公开(公告)号：US5095350A

公开(公告)日：1992-03-10

申请号：US505476

申请日：1990-04-06

申请人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Tomokazu Ise ,  Tomoyuki Miyake ,  Junichiro Nakayama

发明人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Tomokazu Ise ,  Tomoyuki Miyake ,  Junichiro Nakayama

IPC分类号： G11B11/10 ,  G11B11/105 ,  H01F10/08

CPC分类号： G11B11/10586 ,  Y10S428/928 ,  Y10T428/12861

摘要： A magneto-optic memory medium of an exchange-coupled ferrimagnetic double-layered structure having a recording film of a specific amorphous GdTbFe alloy and a reading film of a specific amorphous GdNdFe alloy.

摘要翻译： 具有特定无定形GdTbFe合金的记录膜和特定无定形GdNdFe合金的读取膜的交换耦合铁磁双层结构的磁光存储介质。

公开(公告)号：US5088086A

公开(公告)日：1992-02-11

申请号：US385444

申请日：1989-07-27

申请人： Kazuo Van ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Kazuo Van ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G02F1/17 ,  G03C1/73 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/24 ,  G11B7/244

CPC分类号： G11B7/253 ,  G11B7/00455 ,  G11B7/244 ,  G11B2007/24612 ,  G11B7/2467 ,  G11B7/2531 ,  G11B7/2533 ,  Y10S430/146

摘要： The invention provides an optical recording medium and a method of recording, reading, and erasing information to an optical recording medium, where information is recorded, read, and erased to the recording medium by applying beams projected from a light source capable of varying wavelength of beams. The recording medium contains at least two kinds of organic compounds each presenting photochromic phenomenon and being dispersed in binder. By projecting beams onto the optical recording medium, recording, reading, and erasure of information making use of a photochromic phenomenon can be executed independently against each organic compound dispersed in the recording medium. As a result, the optical recording medium promotes to increase the information recording density in proportion to the number of the kind of organic compounds.

公开(公告)号：US5077714A

公开(公告)日：1991-12-31

申请号：US340771

申请日：1989-04-20

申请人： Hiroyuki Katayama ,  Kenji Ohta ,  Junichiro Nakayama ,  Tomoyuki Miyake ,  Akira Takahashi

发明人： Hiroyuki Katayama ,  Kenji Ohta ,  Junichiro Nakayama ,  Tomoyuki Miyake ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105

CPC分类号： G11B11/1051 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10528

摘要： A magneto-optical recording and reproducing device for recording and reproducing data determined by negative magnetized areas in a magneto-optical recording medium. The device including a laser beam output level control means for controlling the intensity of a laser beam when recording data on the medium. The device prevents the causes of false signals and incorrect detection influenced by residual negative magnetized domains by increasing laser beam intensity when rewriting positive magnetized areas to erase residual negative magnetized areas.

公开(公告)号：US5002813A

公开(公告)日：1991-03-26

申请号：US384254

申请日：1989-07-21

申请人： Junichiro Nakayama ,  Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami

发明人： Junichiro Nakayama ,  Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami

IPC分类号： B42D15/10 ,  G06K19/06 ,  G11B7/24 ,  G11B7/26

CPC分类号： G11B7/26 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T156/10 ,  Y10T428/239 ,  Y10T428/31507

摘要： A substrate for manufacturing an optical memory device includes one surface covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, thereby allowing the protective film to function as a mask for forming the recording layers in a recording layer forming process. Also disclosed is a method of manufacturing an optical memory device including the steps of continuously feeding a substrate covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, forming the recording layers through the openings on the substrate, forming guide tracks on the substrate, stripping the protective film from the substrate, cutting the substrate to a predetermined size, and forming a protective layer on the substrate.

