公开(公告)号：US5798992A

公开(公告)日：1998-08-25

申请号：US727047

申请日：1996-10-08

申请人： Shinji Kaneko ,  Seiji Ohura ,  Yoshizo Mihara ,  Yukio Sato

发明人： Shinji Kaneko ,  Seiji Ohura ,  Yoshizo Mihara ,  Yukio Sato

IPC分类号： G11B11/10 ,  G11B7/125 ,  G11B11/105 ,  H01S5/06 ,  H01S5/0683 ,  G11B7/00

CPC分类号： G11B7/126 ,  H01S5/0683

摘要： A laser diode monitoring apparatus activates the laser diode in a manner of impulse, measures the sag of light output level, and judges the light emitting performance to be deteriorated if the sag is greater than the reference value. The value of sag comprehends the inequality of light output characteristics of individual laser diodes and the variation of ambient temperature, enabling the accurate decay determination.

摘要翻译： 激光二极管监视装置以脉冲的方式激活激光二极管，测量光输出电平的下垂，并且如果下垂大于参考值，则判断发光性能会劣化。 松弛的值包括各个激光二极管的光输出特性的不等式和环境温度的变化，从而能够进行准确的衰减测定。

公开(公告)号：US5796683A

公开(公告)日：1998-08-18

申请号：US823757

申请日：1997-03-25

申请人： Satoshi Sumi ,  Kenji Tanase ,  Yoshihisa Suzuki ,  Atsushi Yamaguchi ,  Yoichi Tsuchiya

发明人： Satoshi Sumi ,  Kenji Tanase ,  Yoshihisa Suzuki ,  Atsushi Yamaguchi ,  Yoichi Tsuchiya

IPC分类号： G11B11/10 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B7/1365 ,  G11B11/10543

摘要： An information recording and reproduction apparatus for a magnetically induced superresolution magneto-optical recording medium includes an optical head that emits a laser beam to a signal recording plane of the medium and detecting a laser beam reflected therefrom. The optical head includes a polarization plane rotary unit and a polarizing filter between a light source and an objective lens. The polarization plane rotary unit transmits the laser beam while rotating the direction of polarization of the laser beam. The polarizing filter allows the laser beam to be transmitted at the outer portion independent of the direction of polarization, and allows only the laser beam that is polarized in a particular direction to be transmitted at the inner portion. The polarization plane rotary unit is controlled so as to rotate the direction of polarization of the laser beam in a direction different from the particular direction in reproduction. Thus, the optical superresolution method is carried out with the inner portion of the laser beam for radiation blocked only in reproduction.

摘要翻译： 用于磁感应超分辨率磁光记录介质的信息记录和再现装置包括：光头，其将激光束发射到介质的信号记录平面，并检测从其反射的激光束。 光头包括偏振面旋转单元和光源与物镜之间的偏振滤光器。 偏振面旋转单元在旋转激光束的偏振方向的同时透射激光束。 偏振滤光器允许激光束在外部部分与偏振方向无关地传输，并且仅允许在特定方向上被偏振的激光束在内部传播。 控制偏振面旋转单元，以便在再现中沿与特定方向不同的方向旋转激光束的偏振方向。 因此，光学超分辨率方法是用激光束的内部部分进行的，用于仅在再现中阻挡辐射。

公开(公告)号：US5793711A

公开(公告)日：1998-08-11

申请号：US655115

申请日：1996-05-29

申请人： Nestor Alexander Bojarczuk, Jr. ,  Richard Joseph Gambino ,  Ralph Ruf

发明人： Nestor Alexander Bojarczuk, Jr. ,  Richard Joseph Gambino ,  Ralph Ruf

IPC分类号： C22C19/00 ,  C22C38/00 ,  G11B11/10 ,  G11B11/105 ,  H01F1/00 ,  H01F10/12 ,  H01F41/20 ,  G11B7/00 ,  G11B7/08 ,  G11B7/24

CPC分类号： B82Y25/00 ,  G11B11/10545 ,  G11B11/10586 ,  H01F1/0063 ,  G11B11/10543 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optic memory and a magnetic material is described incorporating a polarized light beam directed towards a magnetic material and an analyzer for intercepting the polarized light beam after passing through the magnetic material or after being reflected by the magnetic material. The magnetic material includes a matrix of metal such as iron, cobalt, nickel, and alloys thereof and a plurality of separated phases distributed in the matrix such as EuS, EuO, EuOTb, PtMnSb, MnAs, MnBi, MnSb, CrO.sub.2, CrTe, GdN, Gd.sub.4 C, other compounds of a rare earth element and manganese compounds. Terbium or neodymium may be dissolved in the matrix of metal and in the plurality of separated phases. The invention overcomes the problem of providing a magnetic material having a Curie point above room temperature, a square perpendicular hysteresis loop at room temperature, a large magneto-optic rotation at the wavelength of interest and a deposition temperature suitable depositing on polymer substrates.

