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71. 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.

72. 发明授权

US5490131A Optical disk 失效
标题翻译：光盘
公开(公告)号：US5490131A
公开(公告)日：1996-02-06
申请号：US731790
申请日：1991-07-18
申请人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
发明人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
IPC分类号： G11B7/24 , G11B7/243 , G11B7/253 , G11B7/2534 , G11B7/2542 , G11B7/257 , G11B7/258 , G11B7/2585 , G11B7/26 , G11B11/105 , G11B11/12
CPC分类号： G11B7/2542 , G11B11/10586 , G11B7/24 , G11B7/252 , G11B7/26 , G11B2007/24306 , G11B2007/25708 , G11B2007/25713 , G11B7/2534 , G11B7/2585
摘要： An optical disk including a transparent plastic substrate, a recording film formed on an one side surface of said substrate, a first protective film covering said recording film, and a moisture-impermeable film formed on the other side surface of said substrate via or not via an intermediate film.
摘要翻译：一种光盘，包括透明塑料基板，形成在所述基板的一个侧表面上的记录膜，覆盖所述记录膜的第一保护膜和形成在所述基板的另一侧表面上的不透湿膜，经由或不经由中间膜。

73. 发明授权

US5202860A Magneto-optic reproducing device using right and left circularly polarized light 失效
标题翻译：使用右侧和左侧圆形偏振光的磁光复制装置
公开(公告)号：US5202860A
公开(公告)日：1993-04-13
申请号：US664183
申请日：1991-03-04
申请人： Akira Takahashi , Yoshiteru Murakami , Junsaku Nakayima , Kenji Ohta
发明人： Akira Takahashi , Yoshiteru Murakami , Junsaku Nakayima , Kenji Ohta
IPC分类号： G11B11/105
CPC分类号： G11B11/10545
摘要： A reproducing optical device for a magneto-optical recording medium related to the present invention having light sources that emit linearly polarized lights towards a magneto-optical recording medium, polarization directions of the linearly polarized lights being mutually orthogonal. A quarter wavelength plate disposed between the recording medium and the light sources converts each of the linearly polarized lights into right and left circularly polarized lights respectively. Corresponding to recorded information, the recording medium has magnetized sections that are magnetized in a perpendicularly upward and downward direction with respect to a medium surface. Moreover, the recording medium displays the property of circular dichroism. When the right circularly polarized light and the left circularly polarized light are reflected off the recording medium, a first and a second photodetector generate a first and a second reproduced signal respectively, based on variation in reflected light intensity of each of the circularly polarized lights. This variation corresponds to the upward and the downward magnetization directions of the magnetized sections and is due to the circular dichroism effect. There is a phase difference of half a cycle between the first and the second reproduced signal and the signals vary inversely with respect to each other. Consequently, disk noise is cancelled by differentially amplifying the first and the second reproduced signal, and an SN ratio of a reproduced signal thereby can be improved.

74. 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。

75. 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。

76. 发明授权

US5586109A Optical memory having narrowed track pitch 失效
标题翻译：具有窄轨道间距的光学存储器
公开(公告)号：US5586109A
公开(公告)日：1996-12-17
申请号：US354457
申请日：1994-12-12
申请人： Tetsuya Inui , Akira Takahashi , Kenji Ohta , Michinobu Mieda , Yoshiteru Murakami
发明人： Tetsuya Inui , Akira Takahashi , Kenji Ohta , Michinobu Mieda , Yoshiteru Murakami
IPC分类号： G11B7/0045 , G11B7/007 , G11B7/09 , G11B7/24 , G11B7/26 , G11B11/105 , G11B3/70
CPC分类号： G11B7/261 , G11B11/10582 , G11B7/24 , G11B7/24079 , G11B7/26 , G11B7/00454 , G11B7/007 , G11B7/0938
摘要： A transparent substrate of an optical memory is produced by injection molding using a stamper. Grooves and lands are alternately arranged on the optical memory, for tracking of light converged on the optical memory. The groove width is set in the range of 0.3 .mu.m to 0.4 .mu.m and the groove depth is set in the rage of 80 nm to 100 nm. A decrease in the width of a land at each edge is restrained to 0.2 .mu.m in maximum. With such dimensions, even when the track pitch is set to about 1.4 .mu.m, it is possible to obtain a track crossing signal with intensity sufficient for performing an access operation to a target track. Moreover, since the dimensions bring about an improved reflectance at a land, the optical memory achieves an improved C/N and recording density.
摘要翻译：通过使用压模的注射成型制造光学存储器的透明基板。沟槽和焊盘交替布置在光学存储器上，用于跟踪会聚在光学存储器上的光。槽宽度设定在0.3μm〜0.4μm的范围内，槽深度设定在80nm〜100nm的范围内。每个边缘的陆地宽度减小最大限制在0.2亩。利用这样的尺寸，即使当轨道间距设置为大约1.4μm时，也可以获得具有足以对目标轨道进行访问操作的强度的轨迹交叉信号。此外，由于尺寸在陆地上产生改进的反射率，所以光学存储器实现了改进的C / N和记录密度。

