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51 条记录 (耗时 0.027 秒)

    Pick-up device for use in an optical information recording system
    13.
    发明授权
    Pick-up device for use in an optical information recording system 失效
    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。

    Optical pickup device
    14.
    发明授权
    Optical pickup device 失效
    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。

    Hologram laser unit and optical pickup device including the same
    15.
    发明授权
    Hologram laser unit and optical pickup device including the same 失效
    全息激光单元和包括其的光学拾取装置

    公开(公告)号：US06388977B1

    公开(公告)日：2002-05-14

    申请号：US09334173

    申请日：1999-06-15

    申请人： Keiji Sakai ,  Yasuo Nakata

    发明人： Keiji Sakai ,  Yasuo Nakata

    IPC分类号： G11B700

    CPC分类号： G11B7/1381 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

    摘要： A hologram laser unit to be used for performing recording and reproducing operations of information for an optical disk, includes a light source, a photodetector, and a hologram element which are formed integrally with each other. The hologram element includes: a first hologram for detecting information signals from the optical disk, the first hologram being provided in an area having an effective diameter corresponding to a numerical aperture suitable for the optical disk; and a second hologram for compensating for only a transmitted light amount of light traveling toward the optical disk from the light source, the second hologram being provided contiguously outside the first hologram.

    摘要翻译： 用于执行光盘信息的记录和再现操作的全息激光单元包括彼此一体地形成的光源，光电检测器和全息元件。 全息元件包括：用于检测来自光盘的信息信号的第一全息图，第一全息图设置在具有对应于适合于光盘的数值孔径的有效直径的区域中; 以及第二全息图，用于仅补偿从光源朝向光盘传播的光的透射光量，第二全息图连续地设置在第一全息图之外。

    Method and apparatus for measuring off-track detection sensitivity
    16.
    发明授权
    Method and apparatus for measuring off-track detection sensitivity 有权
    用于测量离轨检测灵敏度的方法和装置

    公开(公告)号：US07623419B2

    公开(公告)日：2009-11-24

    申请号：US10768623

    申请日：2004-01-30

    申请人： Yasuo Nakata

    发明人： Yasuo Nakata

    IPC分类号： G11B7/085

    CPC分类号： G11B7/00375 ,  G11B7/002 ,  G11B7/08517 ,  G11B7/0946

    摘要： An off-track duty measurement unit measures off-track detection sensitivity on the basis of an off-track signal, and track cross cycle information that is obtained from a tracking error signal measured by a track cross cycle measurement unit, whereby off-track detection sensitivity can be measured more accurately. Further, an off-track detection sensitivity controller changes the detection sensitivity of an off-track signal detector according to the obtained off-track detection sensitivity, whereby the off-track sensitivity can be kept constant for various kinds of discs, and accordingly, stabilities of off-track detection, track pull-in judgement, and track jumping can be secured.

    摘要翻译： 离轨占空比测量单元基于偏离轨道信号来测量偏离轨迹检测灵敏度，并且跟踪由轨道交叉循环测量单元测量的跟踪误差信号获得的交叉循环信息，由此进行离轨检测 灵敏度可以更准确地测量。 此外，偏离磁道检测灵敏度控制器根据获得的偏离磁道检测灵敏度改变偏离磁道信号检测器的检测灵敏度，从而可以使各种光盘的偏离磁道灵敏度保持不变，因此，稳定性 可以确保偏离轨迹检测，轨迹拉入判断和轨道跳跃。

    Optical disk device, semiconductor integrated circuit, pickup control method and vibration component detection method
    17.
    发明授权
    Optical disk device, semiconductor integrated circuit, pickup control method and vibration component detection method 失效
    光盘装置，半导体集成电路，拾取控制方法和振动分量检测方法

    公开(公告)号：US06934227B2

    公开(公告)日：2005-08-23

    申请号：US10231160

    申请日：2002-08-30

    申请人： Yasuo Nakata ,  Masanori Harui

    发明人： Yasuo Nakata ,  Masanori Harui

    IPC分类号： G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/0946 ,  G11B7/0908