摘要翻译： 描述了磁光存储器和磁性材料，其包括朝向磁性材料的偏振光束和用于在通过磁性材料之后或在被磁性材料反射之后截取偏振光束的分析器。 磁性材料包括诸如铁，钴，镍及其合金的金属基体以及分布在诸如EuS，EuO，EuOTb，PtMnSb，MnAs，MnBi，MnSb，CrO 2，CrTe，GdN之类的基体中的多个分离相 ，Gd4C，其他化合物的稀土元素和锰化合物。 铽或钕可以溶解在金属基体和多个分离相中。 本发明克服了提供具有高于室温的居里点，室温下的正方形垂直磁滞回线，感兴趣波长处的大磁光旋转和适合沉积在聚合物基底上的沉积温度的磁性材料的问题。

公开(公告)号：US5790483A

公开(公告)日：1998-08-04

申请号：US555841

申请日：1995-11-13

申请人： Toshihiko Kawai

发明人： Toshihiko Kawai

IPC分类号： G11B11/10 ,  G11B7/14 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10552 ,  G11B7/14

摘要： A disk drive device is provided to realize a simultaneous dual side access to thus increase the online capacity. Two independent focussed light emitting devices focus light on first and second sides of a magneto-optical disk. Magnetic generating devices are provided in correspondence with the respective focussed light emitting devices. The focussed light emitting devices move in a radial direction or substantially radial direction relative to the disk.

摘要翻译： 提供了一种磁盘驱动器件来实现同时的双面访问，从而增加在线容量。 两个独立的聚焦发光器件将光聚焦在磁光盘的第一和第二面上。 磁性发生装置与相应的聚焦发光装置相对应地设置。 聚焦的发光器件相对于盘在径向方向或基本径向方向上移动。

公开(公告)号：US5787056A

公开(公告)日：1998-07-28

申请号：US766015

申请日：1996-12-13

申请人： Junichiro Nakayama ,  Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi

发明人： Junichiro Nakayama ,  Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00 ,  G11B5/66

CPC分类号： G11B11/10584 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10506

摘要： If the Curie points of the first magnetic layer, second magnetic layer, third magnetic layer and fourth magnetic layer of alloys of rare-earth metal and transition metal as ferrimagnetic materials showing perpendicular magnetization from room temperature to their Curie points are indicated as Tc1, Tc2, Tc3 and Tc4, respectively, the Curie points and room temperature are related by: room temperature

摘要翻译： 如果作为铁氧体材料的稀土金属和过渡金属的合金的第一磁性层，第二磁性层，第三磁性层和第四磁性层的居里点显示出从室温到居里点的垂直磁化率，表示为Tc1，Tc2 ，Tc3和Tc4，居里点和室温分别与室温

公开(公告)号：US5777953A

公开(公告)日：1998-07-07

申请号：US769254

申请日：1996-12-18

申请人： Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10589 ,  G11B11/10593

摘要： A magneto-optical recording medium is arranged so that (1) a first transparent dielectric layer, (2) a reproduction layer showing in-plane magnetization at room temperature while showing perpendicular magnetization in response to temperature rise, (3) a second transparent dielectric layer, (4) a recording layer made of perpendicular magnetization film; and (5) a protective layer are laminated on a substrate in this order. The reproduction layer has a thickness of 5 nm to 30 nm, the second transparent dielectric layer has a thickness of 6 nm to 40 nm, and the recording layer has a thickness of 20 nm to 80 nm. It is possible to separately reproduce individual recording bit even when one or more adjacent recording bits exist within the diameter of the light beam converged onto a target recording bit. This is because the information of a recording magnetic domain of a portion showing in-plane magnetization is masked.

