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51. 发明授权

US5193082A Optical/magnetic composite head having magnetic and optical heads in one integrated unit 失效
标题翻译：在一个集成单元中具有磁性和光学头的光学/磁性复合头
公开(公告)号：US5193082A
公开(公告)日：1993-03-09
申请号：US502104
申请日：1990-03-29
申请人： Tomoyuki Miyake , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Tomoyuki Miyake , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B5/02 , G11B5/127 , G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B7/1353 , G11B11/10532 , G11B11/10536 , G11B11/10554 , G11B7/124 , G11B11/1058 , G11B2007/13722
摘要： A photomagnetic composite head comprising a magnetic head and an optical head that are integrated into one unit, an optical waveguide path of the optical head being located in the surface of the magnetic head that faces a recording medium, and a laser beam that passes through the optical waveguide path being irradiated on a point on the recording medium where a magnetic field is impressed from the magnetic head, whereby recording can be performed under a condition in which the coercivity of the recording medium has been lowered by the laser beam, thus making it possible to achieve high density recording by using a recording medium with a high coercivity.

52. 发明授权

US5053611A Device for reducing mechanical vibrations when utilizing a magneto-optical card as a recording medium 失效
标题翻译：使用磁光卡作为记录介质时减少机械振动的装置
公开(公告)号：US5053611A
公开(公告)日：1991-10-01
申请号：US287053
申请日：1988-12-21
申请人： Akira Takahashi , Yoshiteru Murakami , Junichiro Nakayama , Kenji Ohta , Hiroyuki Katayama , Michinobu Mieda
发明人： Akira Takahashi , Yoshiteru Murakami , Junichiro Nakayama , Kenji Ohta , Hiroyuki Katayama , Michinobu Mieda
IPC分类号： G11B11/10 , G11B7/0033 , G11B11/105 , G11B17/34
CPC分类号： G11B11/10565 , G11B11/10556 , G11B11/1056 , G11B11/10563 , G11B17/34 , G11B7/0033
摘要： A recording and reproducing device for a magneto-optical card includes an optical head for irradiating a magneto-optical recording medium of a magneto-optical card placed into the device with a laser beam. A magnetic field generator applies a biased magnetic field to the magneto-optical recording medium, and an optical system manipulating mechanism for the optical system of the above-mentioned optical head varies the spot irradiated by the laser beam. The optical head is fixed to the main frame of the device. The magneto-optical card is also supported where it is irradiated by the laser beam emitted from the optical head. The magneto-optical card is moved in a plane parallel to the surface of the magneto-optical card for rough searching and then a part of or the whole magnetic field generator is moved to come into contact with the magneto-optical card to stop the vibration of the magneto-optical card. The spot to be irradiated by the laser beam is then varied by means of the optical system of the optical head.

53. 发明授权

US4719137A Magneto-optic memory element 失效
标题翻译：磁光存储元件
公开(公告)号：US4719137A
公开(公告)日：1988-01-12
申请号：US721707
申请日：1985-04-10
申请人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirogane , Yoshiteru Murakami
发明人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirogane , Yoshiteru Murakami
IPC分类号： G11B11/105 , G11B7/24
CPC分类号： G11B11/10586 , G11B11/10593 , Y10S428/90 , Y10S430/146 , Y10T428/22 , Y10T428/31678
摘要： A magneto-optic memory element includes a GdTbFe recording layer sandwiched between a pair of transparent AlN dielectric layers. At least one of the pair of transparent AlN dielectric layers is extended to have a size larger than the GdTbFe recording layer so as to cover the peripheral edge of the GdTbFe recording layer, thereby protecting the GdTbFe recording layer from oxygen and moisture. An Al-Ni alloy reflection film is formed on one of the pair of transparent AlN dielectric layers in order to increase the apparent Kerr rotation angle produced by the magneto-optic memory element.

