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21. 发明申请

US20100220576A1 OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCTION DEVICE 审中-公开
标题翻译：光学拾取装置和信息记录/再现装置
公开(公告)号：US20100220576A1
公开(公告)日：2010-09-02
申请号：US11993121
申请日：2006-06-13
申请人： Ikuya Kikuchi , Masakazu Ogasawara , Takuma Yanagisawa
发明人： Ikuya Kikuchi , Masakazu Ogasawara , Takuma Yanagisawa
IPC分类号： G11B7/135
CPC分类号： G11B7/0901 , G11B7/0906 , G11B7/1353 , G11B7/1381
摘要： The present invention makes possible a compact optical pickup device that eliminates effects due to the position where a sub beam is projected during tracking compensation, and provides for stable tracking compensation.A diffraction grating 12 in the optical pickup device PU gives an astigmatism to a sub beam (either of ±1-dimensional light), and shines that sub beam onto an optical disc DK. Also, a tracking error signal Ste is obtained by subtracting a push-pull signal PPsub that corresponds to a sub beam from a push-pull signal PPmain that corresponds to a main beam (0-dimensional light), and tracking compensation is performed based on that tracking error signal Ste.
摘要翻译：本发明使得可以消除由于在跟踪补偿期间投影子光束的位置而产生的影响的紧凑型光学拾取装置，并提供稳定的跟踪补偿。光学拾取装置PU中的衍射光栅12给子光束（±1维光）的散光，并将该子光束照射到光盘DK上。此外，通过从对应于主波束（0维光）的推挽信号PPmain中减去与子波对应的推挽信号PPsub来获得跟踪误差信号Ste，并且基于跟踪误差信号Ste。

22. 发明申请

US20090201787A1 PICKUP DEVICE 失效
标题翻译：扒手装置
公开(公告)号：US20090201787A1
公开(公告)日：2009-08-13
申请号：US12307853
申请日：2007-07-13
申请人： Masakazu Ogasawara , Takuma Yanagisawa , Katsuhiro Koike
发明人： Masakazu Ogasawara , Takuma Yanagisawa , Katsuhiro Koike
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0909 , G11B7/131 , G11B7/133 , G11B7/1378 , G11B2007/0013
摘要： A pickup device includes an irradiation optical system including an object lens for focusing light flux on a track of a recording surface of an optical recording media having a plurality of recording layers stacked while a spacer layer is interposed between the recording layers to form a spot and a detection optical system including an photo detector having a plurality of light receiving parts for receiving returning light reflected from the spot through the object lens to perform photoelectric conversion. The pickup device controls a position of the object leans according to an electrical signal calculated from outputs of the light receiving parts. The pickup device further includes an astigmatic device for providing astigmatism to the returning light directed to the light receiving parts and a division device, having divisional regions divided by a division line extending in an astigmatic direction about an optical axis of the returning light, for dividing the returning light having the astigmatism into a plurality of partial light fluxes divided for the respective divisional regions along the optical axis of returning light. The neighboring divisional regions provide the partial light fluxes with an optical action so that interference between the corresponding partial light fluxes does not occur on the light receiving parts.
摘要翻译：拾取装置包括：照射光学系统，包括用于将光束聚焦在具有堆叠的多个记录层的光学记录介质的记录表面的轨道上的物镜，同时隔离层插入在记录层之间以形成点，一种检测光学系统，包括具有多个光接收部分的光检测器，用于接收通过物镜从该点反射的返回光，以执行光电转换。拾取装置根据从光接收部分的输出计算的电信号来控制物体倾斜的位置。拾取装置还包括用于向指向光接收部分的返回光提供像散的像散装置和分割装置，该分割装置具有被围绕返回光的光轴沿像散方向延伸的分割线划分的分割区域，用于分割将具有像散的返回光分离成沿着返回光的光轴分割成各分区的多个部分光束。相邻分割区域提供具有光学作用的部分光束，使得在光接收部分上不发生对应的部分光束之间的干涉。