77. 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。

78. 发明授权

US4956243A Optical memory element 失效
标题翻译：光学存储元件
公开(公告)号：US4956243A
公开(公告)日：1990-09-11
申请号：US9211
申请日：1987-01-30
申请人： Tomoyuki Miyake , Yoshiteru Murakami , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Tomoyuki Miyake , Yoshiteru Murakami , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B7/24 , G11B7/241 , G11B11/105 , G11B13/04
CPC分类号： G11B7/258 , G11B11/10586 , G11B11/10589 , G11B13/045 , G11B7/24 , G11B7/241 , G11B2007/24306 , G11B2007/25708 , G11B2007/25713 , G11B7/2531 , G11B7/2533 , G11B7/2534 , G11B7/2585 , G11B7/259 , G11B7/2595 , Y10S428/90
摘要： An optical memory element contains first and second reflector films, wherein the first reflector film is made of a material of a sufficiently large light reflectance in a relative sense as compared to the second reflector film, and the second reflector film being made of a material of a sufficiently small thermal conductivity in a relative sense as compared to the first reflector film.
摘要翻译：光学存储元件包含第一和第二反射膜，其中与第二反射膜相比，第一反射膜由与相对意义上的足够大的光反射率的材料制成，第二反射膜由材料制成与第一反射膜相比，相对意义上的足够小的热导率。

79. 发明授权

US4786559A Magnetooptical storage element 失效
标题翻译：磁光存储元件
公开(公告)号：US4786559A
公开(公告)日：1988-11-22
申请号：US945354
申请日：1986-12-22
申请人： Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Tomoyuki Miyake , Kenji Ohta , Michinobu Mieda
发明人： Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Tomoyuki Miyake , Kenji Ohta , Michinobu Mieda
IPC分类号： G11B5/64 , G11B11/105 , G11B7/24
CPC分类号： G11B5/64 , G11B11/10586 , Y10S428/90
摘要： A magnetooptical storage element comprising a recording layer of a multi-layered structure including a reflecting film, said reflecting film being made of metals or metalloids having a low thermal conductivity coefficient.
摘要翻译：一种磁光存储元件，包括包括反射膜的多层结构的记录层，所述反射膜由具有低导热系数的金属或准金属制成。

80. 发明授权

US6067285A Optical disc 失效
标题翻译：光盘
公开(公告)号：US6067285A
公开(公告)日：2000-05-23
申请号：US54125
申请日：1993-04-27
申请人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
发明人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
IPC分类号： G11B7/24 , G11B7/254 , G11B7/257 , G11B11/10 , G11B11/105 , G11B3/70 , G11B5/84
CPC分类号： G11B7/24067 , G11B11/10584 , G11B11/10586 , G11B7/2403 , G11B7/252 , G11B7/2542 , G11B7/257 , G11B2007/24306 , G11B2007/25706 , G11B2007/25708 , G11B2007/2571 , G11B2007/25713 , G11B2007/25715 , G11B7/2534 , G11B7/2585
摘要： An optical disc having a recording film formed on one surface of a plastics substrate transparent to light, a first protection film formed on the recording film, a moisture proof film formed on the other surface of the substrate, and a second protection film formed on the moisture proof film.
摘要翻译：一种光盘，其具有形成在对光透明的塑料基板的一个表面上的记录膜，形成在记录膜上的第一保护膜，形成在基板的另一个表面上的防潮膜，以及形成在该基板上的第二保护膜防潮膜。

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