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公开(公告)号：EP0886266A3
公开(公告)日：2000-12-13
申请号：EP98111220.4
申请日：1998-06-18
CPC分类号： G11B7/00745 , G11B7/007 , G11B7/00718 , G11B7/0938 , G11B7/0956 , G11B11/10515 , G11B11/10582 , G11B27/19 , G11B27/3027 , G11B2220/20
摘要： An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.
摘要翻译： 提供一种用于光盘的光盘和光盘驱动器，其适用于以高密度记录数据。 光盘D使用焊盘和凹槽作为记录磁道。 每个轨道由一个地址段和四十五个数据段组成。 地址段在其一侧是摆动的。 每个数据段都是一个直流槽。 地址段记录包括同步信号，帧地址，轨道地址和CRC，倾斜图案和时钟标记的地址信息。 时钟标记适于在标记之前反射一个量的激光束，并在标记之后反射另一个量。 倾斜图案与其他区域具有不同的轨道间距。 数据段磁光记录数据。
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2.发明公开Magneto-optical recording/reproducing apparatus and method 审中-公开Gerätund Verfahren zur magneto-optischen Aufzeichnung / Wiedergabe
公开(公告)号：EP0910077A2
公开(公告)日：1999-04-21
申请号：EP98119496.2
申请日：1998-10-15
申请人： HITACHI, LTD. , SONY CORPORATION , SHARP KABUSHIKI KAISHA , OLYMPUS OPTICAL CO., LTD. , SANYO ELECTRIC Co., Ltd. , FUJITSU LIMITED , HITACHI MAXELL, LTD.
发明人： Tanaka, Yasuhito , Kurebayashi, Masaaki , Maeda, Takeshi , Watanabe, Hitoshi , Watanabe, Tetsu , Maeda, Shigemi , Sumi, Satoshi , Matsubayashi, Nobuhide , Matsuura, Michio
IPC分类号： G11B11/10
CPC分类号： G11B7/126 , G11B7/094 , G11B7/0941 , G11B7/0945 , G11B7/0956 , G11B11/10515 , G11B11/10576 , G11B11/10595
摘要： A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium (1) at least including a first magnetic film having magneto-optical information recorded on a track and having perpendicular magnetic anisotropy, and a second magnetic film to which the magneto-optical information recorded on the first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto the second magnetic film to thereby readout the magneto-optical information transferred to the second magnetic film. The apparatus includes a 2-split detection circuit (18) constituted by two detection elements (18a, 18b) for receiving the readout laser beam reflected from the second magnetic film of the magneto-optical information recording medium, and a subtraction circuit (19) in which output signals of the two detection elements of the 2-split detection circuit having levels corresponding to the quantities of light received by the two detection elements respectively are subtracted from each other to generate a differential signal expressing the difference between the output signals. The apparatus further comprises a circuit (22, 23) for making a spot of the laser beam jump one track before readout of the magneto-optical information from the magneto-optical information recording medium, a positive/negative balance correction circuit (20) for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in the differential signal from the subtraction circuit in response to the track jump to thereby output a correction signal in accordance with the amplitude ratio, and an addition circuit (21) for adding the correction signal to the differential signal to thereby generate a tracking error signal for tracking control used in readout of the magneto-optical information from the magneto-optical information recording medium.
摘要翻译： 一种磁光信息记录/再现装置，其中至少包括记录在轨道上并具有垂直磁各向异性的磁光信息的第一磁膜的磁光信息记录介质（1）和第二磁膜， 记录在第一磁性膜上的磁光信息通过激光束的照射被传送，使得读出的激光束照射到第二磁性膜上，从而读出传递到第二磁性膜的磁光信息。 该装置包括由用于接收从磁光信息记录介质的第二磁膜反射的读出激光束的两个检测元件（18a，18b）和减法电路（19）构成的二分割检测电路（18） 其中分离检测电路的两个检测元件的输出信号分别相应于由两个检测元件接收的光量的电平，以产生表示输出信号之间的差的差分信号。 该装置还包括一个电路（22,23），用于在从磁光信息记录介质读出磁光信息之前使激光束的点跳跃到一个磁道;正/负平衡校正电路（20），用于 检测来自所述减法电路的差分信号中产生的磁道跳转信号中的正负振幅之间的振幅比，以响应于所述磁道跳跃，从而根据所述振幅比输出校正信号，以及加法电路（21） 用于将校正信号添加到差分信号，从而生成用于跟踪来自磁光信息记录介质的磁光信息读出中使用的控制的跟踪误差信号。
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公开(公告)号：EP0910077A3
公开(公告)日：2002-01-16
申请号：EP98119496.2
申请日：1998-10-15
申请人： Hitachi, Ltd. , SONY CORPORATION , SHARP KABUSHIKI KAISHA , OLYMPUS OPTICAL CO., LTD. , SANYO ELECTRIC Co., Ltd. , FUJITSU LIMITED , HITACHI MAXELL, LTD.