    摘要： To increase the vibration resistance of an optical disk device with respect to vibrations in the focus direction. More specifically, an optical disk device is provided with a multiplication means for generating a focus vibration component FC from the focus error signal FE, a multiplication means for generating a tracking vibration component TC from the tracking error signal TE, an adder for adding the focus vibration components FC and TC, and a low-pass filter for extracting the vibration component VC from the added results. Thus, the vibration component VC is extracted considering not only vibrations in the tracking direction but also vibrations in the focus direction, so that vibrations acting on the device can be more accurately detected, and vibration resistance is increased.

    摘要翻译： 相对于聚焦方向上的振动增加光盘装置的抗振性。 更具体地说，光盘装置设置有用于从聚焦误差信号FE产生聚焦振动分量FC的乘法装置，用于从跟踪误差信号TE产生跟踪振动分量TC的乘法装置，用于将焦点相加的加法器 振动分量FC和TC，以及用于从附加结果中提取振动分量VC的低通滤波器。 因此，不仅考虑跟踪方向上的振动，而且考虑聚焦方向的振动，提取振动分量VC，从而可以更精确地检测作用在装置上的振动，并且提高抗振性。

    Backhoe
    18.
    发明授权
    Backhoe 失效
    反铲

    公开(公告)号：US06502896B1

    公开(公告)日：2003-01-07

    申请号：US09653723

    申请日：2000-09-01

    申请人： Yasuo Nakata ,  Yoshitaka Matsubara ,  Kenji Ikeda ,  Kenzo Koga ,  Teruo Kunizawa ,  Tomoaki Miyake

    发明人： Yasuo Nakata ,  Yoshitaka Matsubara ,  Kenji Ikeda ,  Kenzo Koga ,  Teruo Kunizawa ,  Tomoaki Miyake

    IPC分类号： B60R2700

    CPC分类号： B60J5/0487 ,  E02F9/163 ,  Y10T16/531 ,  Y10T16/554 ,  Y10T16/557 ,  Y10T16/558 ,  Y10T16/5595

    摘要： A backhoe (1) includes an upper structure (3) supported by a traveling device (2) to be rotatable about a vertical swivel axis (X). The upper structure (3) carries an excavator (4) and a cab (12) and has a rear edge (3A) formed arcuate about the swivel axis (X) in plan view. The cab (12) defines an opening (31) with a door (32) attached through hinges (34). The door (32) is pivotable about a vertical open/close axis (Y) of hinges (34). The hinges (34) are arranged on a rear edge opening (31). Each hinge (34) includes a pair of hinges (34A and 34B) which are bent to place the axis (Y) forwardly of the rear end of door (32). Consequently, when the door (32) is set to a fully open position, the free end of door (32) is displaced to a position forwardly of the rear edge (3A) of upper structure (3).

    摘要翻译： 反铲（1）包括由行走装置（2）支撑的上部结构（3），以可围绕垂直旋转轴线（X）旋转。 上部结构（3）承载挖掘机（4）和驾驶室（12），并且在俯视图中具有绕旋转轴线（X）弓形地形成的后边缘（3A）。 驾驶室（12）限定了具有通过铰链（34）连接的门（32）的开口（31）。 门（32）可围绕铰链（34）的垂直打开/关闭轴线（Y）枢转。 铰链（34）布置在后边缘开口（31）上。 每个铰链（34）包括一对铰链（34A和34B），其被弯曲以将轴线（Y）放置在门（32）的后端的前方。 因此，当门（32）设定为完全打开位置时，门（32）的自由端位移到上部结构（3）的后边缘（3A）的前方位置。

    Optical information recording/reproducing apparatus having focus servo control compensation for lands and grooves
    19.
    发明授权
    Optical information recording/reproducing apparatus having focus servo control compensation for lands and grooves 失效
    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 。