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    Optical recording element and driving system
    12.
    发明授权
    Optical recording element and driving system 失效
    光学记录元件和驱动系统

    公开(公告)号：US5459711A

    公开(公告)日：1995-10-17

    申请号：US219253

    申请日：1994-03-29

    申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

    发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

    IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

    CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

    摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

    摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

    Magneto-optical memory element
    13.
    发明授权
    Magneto-optical memory element 失效
    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

    Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer
    18.
    发明授权
    Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer 失效
    用于从具有读出层，转印层和记录层的磁光记录介质再现数据的方法和装置

    公开(公告)号：US5962126A

    公开(公告)日：1999-10-05

    申请号：US975517

    申请日：1997-11-20

    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： G11B11/10 ,  G11B11/105 ,  G11B5/66

    CPC分类号： G11B11/10515 ,  G11B11/10586 ,  Y10S428/90 ,  Y10T428/26

    摘要： The invention features an apparatus and method for reproducing recorded bits from a magneto-optical recording medium. The medium includes a base, a readout layer formed on the base, a transfer layer formed on the readout layer and a recording layer formed on the transfer layer. The readout and recording layers each exhibit perpendicular magnetization in a temperature range between room temperature and, respectively, the readout layer's Curie temperature and the recording layer's Curie temperature. The transfer layer is predominant in-plane magnetization at room temperature and an in-plane to perpendicular magnetization transition occurs at a temperature above room temperature. Also, the recording layer Curie temperature is lower than the Curie temperature of the transfer layer. The reproducing method includes the steps of projecting a light beam, applying a subsidiary magnetic field and reproducing information based on reflected light from the readout layer while applying the subsidiary magnetic field. The light beam is projected onto the readout layer from the side of the base so the in-plane to perpendicular magnetization transition occurs in a portion of the transfer layer, the portion corresponding to a central portion of the light beam spot. The intensity of the subsidiary magnetic field is higher than the coercive force of the readout layer and less than the exchange coupling force exerted from the recording-layer and the transfer layer to the readout layer.

    摘要翻译： 本发明的特征在于一种用于从磁光记录介质再现记录位的装置和方法。 介质包括基底，形成在基底上的读出层，形成在读出层上的转印层和形成在转印层上的记录层。 读出和记录层各自在室温和读出层的居里温度和记录层的居里温度之间的温度范围内呈现垂直磁化强度。 转移层在室温下是主要的面内磁化，并且在高于室温的温度下发生面内到垂直磁化转变。 此外，记录层居里温度低于转印层的居里温度。 再现方法包括以下步骤：投射光束，施加辅助磁场，并且在施加辅助磁场的同时基于来自读出层的反射光再现信息。 光束从基底侧投射到读出层上，因此在转移层的一部分中发生垂直磁化转变，该部分对应于光束点的中心部分。 辅助磁场的强度高于读出层的矫顽力，并且小于从记录层和转印层施加到读出层的交换耦合力。

    Optical recording element and driving system
    19.
    发明授权
    Optical recording element and driving system 失效
    光学记录元件和驱动系统

    公开(公告)号：US5335220A

    公开(公告)日：1994-08-02

    申请号：US821361

    申请日：1992-01-16

    申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

    发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

    IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

    CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

    摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

    摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

    Magneto-optical memory element
    20.
    再颁专利
    Magneto-optical memory element 失效
    磁光存储元件

    公开(公告)号：USRE35629E

    公开(公告)日：1997-10-14

    申请号：US136019

    申请日：1993-10-14

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

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

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10584 ,  G11B11/10586

    摘要： A magneto-optical memory element has a multi-layer construction in the order from a side first receiving light from a light-source which includes a first transparent dielectric film, a rare earth transition metal alloy film, a second transparent dielectric film and a reflective film. The magneto-optical device uses circular dichroism effect of a magnetic mater for reading information. The rare earth transition metal alloy film has a refractive index represented by n.+-..DELTA.n wherein n=3.2-3.55i and .DELTA.n=0.05-0.03i. The thickness of film is about 18 to 46 nm. The second transparent dielectric film has a refractive index of 2.0.+-.0.2 and a film thickness of 80 to 108 nm.

    摘要翻译： 磁光存储元件具有从第一次接收来自光源的一侧的顺序的多层结构，该光源包括第一透明电介质膜，稀土过渡金属合金膜，第二透明电介质膜和反射 电影。 磁光装置使用磁性体的圆二色性来读取信息。 稀土过渡金属合金膜的折射率为n +/- DELTA n，n = 3.2-3.55i，DELTA n = 0.05-0.03i。 膜的厚度为约18至46nm。 第二透明电介质膜的折射率为2.0 +/- 0.2，膜厚为80〜108nm。