23. 发明申请

US20050276175A1 Focus servo device 失效
标题翻译：聚焦伺服装置
公开(公告)号：US20050276175A1
公开(公告)日：2005-12-15
申请号：US11145754
申请日：2003-06-24
申请人： Akinori Ohkubo , Takuma Yanagisawa
发明人： Akinori Ohkubo , Takuma Yanagisawa
IPC分类号： G11B11/00 , G11B7/085 , G11B7/09 , G11B7/00
CPC分类号： G11B7/08511
摘要： A focus servo device is for focusing a light irradiated from a light source onto a recording medium surface via an objective lens. Assuming that a wavelength of the light is λ, a numerical aperture of the objective lens is NA, an average run length period of the recording medium standardized with λ/NA is RL, the track pitch standardized with λ/NA is TP, and the capture range of said focus servo device is CR [μm], the following equation applies: 0.114/(RL−0.72)+0.84≦CR≦18000(TP−0.69)5+3.13.
摘要翻译：聚焦伺服装置用于通过物镜将从光源照射的光聚焦到记录介质表面上。假设光的波长为λ，则物镜的数值孔径为NA，以λ/ NA标准化的记录介质的平均游程长度周期为RL，用λ/ NA标准化的轨道间距为TP，并且所述聚焦伺服装置的捕获范围为CR [mum]，下列公式适用：<？in-line-formula description =“In-line formula”end =“lead”？> 0.114 /（RL-0.72）+0.84 < = CR <= 18000（TP-0.69）5 +3.13。 <？in-line-formula description =“内联公式”end =“tail”？>

24. 发明授权

US06563773B1 Tracking control apparatus 失效
标题翻译：跟踪控制装置
公开(公告)号：US06563773B1
公开(公告)日：2003-05-13
申请号：US09664409
申请日：2000-09-18
申请人： Takuma Yanagisawa , Hiroki Kuribayashi
发明人： Takuma Yanagisawa , Hiroki Kuribayashi
IPC分类号： G11B700
CPC分类号： G11B7/0901 , G11B7/00718 , G11B7/094
摘要： A disc has a physical factor changing a shape or a reflection coefficient in a tangential direction of a record track. A tracking control apparatus for the disc is provided with a detecting device having a first detector, a second detector disposed adjacent to the first detector in a radial direction of the disc, a third detector disposed adjacent to the second detector in the tangential direction and a fourth detector disposed adjacent to the first detector in the tangential direction and adjacent to the third detector in the radial direction; a first amplifying device for amplifying output signals of the first and fourth detectors by a first gain; a second amplifying device for amplifying output signals of the second and third detectors by a second gain; a first adding device for calculating a first sum signal, which is a sum of the amplified output signals of the first and fourth detectors; a second adding device for calculating a second sum signal, which is a sum of the amplified output signals of the second and third detectors; and a first subtracting device for calculating a difference between the first an second sum signals and outputting the difference as a tracking error signal. The tracking control apparatus is also provided with an amplitude comparing device for determining the first gain and the second gain on the basis of differences between the output signals.
摘要翻译：盘具有改变记录轨道的切线方向上的形状或反射系数的物理因子。一种用于盘的跟踪控制装置设置有检测装置，该检测装置具有第一检测器，在盘的径向方向上与第一检测器相邻设置的第二检测器，在切向方向上与第二检测器相邻设置的第三检测器，第四检测器，沿着切线方向邻近第一检测器设置，并且在径向方向上与第三检测器相邻; 第一放大装置，用于通过第一增益放大第一和第四检测器的输出信号; 第二放大装置，用于通过第二增益来放大第二和第三检测器的输出信号; 第一加法装置，用于计算第一和信号，其是第一和第四检测器的放大的输出信号的和; 第二加法装置，用于计算作为第二和第三检测器的放大输出信号之和的第二和信号; 以及第一减法装置，用于计算第一和第二和信号之间的差并输出该差作为跟踪误差信号。跟踪控制装置还设置有基于输出信号之间的差异来确定第一增益和第二增益的幅度比较装置。

25. 发明授权

US5546372A Information detection light intensity control apparatus in optical disc recorded-information reproducing apparatus 失效
标题翻译：光盘记录信息再现装置中的信息检测光强度控制装置
公开(公告)号：US5546372A
公开(公告)日：1996-08-13
申请号：US255173
申请日：1994-06-07
申请人： Seiichi Ohsawa , Takuma Yanagisawa
发明人： Seiichi Ohsawa , Takuma Yanagisawa
IPC分类号： G11B7/00 , G11B7/005 , G11B7/125
CPC分类号： G11B7/126
摘要： An information detection light intensity control apparatus in an apparatus reproducing information recorded in an optical disc in which a reflectance has a dependency on an incident light intensity, comprising a light source for emitting an information detection light which enters the optical disc and a control system for controlling an intensity of the information detection light which enters the optical disc so that a ratio of an intensity of the information detection light which enters the optical disc and an intensity of the information detection light reflected from the optical disc is set to a predetermined value. According to the information detection light intensity control apparatus, a spot head value of the information detection light is held to the optimum value by coping with an aberration of a fluctuation such as disc tilt, disc thickness variation, or the like or with a sensitivity fluctuation of a super resolution film so that the information recorded in the super resolution optical disc can be stably reproduced.
摘要翻译：一种信息检测光强度控制装置，用于再现记录在其中反射率对入射光强度具有依赖性的光盘中的信息，包括用于发射进入光盘的信息检测光的光源和用于控制进入光盘的信息检测光的强度，使得进入光盘的信息检测光的强度与从光盘反射的信息检测光的强度的比率被设定为预定值。根据信息检测光强度控制装置，信息检测光的光斑值通过应对诸如光盘倾斜，光盘厚度变化等的波动的像差或者具有灵敏度波动而被保持为最佳值使得能够稳定地再现记录在超分辨率光盘中的信息。