发明人： Tanaka, Yasuhito , Kurebayashi, Masaaki , Maeda, Takeshi , Watanabe, Hitoshi , Watanabe, Tetsu , Maeda, Shigemi , Sumi, Satoshi , Matsubayashi, Nobuhide , Matsuura, Michio
IPC分类号： G11B11/10
CPC分类号： G11B7/126 , G11B7/094 , G11B7/0941 , G11B7/0945 , G11B7/0956 , G11B11/10515 , G11B11/10576 , G11B11/10595
摘要： A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium (1) at least including a first magnetic film having magneto-optical information recorded on a track and having perpendicular magnetic anisotropy, and a second magnetic film to which the magneto-optical information recorded on the first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto the second magnetic film to thereby readout the magneto-optical information transferred to the second magnetic film. The apparatus includes a 2-split detection circuit (18) constituted by two detection elements (18a, 18b) for receiving the readout laser beam reflected from the second magnetic film of the magneto-optical information recording medium, and a subtraction circuit (19) in which output signals of the two detection elements of the 2-split detection circuit having levels corresponding to the quantities of light received by the two detection elements respectively are subtracted from each other to generate a differential signal expressing the difference between the output signals. The apparatus further comprises a circuit (22, 23) for making a spot of the laser beam jump one track before readout of the magneto-optical information from the magneto-optical information recording medium, a positive/negative balance correction circuit (20) for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in the differential signal from the subtraction circuit in response to the track jump to thereby output a correction signal in accordance with the amplitude ratio, and an addition circuit (21) for adding the correction signal to the differential signal to thereby generate a tracking error signal for tracking control used in readout of the magneto-optical information from the magneto-optical information recording medium.
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公开(公告)号：EP0886266B1
公开(公告)日：2006-03-01
申请号：EP98111220.4
申请日：1998-06-18
CPC分类号： G11B7/00745 , G11B7/007 , G11B7/00718 , G11B7/0938 , G11B7/0956 , G11B11/10515 , G11B11/10582 , G11B27/19 , G11B27/3027 , G11B2220/20
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公开(公告)号：EP0886266A2
公开(公告)日：1998-12-23
申请号：EP98111220.4
申请日：1998-06-18
IPC分类号： G11B7/007
CPC分类号： G11B7/00745 , G11B7/007 , G11B7/00718 , G11B7/0938 , G11B7/0956 , G11B11/10515 , G11B11/10582 , G11B27/19 , G11B27/3027 , G11B2220/20
摘要： An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density.
The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.-
6.发明公开Lens assembly and optical head using the same 有权Linsenanordnung und deren Verwendung in einem optischen Abtastkopf
公开(公告)号：EP1026676A2
公开(公告)日：2000-08-09
申请号：EP99308683.4
申请日：1999-11-02
申请人： FUJITSU LIMITED
发明人： Matsuura, Michio
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B11/10543
摘要： A lens assembly (10) is provided for causing a laser beam (B) to form a focal spot (P) in a recording region (D2) of an optical recording medium (D) including a substrate (D1). The lens assembly (10) includes a plurality of focusing lenses (20) each including an incidence surface (21) for receiving the laser beam and an emitting surface (22) for emitting the laser beam. Each focusing lens (20) is arranged so that the emitted laser beam is caused to converge at a first focus (F 1 ) located in contact with the substrate of the optical recording medium (D). The focusing lens (20) is also arranged so that light sent from the first focus (F 1 ) is caused to converge at a second focus (F 2 ) located in the recording region (D 2 ) of the optical recording medium (D) to form the focal spot.
