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    • 1. 发明授权
    • Optical recording medium having pit rows
    • 具有凹坑行的光记录介质
    • US06058100A
    • 2000-05-02
    • US928042
    • 1997-09-11
    • Michinobu MiedaJunji HirokaneAkira TakahashiKenji OhtaShigeo Terashima
    • Michinobu MiedaJunji HirokaneAkira TakahashiKenji OhtaShigeo Terashima
    • G11B7/24G11B7/00G11B7/005G11B7/007G11B7/013G11B7/09G11B7/26G11B11/10G11B11/105G11B27/10
    • G11B7/24085G11B11/10565G11B7/00718G11B7/0938G11B7/261
    • 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.
    • 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。
    • 3. 发明授权
    • Optical recording element and driving system
    • 光学记录元件和驱动系统
    • US5459711A
    • 1995-10-17
    • US219253
    • 1994-03-29
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • G11B7/0045G11B7/013G11B7/09G11B7/125G11B7/24G11B7/24085G11B11/105G11B19/02G11B3/78
    • G11B7/0045G11B11/10528G11B11/10578G11B11/10595G11B19/02G11B7/0938G11B7/126G11B7/24G11B7/24085
    • 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.
    • 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。
    • 6. 发明授权
    • Magneto-optical recording medium and method of recording and reproducing
using the same
    • 磁光记录介质及使用其的记录和再现方法
    • US5683803A
    • 1997-11-04
    • US433088
    • 1995-05-03
    • Junichiro NakayamaMichinobu MiedaJunji HirokaneAkira TakahashiKenji Ohta
    • Junichiro NakayamaMichinobu MiedaJunji HirokaneAkira TakahashiKenji Ohta
    • G11B11/10G11B11/105G11B5/66B32B5/16
    • G11B11/10586G11B11/10506G11B11/10515G11B11/10523Y10S428/90Y10T428/26Y10T428/265
    • A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer being laminated. When information is to be recorded on the first magnetic layer, first, a magnetization direction in the second magnetic layer is arranged in one direction with an application of an initialization magnetic field. Then, an intensity modulated light beam is projected while applying thereto a recording magnetic field so as to change the magnetization direction in the second magnetic layer. Thereafter, the magnetization direction in the second magnetic layer is copied to the first magnetic layer, thereby recording information. The first magnetic layer has a magnetization in an intermediate direction between a perpendicular direction and an in-plane direction at room temperature, while has a perpendicular magnetization at above a predetermined temperature. Therefore, a smaller exchange coupling force is exerted from the first magnetic layer to the second magnetic layer at room temperature, thereby enabling a rewriting information with a smaller initialization magnetic field compared with the conventional method, thereby achieving a reduction in size of the apparatus and power conservation.
    • 磁光记录介质包括层叠的第一磁性层和第二磁性层。 当要在第一磁性层上记录信息时,首先,通过施加初始化磁场,将第二磁性层中的磁化方向布置在一个方向上。 然后,施加强度调制光束,同时向其施加记录磁场,以改变第二磁性层中的磁化方向。 此后,将第二磁性层中的磁化方向复制到第一磁性层,从而记录信息。 第一磁性层在室温下具有在垂直方向和面内方向之间的中间方向上的磁化强度,同时具有高于预定温度的垂直磁化强度。 因此,与常规方法相比,在室温下从第一磁性层向第二磁性层施加较小的交换耦合力,从而能够实现与常规方法相比具有较小初始化磁场的重写信息,从而实现装置的尺寸减小 省电。
    • 8. 发明授权
    • Magneto-optical recording medium
    • 磁光记录介质
    • US5644566A
    • 1997-07-01
    • US432683
    • 1995-05-02
    • Junichiro NakayamaMichinobu MiedaHiroyuki KatayamaJunji HirokaneAkira TakahashiKenji Ohta
    • Junichiro NakayamaMichinobu MiedaHiroyuki KatayamaJunji HirokaneAkira TakahashiKenji Ohta
    • G11B11/105G11B7/00
    • G11B11/10586G11B11/10517
    • An intermediate layer is formed between a memory layer and a writing layer. The intermediate layer shows in-plane magnetization at room temperature, and perpendicular magnetization within a temperature range within which the coercive force of the memory layer is lower than that of the writing layer. The Curie point of the intermediate layer is lower than that of the memory layer. Like a conventional method, light-intensity modulation overwriting is performed by irradiating laser light whose intensity has been modulated between high level and low level while applying a recording magnetic field after performing an initialization. Even when there are variations in the raised temperature by the irradiation of laser light of high level, it is possible to perform stable overwriting with light-intensity modulation by satisfactorily restraining the exchange forces between the intermediate layer and the writing layer from causing coupling.
    • 在存储层和写入层之间形成中间层。 中间层在室温下显示出平面内的磁化强度,在存储层的矫顽力低于书写层的温度范围内的垂直磁化强度。 中间层的居里点低于存储层的居里点。 像传统方法一样,通过在执行初始化之后照射记录磁场的同时照射强度已经被调制在高电平和低电平之间的激光来执行光强调制重写。 即使通过高水平的激光照射而升高的温度存在变化,也可以通过令人满意地抑制中间层与书写层之间的交换作用而进行光强调制来进行稳定的重写。
    • 10. 发明授权
    • Optical recording element and driving system
    • 光学记录元件和驱动系统
    • US5335220A
    • 1994-08-02
    • US821361
    • 1992-01-16
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • G11B7/0045G11B7/013G11B7/09G11B7/125G11B7/24G11B7/24085G11B11/105G11B19/02G11B3/78
    • G11B7/0045G11B11/10528G11B11/10578G11B11/10595G11B19/02G11B7/0938G11B7/126G11B7/24G11B7/24085
    • 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.
    • 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。