公开(公告)号：US06831882B1

公开(公告)日：2004-12-14

申请号：US09869627

申请日：2001-06-29

申请人： Makoto Takashima ,  Hideki Aikoh ,  Hideki Nakata ,  Hironori Tomita ,  Tadashi Kuroda ,  Toru Tanaka

发明人： Makoto Takashima ,  Hideki Aikoh ,  Hideki Nakata ,  Hironori Tomita ,  Tadashi Kuroda ,  Toru Tanaka

IPC分类号： G11B700

CPC分类号： G11B33/1406 ,  G11B7/08582 ,  G11B7/12 ,  G11B7/123 ,  G11B11/10545 ,  G11B11/10552 ,  G11B11/10571

摘要： An optical head including a light source for emitting luminous energy recordable on a recording medium, a heat radiating section, in contact with the light source, for radiating heat which accompanies the light emission thereof, and a resin-made bench for mounting and fixing the aforementioned elements, or an optical head having a light source for generating luminous energy required for recording on a disk-shaped information recording medium or reproducing information recorded on the disk-shaped information recording medium; a radiator plate, in contact with the light source either directly or indirectly, for guiding heat which accompanies the emission of light by the light source; an objective lens for focusing light on the disk-shaped information recording medium; an objective lens drive unit for driving the objective lens in the focal and radial direction of the medium; a light receiving element for receiving light reflected from the medium; a sheet-shaped flexible circuit for feeding power to the light source and the light receiving element and communicating signals from the light receiving element; and an optical bench holding at least the light source, the objective lens drive unit, the radiator plate and the light receiving element, in which the radiator plate is brought into contact with a heat transfer section provided in the flexible circuit and, by causing the flexible circuit to guide heat from the radiator plate, heat generated by the light source is radiated through the flexible circuit and the radiator plate.

摘要翻译： 一种光学头，包括用于发射可记录在记录介质上的光能的光源，与光源接触的散热部分，用于散发伴随其发光的热量;以及树脂制台架，用于安装和固定 或者具有用于产生记录在盘形信息记录介质上或者再现记录在盘形信息记录介质上的信息所需的光能的光源的光学头; 直接或间接地与光源接触的用于引导伴随光源发光的热的散热板; 用于将光聚焦在盘状信息记录介质上的物镜; 用于在所述介质的焦点和径向方向上驱动所述物镜的物镜驱动单元; 用于接收从介质反射的光的光接收元件; 用于向光源和光接收元件供电以及来自光接收元件的信号的片状柔性电路; 以及至少保持光源，物镜驱动单元，散热板和受光元件，其中散热板与设置在柔性电路中的传热部分接触，并且通过使 用于引导散热板的热量的柔性电路，由光源产生的热量通过柔性电路和散热板辐射。

公开(公告)号：US06563768B2

公开(公告)日：2003-05-13

申请号：US09738166

申请日：2000-12-15

申请人： Yasukiyo Kunimatsu ,  Kazuhito Yokoyama

发明人： Yasukiyo Kunimatsu ,  Kazuhito Yokoyama

IPC分类号： G11B1100

CPC分类号： G11B11/10573 ,  G11B11/10515 ,  G11B11/10532 ,  G11B11/10552 ,  G11B11/10576

摘要： A magneto-optical memory device includes a first unit projecting a light beam onto a desired position on a recording medium, and a second unit applying a magnetic field to a position onto which the light beam is projected. The second unit applies, to the recording medium, a predetermined magnetic field within a magnetic field intensity range wherein a rate of change of a reproduced signal amplitude at the time of reproduction with respect to a magnetic field intensity becomes large. The relative positions of the second unit and the first unit are adjusted in accordance with a reproduced signal amplitude thus obtained.

摘要翻译： 磁光存储器件包括：将光束投射到记录介质上的期望位置的第一单元;以及向投影光束的位置施加磁场的第二单元。 第二单元向记录介质施加在相对于磁场强度的再现时的再现信号振幅的变化率变大的磁场强度范围内的预定磁场。 第二单元和第一单元的相对位置根据由此获得的再现信号幅度进行调整。

公开(公告)号：US20010024342A1

公开(公告)日：2001-09-27

申请号：US09803925

申请日：2001-03-13

申请人： Sanyo Electric Co., Ltd

发明人： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Atsushi Yamaguchi ,  Hiroki Ishida