26. 发明授权

US07821899B2 Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US07821899B2
公开(公告)日：2010-10-26
申请号：US11996430
申请日：2006-07-03
申请人： Takuma Yanagisawa , Masakazu Ogasawara
发明人： Takuma Yanagisawa , Masakazu Ogasawara
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/094 , G11B7/1353
摘要： The present invention provides an optical pickup device requiring no position adjustment of a diffraction grating at the time of assembling the optical pickup device, and capable of suppressing fluctuations in a differential push-pull signal amplitude and cancelling a push-pull offset.An optical pickup device 200 of an embodiment of the present invention has a diffraction grating 230 of a special shape including predetermined grooves and two kinds of lattice grooves arranged at a pitch determined on the basis of a pitch of grooves formed in the surface of an optical disk 50, numerical aperture, wavelength of a light beam, and effective diameter of the light beam applied on the optical disk 50. To suppress push-pull signals generated in the ± first-order diffraction rays, reflection rays from the optical disk 50 of a zeroth-order diffraction ray and ± first-order diffraction rays are detected, and signals corresponding to light reception results are output to a reproduction unit 150, a control unit 130, and an actuator servo circuit 140.
摘要翻译：本发明提供了一种在组装光学拾取装置时不需要对衍射光栅进行位置调整并且能够抑制差分推挽信号振幅的波动并取消推挽偏移的光学拾取装置。本发明实施例的光学拾取装置200具有特殊形状的衍射光栅230，该衍射光栅230包括预定的凹槽和两个格栅槽，它们以基于在光学器件表面形成的凹槽的间距所确定的间距盘50，数值孔径，光束波长和施加在光盘50上的光束的有效直径。为了抑制在±一级衍射光线中产生的推挽信号，来自光盘50的反射光线检测到零级衍射线和±一级衍射线，并且将对应于光接收结果的信号输出到再现单元150，控制单元130和致动器伺服电路140。

27. 发明申请

US20090073825A1 Optical pick-up, aberration correcting method, optical pickup program, information recording device and method, information recording program, information reproducing device and method, information reproducing program, and information recording medium 审中-公开
标题翻译：光学拾取，像差校正方法，光学拾取程序，信息记录装置和方法，信息记录程序，信息再现装置和方法，信息再现程序和信息记录介质
公开(公告)号：US20090073825A1
公开(公告)日：2009-03-19
申请号：US11918886
申请日：2006-03-27
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/1369 , G11B2007/0006
摘要： The invention is to provide an optical pickup capable of performing a track search operation accurately by reducing noise occurring in a focus servo system during the track search operation and also accurately recording/reproducing information to/from an optical disk.An optical pickup PU for emitting a light beam B to an optical disk DK in which recording tracks having a land/groove structure are formed and receiving reflection light of the emitted light beam B, has: a liquid crystal panel 3 for correcting astigmatism included in light beam B by a cause peculiar to an optical system as a component of the optical pickup PU in a state where tracking servo is on, and correcting the astigmatism and a fundamental track crossing noise in a state where the tracking servo is off, and a liquid crystal panel control unit 8 for operating a liquid crystal panel 3 while making a switch in accordance with the state of the tracking servo.
摘要翻译：本发明提供一种光拾取器，其能够通过减少在轨道搜索操作期间在聚焦伺服系统中发生的噪声并且还准确地向/从光盘记录/再现信息来精确地执行轨道搜索操作。用于将光束B发射到其中形成有具有焊盘/凹槽结构的记录磁道并且接收发射光束B的反射光的光盘B的光学拾取器PU具有：用于校正包括在其中的散光的液晶面板3 在跟踪伺服处于打开的状态下作为光学拾取器PU的组件的光学系统特有的原因的光束B，以及在跟踪伺服关闭的状态下校正像散和基本轨道交叉噪声，以及液晶面板控制单元8，用于在根据跟踪伺服的状态进行开关的同时操作液晶面板3。

