公开(公告)号：US5696742A

公开(公告)日：1997-12-09

申请号：US637829

申请日：1996-04-25

申请人： Nobuo Ogata ,  Yasuo Nakata ,  Yoshihiro Sekimoto ,  Kunio Kojima ,  Hideaki Sato

发明人： Nobuo Ogata ,  Yasuo Nakata ,  Yoshihiro Sekimoto ,  Kunio Kojima ,  Hideaki Sato

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13 ,  G11B11/105 ,  G11B7/085

CPC分类号： G11B7/094 ,  G11B7/0941 ,  G11B11/10576 ,  G11B7/0904 ,  G11B7/0943 ,  G11B7/0948

摘要： A light sensor is divided into two light receiving sections which receive light reflected by an optical disk. A first intermediate address signal is generated from a difference signal of outputs of the light receiving sections. A second intermediate address signal is generated from a sum signal of outputs of the light receiving sections. An address generating circuit generates an address signal by using the first and second intermediate address signals. An optical disk device stably generating an address signal regardless of a displacement of an objective lens and a change in reflectance of the optical disk is thus provided.

摘要翻译： 光传感器被分成接收由光盘反射的光的两个光接收部分。 从光接收部分的输出的差分信号产生第一中间地址信号。 从光接收部分的输出的和信号产生第二中间地址信号。 地址产生电路通过使用第一和第二中间地址信号来产生地址信号。 因此，提供了不管物镜的位移和光盘的反射率的变化如何稳定地产生地址信号的光盘装置。

公开(公告)号：US5999502A

公开(公告)日：1999-12-07

申请号：US539523

申请日：1995-10-06

申请人： Yasuo Nakata ,  Nobuo Ogata ,  Kunio Kojima ,  Hideaki Sato

发明人： Yasuo Nakata ,  Nobuo Ogata ,  Kunio Kojima ,  Hideaki Sato

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B11/105 ,  G11B7/095

CPC分类号： G11B7/00718 ,  G11B7/094 ,  G11B7/0945 ,  G11B11/10576 ,  G11B7/0908

摘要： In an optical information recording-reproduction apparatus, a focus servo control circuit generates a focus error signal and a light beam is accurately converged on a surface of an optical disk according to a focus servo control signal based upon the focus error signal. In accordance with the present invention, the focus error signal is compensated by selecting a land section focus offset amount by a switch when land sections are tracked, and it is compensated by selecting a groove section focus offset amount when groove sections are tracked. As a result, since the land sections and the groove sections are controlled by different focus servo control signals, recording and reproducing operations are carried out at the most optimal focusing positions respectively obtainable, thereby making it possible to significantly improve the quality of a reproduced signal.

摘要翻译： 在光信息记录再生装置中，聚焦伺服控制电路根据聚焦误差信号，根据聚焦伺服控制信号，生成聚焦误差信号，光束精确地会聚在光盘的表面上。 根据本发明，通过在跟踪陆地部分时通过开关选择陆地区域焦点偏移量来补偿聚焦误差信号，并且当通过跟踪沟槽部分时选择沟槽部分聚焦偏移量来补偿聚焦误差信号。 结果，由于通过不同的聚焦伺服控制信号来控制焊盘部分和沟槽部分，所以可以分别获得的最佳聚焦位置进行记录和再现操作，从而可以显着提高再现信号的质量 。

公开(公告)号：US5659528A

公开(公告)日：1997-08-19

申请号：US348158

申请日：1994-11-28

申请人： Kunio Kojima ,  Yoshihiro Sekimoto ,  Yasuo Nakata ,  Tomoyuki Miyake ,  Nobuo Ogata ,  Toshiharu Inui

发明人： Kunio Kojima ,  Yoshihiro Sekimoto ,  Yasuo Nakata ,  Tomoyuki Miyake ,  Nobuo Ogata ,  Toshiharu Inui

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B11/10 ,  G11B11/105 ,  G11B20/10 ,  G11B27/034 ,  G11B27/10 ,  G11B5/09

CPC分类号： G11B20/10527 ,  G11B11/10508 ,  G11B11/10563 ,  G11B11/10595 ,  G11B27/034 ,  G11B27/105 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545

摘要： An information recording-reproduction method wherein: upon reproducing, recorded information corresponding to a predetermined number of sectors from the leading sector of each of a plurality of information tracks on an optical disk is preliminarily stored on a buffer memory, and during a period in which the optical pickup is shifted to another information track, the recording information, stored in the buffer memory, is reproduced; and upon recording, during a period in which the optical pickup is shifted to another information track, recording information is temporarily stored in the buffer memory, and after completion of the recording, the recording information is recorded on the optical disk. In this method, information tracks, which are formed on the optical disk discontinuously with one .another, are regarded as if they were continuous tracks, and the apparent recording and reproducing operation is carried out continuously.

