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1. 发明授权

US07852735B2 Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US07852735B2
公开(公告)日：2010-12-14
申请号：US11943251
申请日：2007-11-20
申请人： Kazushi Mori , Katsutoshi Hibino , Kenji Asano , Kenji Nagatomi , Shogo Suzuki , Naoyuki Takagi
发明人： Kazushi Mori , Katsutoshi Hibino , Kenji Asano , Kenji Nagatomi , Shogo Suzuki , Naoyuki Takagi
IPC分类号： G11B7/135
CPC分类号： G11B7/131 , G11B7/1353
摘要： A diffraction element is disposed between a beam branching element (such as a beam splitter) and a photodetector. The diffraction element further segment an interference fringe introduced into stray light by a diffraction grating which divides a laser beam emitted from a laser beam source into a main beam and two sub-beams.
摘要翻译：衍射元件设置在光束分支元件（例如光束分离器）和光电检测器之间。衍射元件还通过将从激光束源发射的激光束分成主光束和两个子光束的衍射光栅进一步分割引入到杂散光中的干涉条纹。

2. 发明申请

US20080019254A1 OPTICAL PICKUP DEVICE 审中-公开
标题翻译：光学拾取器件
公开(公告)号：US20080019254A1
公开(公告)日：2008-01-24
申请号：US11780875
申请日：2007-07-20
申请人： Kazushi Mori , Katsutoshi Hibino , Kenji Nagatomi , Naoyuki Takagi
发明人： Kazushi Mori , Katsutoshi Hibino , Kenji Nagatomi , Naoyuki Takagi
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/1381 , G11B2007/0013
摘要： A laser beam emitted from a light source is divided into a main beam and two sub-beams by a diffraction grating. A filter is arranged between a collimator lens and an objective lens. A filter unit is arranged in a predetermined pattern in the filter. The filter unit gives a maximum transmittance or a maximum reflectance at an incident angle at which the laser beam is incident in a parallel light state. The filter unit is formed in a pattern in which at least the laser beam reflected from a layer except a recording layer of an irradiation target is prevented from entering a sub-beam sensor pattern.
摘要翻译：从光源发射的激光束通过衍射光栅分为主光束和两个子光束。在准直透镜和物镜之间布置滤光器。过滤器单元以预定图案布置在过滤器中。滤光单元在激光束以平行光状态入射的入射角处给出最大透射率或最大反射率。滤波器单元形成为至少防止从除了照射目标的记录层以外的层反射的激光束进入子光束传感器图案的图案。

3. 发明申请

US20080137513A1 OPTICAL PICKUP DEVICE 失效
标题翻译：光学拾取器件
公开(公告)号：US20080137513A1
公开(公告)日：2008-06-12
申请号：US11943251
申请日：2007-11-20
申请人： Kazushi Mori , Katsutoshi Hibino , Kenji Asano , Kenji Nagatomi , Shogo Suzuki , Naoyuki Takagi
发明人： Kazushi Mori , Katsutoshi Hibino , Kenji Asano , Kenji Nagatomi , Shogo Suzuki , Naoyuki Takagi
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/1353
摘要： A diffraction element is disposed between a beam branching element (such as a beam splitter) and a photodetector. The diffraction element further segment an interference fringe introduced into stray light by a diffraction grating which divides a laser beam emitted from a laser beam source into a main beam and two sub-beams.
摘要翻译：衍射元件设置在光束分支元件（例如光束分离器）和光电检测器之间。衍射元件还通过将从激光束源发射的激光束分成主光束和两个子光束的衍射光栅进一步分割引入到杂散光中的干涉条纹。

4. 发明申请

US20100182891A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE 失效
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20100182891A1
公开(公告)日：2010-07-22
申请号：US12690501
申请日：2010-01-20
申请人： Noboru Mamiya , Katsutoshi Hibino , Kenji Nagatomi
发明人： Noboru Mamiya , Katsutoshi Hibino , Kenji Nagatomi
IPC分类号： G11B7/00
CPC分类号： G11B7/094 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup device is so configured as to change the propagating directions of light fluxes in four light flux areas defined in the periphery of an optical axis of laser light, out of the laser light reflected on a disc, to separate the four light fluxes one from the other. A signal light area where only signal light exists is defined on a detecting surface of a photodetector. Sensors for signal light is disposed at a position in the signal light area to be irradiated by the signal light, and a tracking error signal is generated based on a signal from the sensors. A direct-current component of the tracking error signal resulting from positional displacements of the sensors is cancelled by adjusting a gain of the signal from the sensor.
摘要翻译：光学拾取装置被配置成在由光盘上反射的激光中改变在激光光轴的外围限定的四个光通量区域中的光束的传播方向，从而将四个光束1 从另一个仅在信号光存在的信号光区域被限定在光检测器的检测表面上。用于信号光的传感器设置在信号光区域中由信号光照射的位置，并且基于来自传感器的信号产生跟踪误差信号。通过调节来自传感器的信号的增益来消除由传感器的位置偏移产生的跟踪误差信号的直流分量。

