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1. 发明申请

US20060245335A1 Optical head and information recording/reproducing apparatus 审中-公开
标题翻译：光头和信息记录/重放装置
公开(公告)号：US20060245335A1
公开(公告)日：2006-11-02
申请号：US11410123
申请日：2006-04-25
申请人： Kazuhiro Nagata , Katsuo Iwata , Yuuichi Nakamura
发明人： Kazuhiro Nagata , Katsuo Iwata , Yuuichi Nakamura
IPC分类号： G11B7/135
CPC分类号： G11B7/1263 , G11B2007/0006
摘要： To provide an optical head unit and an information recording/reproducing apparatus which are configured to provide a stable reproducing signal when reproducing information from a recording medium of a corresponding standard by selectively using laser beams with different wavelengths, a stable reproduce signal is obtained by one object lens when reproducing information from a recording medium of a standard defined according to each of three laser beams with different wavelengths, by arranging first to third light sources capable of outputting lights with different wavelengths, first and second wavelength selection films related to the arrangement of the light sources, and a polarization beam splitter in a predetermined order, and separating an output for power monitor by a polarization beam splitter.
摘要翻译：为了提供一种光头单元和信息记录/再现装置，其被配置为当通过选择性地使用具有不同波长的激光束从相应标准的记录介质再现信息时提供稳定的再现信号，通过一个从根据具有不同波长的三个激光束中的每一个定义的标准的记录介质再现信息时，通过布置能够输出具有不同波长的光的第一至第三光源，配置第一和第二波长选择膜光源和偏振分束器，并且通过偏振分束器分离用于功率监视器的输出。

2. 发明申请

US20060245334A1 Optical head and optical disc apparatus 审中-公开
标题翻译：光头和光盘装置
公开(公告)号：US20060245334A1
公开(公告)日：2006-11-02
申请号：US11410069
申请日：2006-04-25
申请人： Kazuhiro Nagata , Katsuo Iwata , Yuuichi Nakamura
发明人： Kazuhiro Nagata , Katsuo Iwata , Yuuichi Nakamura
IPC分类号： G11B7/135
CPC分类号： G11B7/1263 , G11B2007/0006
摘要： To have laser light sources with different wavelengths as one body, to guide the optical axes of the laser light sources through a common optics as far as possible, and to realize compactness, manufacturing easiness, low cost and high performance and reliability, when the wavelengths of laser beams from first, second and third light sources 21, 22, and 23 are different, a laser beam with a shortest wavelength is output from the first light source, a laser beam with a intermediate wavelength is output from the second light source, and a laser beam with a longest wavelength is output from the third light source. In this arrangement, a laser beam from the light source with a shortest wavelength is reflected by the least number of times.
摘要翻译：为了将具有不同波长的激光光源作为一体，尽可能地通过普通光学器件引导激光光源的光轴，并且当波长为波长时，波长可以实现紧凑性，制造容易度，低成本，高性能和可靠性来自第一，第二和第三光源21,22和23的激光束的不同之处在于，从第一光源输出具有最短波长的激光束，从第二光源输出具有中等波长的激光束，并且从第三光源输出具有最长波长的激光束。在这种布置中，来自具有最短波长的光源的激光束被反射最少次数。

3. 发明申请

US20060245317A1 Optical head and information recording/reproducing apparatus 审中-公开
标题翻译：光头和信息记录/重放装置
公开(公告)号：US20060245317A1
公开(公告)日：2006-11-02
申请号：US11410158
申请日：2006-04-25
申请人： Katsuo Iwata , Kazuhiro Nagata , Yuuichi Nakamura
发明人： Katsuo Iwata , Kazuhiro Nagata , Yuuichi Nakamura
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： To provide an optical head unit which is configured to provide a reproduce signal when reproducing information from a recording medium of a corresponding standard by selectively using laser beams with different wavelengths, an optical diffraction element is provided, in which the grooves of a binary diffraction grating mainly for a laser beam with a wavelength of 655 nm and a blazed diffraction grating mainly for a laser beam with a wavelength of 405 nm are defined substantially parallel, and the reflected laser beams of the laser beams with respective wavelengths reflected by a corresponding optical disc are guided to a substantially the same detection area or detection areas positioned very close to one another in a photodetector.
摘要翻译：为了提供一种光头单元，其被配置为当通过选择性地使用具有不同波长的激光束从相应标准的记录介质再现信息时提供再现信号，提供光学衍射元件，其中二元衍射光栅主要用于波长为655nm的激光束和主要用于波长为405nm的激光束的闪耀衍射光栅被基本上平行地限定，并且具有相应波长的激光束的反射激光束被相应的光盘被引导到基本上相同的检测区域或在光电检测器中彼此非常接近定位的检测区域。

