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1. 发明授权

US06614720B1 Optical pickup device 失效
标题翻译：光学拾取装置
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。

2. 发明授权

US5085496A Optical element and optical pickup device comprising it 失效
标题翻译：光学元件和包含它的光学拾取器件
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.

3. 发明授权

US06687203B2 Optical recording medium, optical recording and reproducing device, and recording and reproducing method for the optical recording medium 失效
标题翻译：光学记录介质，光学记录和再现装置以及用于光学记录介质的记录和再现方法
公开(公告)号：US06687203B2
公开(公告)日：2004-02-03
申请号：US09954820
申请日：2001-09-18
申请人： Chiaki Kiyooka , Nobuo Ogata
发明人： Chiaki Kiyooka , Nobuo Ogata
IPC分类号： G11B700
CPC分类号： G11B7/24079 , G11B7/007 , G11B7/00718 , G11B7/00745 , G11B7/0938 , G11B7/24082 , G11B7/24085 , G11B11/10565 , G11B11/10578 , G11B27/19 , G11B27/24 , G11B2007/0006
摘要： In an optical recording medium, a groove G and/or a land L composing a recording track includes an interrupted portion of a predetermined length in a direction of the recording track, and the interrupted portion is a clock mark to obtain a clock signal. When (clock mark length C1)/(beam spot size D1)=CM, CM≦1.0. This reduces a region to record the control signal, thereby enabling high-density recording and reproduction, reproducing a control signal having a waveform free from distortion, and generating a clock signal in a state of little jitter.
摘要翻译：在光记录介质中，构成记录磁道的槽G和/或焊盘L在记录磁道的方向上包括预定长度的中断部分，并且中断部分是用于获得时钟信号的时钟标记。当（时钟标记长度C1）/（束斑大小D1）= CM时，CM <= 1.0。这减少了记录控制信号的区域，从而实现高密度记录和再现，再现具有无畸变波形的控制信号，并且产生抖动少的时钟信号。

4. 发明授权

US5050155A Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics 失效
$Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics$
标题翻译：拾取装置用于利用具有火焰特征的衍射光栅的光学信息记录系统
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.

5. 发明授权

US4849825A Pick-up device for use in an optical information recording system 失效
标题翻译：用于光学信息记录系统的拾取装置
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。

6. 发明授权

US06407968B1 Optical information recording/reproducing apparatus having focus error signal compensation 有权
标题翻译：具有聚焦误差信号补偿的光信息记录/重放装置
公开(公告)号：US06407968B1
公开(公告)日：2002-06-18
申请号：US09197663
申请日：1998-11-23
申请人： Yasuo Nakata , Hiroshi Fuji , Nobuo Ogata
发明人： Yasuo Nakata , Hiroshi Fuji , Nobuo Ogata
IPC分类号： G11B700
CPC分类号： G11B7/0909 , G11B7/00718 , G11B7/094 , G11B7/0945
摘要： A light spot detects a focus offset amount based on an amount of variation of a focus error signal when a light spot passes a boundary between a land section and a groove section adjacent to the land section on an optical disk. Specifically, an amount of variations in the focus error signal at a center of a land section at a time the light spot passes the boundary between the land and the groove adjacent to the land is detected as a focus offset amount, and an amount of variation in the focus error signal at a center of the groove section is detected as a focus offset amount for the groove sections, thereby providing an optical information recording/reproducing device which permits recording/reproducing information on and from a tracking area of an optical disk under just-in-focus conditions without increasing a cost of the device nor being affected by an error due to changes over time or variations in optical disks.
摘要翻译：当光点通过在光盘上与岸台部分相邻的岸台部分和槽部分之间的边界时，光点基于聚焦误差信号的变化量来检测聚焦偏移量。具体地，作为焦点偏移量，检测在光点通过了与岸台相邻的槽脊与槽之间的边界的岸台部的中心处的聚焦误差信号的变化量，变化量在凹槽部分的中心处的聚焦误差信号被检测为凹槽部分的聚焦偏移量，从而提供允许在光盘的跟踪区域上记录/再现信息的光学信息记录/再现装置即时聚焦条件，而不会增加设备的成本，也不会受到随时间的变化或光盘变化的错误的影响。

7. 发明授权

US06392970B1 Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium 失效
标题翻译：再现光存储装置的光量控制方法，再现光量控制装置和光记录介质
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。

8. 发明授权

US5673247A Optical pickup having two objective lenses 失效
标题翻译：具有两个物镜的光学拾取器
公开(公告)号：US5673247A
公开(公告)日：1997-09-30
申请号：US758010
申请日：1996-11-27
申请人： Yoshihiro Sekimoto , Yasuo Nakata , Nobuo Ogata , Tomoyuki Miyake
发明人： Yoshihiro Sekimoto , Yasuo Nakata , Nobuo Ogata , Tomoyuki Miyake
IPC分类号： G11B7/00 , G11B7/0037 , G11B7/135 , G11B11/105
CPC分类号： G11B7/1374 , G11B11/10543 , G11B7/1365 , G11B7/1369 , G11B7/139 , G11B2007/0006
摘要： An optical pickup for irradiating a first recording medium and a second recording medium with light, at least one of the substrate thickness and the refractive index of the first recording medium being different from that of the second recording medium, where the optical pickup includes: a light source for emitting the light; a polarized beam splitter for receiving the light and for transmitting at least a portion of the light while reflecting the remaining portion of the light depending on the polarization direction of the light; a first objective lens for focusing the portion of the light reflected by the polarized beam splitter onto the first recording medium; and a second objective lens for focusing the portion of the light transmitted through the polarized beam splitter onto the second recording medium.
摘要翻译：一种用于用光照射第一记录介质和第二记录介质的光学拾取器，所述第一记录介质的基板厚度和折射率中的至少一个与所述第二记录介质的折射率不同，其中所述光学拾取器包括：用于发光的光源; 偏振分束器，用于接收光并用于透射至少一部分光，同时根据光的偏振方向反射光的剩余部分; 用于将由偏振分束器反射的光的一部分聚焦到第一记录介质上的第一物镜; 以及用于将透射通过偏振分束器的光的一部分聚焦到第二记录介质上的第二物镜。

9. 发明授权

US5446721A Objective lens drive device with support system 失效
标题翻译：物镜驱动装置带支撑系统
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。

10. 发明授权

US5999502A Optical information recording/reproducing apparatus having focus servo control compensation for lands and grooves 失效
标题翻译：具有用于焊盘和凹槽的聚焦伺服控制补偿的光学信息记录/再现装置
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。

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