5. 发明申请

US20100027405A1 OPTICAL PICKUP APPARATUS, FOCAL-POINT ADJUSTING METHOD, AND OPTICAL DISC APPARATUS 失效
标题翻译：光学拾取装置，光点调整方法和光盘装置
公开(公告)号：US20100027405A1
公开(公告)日：2010-02-04
申请号：US12512440
申请日：2009-07-30
申请人： Kenji Nagatomi , Katsutoshi Hibino , Seiichiro Takahashi
发明人： Kenji Nagatomi , Katsutoshi Hibino , Seiichiro Takahashi
IPC分类号： G11B7/135 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/08511 , G11B7/0909 , G11B7/0912 , G11B7/0943 , G11B7/0956 , G11B7/131 , G11B7/133 , G11B7/1381 , G11B7/13927 , G11B2007/0013
摘要： An optical pickup apparatus is provided with an angle adjusting element. The angle adjusting element changes a propagation direction of luminous fluxes of four luminous flux regions set about an optical axis of the laser light, out of laser light reflected by a disc, and mutually disperses the luminous fluxes. A signal light region in which signal light only is present appears on a detecting surface of a photodetector. A sensor pattern for signal light is placed at a position irradiated with the signal light within this region. A sensor pattern for a spherical aberration detection is placed on an inner side of this region.
摘要翻译：光拾取装置具有角度调节元件。由光盘反射的激光，角度调整元件使围绕激光的光轴设置的四个光通量区域的光束的传播方向变化，并相互分散光束。仅在光检测器的检测表面上出现仅存在信号光的信号光区域。用于信号光的传感器图案被放置在用该区域内的信号光照射的位置。用于球面像差检测的传感器图案被放置在该区域的内侧。

6. 发明申请

US20100027404A1 OPTICAL PICKUP APPARATUS AND FOCAL-POINT ADJUSTING METHOD 失效
标题翻译：光学拾取装置和焦点调整方法
公开(公告)号：US20100027404A1
公开(公告)日：2010-02-04
申请号：US12512416
申请日：2009-07-30
申请人： Kenji Nagatomi , Katsutoshi Hibino
发明人： Kenji Nagatomi , Katsutoshi Hibino
IPC分类号： G11B7/00
CPC分类号： G11B7/0909 , G11B7/1356 , G11B7/1378 , G11B2007/13727
摘要： An optical pickup apparatus includes an astigmatic element, an angle adjusting element for contradicting propagation directions of luminous fluxes within four different luminous flux regions out of a reflected light, a polarization adjusting element. Two of the luminous flux regions are placed in a direction in which aligned are a set of opposite angles made by the two mutually crossing straight lines respectively parallel to a first convergence direction and a second convergence direction vertical to the first convergence direction by the astigmatic element, and the remaining two luminous flux regions are placed in a direction in which an alternate set of opposite angles are aligned. The polarization adjusting element differentiates polarization directions of luminous fluxes which are selected out of the luminous fluxes within the four luminous flux regions and which are adjacent in a peripheral direction in which the optical axis of reflected light serves as an axis.
摘要翻译：光学拾取装置包括像散元件，用于与反射光中的四个不同光通量区域内的光束的传播方向相抵消的角度调整元件，偏振调节元件。两个光通量区域被放置成沿着与通过散光元件分别平行于第一会聚方向和第二会聚方向的第二会聚方向的两条相互交叉的直线形成的一组相反角度的方向并且剩余的两个光通量区域被放置在一组相反的角度对齐的方向上。偏振调整元件使从四个光束区域内的光束中选出的与反射光的光轴成为轴的圆周方向相邻的光通量的偏振方向分离。

7. 发明授权

US08023387B2 Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US08023387B2
公开(公告)日：2011-09-20
申请号：US12723088
申请日：2010-03-12
申请人： Kenji Nagatomi , Katsutoshi Hibino
发明人： Kenji Nagatomi , Katsutoshi Hibino
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/1356 , G11B7/1378
摘要： An optical pickup device radiates laser light to a disc having a plurality of recording layers in a direction of lamination. The optical pickup device includes an astigmatic element and a spectral element. The astigmatic element allows reflected light from the disc to converge in a first direction and form a first focal line at a first position, and allows reflected light to converge in a second direction and form a second focal line at a second position closer to the disc than the first position. The spectral element splits a reflected light flux in two along a straight line parallel to the first direction and turns traveling directions of the split two light fluxes into directions separated from each other. Here, the spectral element is interposed between the second focal line of the reflected light from a target recording layer and the second focal line of the reflected light from a deeper recording layer than the target recording layer. The photodetector is interposed between the first and second focal lines of the reflected light from the target recording layer.
摘要翻译：光学拾取装置将激光照射到具有层叠方向的多个记录层的盘上。光学拾取装置包括像散元件和光谱元件。散光元件允许来自光盘的反射光在第一方向上会聚并在第一位置处形成第一焦线，并允许反射光在第二方向上会聚，并且在靠近光盘的第二位置处形成第二焦线比第一个位置。光谱元件沿着与第一方向平行的直线将反射光束分成两部分，并将分离的两个光束的行进方向转换成彼此分离的方向。这里，光谱元件插入在来自目标记录层的反射光的第二焦线与来自比目标记录层更深的记录层的反射光的第二焦线之间。光检测器插入在来自目标记录层的反射光的第一和第二焦点之间。