4. 发明申请

US20060245316A1 Optical head and information recording/reproducing apparatus 审中-公开
标题翻译：光头和信息记录/重放装置
公开(公告)号：US20060245316A1
公开(公告)日：2006-11-02
申请号：US11410137
申请日：2006-04-25
申请人： Katsuo Iwata , Kazuhiro Nagata , Yuuichi Nakamura
发明人： Katsuo Iwata , Kazuhiro Nagata , Yuuichi Nakamura
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B2007/0006
摘要： To provide an optical head unit which is configured to provide a reproducing signal difficult to be influenced by vibrations when reproducing information from a recording medium of a corresponding standard by selectively using laser beams with different wavelengths, the distance between a beam split phase of a beam splitter and a photodetector is reduced by providing a ball lens on a beam split plane defined not parallel and not vertical to an axial line connecting an optical coupling prism and a beam splitter, and reducing the distance between a photodetector and a beam split plane of a beam splitter, as an embodiment of a disc apparatus.
摘要翻译：提供一种光头单元，其被配置为当通过选择性地使用具有不同波长的激光束从相应标准的记录介质再现信息时提供难以受到振动的再现信号，光束分束相位之间的距离通过在光束分离平面上设置球面透镜而不是平行且不垂直于连接光耦合棱镜和分束器的轴线而减小光束检测器和光束检测器，并且减小光电检测器与光束分离平面之间的距离分束器，作为盘装置的实施例。

5. 发明申请

US20070159936A1 Optical head unit and optical disc apparatus 审中-公开
标题翻译：光头单元和光盘装置
公开(公告)号：US20070159936A1
公开(公告)日：2007-07-12
申请号：US11646950
申请日：2006-12-28
申请人： Katsuo Iwata , Kazuhiro Nagata , Hideaki Okano
发明人： Katsuo Iwata , Kazuhiro Nagata , Hideaki Okano
IPC分类号： G11B7/00
CPC分类号： G11B7/13927 , G11B7/0945 , G11B7/0948 , G11B7/131 , G11B7/1369
摘要： According to one embodiment, an optical head unit according to an embodiment of the invention, a reflected beam guided to a detection area of a photodetector is changed in the image forming characteristic by a liquid crystal element, which is placed between an object lens and a collimator lens, and provided with a controllable diffraction index, according to a spherical aberration amount corresponding to a thickness error in a protection layer of an optical disc and a comatic aberration amount corresponding to a disc tilt of an optical disc.
摘要翻译：根据一个实施例，根据本发明的实施例的光学头单元，被引导到光电检测器的检测区域的反射光束通过液晶元件在图像形成特性中改变，该液晶元件被放置在物镜和准直透镜，并且根据与光盘的保护层中的厚度误差相对应的球面像差量和对应于光盘的盘倾斜的彗形像差量，设置有可控衍射指数。

6. 发明申请

US20070097810A1 OPTICAL HEAD UNIT AND OPTICAL DISC APPARATUS 审中-公开
标题翻译：光头单元和光盘设备
公开(公告)号：US20070097810A1
公开(公告)日：2007-05-03
申请号：US11553795
申请日：2006-10-27
申请人： Kazuhiro Nagata , Katsuo Iwata
发明人： Kazuhiro Nagata , Katsuo Iwata
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/1369 , G11B7/13925 , G11B2007/0013
摘要： According to one embodiment, an optical head unit which is provided with a liquid crystal element to correct aberration on an information recording surface of an optical disc, to decrease the influence of inclination and variations in the thickness of an optical disc, regardless of displacement of an optical axis of an object lens from a central axis of a liquid crystal element, the outermost transparent electrode among transparent electrodes optimized at a position where the optical axis of the object lens is not displaced from the center of the transparent electrode of the liquid crystal element, is shaped like an ellipse by extending in the radial direction of an optical disc.
摘要翻译：根据一个实施例，一种光学头单元，其设置有用于校正光盘的信息记录表面上的像差的液晶元件，以减小光盘的倾斜和厚度的变化的影响，而不管来自液晶元件的中心轴的物镜的光轴，在物镜的光轴不偏离液晶透明电极的中心的位置优化的透明电极中最外侧的透明电极元件通过在光盘的径向方向上延伸而成形为椭圆形。

7. 发明授权

US07978585B2 Aberration correcting device, optical head, and optical disc apparatus 有权
标题翻译：畸变校正装置，光头和光盘装置
公开(公告)号：US07978585B2
公开(公告)日：2011-07-12
申请号：US12493007
申请日：2009-06-26
申请人： Kazuhiro Nagata , Katsuo Iwata
发明人： Kazuhiro Nagata , Katsuo Iwata
IPC分类号： G11B7/135
CPC分类号： G11B7/1369 , G11B7/13927
摘要： An aberration correcting device includes: a first transparent electrode; a second transparent electrode; and a liquid crystal layer disposed between the first transparent electrode and the second transparent electrode, having refractive index varying according to an electric field applied to the liquid crystal layer, wherein the first transparent electrode has a first circular dividing line and a second circular dividing line formed outside the first circular division line arranged to be concentric with the second circular dividing line, and wherein a region between the first circular dividing line and the second circular dividing line is radially divided by plural radial dividing lines.
摘要翻译：像差校正装置包括：第一透明电极; 第二透明电极; 以及液晶层，其设置在所述第一透明电极和所述第二透明电极之间，其折射率根据施加到所述液晶层的电场而变化，其中所述第一透明电极具有第一圆形分割线和第二圆形分割线形成在与第二圆形分割线同心的第一圆形分割线之外，并且其中第一圆形分割线和第二圆形分割线之间的区域由多个径向分割线径向分开。