摘要翻译： 提供了一种用于使激光束（B）在包括衬底（D1）的光学记录介质（D）的记录区域（D2）中形成焦点（P）的透镜组件（10）。 透镜组件（10）包括多个聚焦透镜（20），每个聚焦透镜包括用于接收激光束的入射表面（21）和用于发射激光束的发射表面（22）。 每个聚焦透镜（20）被布置成使得发射的激光束在与光记录介质（D）的基板接触的第一焦点（F1）处会聚。 聚焦透镜（20）还被布置成使得从第一焦点（F1）发射的光在位于光记录介质（D）的记录区域（D2）中的第二焦点（F2）处会聚，以形成 焦点
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公开(公告)号：EP1026676B1
公开(公告)日：2007-01-17
申请号：EP99308683.4
申请日：1999-11-02
申请人： FUJITSU LIMITED
发明人： Matsuura, Michio
CPC分类号： G11B7/1374 , G11B11/10543
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公开(公告)号：EP1026676A3
公开(公告)日：2003-05-14
申请号：EP99308683.4
申请日：1999-11-02
申请人： FUJITSU LIMITED
发明人： Matsuura, Michio
CPC分类号： G11B7/1374 , G11B11/10543
摘要： A lens assembly (10) of an optical head is provided for causing a laser beam (B) to form a focal spot (P) in a recording region (D2) of an optical recording medium (D) including a substrate (D1). The lens assembly (10) includes a plurality of focusing lenses (20) each including an incidence surface (21) for receiving the laser beam and an emitting surface (22) for emitting the laser beam. Each focusing lens (20) is arranged so that the emitted laser beam is caused to converge at a first focus (F 1 ) located in contact with the substrate of the optical recording medium (D). The focusing lens (20) is also arranged so that light sent from the first focus (F 1 ) is caused to converge at a second focus (F 2 ) located in the recording region (D 2 ) of the optical recording medium (D) to form the focal spot.
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公开(公告)号：EP1780716A3
公开(公告)日：2008-05-14
申请号：EP06000871.1
申请日：2006-01-17
申请人： FUJITSU LIMITED
CPC分类号： G11B20/1833 , G06F11/1092
摘要： A method is provided for storing data by distributing the data into plural storage units that are accessible independently of one another. The method includes the steps of dividing data to be stored into plural data blocks, generating parity data corresponding to the data blocks, distributing the plural data blocks and the parity data into the storage units to let the storage units store the same, responding to a situation where any of the storage units becomes inaccessible, reconstructing data stored in the storage unit that has become inaccessible before the situation occurs based on data stored in the remaining storage units, dividing the reconstructed data into plural reconstructed data blocks, generating parity data corresponding to the reconstructed data blocks, and distributing the plural reconstructed data blocks and the parity data corresponding thereto into accessible storage units to let the accessible storage units store the same.
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公开(公告)号：EP1780716A2
公开(公告)日：2007-05-02
申请号：EP06000871.1
申请日：2006-01-17
申请人： FUJITSU LIMITED
IPC分类号： G11B20/18
CPC分类号： G11B20/1833 , G06F11/1092
摘要： A method is provided for storing data by distributing the data into plural storage units that are accessible independently of one another. The method includes the steps of dividing data to be stored into plural data blocks, generating parity data corresponding to the data blocks, distributing the plural data blocks and the parity data into the storage units to let the storage units store the same, responding to a situation where any of the storage units becomes inaccessible, reconstructing data stored in the storage unit that has become inaccessible before the situation occurs based on data stored in the remaining storage units, dividing the reconstructed data into plural reconstructed data blocks, generating parity data corresponding to the reconstructed data blocks, and distributing the plural reconstructed data blocks and the parity data corresponding thereto into accessible storage units to let the accessible storage units store the same.
摘要翻译： 提供了一种通过将数据分配到彼此独立地可访问的多个存储单元来存储数据的方法。 该方法包括以下步骤：将要存储的数据划分成多个数据块，产生与数据块相对应的奇偶校验数据，将多个数据块和奇偶校验数据分配到存储单元中，以使存储单元存储单元， 根据存储在剩余存储单元中的数据，重新生成存储在存储单元中的存储单元中不可访问的数据的情况，将重构数据划分为多个重构数据块，生成对应于 重建的数据块，并将多个重建的数据块和与其对应的奇偶校验数据分配到可访问的存储单元中，以使可访问的存储单元存储它们。
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