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1. 发明申请

US20070053270A1 Optical pickup device recording and/or reproducing information on and/or from a plurality of kinds of recording media 有权
标题翻译：光拾取装置在多种记录介质上记录和/或再现信息
公开(公告)号：US20070053270A1
公开(公告)日：2007-03-08
申请号：US11495907
申请日：2006-07-28
申请人： Tetsuo Ueyama , Osamu Miyazaki , Yukio Watanabe , Yasuo Nakata , Tomio Mashiyama
发明人： Tetsuo Ueyama , Osamu Miyazaki , Yukio Watanabe , Yasuo Nakata , Tomio Mashiyama
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903
摘要： An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.
摘要翻译：光学拾取装置具有发射光的半导体激光器，该半导体激光器又通过衍射光栅分支成至少三束光束，所述至少三束光包括主光束和两个子光束，所述至少三个光束又通过物镜在光盘上以引导凹槽并由光盘反射以提供三次反射的光，这些反射又被检测器接收，每个被分成两个区域以产生跟踪误差信号。衍射光栅分为三个区域，包括第一区域，第二区域和位于其间的第三区域，每个区域具有异相的周期性结构，该周期结构具有根据第二区域的相位确定的方向的光栅槽区域相对于垂直于光盘的引导槽的方向倾斜。

2. 发明授权

US07990834B2 Optical pickup device recording and/or reproducing information on and/or from a plurality of kinds of recording media 有权
标题翻译：光拾取装置在多种记录介质上记录和/或再现信息
公开(公告)号：US07990834B2
公开(公告)日：2011-08-02
申请号：US11495907
申请日：2006-07-28
申请人： Tetsuo Ueyama , Osamu Miyazaki , Yukio Watanabe , Yasuo Nakata , Tomio Mashiyama
发明人： Tetsuo Ueyama , Osamu Miyazaki , Yukio Watanabe , Yasuo Nakata , Tomio Mashiyama
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903
摘要： An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.
摘要翻译：光学拾取装置具有发射光的半导体激光器，该半导体激光器又通过衍射光栅分支成至少三束光束，所述至少三束光包括主光束和两个子光束，所述至少三个光束又通过物镜在光盘上以引导凹槽并由光盘反射以提供三次反射的光，这些反射又被检测器接收，每个被分成两个区域以产生跟踪误差信号。衍射光栅分为三个区域，包括第一区域，第二区域和位于其间的第三区域，每个区域具有异相的周期性结构，该周期结构具有根据第二区域的相位确定的方向的光栅槽区域相对于垂直于光盘的引导槽的方向倾斜。

3. 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.

4. 发明授权

US07397752B2 Pickup for magneto-optical recording medium 失效
标题翻译：拾音器用于磁光记录介质
公开(公告)号：US07397752B2
公开(公告)日：2008-07-08
申请号：US10846282
申请日：2004-05-14
申请人： Tetsuo Ueyama , Kohji Minami , Tomoyuki Miyake , Yasuo Nakata
发明人： Tetsuo Ueyama , Kohji Minami , Tomoyuki Miyake , Yasuo Nakata
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/1365 , G11B11/10545 , G11B11/10597 , G11B2007/0006
摘要： A pickup for a magneto-optical recording medium is provided, which improves quality of reproduced signals by eliminating a phase difference between the polarizations and is capable of coping with magneto-optical recording media of different recording/reproducing systems. A return light beam of light reflected by a magneto-optical recording medium is polarized and separated into ± first-order diffracted lights through a light-branching diffraction element provided between a light source and an objective lens. The ± first-order diffracted lights are compensated for their phases through first and second phase compensation elements so that there is no phase difference between the polarizations, and are, further, polarized and separated through the first and second polarization/separation elements, and are received by first and second light detectors. Use of the first and second phase compensation elements having different phase compensation amounts makes it possible to cope with the magneto-optical recording media of different recording/reproducing systems.
摘要翻译：提供了一种用于磁光记录介质的拾取器，其通过消除极化之间的相位差来提高再现信号的质量，并且能够应对不同记录/再现系统的磁光记录介质。由磁光记录介质反射的返回光束被偏振并通过设置在光源和物镜之间的光分支衍射元件分离为±一级衍射光。 ±一级衍射光通过第一和第二相位补偿元件对其相位进行补偿，使得在极化之间不存在相位差，并且还通过第一和第二偏振/分离元件偏振和分离，并且由第一和第二光检测器接收。使用具有不同相位补偿量的第一和第二相位补偿元件使得可以应对不同记录/再现系统的磁光记录介质。

5. 发明申请

US20080117789A1 OPTICAL PICKUP DEVICE 审中-公开
标题翻译：光学拾取器件
公开(公告)号：US20080117789A1
公开(公告)日：2008-05-22
申请号：US11940796
申请日：2007-11-15
申请人： Taizoh Yokota , Osamu Miyazaki , Yasuo Nakata
发明人： Taizoh Yokota , Osamu Miyazaki , Yasuo Nakata
IPC分类号： G11B7/135 , G11B7/00
CPC分类号： G11B7/1376 , G11B7/1365 , G11B7/1374 , G11B7/13925 , G11B7/1395 , G11B2007/0006
摘要： In the optical pickup device, a luminous flux emitted from a blue-violet laser as S wave to a blue-violet PBS, passes through a half-wave plate, and is reflected by the blue-violet PBS and a total reflection mirror, before being applied to a BD disc via an objective lens. Luminous fluxes, which were emitted respectively from an infrared laser emitting device and a red laser emitting device and were reflected respectively by infrared and red PBSs, among aligned infrared, red and blue-violets PBSs, before reaching the blue-violet PBS, are reflected by the blue-violet PBS. The luminous fluxes emitted from the blue-violet laser emitting device as P waves pass the blue-violet PBS, and are respectively applied to a CD disc, a DVD disc, or a HD-DVD disc via an diffractive object lens. Thus, it becomes possible to write or read access to four kinds of discs with three wavelengths.
摘要翻译：在光拾取装置中，从蓝紫激光作为S波向蓝紫色PBS发射的光束通过半波片，并在蓝紫色PBS和全反射镜之前反射，之前通过物镜应用于BD盘。分别从红外激光发射装置和红色激光发射装置分别发射的红光和红色PBS在对准的红外线，红色和蓝紫罗兰PBS中的光通量在达到蓝紫色PBS之前被反射由蓝紫色PBS。从蓝紫色激光发射装置发出的光通量为P波通过蓝紫色PBS，分别通过衍射物镜施加到CD盘，DVD盘或HD-DVD盘。因此，可以对具有三个波长的四种盘进行写入或读取。

6. 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。

7. 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。

8. 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。

9. 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。

10. 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。

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