54. 发明授权

US5674583A Optical recording medium and manufacturing method thereof 失效
标题翻译：光记录介质及其制造方法
公开(公告)号：US5674583A
公开(公告)日：1997-10-07
申请号：US461164
申请日：1995-06-05
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 , G11B5/66
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, which layer to form guiding grooves is made up of ultraviolet-hardening resin, photo-resist, or a photochromic material.
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; 反映投影到记录层上的光的光反射性的磁性层也可以在其上进行磁记录或磁光记录，从而显着地增加了光带的存储容量。此外，光带设置有层以形成用于跟踪控制的引导槽，其中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。

55. 发明授权

US5662988A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5662988A
公开(公告)日：1997-09-02
申请号：US387294
申请日：1995-02-10
申请人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Yoshiteru Murakami
发明人： Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Yoshiteru Murakami
IPC分类号： G11B11/105 , G11B11/10 , G11B13/04
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10515 , Y10S428/90 , Y10S430/146 , Y10T428/12632 , Y10T428/12861 , Y10T428/12986 , Y10T428/24942 , Y10T428/31678
摘要： The magneto-optical recording medium is provided with a readout layer which shows the in-plane magnetization and which changes from the in-plane magnetization to the vertical magnetization when its temperature rises higher than a predetermined temperature by irradiation of the light beam, a memory layer which records information thereon magneto-optically, an intermediate layer which keeps in-plane magnetization from room temperatures to its Curie temperature, and an writing layer which has a Curie temperature higher than that of the memory layer and has coercive force lower than that of the memory layer. Since the intermediate layer becomes a domain wall in optical modulation recording, it prevents the memory layer and the writing layer from forming a domain wall, so information can be recorded in good condition. Moreover, a portion of the readout layer besides a center portion of the light beam shows the in-plane magnetization and masks the memory layer at playback. Therefore, a recording bit can be made small and recording density can be improved without increasing interference of signals from neighboring recording bits, which causes noises.
摘要翻译：磁光记录介质设置有读出层，该读出层显示平面内的磁化强度，并且当读出层的温度通过照射光束而升高到高于预定温度时，其从平面内磁化强度变化到垂直磁化强度;存储器在磁光上记录信息的层，将室内的平面磁化保持到其居里温度的中间层，以及具有比存储层的居里温度高的居里温度并具有低于存储层的矫顽力的矫顽力的写层内存层。由于中间层成为光调制记录中的畴壁，因此防止存储层和写入层形成畴壁，因此可以将信息记录在良好状态。此外，除了光束的中心部分之外，读出层的一部分表示平面内磁化，并且在重放时掩蔽存储层。因此，可以使记录位小，并且可以提高记录密度，而不会增加来自相邻记录位的信号的干扰，这导致噪声。

56. 发明授权

US5637394A Magneto-optical recording medium and method of reproducing magneto-optical information using thereof 失效
标题翻译：磁光记录介质及其再现磁光信息的方法
公开(公告)号：US5637394A
公开(公告)日：1997-06-10
申请号：US356857
申请日：1994-12-15
申请人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
发明人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10584 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium comprising a readout layer and a recording layer has a relationship that an external magnetic field H1 is smaller than an external magnetic field H4, where the H1 is a minimum external magnetic field necessary to make a magnetization direction of the readout layer direct to the direction reverse to a magnetization direction of the recording layer substantially at the room temperature, and the H4 is a maximum external magnetic field necessary to make the magnetization direction of the readout layer direct to the direction same as the magnetization direction of the recording layer at an high temperature not lower than a predetermined temperature. Moreover, the magneto-optical disk is provided, between the readout layer and the recording layer, with an intermediate layer which inhibits an effective bias magnetic field from the recording layer to the readout layer at the room temperature. Since it is possible to reproduce only the information in the high-temperature area close to the center of the laser beam irradiated during reproducing, recording density is improved. Furthermore, since an initializing magnetic field at reproducing is not necessary and the reproducing magnetic field can be made smaller, the apparatus can be made smaller and the electric power consumption can be decreased.
摘要翻译：包括读出层和记录层的磁光记录介质具有外部磁场H1小于外部磁场H4的关系，其中H1是使读出磁化方向发生所需的最小外部磁场层直接与基本上在室温下的记录层的磁化方向相反的方向，并且H4是使读出层的磁化方向直到与磁化方向相同的方向所需的最大外部磁场记录层在不低于预定温度的高温下进行。此外，在读出层和记录层之间设置磁光盘，其中间层在室温下抑制从记录层到读出层的有效偏置磁场。由于只能再现靠近在再现期间照射的激光束的中心的高温区域的信息，所以记录密度提高。此外，由于不需要再现时的初始化磁场并且可以使再现磁场更小，所以可以使装置更小，并且可以降低电力消耗。