摘要翻译： 磁光记录介质被布置成使得（1）第一透明介电层，（2）再现层，其在室温下显示面内磁化同时响应于温度升高而显示垂直磁化强度，（3）第二透明电介质 层，（4）由垂直磁化膜制成的记录层; 和（5）保护层依次层压在基板上。 再生层的厚度为5nm〜30nm，第二透明电介质层的厚度为6nm〜40nm，记录层的厚度为20nm〜80nm。 即使在收敛到目标记录位上的光束的直径内存在一个或多个相邻记录位，也可以分别再现单个记录位。 这是因为屏蔽显示面内磁化的部分的记录磁畴的信息。

公开(公告)号：US5774440A

公开(公告)日：1998-06-30

申请号：US487354

申请日：1995-06-07

申请人： Noboru Kimura ,  Ronald G. Vitullo ,  Yasuhiro Yamazaki

发明人： Noboru Kimura ,  Ronald G. Vitullo ,  Yasuhiro Yamazaki

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/125 ,  G11B11/10 ,  G11B11/105 ,  G11B19/00 ,  G11B19/02 ,  G11B19/12 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B20/18 ,  G11B27/30

CPC分类号： G11B27/3027 ,  G11B11/10506 ,  G11B11/10513 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10597 ,  G11B19/00 ,  G11B19/02 ,  G11B19/12 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/1258 ,  G11B20/1426 ,  G11B20/1833 ,  G11B7/0045 ,  G11B7/00456 ,  G11B7/005 ,  G11B7/007 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/126 ,  G11B20/1262 ,  G11B2007/0006 ,  G11B2020/1434 ,  G11B2220/2525

摘要： A first write encoder encodes digital data in a first high density format. A second write encoder encodes digital data in a second low density, i.e. ANSI format. A first read decoder decodes digital data from the first format. A second read decoder decodes digital data from the second format. A disk drive receives a replaceable 90 millimeter optical disk. A read/write head reads encoded data from and writes encoded data to a 90 millimeter optical disk received by the drive. In a first mode, the first encoder is connected between a source of digital data and the read/write head, and the first decoder is connected between the read/write head and utilizing apparatus. In a second mode, the second encoder is connected between the source and the read/write head, and the second decoder is connected between the read/write head and the utilizing apparatus. Control electronics switches between the first and second modes, depending upon the format in which data is recorded on the disk received by the disk drive. An 8/9 GCR encoder and a laser pulse generator are used in the first write encoder to record data on the optical media to increase the storage capacity. Improvement in timing is accomplished with write compensation and signal equalization.

摘要翻译： 第一写入编码器以第一高密度格式对数字数据进行编码。 第二写入编码器以第二低密度即ANSI格式对数字数据进行编码。 第一读取解码器从第一格式解码数字数据。 第二读取解码器从第二格式解码数字数据。 磁盘驱动器接收可更换的90毫米光盘。 读/写头读取编码数据并将编码数据写入由驱动器接收的90毫米光盘。 在第一模式中，第一编码器连接在数字数据源和读/写头之间，第一解码器连接在读/写头与利用装置之间。 在第二模式中，第二编码器连接在源和读/写头之间，第二解码器连接在读/写头与利用装置之间。 控制电子设备在第一和第二模式之间切换，这取决于磁盘驱动器接收的磁盘上数据记录的格式。 在第一写入编码器中使用8/9 GCR编码器和激光脉冲发生器来在光学介质上记录数据以增加存储容量。 通过写入补偿和信号均衡来实现时序的改进。

公开(公告)号：US5771142A

公开(公告)日：1998-06-23

申请号：US496325

申请日：1995-06-29

申请人： Fran.cedilla.ois Maurice ,  Jean-Marc Coutellier

发明人： Fran.cedilla.ois Maurice ,  Jean-Marc Coutellier

IPC分类号： G11B5/29 ,  G11B5/008 ,  G11B5/02 ,  G11B5/48 ,  G11B5/49 ,  G11B11/10 ,  G11B11/105 ,  G11B5/265

CPC分类号： G11B5/488 ,  G11B5/00817 ,  G11B5/4893 ,  G11B5/4969 ,  G11B5/4976

摘要： Magnetic write/read heads for writing/reading information on a recording medium passing in front of the heads include several groups of magnetic write/read heads, each group of magnetic write/read heads including several pairs of poles. Each pair of poles is separated by a head gap of an integer multiple of an elementary track width b and forms several head gaps E0 to E7. The head gaps (for example El) have a first width such that they can write across a first width of the recording medium, and the second head gaps (for example E2) have a second width less than the first width and are arranged in such a way that the second head gaps write/read an area of the recording medium superimposed on the area of the recording medium write/read by the first head gaps. The magnetic write/read heads are suitable for applications where multitrack write/read heads are required.