IPC分类号： G11B011/10 ,  G11B005/133

CPC分类号： G11B11/10534 ,  G11B5/127 ,  G11B11/10508 ,  G11B11/10515 ,  G11B11/10541 ,  G11B11/10552 ,  G11B11/10573 ,  G11B11/10578

摘要： A magnetic head comprises a core having a first leg, a second leg and a third leg and a coil wound on the second leg of the core. An end of the second leg is formed by a first portion formed by two inclined surfaces and a second portion formed by a flat surface. When a current is fed to the coil, a magnetic field oblique to a magnetooptical recording medium is generated from the first portion of the second leg, and a magnetic field perpendicular to the magnetooptical recording medium is generated from the second portion. Consequently, a magnetic field perpendicular to the magnetooptical recording medium can be applied to the magnetooptical recording medium for recording a signal, while a magnetooptical field having a prescribed angle with respect to the in-plane direction of the magnetooptical recording medium can be applied to the magnetooptical recording medium for reproducing a signal.

摘要翻译： 磁头包括具有第一腿，第二腿和第三腿的芯，以及缠绕在芯的第二腿上的线圈。 第二支腿的端部由两个倾斜表面形成的第一部分和由平坦表面形成的第二部分形成。 当电流馈送到线圈时，从第二支腿的第一部分产生与磁光记录介质倾斜的磁场，并且从第二部分产生垂直于磁光记录介质的磁场。 因此，可以将垂直于磁光记录介质的磁场施加到用于记录信号的磁光记录介质，而具有相对于磁光记录介质的面内方向具有规定角度的磁光场可以应用于 用于再现信号的磁光记录介质。

公开(公告)号：US6084747A

公开(公告)日：2000-07-04

申请号：US44246

申请日：1998-03-19

申请人： Tomoyuki Takahashi

发明人： Tomoyuki Takahashi

IPC分类号： G11B5/58 ,  G11B11/105 ,  G11B5/48

CPC分类号： G11B11/10552 ,  G11B11/10534 ,  G11B11/10558 ,  G11B11/1058 ,  G11B5/58

摘要： A magnetic head device in which, if a rotated magneto-optical disc is subjected to surface deviations, a slide contact member can have a sliding contact with the magneto-optical disc at a constant slide contact posture at all times to make possible correct application of an external magnetic field. To this end, first resilient flexible portions (7, 7) and second resilient flexible portions (8, 8) have spring constants set so that a point for which an angular change of the first resilient flexible portions (7, 7) is always equal to an angular change of the second resilient flexible portions (8, 8) that is an equilibrium point, will be present within the extent of a slide contact area.

摘要翻译： 一种磁头装置，其中如果旋转的磁光盘经受表面偏差，则滑动接触构件可以始终以恒定的滑动接触姿态与磁光盘滑动接触，以使得可以正确地应用 一个外部磁场。 为此，第一弹性柔性部分（7,7）和第二弹性柔性部分（8,8）具有弹簧常数，使得第一弹性柔性部分（7,7）的角度变化总是相等的点 到作为平衡点的第二弹性柔性部分（8,8）的角度变化将存在于滑动接触区域的范围内。

公开(公告)号：US5719831A

公开(公告)日：1998-02-17

申请号：US768794

申请日：1996-12-18

申请人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B23/03 ,  G11B11/00

CPC分类号： G11B23/0321 ,  G11B11/10552 ,  G11B23/03

摘要： A magneto-optical disk cartridge includes a magnet which is magnetized substantially parallel to a surface of a magneto-optical disk for generating an initializing magnetic field. This structure permits a reduction in the thickness of the magneto-optical disk cartridge.

摘要翻译： 磁光盘盒包括磁体，该磁体基本上平行于磁光盘的表面而被磁化，用于产生初始化磁场。 这种结构允许减小磁光盘盒的厚度。

公开(公告)号：US5644457A

公开(公告)日：1997-07-01

申请号：US412496

申请日：1995-03-28

申请人： William D. Llewellyn ,  Robert J. Strain

发明人： William D. Llewellyn ,  Robert J. Strain

IPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/127 ,  G11B5/29 ,  G11B5/31 ,  G11B5/48 ,  G11B11/105 ,  G11B20/10 ,  G11B20/14 ,  G11B20/20 ,  G11B23/00 ,  G11B5/265 ,  G11B5/17