8. 发明授权

US07916612B2 Optical pickup apparatus and focal-point adjusting method 失效
标题翻译：光学拾取装置和焦点调整方法
公开(公告)号：US07916612B2
公开(公告)日：2011-03-29
申请号：US12512416
申请日：2009-07-30
申请人： Kenji Nagatomi , Katsutoshi Hibino
发明人： Kenji Nagatomi , Katsutoshi Hibino
IPC分类号： G11B7/00
CPC分类号： G11B7/0909 , G11B7/1356 , G11B7/1378 , G11B2007/13727
摘要： An optical pickup apparatus includes an astigmatic element, an angle adjusting element for contradicting propagation directions of luminous fluxes within four different luminous flux regions out of a reflected light, a polarization adjusting element. Two of the luminous flux regions are placed in a direction in which aligned are a set of opposite angles made by the two mutually crossing straight lines respectively parallel to a first convergence direction and a second convergence direction vertical to the first convergence direction by the astigmatic element, and the remaining two luminous flux regions are placed in a direction in which an alternate set of opposite angles are aligned. The polarization adjusting element differentiates polarization directions of luminous fluxes which are selected out of the luminous fluxes within the four luminous flux regions and which are adjacent in a peripheral direction in which the optical axis of reflected light serves as an axis.
摘要翻译：光学拾取装置包括像散元件，用于与反射光中的四个不同光通量区域内的光束的传播方向相抵消的角度调整元件，偏振调节元件。两个光通量区域被放置成沿着与通过散光元件分别平行于第一会聚方向和第二会聚方向的第二会聚方向的两条相互交叉的直线形成的一组相反角度的方向并且剩余的两个光通量区域被放置在一组相反的角度对齐的方向上。偏振调整元件使从四个光束区域内的光束中选出的与反射光的光轴成为轴的圆周方向相邻的光通量的偏振方向分离。

9. 发明申请

US20110026389A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE 失效
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20110026389A1
公开(公告)日：2011-02-03
申请号：US12844261
申请日：2010-07-27
申请人： Kenji Nagatomi , Katsutoshi Hibino
发明人： Kenji Nagatomi , Katsutoshi Hibino
IPC分类号： G11B7/135
CPC分类号： G11B7/0909 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup device includes an astigmatism element which sets focal line positions to be defined by convergence of laser light away from each other, a diffraction element which diffracts four light fluxes obtained by a light flux of the laser light to disperse the four light fluxes from each other, and a photodetector having a first sensing section and a second sensing section which respectively receive m-th order diffraction light and n-th order diffraction light of the four light fluxes. In this arrangement, the first sensing section receives eight light fluxes obtained by dividing the four light fluxes of the m-th order diffraction light by two straight lines to output detection signals of the number less than eight.
摘要翻译：一种光学拾取装置，包括：散光元件，其将通过激光的会聚而定义的焦点位置设置为彼此偏离;衍射元件，其衍射由激光的光束获得的四个光通量，以将四个光通量从以及具有分别接收四个光束的m次衍射光和n次衍射光的第一感测部和第二感测部的光检测器。在这种布置中，第一感测部分接收通过将m级衍射光的四个光束除以两条直线而获得的8个光束，以输出小于8的数字的检测信号。

10. 发明授权

US08040779B2 Optical pickup device and optical disc device 失效
标题翻译：光拾取装置和光盘装置
公开(公告)号：US08040779B2
公开(公告)日：2011-10-18
申请号：US12844261
申请日：2010-07-27
申请人： Kenji Nagatomi , Katsutoshi Hibino
发明人： Kenji Nagatomi , Katsutoshi Hibino
IPC分类号： G11B7/135
CPC分类号： G11B7/0909 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup device includes an astigmatism element which sets focal line positions to be defined by convergence of laser light away from each other, a diffraction element which diffracts four light fluxes obtained by a light flux of the laser light to disperse the four light fluxes from each other, and a photodetector having a first sensing section and a second sensing section which respectively receive m-th order diffraction light and n-th order diffraction light of the four light fluxes. In this arrangement, the first sensing section receives eight light fluxes obtained by dividing the four light fluxes of the m-th order diffraction light by two straight lines to output detection signals of the number less than eight.
摘要翻译：一种光学拾取装置，包括：散光元件，其将通过激光的会聚而定义的焦点位置设置为彼此偏离;衍射元件，其衍射由激光的光束获得的四个光通量，以将四个光通量从以及具有分别接收四个光束的m次衍射光和n次衍射光的第一感测部和第二感测部的光检测器。在这种布置中，第一感测部分接收通过将m级衍射光的四个光束除以两条直线而获得的8个光束，以输出小于8的数字的检测信号。

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