57. 发明授权

US5414652A Magneto-optical memory element 失效
标题翻译：磁光存储元件
公开(公告)号：US5414652A
公开(公告)日：1995-05-09
申请号：US293720
申请日：1994-08-22
申请人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B7/007 , G11B11/105 , G11C13/06
CPC分类号： G11B7/24079 , G11B11/10584 , G11B7/00718
摘要： A magneto-optical memory element including: grooves, formed on at least one surface of a transparent substrate, for guiding a light beam; a magneto-optical recording layer formed on the surface of said transparent substrate on which the grooves are formed, wherein a width of each groove and a width of each land formed between the grooves are substantially equal, information is recorded on and reproduced from tracks on the grooves and the lands, and a groove depth d (track depth) is arranged such that 0.13.times..lambda./n.ltoreq.d.ltoreq. 0.18.times. .lambda./n, where .lambda. is a wavelength of the light beam and n is a refraction index of the transparent substrate. Assuming that a diameter of the light beam at a portion where a light intensity of the light beam becomes 1/e.sup.2 of a light intensity of the center of the light beam is L, a track pitch p is arranged such that 0.6.ltoreq.L/p.ltoreq.1.2. Therefore, even when the track density is increased, i.e., the width of the groove portion and the width of the land portion are reduced, a satisfactory signal quality with low level of crosstalk is obtained. Accordingly, such a magneto-optical disk achieves a high recording density.
摘要翻译：一种磁光存储元件，包括：形成在透明基板的至少一个表面上的用于引导光束的凹槽; 形成在所述透明基板的形成有凹槽的表面上的磁光记录层，其中每个凹槽的宽度和在凹槽之间形成的每个焊盘的宽度基本上相等，信息被记录在磁道上并从其上再现凹槽和焊盘以及凹槽深度d（磁道深度）被布置成使得0.13xλ/n≤d≤0.18xλ/ n，其中λ是光束的波长，n是透明基板的折射率。假设在光束的光强度变为光束中心的光强度的1 / e2的部分处的光束的直径为L，则轨道间距p被布置成使得0.6≤L /p

58. 发明授权

US5353278A Magneto-optical disk and method of manufacturing the same 失效
标题翻译：磁光盘及其制造方法
公开(公告)号：US5353278A
公开(公告)日：1994-10-04
申请号：US694990
申请日：1991-05-02
申请人： Yoshiteru Murakami , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Hirotaka Toki
发明人： Yoshiteru Murakami , Junichiro Nakayama , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta , Hirotaka Toki
IPC分类号： G11B11/105 , G11B23/00 , G11B5/54
CPC分类号： G11B23/0042 , G11B11/10582 , G11B11/10584
摘要： A magneto-optical disk comprising a substrate whereon a recording medium is formed, and a depression is formed on the substrate on the inside of the recording medium of the substrate. A center hub is installed on the depression such that the center hub is substantially level with a protective resin layer covering the recording medium. On the center hub, a flying head performs CSS (Contact Start and Stop). This configuration of the disk eliminates the occurrence of dust due to the abrasion and head crash, and achieves stable CSS. A method of manufacturing the magneto-optical disk, wherein the protective resin layer is formed after installing the center hub on the depression. In this method, since a space is not produced between the center hub and the protective resin layer, the stable flying characteristics is obtained. And a magneto-optical disk whereon small physical bumps and pits are formed on the substrate on the inside of the recording medium, which prevents the flying head from sticking to the disk. A method of manufacturing the magneto-optical disk by using a stamper, which permits the disk to be mass produced.
摘要翻译：一种磁光盘，包括形成记录介质的基板，并且在基板的记录介质的内侧上的基板上形成凹陷。中心毂安装在凹陷处，使得中心毂基本上与覆盖记录介质的保护树脂层水平。在中心枢纽上，飞头执行CSS（联系人启动和停止）。盘的这种配置消除了由于磨损和头部碰撞引起的灰尘的发生，并且实现了稳定的CSS。一种制造磁光盘的方法，其中在将中心毂安装在凹陷部之后形成保护树脂层。在该方法中，由于在中心轮毂和保护树脂层之间不产生空间，因此获得了稳定的飞行特性。另外，在记录介质的内侧的基板上形成小的物理凸点和凹坑的磁光盘，防止飞头粘附到盘上。通过使用压模来制造磁光盘的方法，该压模允许大量生产盘。

