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1. 发明授权

US06463015B1 Method of reproducing information on a magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information 有权
标题翻译：在用于实现高分辨率记录信息的超分辨率再现的磁光记录介质上再现信息的方法
公开(公告)号：US06463015B1
公开(公告)日：2002-10-08
申请号：US09633914
申请日：2000-08-08
申请人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
发明人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
IPC分类号： G11B724
CPC分类号： G11B11/10515 , G11B11/10584 , G11B11/10586
摘要： A magneto-optical recording medium of the present invention has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in temperature. When the magneto-optical recording medium is irradiated with a light beam, the readout layer separates into three regions: a region in an in-plane magnetization state, a region in a perpendicular magnetization state, and a region having a temperature not lower than the Curie temperature thereof. Only the region in the perpendicular magnetization state allows copying of the magnetization of the recording layer. Therefore, even when the diameter and intervals of recording bits on the recording layer are very small, it is possible to reproduce a target recording bit separately from a recording bit adjacent to the target recording bit.
摘要翻译：本发明的磁光记录介质具有由垂直磁化膜构成的记录层和在室温下处于面内磁化状态的读出层，随温度升高而变为垂直磁化状态。当磁光记录介质被光束照射时，读出层分为三个区域：面内磁化状态的区域，垂直磁化状态的区域和温度不低于居里温度。只有垂直磁化状态的区域才允许复制记录层的磁化。因此，即使当记录层上的记录位的直径和间隔非常小时，也可以与目标记录位相邻的记录位分开再现目标记录位。

2. 发明授权

US4985885A Optical memory device 失效
标题翻译：光存储设备
公开(公告)号：US4985885A
公开(公告)日：1991-01-15
申请号：US213817
申请日：1988-06-30
申请人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirokane , Yoshiteru Murakami
发明人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirokane , Yoshiteru Murakami
IPC分类号： G11B11/105 , G11B19/12 , G11B19/20
CPC分类号： G11B19/12 , G11B11/10584 , G11B11/10586 , G11B19/20
摘要： An optical memory device comprising a first light-permeable substrate, a second light-permeable substrate and a plurality of strip-shaped optical recording layers that are disposed with a gap between the first substrate and the second substrate, wherein the optical path length from the outer surface of the first substrate to the recording layers is approximately equal to the optical path length from the outer surface of the second surface to the recording layers.

3. 发明授权

US4818648A Optical memory element 失效
标题翻译：光学存储元件
公开(公告)号：US4818648A
公开(公告)日：1989-04-04
申请号：US934718
申请日：1986-11-25
申请人： Kenji Ohta , Akira Takahashi , Tetsuya Inui , Hiroyuki Katayama , Junji Hirokane , Yoshiteru Murakami
发明人： Kenji Ohta , Akira Takahashi , Tetsuya Inui , Hiroyuki Katayama , Junji Hirokane , Yoshiteru Murakami
IPC分类号： G11B11/10 , C03C3/076 , C03C3/083 , C03C3/091 , C03C4/00 , C03C15/00 , G11B7/24 , G11B7/253 , G11B7/26 , G11B11/105 , G03C5/16 , G01D9/00 , G11B3/70
CPC分类号： G11B7/24 , C03C3/076 , C03C3/083 , C03C3/091 , G11B7/2531 , G11B7/261 , G11B2007/24304 , G11B7/2533 , Y10T428/24479 , Y10T428/2457
摘要： An optical memory element comprising a substrate with grooves functioning as grooves for, for example, controlling the position of a laser beam, wherein said substrate is composed of a glass containing SiO.sub.2 in the range of 51 to 71% by weight, Na.sub.2 O in the range of 10 to 18% by weight, K.sub.2 O in the range of 0 to 8% by weight, Al.sub.2 O.sub.3 in the range of 12 to 22% by weight, and B.sub.2 O.sub.3 in the range of 0 to 9% by weight.
摘要翻译：一种光学存储元件，包括具有用作例如控制激光束位置的凹槽的衬底，其中所述衬底由含有51至71重量％的SiO 2的玻璃组成，在该范围内的Na 2 O在该范围内为10〜18重量％，K 2 O为0〜8重量％，Al 2 O 3为12〜22重量％，B 2 O 3为0〜9重量％。

