专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06721242B2 Optical detector having three light receiving areas 有权
标题翻译：具有三个光接收区域的光学检测器
公开(公告)号：US06721242B2
公开(公告)日：2004-04-13
申请号：US10142896
申请日：2002-05-13
申请人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
发明人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
IPC分类号： G11B7095
CPC分类号： G11B7/131 , G11B7/00718 , G11B7/0901 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0943
摘要： An optical detector for detecting at least three optical beams reflected by an optical information recording medium and outputting an electric signal, the optical detector having three light receiving areas each of which receives a respective one of the three optical beams and each of which has four light receiving surfaces, twelve signal lines to transmit an electric signal obtained on respective ones of the four light receiving surfaces of the three light receiving areas, selected ones of the twelve signal lines connected to the four light receiving surfaces of different ones of the three light receiving areas being joined together within the optical detector, and less than nine signal output lines formed by joining the selected ones of the twelve signal lines extend from the optical detector to a signal processing circuit.
摘要翻译：一种用于检测由光学信息记录介质反射并输出电信号的至少三个光束的光学检测器，该光学检测器具有三个光接收区域，每个光接收区域接收三个光束中的相应一个，并且每个光接收区域具有四个光接收表面，用于传输在三个光接收区域的四个光接收表面中的相应一个上获得的电信号的十二条信号线，连接到三个光接收区中的不同光接收表面的四个光接收表面的十二个信号线中的选定的一个区域在光学检测器内连接在一起，并且通过连接十二条信号线中所选择的信号线形成的少于九条信号输出线从光学检测器延伸到信号处理电路。

2. 发明授权

US06728173B2 Information reproducing method which reproduces plural components of a focus error signal and a tracking error signal from plural detection regions of plural reflected light beams 失效
标题翻译：信息再现方法，其从多个反射光束的多个检测区域再现聚焦误差信号的多个分量和跟踪误差信号
公开(公告)号：US06728173B2
公开(公告)日：2004-04-27
申请号：US10131225
申请日：2002-04-25
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An information reproducing method for reproducing information recorded on a medium by irradiating a laser beam and detecting a reflected light beam from the medium. The method includes detecting a plurality of reflected light beams in which the polarities of variations in reflected light beam intensity distributions are substantially inverted to each other, the distribution variation being produced when a light spot of the laser beam crosses a track on the medium, generating components of a focus error signal and components of a tracking error signal, adding the components of the focus error signal of the plurality of reflected light beams to generate a focus error signal, and taking a difference between the components of the tracking error signal of the plurality of reflected light beams to generate a tracking error signal.
摘要翻译：一种信息再现方法，用于通过照射激光束和从介质检测反射光来再现记录在介质上的信息。该方法包括检测多个反射光束，其中反射光束强度分布的变化的极性基本上彼此反转，当激光束的光斑穿过介质上的光道时产生分布变化，产生聚焦误差信号的分量和跟踪误差信号的分量，将多个反射光束的聚焦误差信号的分量相加以产生聚焦误差信号，并且获取光信号的跟踪误差信号的分量多个反射光束产生跟踪误差信号。

3. 发明授权

US06507009B1 Optical detector, signal processing circuit and optical information reproduction apparatus thereof 有权
标题翻译：光检测器，信号处理电路及其光信息再生装置
公开(公告)号：US06507009B1
公开(公告)日：2003-01-14
申请号：US09347530
申请日：1999-07-06
申请人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
发明人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
IPC分类号： G02B704
CPC分类号： G11B7/131 , G11B7/00718 , G11B7/0901 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0943
摘要： It is desirable to greatly reduce the disturbance that arises in a focusing error signal by a astigmatic detection method and offset that arises in the tracking error signal by a push-pull method when reproducing various information storing disks, such as a DVD-RAM disk. It is also desirable to provide an optical disk apparatus which is able to reproduce a variety of high density optical disks, such as DVD-RAM and DVD-ROM disks, as well as conventional disks, such as CD, CD-ROM, CD-R disks, by using a simple optional head. For this purpose, an optical disk apparatus irradiates three optical beams produced by a diffraction grating on the specified position of an optical disk and detects reflected light using a specified optical detector divided into twelve parts.
摘要翻译：期望通过散像检测方法和再现各种信息存储盘（例如DVD-RAM盘）时通过推挽方法在跟踪误差信号中产生的偏移来大大降低在聚焦误差信号中产生的干扰。还希望提供能够再现诸如DVD-RAM和DVD-ROM盘的各种高密度光盘以及诸如CD，CD-ROM，CD-ROM等常规盘的光盘装置， R盘，通过使用简单的可选头。为此，光盘装置将由衍射光栅产生的三个光束照射在光盘的指定位置上，并使用分为十二部分的特定光学检测器检测反射光。