摘要翻译： 用于制造光学存储器件的衬底包括一个被保护膜覆盖的表面，该保护膜仅在对应于要形成在衬底上的记录层的部分中具有开口，从而允许保护膜用作掩模，用于形成记录层 记录层形成过程。 还公开了一种制造光学存储器件的方法，包括以下步骤：将覆盖有保护膜的衬底连续地供给到仅在对应于要形成在衬底上的记录层的部分上的开口，通过上述开口形成记录层 基板，在基板上形成引导轨道，从基板剥离保护膜，将基板切割成预定尺寸，以及在基板上形成保护层。

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：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。

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：US06261707B1

公开(公告)日：2001-07-17

申请号：US08147373

申请日：1993-11-03

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： G11B566

CPC分类号： G11B7/126 ,  G11B7/00718 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10517 ,  G11B11/10543 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10595 ,  Y10S428/90

摘要： A magneto-optical recording medium is composed of a base which has a property that a light can be transmitted therethrough, a readout layer formed on the base, which has in-plane magnetization at room temperature, whereas, a transition occurs from in-plane magnetization to perpendicular magnetization as the temperature thereof is raised and a recording layer formed on the readout layer for recording information magneto-optically. A recording and reproducing method and the optical head are designed for the magneto-optical recording medium. By the recording and reproducing method using the optical head, information recorded at high density can be reproduced.

摘要翻译： 磁光记录介质由具有光透射性的基底组成，形成在基底上的读出层，其在室温下具有面内磁化，而从平面内发生转变 随着其温度升高，磁化至垂直磁化，以及形成在读出层上用于磁光记录信息的记录层。 记录和再现方法和光学头被设计用于磁光记录介质。 通过使用光学头的记录和再现方法，可以再现以高密度记录的信息。

公开(公告)号：US06058100A

公开(公告)日：2000-05-02

申请号：US928042

申请日：1997-09-11

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/再现轨迹进行扫描时，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。

公开(公告)号：US5989671A

公开(公告)日：1999-11-23

申请号：US879916

申请日：1997-06-20

申请人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van

发明人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van

IPC分类号： G11B5/00 ,  G11B7/003 ,  G11B7/004 ,  G11B7/007 ,  G11B7/24 ,  G11B7/26 ,  G11B11/105 ,  G11B13/00 ,  G11B13/04 ,  G11B20/00 ,  G11B23/28 ,  G11B5/60

CPC分类号： G11B23/281 ,  G11B11/10582 ,  G11B13/00 ,  G11B13/04 ,  G11B13/045 ,  G11B23/28 ,  G11B5/00 ,  G11B7/0031 ,  G11B7/24 ,  G11B7/26 ,  G11B11/10502 ,  G11B20/00086 ,  G11B7/004 ,  G11B7/007 ,  Y10S428/90 ,  Y10T428/265

摘要： An optical tape including an optical recording layer for permitting information to be optically recorded thereon and a light-reflective magnetic layer. The light-reflective magnetic layer which reflects light projected onto the recording layer, also permits magnetic recording or magneto-optical recording to be performed thereon, thereby increasing a storage capacity of the optical tape remarkably. Further, the optical tape is provided with a layer to form guiding grooves for tracking control. The layer to form guiding grooves is made up of ultraviolet-hardening resin, photo-resist, or a photochromic material. For example, in the case of using ultraviolet-hardening resin, after a guiding groove pattern has been exposed by projecting an ultraviolet ray on a layer made up of ultraviolet-hardening resin, the exposed areas harden to form areas corresponding to guiding grooves between those exposed areas. The guiding grooves are formed by removing the areas corresponding to guiding grooves from the layer made up of the ultraviolet-hardening resin. Additionally, along with a guiding groove pattern, an index pattern can also be exposed. The guiding grooves thus formed do not reduce the recording density for information of the optical tape.

摘要翻译： 一种光学带，包括用于允许光学记录信息的光学记录层和光反射性磁性层。 反射投影到记录层上的光的光反射性磁性层也可以在其上进行磁记录或磁光记录，从而显着提高光带的存储容量。 此外，光带设置有一层以形成用于跟踪控制的引导槽。 形成导向槽的层由紫外线硬化树脂，光致抗蚀剂或光致变色材料构成。 例如，在使用紫外线硬化树脂的情况下，通过在由紫外线固化型树脂构成的层上投射紫外线而引导槽图案露出后，露出的区域变硬，形成与引导槽对应的区域 暴露地区。 通过从由紫外线固化树脂构成的层去除与导向槽相对应的区域来形成引导槽。 另外，与引导槽图案一样，还可以暴露索引图案。 如此形成的引导槽不会降低用于光带的信息的记录密度。