摘要翻译： 一种信息记录再现方法，其中：在再现时，预先将存储在光盘上的多个信息轨道中的每个扇区的预定数量的扇区的记录信息存储在缓冲存储器中，并且在其中 光拾取器移动到另一信息轨道，再现存储在缓冲存储器中的记录信息; 并且在记录时，在光学拾取器被移动到另一个信息轨道的时段期间，将记录信息临时存储在缓冲存储器中，并且在完成记录之后，记录信息被记录在光盘上。 在这种方法中，在光盘上不连续地形成的信息轨迹被认为是连续轨迹，并且连续执行表观记录和再现操作。

公开(公告)号：US5050155A

公开(公告)日：1991-09-17

申请号：US330429

申请日：1989-03-30

申请人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata

发明人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata

IPC分类号： G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： A pick-up device which includes a light source and a condenser lens for effecting recording and reproduction of information by projecting a light beam as collected by the condenser lens onto a recording medium. A diffraction grating is provided between the light source and the condenser lens for dividing light returning from the recording medium by a diffraction grating so as to be directed to a photo-detector, to thereby obtain an optical detection signal.

公开(公告)号：US4849825A

公开(公告)日：1989-07-18

申请号：US928395

申请日：1986-11-10

申请人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata ,  Teruaki Inoue

发明人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata ,  Teruaki Inoue

IPC分类号： G11B7/12 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： A pick-up device which includes a light source and a condenser lens for effecting recording and reproduction of information by projecting a light beam as collected by the condenser lens onto a recording medium. A diffraction grating is provided between the light source and the condenser lens for dividing light returning from the recording medium by a diffraction grating so as to be directed to a photo-detector, to thereby obtain an optical detection signal.

摘要翻译： 一种拾取装置，其包括光源和聚光透镜，用于通过将由聚光透镜收集的光束投射到记录介质上来进行信息的记录和再现。 在光源和聚光透镜之间设置衍射光栅，用于通过衍射光栅分离从记录介质返回的光，以便被引导到光检测器，从而获得光检测信号。

公开(公告)号：US06392970B1

公开(公告)日：2002-05-21

申请号：US09129191

申请日：1998-07-23

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

IPC分类号： G11B509

CPC分类号： G11B7/126 ,  G11B7/005 ,  G11B7/00745 ,  G11B11/10515 ,  G11B11/10584 ,  G11B11/10595

摘要： A reproducing light quantity control method for an optical memory device includes the steps of (1) recording test data on an optical recording medium; (2) reproducing the test data recorded on the optical recording medium by changing a reproducing light quantity in a plurality of light quantity values; (3) measuring a quality value and a signal quantity of each of a plurality of reproducing signals from the test data; (4) selecting an optimum reproducing signal quantity from a plurality of reproducing signal quantities in accordance with quality values of the plurality of reproducing signals so as to decide a target value of reproducing signal quantity; and (5) recording the target value on a target value recording region of the optical recording medium. This method reduces the time required to obtain a target value of a reproducing signal quantity and speeds up an operation from installing of the optical recording medium to finishing of preparation for recording and reproducing.

摘要翻译： 一种用于光学存储器件的再现光量控制方法包括以下步骤：（1）将测试数据记录在光学记录介质上; （2）通过改变多个光量值中的再现光量来再现记录在光记录介质上的测试数据; （3）从测试数据测量多个再现信号中的每一个的质量值和信号量; （4）根据多个再现信号的质量值从多个再现信号量中选择最佳再现信号量，以便确定再现信号量的目标值; 和（5）将目标值记录在光学记录介质的目标值记录区上。 该方法减少了获得再现信号量的目标值所需的时间，并且加快了从安装光学记录介质到完成记录和再现准备的操作。

公开(公告)号：US5446721A

公开(公告)日：1995-08-29

申请号：US138014

申请日：1993-10-19

申请人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

发明人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

IPC分类号： G11B7/09 ,  G02B7/02 ,  G11B7/00

CPC分类号： G11B7/0932

摘要： In an objective lens driving apparatus used in an optical information recording and reproducing apparatus or the like, a vibration is suppressed and a resonance peak on transfer function is suppressed when movable portions are moved in focusing and tracking directions and when these portions are turned around focusing and tracking directions. An elastic body which supports the movable portions movably in two directions, i.e., focusing direction and tracking direction to a fixed portion includes a bent portion in an intermediate portion between the side of movable portion and the side of fixed portion. A damper member is adhered to bridge a gap between a branched arm portion branching from a linear portion extending from the side of movable portion, and a fixed portion. The bent portion couples two linear portions and which are not on the same line.