CPC分类号： G11B20/10222 ,  G11B11/10534 ,  G11B11/10552 ,  G11B20/10009 ,  G11B20/1403 ,  G11B20/20 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/127 ,  G11B5/29 ,  G11B5/31 ,  G11B5/313 ,  G11B5/488 ,  G11B5/4886 ,  G11B23/0007

摘要： A multiple-gap head for transferring data to or from a storage medium is disclosed. Data read by the gaps are directed over a plurality of serial data paths where the data are processed and synchronized. In some embodiments, all or part of a data synchronizer is shared by the serial data paths. The data are then assembled into a parallel data stream for delivery to a computer. Reading the data simultaneously with multiple gaps increases by several times the rate at which data can be transferred to or from a storage medium. In accordance with another aspect of the invention, a three-gap head is provided to reduce or eliminate the cross-talk or noise fringe problems which reduce the track density in a storage medium. A signal attenuator and a signal inverter are connected to each of the side gaps and the outputs thereof are summed with the signal originating at the center gap, such that the inverted signals from the side gaps cancel any cross-talk originating at the center gap. Similarly, an attenuator and an inverter are connected between the write data path (leading to the center gap) and each of the side gaps. During write operations the magnetic flux produced at each of the side gaps has the effect of focusing the magnetic flux produced at the center gap, thereby reducing or eliminating the noise fringe of the written data track.

摘要翻译： 公开了用于向存储介质传送数据或从存储介质传送数据的多间隙头。 由间隙读取的数据被引导到数据被处理和同步的多个串行数据路径上。 在一些实施例中，数据同步器的全部或部分由串行数据路径共享。 然后将数据组装成并行数据流以传送到计算机。 以多个间隙同时读取数据可以将数据传输到存储介质或从存储介质传输的速率增加几倍。 根据本发明的另一方面，提供三间隙头以减少或消除减少存储介质中的轨道密度的串扰或噪声边缘问题。 信号衰减器和信号反相器连接到每个侧面间隙，并且其输出与起始于中心间隙的信号相加，使得来自侧面间隙的反相信号抵消在中心间隙处产生的任何串扰。 类似地，衰减器和反相器连接在写入数据路径（通向中心间隙）和每个侧面间隙之间。 在写入操作期间，在每个侧面间隙处产生的磁通具有聚焦在中心间隙处产生的磁通量的作用，从而减少或消除了写入数据轨迹的噪声边缘。

公开(公告)号：US5402397A

公开(公告)日：1995-03-28

申请号：US136952

申请日：1993-10-13

申请人： Takashi Ohmori ,  Hajime Yano ,  Kazuhiko Fujiie

发明人： Takashi Ohmori ,  Hajime Yano ,  Kazuhiko Fujiie

IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

CPC分类号： G11B11/10534 ,  G11B11/10552

摘要： An optical head applies a laser beam to a region of the magnetooptical disc, and a magnetic head applies a magnetic field to the region of the magnetooptical disc while the laser beam is being applied thereto, thereby to record information in the region. The optical and magnetic heads are interconnected by a link mechanism so that they are movable in unison with each other radially with respect to the magnetooptical disc. An electromagnetic shield is disposed around the magnetic head for blocking magnetic and electric fields parallel to the magnetooptical disc.

摘要翻译： 光学头将激光束施加到磁光盘的区域，并且磁头将磁场施加到磁光盘的区域，同时将激光束施加到其上，从而在该区域中记录信息。 光学磁头和磁头通过连杆机构相互连接，使得它们可相对于磁光盘径向移动。 电磁屏蔽设置在磁头周围，用于阻挡平行于磁光盘的磁场和电场。

公开(公告)号：US5392262A

公开(公告)日：1995-02-21

申请号：US999751

申请日：1992-12-31

申请人： Blair I. Finkelstein ,  Andrew A. Gaudet ,  Terry W. McDaniel ,  Hal A. Rosen ,  Kurt A. Rubin ,  Timothy C. Strand

发明人： Blair I. Finkelstein ,  Andrew A. Gaudet ,  Terry W. McDaniel ,  Hal A. Rosen ,  Kurt A. Rubin ,  Timothy C. Strand

IPC分类号： G11B11/10 ,  G11B7/00 ,  G11B7/24 ,  G11B11/105 ,  G11B13/04 ,  G11B17/32

CPC分类号： G11B11/10508 ,  G11B11/10552 ,  G11B11/10584 ,  G11B11/10597 ,  G11B13/045 ,  G11B2007/0013 ,  G11B7/24038

摘要： A magnetooptical disk has two axially space-apart translucent recording layers. Each translucent recording layer is axially closer to an outer surface of the disk than to the other recording layer. This geometry enables closely axially disposing a magnetic field biasing means to each of the recording layers from opposite axial sides of the disk, respectively. Laser beams are axially introduced into the disk to pass through one of the translucent recording layers in a defocussed state to reach a second recording layer in a focussed state. In this manner, recording in the second layer is effected by a modulated magnetic bias field using a constant intensity laser beam. Two sets of laser beams and magnetic biasing means are provided for recording on both data in both of the recording layers.

