 ,  Y10S430/136 ,  Y10S430/146

摘要： A method for manufacturing an optical memory element including the steps of disposing a resist film on a substrate, placing a photo-mask carrying a guide groove pattern on the resist film so as to position the photo-mask over a predetermined position of the substrate, forming a guide groove pattern latent image on the resist film, developing the guide groove pattern latent image formed on the resist film, conducting an etching operation through the developed guide groove pattern as to form guide grooves in the substrate, removing the resist film from the substrate, and disposing a recording medium layer on the substrate having the guide grooves formed therein.

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。

公开(公告)号：US4677601A

公开(公告)日：1987-06-30

申请号：US585179

申请日：1984-03-01

申请人： Kenji Ohta ,  Toshihisa Deguchi ,  Akira Takahashi

发明人： Kenji Ohta ,  Toshihisa Deguchi ,  Akira Takahashi

IPC分类号： G03G5/16 ,  G11B7/09 ,  G11B11/10 ,  G11B11/105 ,  H01F10/13 ,  G11B7/007

CPC分类号： G03G5/16 ,  G11B11/10 ,  G11B11/10582 ,  G11B11/10591 ,  G11B7/0938 ,  H01F10/136 ,  Y10S428/90

摘要： Disclosed is a new magnetic storage medium including a layer of amorphous material typically GdDyFe whose Curie recording point (e.g., 120.degree. C.) is lower than its crystallization point (e.g., 350.degree. C.) to enable crystallization to cause variations in its optical properties such as transmittance or reflectivity for thermomagnetic writing. Reversible recordings are set up on the amorphous material layer by a thermomagnetic writing technique, for example Curie point writing, while unchangeable or permanent recordings are set up on the amorphous material layer through laser-activated crystallization of the amorphous material layer.

摘要翻译： 公开了一种新的磁存储介质，其包括通常具有居里记录点（例如，120℃）低于其结晶点（例如，350℃）的GdDyFe的非晶材料层，以使结晶能够引起其光学变化 热磁写入的透光率或反射率等特性。 通过热磁写入技术（例如居里点写入）在非晶材料层上设置可逆记录，而通过非晶材料层的激光激活结晶，在非晶材料层上建立不变的或永久的记录。

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。

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。

公开(公告)号：US5470694A

公开(公告)日：1995-11-28

申请号：US74272

申请日：1993-06-10

申请人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

发明人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

IPC分类号： G11B7/26 ,  G03C5/16

CPC分类号： G11B7/261 ,  Y10S430/136 ,  Y10S430/146

摘要： A method for manufacturing an optical memory element including the steps of disposing a resist film on a substrate, placing a photo-mask carrying a guide groove pattern on the resist film so as to position the photo-mask over a predetermined position of the substrate, forming a guide groove pattern latent image on the resist film, developing the guide groove pattern latent image formed on the resist film, conducting an etching operation through the developed guide groove pattern as to form guide grooves in the substrate, removing the resist film from the substrate, and disposing a recording medium layer on the substrate having the guide grooves formed therein.

摘要翻译： 一种用于制造光学存储元件的方法，包括以下步骤：在衬底上设置抗蚀剂膜，将在所述抗蚀剂膜上携带引导槽图案的光掩模放置在所述衬底的预定位置上， 在抗蚀剂膜上形成引导槽图案潜像，使形成在抗蚀剂膜上的引导槽图案潜像显影，通过显影导槽图案进行蚀刻操作，以在基板上形成引导槽， 并且在其上形成有引导槽的基板上设置记录介质层。