4. 发明授权

US06400664B1 Optical head including electrical circuit which produces focus error signal and tracking error signal unaffected by variations in intensity distributions of reflected light beams 失效
标题翻译：光头包括产生聚焦误差信号的电路，跟踪误差信号不受反射光束强度分布变化的影响
公开(公告)号：US06400664B1
公开(公告)日：2002-06-04
申请号：US09249290
申请日：1999-02-12
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An optical head eliminates an disturbance which occurs in a focus error signal in association with the decentering of an optical disk when an optical spot crosses a track on a storage film surface, and in addition the optical head cancels an off-set which occurs in a tracking error signal in association with the movement of an objective lens. In the constitution of the optical head, phases of wave surfaces of ±1st order diffracted lights are shifted by an amount of &lgr;/2 with a common period by using a phase-inverted diffraction grating the phase of which is inverted with a period of D &lgr;/(2P . NA) in a radial direction of the optical disk, thus causing, on the optical disk, sub-spots to be located on the same track as a main-spot. Taking advantage of this location, focal point shift error signals of the main-spot and the sub-spots are added to each other with an appropriate gain ratio, thereby making it possible to cancel the disturbance which occurs in the focus error signal. Meanwhile, tracking error signals of the main-spot and the sub-spots according to a push-pull method are subtracted from each other with an appropriate gain ratio, thereby making it possible to cancel the off-set.
摘要翻译：当光点穿过存储膜表面上的轨道时，光头消除了在与光盘的偏心相关联的聚焦误差信号中发生的干扰，此外，光学头消除了发生在与物镜的移动相关的跟踪误差信号。在光头的结构中，±1级衍射光的波面的相位通过使用相位相反的衍射光栅以公共周期偏移量，其相位相位与D的周期反转羔羊/（2P.NA）在光盘的径向方向上，从而在光盘上使得子点位于与主光点相同的轨道上。利用该位置，以适当的增益比将主点和子点的焦点偏移误差信号相加，从而可以消除在聚焦误差信号中发生的干扰。同时，以适当的增益比相减，根据推挽方法将主点和子点的跟踪误差信号相减，从而可以消除偏移。

5. 发明授权

US06934228B2 Optical head 失效
标题翻译：光头
公开(公告)号：US06934228B2
公开(公告)日：2005-08-23
申请号：US10827339
申请日：2004-04-20
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B7/00 , G11B7/007 , G11B7/09 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An optical head having a semiconductor laser and a generation of a plurality of reflected light beams from an optical disk which have polarities of intensity distribution variations which are substantially inverted to each other when a periodic structure of the optical disk crosses at least one focused spot on the disk. An optical detection system splits the plurality of reflected light beams and detects the split reflected light beams. An electrical circuit provides a focus error signal of the at least one focused spot and a tracking error signal from the plurality of reflected light beams. The electrical circuit adds focus error signals provides a difference signal between the focus error signals, amplifies tracking error signals with a gain, and obtains a difference between amplified tracking error.
摘要翻译：具有半导体激光器的光学头和从光盘产生多个具有强度分布变化的极性的多个反射光束的光头，当光盘的周期性结构与至少一个聚焦点交叉时，其基本上相互反转磁盘。光学检测系统分割多个反射光束并检测分离的反射光束。电路提供至少一个聚焦点的聚焦误差信号和来自多个反射光束的跟踪误差信号。电路增加聚焦误差信号在聚焦误差信号之间提供差分信号，用增益放大跟踪误差信号，并获得放大跟踪误差之间的差异。

6. 发明授权

US6125087A Optical pickup for optical disk apparatus 失效
标题翻译：光盘装置用光拾取器
公开(公告)号：US6125087A
公开(公告)日：2000-09-26
申请号：US965448
申请日：1997-11-06
申请人： Kunikazu Ohnishi , Masayuki Inoue , Tohru Sasaki , Yukio Fukui , Takeshi Nakao , Takeshi Shimano
发明人： Kunikazu Ohnishi , Masayuki Inoue , Tohru Sasaki , Yukio Fukui , Takeshi Nakao , Takeshi Shimano
IPC分类号： G11B7/00 , G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/123 , G11B7/1353 , G11B2007/0006 , G11B7/0908 , G11B7/0916 , G11B7/0943
摘要： Disclosed is an optical pickup and an optical disc device using the same, each including a laser diode, a photo-detector having a region divided into at least six photo-detection areas, and a diffraction grating disposed between the laser diode and the photo-detector and having a region divided into four areas by cross-shaped division lines. The diffraction grating divides a light beam reflected from an optical disc into four diffracted light beams. A focus error signal in accordance with a knife edge method and two kinds of tracking error signals in accordance with a push-pull method and a differential phase detection method are detected by irradiating the light beams diffracted at the areas of the diffraction grating on the detection areas of the photo-detector and/or at boundary lines therebetween, and arithmetically operating light intensity signals obtained from the detection areas of the photo-detector. As a result, there can be realized an optical pickup and an optical disc device, each of which can be matched with various optical discs different in structure by detecting a tracking error signal in accordance with the push-pull method and a tracking error signal suitable for a read only disc using only one photo-detector. Further, in the present invention, a holographic element can be used as the diffraction grating.
摘要翻译：公开了一种光拾取器和使用该光拾取器的光盘装置，每个光拾取器和光盘装置均包括激光二极管，具有被划分为至少六个光检测区域的区域的光检测器，以及设置在激光二极管和光电二极管之间的衍射光栅，并且具有通过十字形划分线划分成四个区域的区域。衍射光栅将从光盘反射的光束分成四个衍射光束。通过将衍射光栅衍射的光束照射在检测器上来检测根据刀刃法的聚焦误差信号和根据推挽法和差分相位检测方法的两种跟踪误差信号光检测器的区域和/或其间的边界线，以及从光检测器的检测区域获得的算术运算光强度信号。结果，可以实现光拾取器和光盘装置，其中的每一个可以通过根据推挽方法检测跟踪误差信号和适合的跟踪误差信号而与结构不同的各种光盘匹配对于仅使用一个光电检测器的只读光盘。此外，在本发明中，可以使用全息元件作为衍射光栅。