摘要翻译： 在用于光信息记录和再现装置等的物镜驱动装置中，当可移动部分在聚焦和跟踪方向上移动时，并且当这些部分转向聚焦时，抑制振动并抑制传递函数上的共振峰值 和跟踪方向。 支撑可移动部分的弹性体在朝向固定部分的聚焦方向和跟踪方向的两个方向上可移动地包括在可动部分的侧面和固定部分侧之间的中间部分中的弯曲部分。 阻尼构件被粘接以桥接从从可动部分的侧面延伸的直线部分分支的分支臂部分与固定部分之间的间隙。 弯曲部分连接两个线性部分，并且不在同一条线上。

公开(公告)号：US5085496A

公开(公告)日：1992-02-04

申请号：US500292

申请日：1990-03-28

申请人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

发明人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

IPC分类号： G02B5/18 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1365 ,  G02B1/118 ,  G02B27/4261 ,  G02B27/4272 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1866 ,  G11B11/10543 ,  G11B7/1353

摘要： An optical element comprises a polarization diffraction element that is provided with diffraction gratings that are respectively mounted on different faces of a transparent substrate of a flat plate shape, which grating pitches are equal to each other and approximately equal to the wavelength of an incident light, and which grating lines are parallel. The thickness of the substrate is set such that the difference that occurs between the phases of the P and S polarizations of a light due to the grating, and the difference that occurs between the phases of the two polarizations when the light propagates through the substrate cancel out. The optical pickup device comprising the optical element includes a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zero-order diffracted light produced by the diffraction grating; and a second photodetector that is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate, and that receives a first-order diffracted light produced by the diffraction grating.

公开(公告)号：US5774428A

公开(公告)日：1998-06-30

申请号：US671898

申请日：1996-06-27

申请人： Tomoyuki Miyake ,  Nobuo Ogata ,  Kunio Kojima

发明人： Tomoyuki Miyake ,  Nobuo Ogata ,  Kunio Kojima

IPC分类号： G11B11/10 ,  G11B5/02 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10595 ,  G11B11/10508 ,  G11B11/10565

摘要： First, a recording magnetic field is generated by a magnetic head using a coil drive current a.sub.1, and a first data signal is recorded on a groove of a recording layer of a magneto-optical disk. Thereafter, similarly, a second data signal is recorded on the same groove as above by a coil drive current a.sub.2. In this case, the first and second data signals have different signal frequencies which do not overlap each other. The amplitude A.sub.1 of the coil drive current a.sub.1, is set greater than the amplitude A.sub.2 of the coil drive current a.sub.2. This arrangement permits multiple recording and increases the recording capacity of the magneto-optical disk.

摘要翻译： 首先，使用线圈驱动电流a1由磁头产生记录磁场，并且将第一数据信号记录在磁光盘的记录层的凹槽上。 此后，类似地，第二数据信号通过线圈驱动电流a2记录在与上述相同的槽上。 在这种情况下，第一和第二数据信号具有彼此不重叠的不同的信号频率。 线圈驱动电流a1的振幅A1被设定为大于线圈驱动电流a2的振幅A2。 这种布置允许多次记录并增加磁光盘的记录容量。

公开(公告)号：US06614720B1

公开(公告)日：2003-09-02

申请号：US09559515

申请日：2000-04-27

申请人： Nobuo Ogata ,  Chiaki Kiyooka ,  Makoto Horiyama ,  Kohji Minami ,  Takahiro Miyake ,  Yasuo Nakata

发明人： Nobuo Ogata ,  Chiaki Kiyooka ,  Makoto Horiyama ,  Kohji Minami ,  Takahiro Miyake ,  Yasuo Nakata

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1398

摘要： Beam shaping means may have a shaping ratio set to allow a light beam emitted from a semiconductor laser and having an elliptic intensity distribution to have an ellipticity of no more than two to obtain a spot achieving high light availability and reduced in size. Furthermore, the shaping ratio can be set to no more than 2.5 to allow a polalized-beam splitter (light separation means) and other components to be arranged in a converged flux passing between the semiconductor laser and a collimator lens.

摘要翻译： 光束成形装置可以具有设置成允许从半导体激光器发射的并且具有椭圆形强度分布的光束具有不大于2的椭圆率的成形比，以获得实现高光可用性并减小尺寸的光斑。 此外，成形比可以设定为不大于2.5，以允许在半导体激光器和准直透镜之间通过的会聚通量中布置有光束分束器（光分离装置）和其他部件。