59. 发明授权

US5081614A Magneto-optical head utilizing central and peripheral portions of reflected light flux for different purposes 失效
标题翻译：用于不同目的的反射光通量的中心和外围部分的磁光头
公开(公告)号：US5081614A
公开(公告)日：1992-01-14
申请号：US577817
申请日：1990-09-04
申请人： Akira Takahashi , Toshihisa DeGuchi , Yoshiteru Murakami , Michinobu Mieda , Kazuo Van , Kenji Ohta , Hiroyuki Katayama , Tomoyuki Miyake
发明人： Akira Takahashi , Toshihisa DeGuchi , Yoshiteru Murakami , Michinobu Mieda , Kazuo Van , Kenji Ohta , Hiroyuki Katayama , Tomoyuki Miyake
IPC分类号： G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B11/10532 , G11B7/12 , G11B7/1381
摘要： A magneto-optical head wherein a light flux, which is reflected from a recording medium, is separated into its central portion and remaining portion. The central light flux portion is only used as a magneto-optical signal while the remaining light flux portion is only used as an optical servo signal.
摘要翻译：一种磁光头，其中从记录介质反射的光束被分离成其中心部分和剩余部分。中央光束部分仅用作磁光信号，而剩余光通量部分仅用作光伺服信号。

60. 发明授权

US4740947A Dual surface optical memory disc 失效
标题翻译：双面光学记忆盘
公开(公告)号：US4740947A
公开(公告)日：1988-04-26
申请号：US61034
申请日：1987-06-12
申请人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirogane , Yoshiteru Murakami
发明人： Kenji Ohta , Akira Takahashi , Hiroyuki Katayama , Junji Hirogane , Yoshiteru Murakami
IPC分类号： B29C65/48 , G11B7/24 , G11B11/105
CPC分类号： G11B11/10586 , B29C65/1406 , B29C65/4845 , B29C65/4875 , B29C66/452 , B29C66/73366 , G11B7/24015 , G11B7/24024 , B29C65/4885 , B29C65/7826 , B29C66/8322 , B29L2017/005
摘要： A first optical memory disc and a second optical memory disc are fixed to each other by an adhesive layer so as to form a dual-surface optical memory disc. In a manufacturing step, an adhesive, preferably pre-cured photo-polymer mixed with spherical spacer elements, is painted on either one of or both of the first and second optical memory discs. When a predetermined pressure is applied between the two optical memory discs, the thickness of the adhesive layer is fixed by the diameter of the spherical spacer elements. While the pressure is applied between the two optical memory discs, ultraviolet rays are applied to the adhesive layer through one of the first or second optical memory discs so as to cure the photo-polymer, thereby tightly joining the first and second optical memory discs to each other.
摘要翻译：第一光存储盘和第二光存储盘通过粘合剂层彼此固定，以形成双表面光存储盘。在制造步骤中，将粘合剂，优选与球形间隔元件混合的预固化光聚合物涂覆在第一和第二光学存储盘的一个或两个上。当在两个光学存储盘之间施加预定的压力时，粘合剂层的厚度由球形间隔元件的直径固定。当在两个光学存储盘之间施加压力时，通过第一或第二光学存储盘中的一个将紫外线施加到粘合剂层，以便固化光聚合物，从而将第一和第二光学存储盘紧密连接到彼此。

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