7. 发明授权

US5930220A Tracking method for optical disk apparatus using diffraction light 失效
$Tracking method for optical disk apparatus using diffraction light$
标题翻译：使用衍射光的光盘装置的跟踪方法
公开(公告)号：US5930220A
公开(公告)日：1999-07-27
申请号：US770075
申请日：1996-12-19
申请人： Takeshi Shimano , Akira Arimoto , Takeshi Nakao , Masayuki Inoue , Kunikazu Ohnishi , Yoshio Suzuki
发明人： Takeshi Shimano , Akira Arimoto , Takeshi Nakao , Masayuki Inoue , Kunikazu Ohnishi , Yoshio Suzuki
IPC分类号： G11B7/00 , G11B7/09 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/094 , G11B7/131 , G11B2007/0006 , G11B7/0901 , G11B7/0909
摘要： In an optical head, light from a semiconductor laser is directed through a condensing optical system with a condensing lens onto an optical information recording medium through a transparent substrate in the form of a light spot. A unit for producing a light spot position control signal and a unit able to move the light spot, which supports the objective lens for movement, position the light spot on an information track. Light reflected from the optical information recording medium is directed through a polarized light branching element to a photo detector. Also mounted for movement with the objective lens are a polarization conversion element, arranged between the optical information recording medium and the polarized light branching element in order to change the polarization state of light incident to the optical information recording medium and reflected therefrom and a polarization diffraction grating, the diffraction efficiency of which changes depending on the change in the polarization state of the incident light and the reflected light caused by the polarization conversion element. The light spot control signal is detected from both reflected light diffracted through the polarization diffraction grating and non-diffracted reflected light contained in the light which passes through the polarized light branching element.
摘要翻译：在光头中，来自半导体激光器的光通过具有聚光透镜的聚光系统通过光点形式的透明基板引导到光信息记录介质上。用于产生光点位置控制信号的单元和能够移动支持物镜移动的光点的单元将光斑定位在信息轨道上。从光信息记录介质反射的光通过偏振光分支元件被引导到光检测器。为了使入射到光信息记录介质的光的偏振状态改变并反射，偏振转换元件也安装在光学信息记录介质和偏振光分支元件之间，并且偏振衍射元件光栅，其衍射效率根据入射光的偏振态和由偏振转换元件引起的反射光的变化而变化。从通过偏振衍射光栅衍射的反射光和通过偏振光分支元件的光中包含的非衍射反射光检测光点控制信号。

8. 发明授权

US08072850B2 Optical information recording apparatus 有权
标题翻译：光信息记录装置
公开(公告)号：US08072850B2
公开(公告)日：2011-12-06
申请号：US12355715
申请日：2009-01-16
申请人： Fumio Isshiki , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
发明人： Fumio Isshiki , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/0033 , G11B7/0917 , G11B7/0945 , G11B2007/0013
摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.
摘要翻译：不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。

9. 发明申请

US20050063259A1 Optical information recording apparatus 有权
标题翻译：光信息记录装置
公开(公告)号：US20050063259A1
公开(公告)日：2005-03-24
申请号：US10879080
申请日：2004-06-30
申请人： Fumio Isshiki , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
发明人： Fumio Isshiki , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
IPC分类号： G11B7/085 , G11B7/00 , G11B7/0033 , G11B7/09 , G11B7/125 , G11B7/135
CPC分类号： G11B7/13925 , G11B7/0033 , G11B7/0917 , G11B7/0945 , G11B2007/0013
摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.
摘要翻译：不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。

10. 发明申请

US20090129217A1 OPTICAL INFORMATION RECORDING APPARATUS 有权
标题翻译：光信息记录装置
公开(公告)号：US20090129217A1
公开(公告)日：2009-05-21
申请号：US12355715
申请日：2009-01-16
申请人： Fumio ISSHIKI , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
发明人： Fumio ISSHIKI , Kunikazu Ohnishi , Nobuyuki Maeda , Takahiro Kurokawa , Takeshi Shimano
IPC分类号： G11B7/08
CPC分类号： G11B7/13925 , G11B7/0033 , G11B7/0917 , G11B7/0945 , G11B2007/0013
摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.
摘要翻译：不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式