摘要翻译： 用于在通过磁头前方的记录介质上写入/读取信息的磁写入/读取头包括若干磁性写入/读取磁头组，每组磁性写/读磁头包括几对磁极。 每对极通过基本轨道宽度b的整数倍的磁头间隙分开并形成几个磁头间隙E0至E7。 磁头间隙（例如E1）具有第一宽度，使得它们能够跨越记录介质的第一宽度写入，并且第二磁头间隙（例如E2）具有小于第一宽度的第二宽度，并且布置成 第二磁头间隙写入/读取由第一磁头间隙写入/读取的记录介质的区域上的记录介质的区域的方式。 磁性写/读磁头适用于需要多轨写/读磁头的应用。

公开(公告)号：US5768298A

公开(公告)日：1998-06-16

申请号：US602708

申请日：1996-02-16

申请人： Yutaka Nagai ,  Masafumi Nakamura ,  Toshifumi Takeuchi ,  Masayuki Hirabayashi

发明人： Yutaka Nagai ,  Masafumi Nakamura ,  Toshifumi Takeuchi ,  Masayuki Hirabayashi

IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B7/004 ,  G11B11/10 ,  G11B11/105 ,  G11B20/12 ,  G11B20/18 ,  G11B27/30 ,  H04N5/783 ,  H04N5/85 ,  H04N9/804

CPC分类号： H04N5/783 ,  G11B20/1254 ,  G11B20/1809 ,  G11B27/3027 ,  H04N9/8042 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1267 ,  G11B2020/1287 ,  G11B2020/1288 ,  G11B2220/20 ,  G11B2220/213 ,  G11B2220/2545 ,  H04N5/85

摘要： In a system recording compressed video and audio signals or computer user data on a disk in the sector unit, to reproduce the data in a simple fashion at a high speed, data to be recorded on the disk is divided into data in a predetermined unit so as to add a first error correction (C1) code to each of the resultant data, which form (C1) correction blocks. Sectors are produced each including a plurality of (C1) correction blocks. Added to each (C1) correction block is a code enabling identification of a sector. To all data in the plural (C1) correction blocks, a second error correction (C2) code is added to record the resultant data on the disk to allow interleaving or deinterleaving completing in a block. The capacity of each sector is set to be substantially equal to that of a plurality of transport packets.

摘要翻译： 在扇区单元中的磁盘上记录压缩的视频和音频信号或计算机用户数据的系统中，为了以高速将简单的方式再现数据，将被记录在盘上的数据被划分为预定单元中的数据 以向每个形成（C1）校正块的结果数据添加第一纠错（C1）码。 产生各自包括多个（C1）校正块的扇区。 添加到每个（C1）校正块是能够识别扇区的代码。 对于多个（C1）校正块中的所有数据，添加第二纠错（C2）代码以将结果数据记录在盘上，以允许块中的交织或解交织完成。 每个扇区的容量被设置为基本上等于多个传输分组的容量。

公开(公告)号：US5764600A

公开(公告)日：1998-06-09

申请号：US464371

申请日：1995-06-05

申请人： Yoshio Fujii ,  Tatsuya Fukami ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi

发明人： Yoshio Fujii ,  Tatsuya Fukami ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10521 ,  G11B11/10584 ,  G11B11/10586 ,  Y10S428/90

摘要： A recording/reproduction method for recording or reproducing information using the magneto-optical recording medium, the magneto-optical recording medium comprising a first magnetic layer comprising a rare earth-transition metal alloy or a ferromagnetic material containing a magnetic transition metal, a second magnetic layer comprising a rare earth-transition metal alloy, a third magnetic layer comprising a rare earth-transition metal alloy, a fourth magnetic layer comprising a rare earth-transition metal alloy, a fifth magnetic layer comprising a rare earth-transition metal alloy, and a sixth magnetic layer comprising a rare earth-transition metal alloy, the second to sixth magnetic layers being stacked in this order on the first magnetic layer, adjacent layers of the second to sixth magnetic layers being coupled by an exchange force thereof.

摘要翻译： 一种用于使用磁光记录介质记录或再现信息的记录/再现方法，该磁光记录介质包括由稀土 - 过渡金属合金构成的第一磁性层或含有磁性过渡金属的铁磁材料，第二磁性层 包含稀土 - 过渡金属合金的层，包含稀土金属过渡金属合金的第三磁性层，包含稀土金属合金的第四磁性层，包含稀土 - 过渡金属合金的第五磁性层和 包括稀土 - 过渡金属合金的第六磁性层，所述第二至第六磁性层依次堆叠在所述第一磁性层上，所述第二至第六磁性层的相邻层通过其交换力耦合。