8. 发明申请

US20100027385A1 ABERRATION CORRECTING DEVICE, OPTICAL HEAD, AND OPTICAL DISC APPARATUS 有权
标题翻译：异常校正装置，光头和光盘装置
公开(公告)号：US20100027385A1
公开(公告)日：2010-02-04
申请号：US12493007
申请日：2009-06-26
申请人： Kazuhiro Nagata , Katsuo Iwata
发明人： Kazuhiro Nagata , Katsuo Iwata
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/1369 , G11B7/13927
摘要： An aberration correcting device includes: a first transparent electrode; a second transparent electrode; and a liquid crystal layer disposed between the first transparent electrode and the second transparent electrode, having refractive index varying according to an electric field applied to the liquid crystal layer, wherein the first transparent electrode has a first circular dividing line and a second circular dividing line formed outside the first circular division line arranged to be concentric with the second circular dividing line, and wherein a region between the first circular dividing line and the second circular dividing line is radially divided by plural radial dividing lines.
摘要翻译：像差校正装置包括：第一透明电极; 第二透明电极; 以及液晶层，其设置在所述第一透明电极和所述第二透明电极之间，其折射率根据施加到所述液晶层的电场而变化，其中所述第一透明电极具有第一圆形分割线和第二圆形分割线形成在与第二圆形分割线同心的第一圆形分割线之外，并且其中第一圆形分割线和第二圆形分割线之间的区域由多个径向分割线径向分开。

9. 发明申请

US20080212418A1 OPTICAL DISC DEVICE 审中-公开
标题翻译：光盘设备
公开(公告)号：US20080212418A1
公开(公告)日：2008-09-04
申请号：US12022953
申请日：2008-01-30
申请人： Kazuhiro Nagata , Katsuo Iwata , Hideaki Okano
发明人： Kazuhiro Nagata , Katsuo Iwata , Hideaki Okano
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B19/12 , G11B2007/0013
摘要： According to one embodiment, an optical head device provides a signal processing circuit which sets a control amount to move an objective lens so that a distance between the objective lens and a given recording layer of the an optical disc coincides with a focal position, an optical path length correction mechanism which corrects an influence of an aberration component producing an error in the focal distance, a thickness difference detection circuit which finds an amount of correction to be made by the optical path length, and an aberration correction circuit which generates a correction signal to correct the influence of the aberration component producing the error in the focal distance detected by the thickness difference detection circuit, and supplies the correction signal to the optical path length correction mechanism.
摘要翻译：根据一个实施例，光学头装置提供信号处理电路，其设置控制量以移动物镜，使得物镜与光盘的给定记录层之间的距离与焦点位置一致，光学路径长度校正机构，其校正产生焦距误差的像差分量的影响;求出由光程长度求出的校正量的厚度差检测电路;以及产生校正信号的像差校正电路以校正产生由厚度差检测电路检测的焦距的误差的像差分量的影响，并将校正信号提供给光路长度校正机构。

10. 发明申请

US20080186832A1 OPTICAL HEAD UNIT AND OPTICAL DISC DRIVE 审中-公开
标题翻译：光头单元和光盘驱动器
公开(公告)号：US20080186832A1
公开(公告)日：2008-08-07
申请号：US12023795
申请日：2008-01-31
申请人： Katsuo Iwata , Kazuhiro Nagata , Hideaki Okano
发明人： Katsuo Iwata , Kazuhiro Nagata , Hideaki Okano
IPC分类号： G11B7/00
CPC分类号： G11B7/13927 , G11B7/0932 , G11B7/1369 , G11B2007/0006
摘要： According to an embodiment of the optical head unit includes two or more light sources, an objective lens which condenses the light beam having the predetermined wavelength output from each of the light sources to a recording layer of a recording medium, and captures a light beam reflected on the recording layer, a polarization control element arranged between the light sources and the objective lens, to optimize directions of polarization of the light beam having the predetermined wavelength output from the light source and the light beam reflected on the recording layer, in accordance with the wavelength thereof, on the basis of a voltage to be applied, a photodetector which receives the reflected light beam captured by the objective lens and outputs a predetermined signal, and a polarization controller which varies the direction of polarization set by the polarization control element, in accordance with the output of the photodetector, the fluctuations of the signals recorded and/or reproduced in each wavelength of the light beams with each of three kinds of optical discs different in recording density and format are stabilized.
摘要翻译：根据光头单元的实施例包括两个或更多个光源，将从每个光源输出的具有预定波长的光束聚光到记录介质的记录层的物镜，并且捕获反射的光束在记录层上，设置在光源和物镜之间的偏振控制元件，以优化具有从光源输出的预定波长的光束和记录层上反射的光束的光束的偏振方向，根据基于要施加的电压的波长，接收由物镜捕获的反射光束并输出预定信号的光电检测器，以及改变由偏振控制元件设定的偏振方向的偏振控制器，根据光电检测器的输出，记录的信号的波动和/或在记录密度和格式不同的三种光盘中的每一种光束的每个波长中再生。

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