摘要翻译： 磁光盘具有两个轴向间隔开的半透明记录层。 每个半透明记录层比另一个记录层更靠近盘的外表面。 这种几何形状能够分别从磁盘的相对的轴向侧向每个记录层轴向设置磁场偏置装置。 激光束被轴向引入到盘中，以透镜状态穿过一个半透明记录层，以达到聚焦状态的第二记录层。 以这种方式，通过使用恒定强度激光束的调制磁偏置场来实现第二层中的记录。 提供两组激光束和磁偏置装置用于在两个记录层中的两个数据上进行记录。

公开(公告)号：US5367508A

公开(公告)日：1994-11-22

申请号：US16824

申请日：1993-02-10

申请人： Shinji Haba

发明人： Shinji Haba

IPC分类号： G11B11/105 ,  G11B11/00 ,  G11B5/127

CPC分类号： G11B11/10534 ,  G11B11/10552 ,  G11B11/1056

摘要： A magnetic field generation mechanism is confirmed by combining a plurality of magnets that generate magnetic fields in different directions. Since the magnetic field strength of the magnet for initialization magnetic field can be increased without increasing its thickness by providing a magnet for amplification that generates a magnetic field in a direction perpendicular to the magnet for initialization, a compact, thin device can be realized utilizing a magneto-optical recording device capable of direct overwrite on switched connection multilayer film. Further, by including a rotatable biased magnet, the device can also be used on prior art rewritable magneto-optical discs.

摘要翻译： 通过组合在不同方向上产生磁场的多个磁体来确认磁场产生机构。 由于通过提供用于初始化的磁铁垂直方向上产生磁场的用于放大的磁体，可以提高用于初始化磁场的磁体的磁场强度而不增加其厚度，因此可以利用 能够直接覆盖交换连接多层膜的磁光记录装置。 此外，通过包括可旋转偏置的磁体，该装置也可以用于现有技术的可重写磁光盘上。

公开(公告)号：US5270987A

公开(公告)日：1993-12-14

申请号：US509743

申请日：1990-04-17

申请人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

发明人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10536 ,  G11B11/10545 ,  G11B11/10552 ,  G11B11/10558 ,  G11B11/10593 ,  G11B11/10571

摘要： A magnetic field of a polarity corresponding to information to be recorded is applied while a recording spot having a high energy is irradiated to a magneto-optical recording medium to record domains representing the information along a track. The recorded domains are read out by a reproducing spot having a lower energy than the recording spot and a high resolution power along the track. A recording head has an optical system for irradiating the recording spot having the high energy to the magneto-optical recording medium and a magnetic head for applying a magnetic field having a polarity thereof switched in accordance with the information to be recorded, to an irradiation area of the recording spot, a reproducing head has an optical system for irradiating the reproducing spot having the low energy by a laser beam having a wavelength of no larger than 600 nm and a magneto-optical signal detector for detecting a displacement of a polarization plane of a reflected light of the reproducing spot to read out the recording domains. The magneto-optical recording medium is made of a recording film having a multi-layer structure of alternate lamination of metal layers and dielectric layers.

摘要翻译： 将具有高能量的记录点照射到磁光记录介质上，记录与记录信息对应的极性的磁场，记录表示信息沿着轨迹的域。 记录的区域由具有比记录点更低的能量的再现点和沿着轨道的高分辨率电力读出。 记录头具有用于向磁光记录介质照射具有高能量的记录点的光学系统和用于根据要记录的信息将其极性切换的磁场施加到照射区域 的记录点，再现头具有用于通过具有不大于600nm的波长的激光束照射具有低能量的再现点的光学系统和用于检测偏振面的位移的磁光信号检测器 再现点的反射光读出记录区域。 磁光记录介质由具有金属层和电介质层的交替叠层的多层结构的记录膜制成。