4. 发明授权

US06665235B2 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：磁光记录介质以及用于磁光记录介质的记录和再现方法和光头
公开(公告)号：US06665235B2
公开(公告)日：2003-12-16
申请号：US10214881
申请日：2002-08-08
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： G11B1100
CPC分类号： G11B11/10586 , B60T1/005 , F16D63/00 , G11B7/00718 , G11B7/126 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10595
摘要： Featured is a recording and reproducing method of a magneto-optical recording medium including a recording layer for recording thereon information magneto-optically and a readout layer which has in-plane magnetization at room temperature and where a transition occurs from in-plane magnetization to perpendicular magnetization as temperature raises. The method includes projecting a light beam onto such a magneto-optical recording medium so as to form a perpendicularly magnetized area in the readout layer by duplication of the magnetization of said recording layer to the area. In further embodiments, the recording medium further includes an intermediate layer made of non-magnetic film formed between the readout and recording layers and the readout and recording layers are composed of rare-earth transition metal alloys such as TbFeCo (recoding layer) readout layer, made of GdFeCo (readout layer).
摘要翻译：特别是磁光记录介质的记录和再现方法，其包括用于在其上记录磁光信息的记录层和在室温下具有面内磁化的读出层，并且其中从面内磁化转变为垂直磁化随温度升高。该方法包括将光束投影到这种磁光记录介质上，以便通过将所述记录层的磁化复制到该区域而在读出层中形成垂直磁化区域。在另外的实施例中，记录介质还包括由读出和记录层之间形成的非磁性膜制成的中间层，并且读出和记录层由稀土过渡金属合金如TbFeCo（记录层）读出层，由GdFeCo（读出层）制成。

5. 发明授权

US06483785B1 Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens 失效
标题翻译：使用光束直径与会聚透镜孔径的磁光记录方法
公开(公告)号：US06483785B1
公开(公告)日：2002-11-19
申请号：US09685829
申请日：2000-10-10
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： G11B1100
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： Featured is a recording and reproducing method for recording and reproducing information on and from a recording medium. The medium includes a base having a property that a light can be transmitted therethrough, a readout layer formed on the base, which has an in-plane magnetization at room temperature, whereas, a transition occurs from in-plane magnetization to perpendicular magnetization as temperature rises and a recording layer formed on said readout layer for recording thereon information magneto-optically. A groove for guiding a light beam is formed on a readout layer side of the base and a groove width is set substantially equal to a land width formed between grooves. The recording layer on the grooves and the recording layer on lands are used in recording and reproducing information. Further a light beam is incident on a converging lens of an optical head, the light beam having a larger diameter &ohgr; than an aperture &agr; of the converging lens for converging the light beam on a predetermined position of the magneto-optical recording medium.
摘要翻译：特色是用于在记录介质上记录和再现信息的记录和再现方法。该介质包括具有光可以透射的性质的基底，形成在基底上的读出层，其在室温下具有面内磁化强度，而从平面内磁化转变为垂直磁化转变为温度并且在所述读出层上形成用于在其上记录光学信息的记录层。在基板的读出层侧形成用于引导光束的槽，并且将槽宽度设定为与槽之间形成的焊盘宽度大致相等。凹槽上的记录层和焊盘上的记录层用于记录和再现信息。此外，光束入射到光学头的会聚透镜上，所述光束具有比会聚透镜的孔径α更大的直径Ω，用于将光束会聚在磁光记录介质的预定位置。