28. 发明授权

US07206277B2 Optical pickup device and focal error detecting device therefor and wave aberration and focal error detecting device therefor 失效
标题翻译：光拾取装置及其焦点误差检测装置及其波像和焦点误差检测装置
公开(公告)号：US07206277B2
公开(公告)日：2007-04-17
申请号：US10199706
申请日：2002-07-22
申请人： Masakazu Ogasawara , Takuma Yanagisawa
发明人： Masakazu Ogasawara , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/1395 , G11B7/0909 , G11B7/0912 , G11B7/131 , G11B7/133 , G11B7/1378 , G11B7/1381 , G11B7/13927 , G11B2007/0013
摘要： An optical pickup device includes an irradiating optical system for converging a light beam to form a spot on a recording surface via a light-transmitting layer of an optical recording medium, and a photodetection optical system for converging return light reflected and returned from the spot on a photodetector. The device detects wave aberration and focal error of the light beam. A diffractive optical element is disposed on the optical axis of return light in the photodetection optical system and provided with an annulus. The diffractive optical element annularly extracts, from return light, ray components in the vicinity of a predetermined radius on a pupil on the emitting pupil surface of the irradiating optical system, which is affected by the wave aberration generated in the optical system. The photodetector contains first light receiving components for receiving the ray components transmitted and extracted by the annulus, and second light receiving components for receiving at least some of the ray components other than the ray components transmitted by the annulus. The device further includes a focal error detecting circuit connected to the first light receiving components and which detects the focal error of the light beam on the basis of a subsequent photoelectrically converted output. The device may include a wave aberration error detecting circuit connected to the second light receiving components and which detects the wave aberration of the light beam on the basis of a subsequent photoelectrically converted output.
摘要翻译：一种光学拾取装置，包括：照射光学系统，用于会聚光束，以经由光记录介质的透光层在记录表面上形成点;以及光电检测光学系统，用于会聚从该点反射和返回的返回光光检测器。该装置检测光束的波像差和焦点误差。衍射光学元件设置在光检测光学系统中的返回光的光轴上并且设置有环形空间。衍射光学元件从返回光环境地提取受光学系统中产生的波像影响的照射光学系统的发射光瞳表面上的光瞳附近的预定半径附近的光线分量。光电检测器包括用于接收由环带传输和提取的光线分量的第一光接收部件，以及用于接收由环带传输的光线分量以外的至少一些光线分量的第二光接收部件。该装置还包括连接到第一光接收部件并根据随后的光电转换输出来检测光束的焦点误差的焦点误差检测电路。该装置可以包括连接到第二光接收部件并根据随后的光电转换输出来检测光束的波像差的波形像差误差检测电路。

29. 发明授权

US07142498B2 Recorded information reproducing apparatus 失效
公开(公告)号：US07142498B2
公开(公告)日：2006-11-28
申请号：US10440376
申请日：2003-05-19
申请人： Hiroki Kuribayashi , Takuma Yanagisawa
发明人： Hiroki Kuribayashi , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/005
摘要： It is an object to provide a recorded information reproducing apparatus that allows to eliminate crosstalk from an adjacent track correctly, even from a recording medium having both a recorded area in which information data are recorded and an unrecorded area. In order to detect a crosstalk component from an adjacent track based on a correlation between a main read signal read from a main track and a sub read signal read from an adjacent track, the relative phase between the sub read signal and the main read signal is shifted.

30. 发明授权

US06590857B2 Optical disk 失效
公开(公告)号：US06590857B2
公开(公告)日：2003-07-08
申请号：US09985953
申请日：2001-11-06
申请人： Akinori Ohkubo , Takuma Yanagisawa , Takayuki Nomoto
发明人： Akinori Ohkubo , Takuma Yanagisawa , Takayuki Nomoto
IPC分类号： G11B724
CPC分类号： G11B7/24079
摘要： An optical disk has a recording layer recording information as a row of marks and non-marks alternately appearing in a groove formed at a track pitch of 0.280 &mgr;m or greater and a light transmissive layer formed over the recording layer, to reproduce information due to a light beam having a wavelength in a range of 375 nm to 415 nm and illuminated by an objective lens having a numerical aperture NA in a range of 0.80 to 0.90 through the light transmissive layer to the recording layer. The groove has a depth in a range of 18 nm to 32 nm.

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