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1. 发明授权

US07623419B2 Method and apparatus for measuring off-track detection sensitivity 有权
标题翻译：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。

2. 发明授权

US06934227B2 Optical disk device, semiconductor integrated circuit, pickup control method and vibration component detection method 失效
标题翻译：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。

3. 发明授权

US06502896B1 Backhoe 失效
标题翻译：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。

4. 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。

5. 发明授权

US5473470A Polarization detector 失效
标题翻译：极化探测器
公开(公告)号：US5473470A
公开(公告)日：1995-12-05
申请号：US093920
申请日：1993-07-21
申请人： Takahiro Miyake , Yoshio Yoshida , Yasuo Nakata , Yukio Kurata
发明人： Takahiro Miyake , Yoshio Yoshida , Yasuo Nakata , Yukio Kurata
IPC分类号： G01J4/04 , G02B5/18 , G02B5/30 , G02B27/28 , G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G01J4/04 , G02B27/283 , G02B5/1809 , G02B5/1814
摘要： A polarization detector includes a polarization diffraction element having a substrate with two facing surfaces which are placed in parallel with each other, a first diffraction grating formed on one surface of the substrate, and a second diffraction grating formed on the other surface of the substrate, with light being incident upon the first diffraction grating. Further, each grating pitch of the first diffraction grating and the second diffraction grating are nearly equal to a wavelength of the incident light. A limiting member is also included for limiting an incident region of the incident light with respect to the polarization diffraction element. The limiting member is formed on a light incident side of the first diffraction grating. Further, a converging lens is included for respectively converging light transmitted through the first diffraction grating and the second diffraction grating and light diffracted by the first diffraction grating and the second diffraction grating into different beam spots. Finally, a pair of photodetectors are included for detecting each optical intensity of the two beam spots converged by the converging lens.
摘要翻译：偏振检测器包括具有彼此平行放置的具有两个相对表面的基板的偏振衍射元件，形成在基板的一个表面上的第一衍射光栅和形成在基板的另一表面上的第二衍射光栅，光入射到第一衍射光栅上。此外，第一衍射光栅和第二衍射光栅的每个光栅间距几乎等于入射光的波长。还包括限制入射光相对于偏振衍射元件的入射区域的限制构件。限制部件形成在第一衍射光栅的光入射侧。此外，包括会聚透镜，用于分别会聚透过第一衍射光栅和第二衍射光栅的光以及由第一衍射光栅和第二衍射光栅衍射的光成为不同的光束点。最后，包括一对光检测器，用于检测由会聚透镜会聚的两束光束的每个光强度。

6. 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.

7. 发明授权

US4812638A Focusing error detector and optical data detecting device incorporating the focusing error detector 失效
标题翻译：聚焦误差检测器和结合了聚焦误差检测器的光学数据检测装置
公开(公告)号：US4812638A
公开(公告)日：1989-03-14
申请号：US78773
申请日：1987-07-28
申请人： Nobuo Ogata , Yasuo Nakata , Hideaki Satou , Toshiyuki Tanaka , Etsuji Minami , Yoshio Yoshida , Yukio Kurata , Teruaki Inoue, deceased
发明人： Nobuo Ogata , Yasuo Nakata , Hideaki Satou , Toshiyuki Tanaka , Etsuji Minami , Yoshio Yoshida , Yukio Kurata , Teruaki Inoue, deceased
IPC分类号： G11B7/09 , G11B7/135 , G01J1/20
CPC分类号： G11B7/22 , G11B7/0909 , G11B7/13922
摘要： A focusing error detector comprises a light source, a collimator lens for making parallel the pencil of rays emitted by the light source, an objective lens which focuses the parallel pencil of rays to form a beam spot on a data-recording disc with data tracks and guide tracks formed thereon and which receives the pencil of rays reflected from the data-recording disc, an optical system for forming a beam spot from the reflected pencil of rays incident to the objective lens, and an optical detector having a plurality of divided optical sensor blocks for receiving the formed beam spot so as to detect the focusing error of the beam spot formed on the data-recording disc on the basis of the configuration of the received beam spot.
摘要翻译：聚焦误差检测器包括光源，用于使平行于光源发射的光线的准直透镜，物镜，其将平行的光线聚焦以形成具有数据轨迹的数据记录盘上的光点，形成在其上的导轨，其接收从数据记录盘反射的光线，用于从入射到物镜的反射的射线形成束斑的光学系统;以及光学检测器，具有多个分开的光学传感器用于接收形成的光束点的块，以便根据接收的光束点的配置来检测形成在数据记录盘上的光束点的聚焦误差。

8. 发明授权

US4609065A Wheel drive structure for agricultural tractor 失效
标题翻译：农用拖拉机轮驱动结构
公开(公告)号：US4609065A
公开(公告)日：1986-09-02
申请号：US691772
申请日：1985-01-16
申请人： Hajime Shikiya , Hiroyuki Miki , Yasuo Nakata , Kazuo Hirata , Seiichi Ishiizumi
发明人： Hajime Shikiya , Hiroyuki Miki , Yasuo Nakata , Kazuo Hirata , Seiichi Ishiizumi
IPC分类号： B60K17/16 , B60K17/30 , F16H48/08
CPC分类号： B60K17/303 , Y10T74/2188
摘要： A wheel drive structure for an agricultural tractor comprising a drive case housing a differential mechanism and reduction mechanisms to transmit power from said differential mechanism to wheels. The drive case comprises first and second case portions and said first case portion is made of a structural steel pipe.
摘要翻译：一种用于农用拖拉机的轮驱动结构，包括容纳差速机构的驱动壳体和用于将动力从所述差速机构传递到车轮的减速机构。驱动箱包括第一和第二壳体部分，并且所述第一壳体部分由结构钢管制成。

9. 发明授权

US5940364A Optical disk including wobbled guiding groove composed of pits, optical disk manufacturing apparatus, and optical disk recording/reproducing apparatus 失效
标题翻译：包括由凹坑构成的摆动导向槽，光盘制造装置和光盘记录/再现装置的光盘
公开(公告)号：US5940364A
公开(公告)日：1999-08-17
申请号：US843699
申请日：1997-04-16
申请人： Nobuo Ogata , Yasuo Nakata , Yoshihiro Sekimoto
发明人： Nobuo Ogata , Yasuo Nakata , Yoshihiro Sekimoto
IPC分类号： G11B7/24 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/0055 , G11B7/007 , G11B7/013 , G11B7/09 , G11B7/125 , G11B7/135 , G11B7/30 , G11B11/10 , G11B11/105 , G11B13/00 , G11B19/28
CPC分类号： G11B7/24085 , G11B11/10597 , G11B19/28 , G11B7/0045 , G11B7/005 , G11B7/0079 , G11B7/126 , G11B7/24082 , G11B11/10584 , G11B7/00454
摘要： An optical disk having thereon intermittent spiral guiding grooves composed of a pit array, wherein each guiding groove has a wobbling side wall at either side, so that the pit array is used as a data reproduce-only area and spaces between adjacent guiding grooves are used as a data recordable area, thereby realizing a high-density optical disk having both the data reproduce-only area and data recordable area.
摘要翻译：具有由凹坑阵列组成的间歇螺旋导向槽的光盘，其中每个引导槽在任一侧具有摆动侧壁，使得凹坑阵列用作数据再现区域，并且使用相邻引导槽之间的间隔作为数据可记录区域，从而实现了具有数据再现区域和数据可记录区域两者的高密度光盘。

10. 发明授权

US5696742A Optical disk device for reproducing address information from wobbled groove 失效
标题翻译：用于从摆动槽再现地址信息的光盘装置
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。

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