6. 发明授权

US06272077B1 Magneto-optical recording medium having intermediate layer of in plane magnetization 有权
标题翻译：具有平面磁化中间层的磁光记录介质
公开(公告)号：US06272077B1
公开(公告)日：2001-08-07
申请号：US09479256
申请日：2000-01-07
申请人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
发明人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
IPC分类号： G11B1110
CPC分类号： G11B11/10584 , G11B11/10515 , G11B11/10586 , G11B11/10593
摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
摘要翻译：根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述预定温度。在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被屏蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴中再现层。因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

7. 发明授权

US06147939A Magneto-optical recording medium having intermediate layer of in-plane magnetization 失效
标题翻译：具有平面内磁化中间层的磁光记录介质
公开(公告)号：US06147939A
公开(公告)日：2000-11-14
申请号：US32985
申请日：1998-03-02
申请人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
发明人： Akira Takahashi , Michinobu Mieda , Naoyasu Iketani , Go Mori , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
IPC分类号： G11B11/105 , G11B11/00
CPC分类号： G11B11/10584 , G11B11/10515 , G11B11/10586 , G11B11/10593
摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
摘要翻译：根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述预定温度。在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被屏蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴中再现层。因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

8. 发明授权

US6143436A Magnetic recording medium and information recording-reproduction method using the same 失效
标题翻译：磁记录介质和使用该磁记录介质的信息记录再现方法
公开(公告)号：US6143436A
公开(公告)日：2000-11-07
申请号：US909194
申请日：1997-08-11
申请人： Junsaku Nakajima , Akira Takahashi , Junji Hirokane , Yoshiteru Murakami , Kenji Ohta
发明人： Junsaku Nakajima , Akira Takahashi , Junji Hirokane , Yoshiteru Murakami , Kenji Ohta
IPC分类号： G11B11/10 , G03G5/16 , G11B5/00 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/74 , G11B11/105 , G11B13/04 , G11B19/02
CPC分类号： G03G5/16 , G11B11/10589 , G11B13/045 , G11B5/00 , G11B5/656 , G11B11/10504 , G11B11/10515 , G11B11/10532 , G11B19/02 , G11B2005/0002 , G11B2005/0021 , G11B5/74 , Y10S428/90
摘要： A magnetic recording medium having a recording layer made up of a ferrimagnetic material whose compensation temperature is included within room temperatures and an information recording-reproduction method using the magnetic recording medium. During recording, while a light beam is projected on the recording layer so as to raise the temperature of a recording portion, information is recorded by applying a signal magnetic field from a magnetic head. During reproduction, while a light beam is projected on a reproducing portion of the recording layer so as to raise the temperature thereof, information is reproduced by detecting leakage flux from the reproducing portion by the magnetic head. Thus, during reproduction, no magnetic flux is generated from other portions of the recording layer not irradiated by the light beam. With the arrangement, crosstalk due to leakage flux from adjoining tracks not irradiated by the optical beam can be eliminated. Therefore, track pitches can be made narrower so as to increase recording density of the magnetic recording medium. Further, since crosstalk from adjoining tracks is eliminated, a high S/N can be achieved.
摘要翻译：一种磁记录介质，其具有由补偿温度包括在室温内的铁氧体材料制成的记录层和使用该磁记录介质的信息记录再现方法。在记录期间，当光束投射在记录层上以提高记录部分的温度时，通过施加来自磁头的信号磁场来记录信息。在再现期间，当光束投射在记录层的再现部分上以升高其温度时，通过由磁头检测来自再现部分的漏磁通来再现信息。因此，在再现期间，不会由不被光束照射的记录层的其它部分产生磁通量。利用该布置，可以消除由于未被光束照射的相邻轨道的漏磁通引起的串扰。因此，可以使轨道间距更窄，以提高磁记录介质的记录密度。此外，由于消除了来自相邻轨道的串扰，可以实现高S / N。

9. 发明授权

US5293359A Magnetic recording and reproducing apparatus having a ferrimagnetic recording medium, a magnetic head and first and second light sources 失效
标题翻译：具有铁磁记录介质，磁头和第一和第二光源的磁记录和重放装置
公开(公告)号：US5293359A
公开(公告)日：1994-03-08
申请号：US741932
申请日：1991-08-08
申请人： Kenji Ohta , Akira Takahashi , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
发明人： Kenji Ohta , Akira Takahashi , Junsaku Nakajima , Yoshiteru Murakami , Junji Hirokane
IPC分类号： G11B5/02 , G11B5/00 , G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B5/00 , G11B2005/0021
摘要： A magnetic recording and reproducing apparatus using a recording medium made of a ferrimagnetic material, comprises a magnetic head for magnetically recording information on a recording area of a selected information recording track on a recording medium having a plurality of tracks and for magnetically reproducing the information from the recording medium, the magnetic head has a width larger than that of the width of the selected information recording track of the recording medium. For recording, light beams are radiated from a first light source on the recording area of the selected information recording track upon which recording is to be performed tracks to raise the temperature of the irradiated area to approximately a Curie temperature so as to allow recording only on that area. For reproduction, light beams are radiated from another light source onto areas on both sides of on a second area of the recording medium, located on both sides of the selected information recording track, to raise the temperature of the second irradiated areas to approximately a magnetic compensation temperature so as to allow reproduction only from the desired track, thus preventing crosstalk from the side tracks.
摘要翻译：使用由铁氧体材料制成的记录介质的磁记录和再现装置包括磁头，用于在具有多个轨道的记录介质上将所选择的信息记录轨道的记录区域上的信息磁记录，并用于从记录介质中，磁头的宽度大于记录介质的选定信息记录道的宽度。为了进行记录，光束从要进行记录的所选择的信息记录轨道的记录区域上的第一光源辐射，以将照射区域的温度升高到大约居里温度，以便仅在那个地区。为了再现，将光束从另一光源辐射到位于所选择的信息记录轨道的两侧的记录介质的第二区域的两侧的区域上，以将第二照射区域的温度升高到大约磁补偿温度，以便仅允许从期望的轨道进行再现，从而防止来自侧轨的串扰。

10. 发明授权

US4917751A Method of producing double sided optical memory disks 失效
标题翻译：双面光存储盘的制造方法
公开(公告)号：US4917751A
公开(公告)日：1990-04-17
申请号：US328743
申请日：1989-03-20
申请人： Kenji Ohta , Hiroyuki Katayama , Akira Takahashi , Yoshiteru Murakami , Junji Hirokane
发明人： Kenji Ohta , Hiroyuki Katayama , Akira Takahashi , Yoshiteru Murakami , Junji Hirokane
IPC分类号： B29C35/08 , B29C70/08 , G11B7/26 , G11B11/105
CPC分类号： G11B7/26 , B29C35/08 , B29C70/086 , B29C2035/0827 , B29L2017/005 , G11B11/10584 , Y10T156/1097 , Y10T156/1098
摘要： Double sided optical memory disks are produced by dropping a viscous adhesive material hardenable by ultraviolet radiation at predetermined longitudinal intervals onto an elongated cloth material of uniform thickness thereby causing the adhesive material to become absorbed by and contained in the cloth material, thereafter placing this cloth material sandwichedly between two optical disk pieces each containing a recording layer, thereafter applying pressure between these pieces such that the sandwiching pieces remain separated uniformly by a predetermined separation distance, and thereafter applying ultraviolet radiation to and thereby hardening the adhesive material while the disk pieces are maintained at the uniform separation distance.
摘要翻译：双面光学记忆盘是通过将能够以预定的纵向间隔使紫外线辐射固化的粘性粘合剂材料滴落到均匀厚度的细长布料上制成的，从而使粘合剂材料被布料吸收并包含在布料中，然后将该布料夹在两个光盘片之间，每个光盘片均包含记录层，然后在这些片之间施加压力，使得夹持片保持均匀分离预定的间隔距离，然后在保持盘片的同时施加紫外线辐射，从而硬化粘合剂材料在均匀分离距离。

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