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1. 发明授权

US07974172B2 Optical pickup apparatus 有权
标题翻译：光拾取装置
公开(公告)号：US07974172B2
公开(公告)日：2011-07-05
申请号：US12562054
申请日：2009-09-17
申请人： Kiyotaka Eizumi , Minoru Sato
发明人： Kiyotaka Eizumi , Minoru Sato
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/0912 , G11B7/1353 , G11B2007/0006
摘要： An optical-pickup apparatus comprising: a laser-light source; a diffraction grating including first-and-second regions of periodic structures different in phase from each other and a third region whose periodic structure is different in phase from the first-and-second regions; an objective lens focusing main-and-sub-luminous fluxes generated by the diffraction grating on the same optical-disc track; and a photodetector to receive reflected light of the main-and-sub-luminous fluxes from an optical disc and output a detection signal for generating main-and-sub-push-pull signals, a relationship between an incident light width in the objective lens corresponding to the third region and pupil diameters of the objective lens corresponding to first-and-second wavelengths of laser lights being adjusted so that a ratio of minimum value to maximum value of a differential-push-pull-signal is at substantially 50% or more and a ratio of sub-push-pull-signal level to main-push-pull-signal level is at substantially 15% or more, in both cases of the laser lights.
摘要翻译：一种光拾取装置，包括：激光光源; 衍射光栅，包括彼此相位不同的周期性结构的第一和第二区域以及周期性结构与第一和第二区域的相位不同的第三区域; 将由衍射光栅产生的主和次光束聚焦在同一光盘轨道上的物镜; 以及光电检测器，用于从光盘接收主和次光束的反射光，并输出用于产生主和次推挽信号的检测信号，物镜中的入射光宽度之间的关系对应于对应于激光的第一和第二波长的物镜的第三区域和瞳孔直径被调节，使得差分推挽信号的最小值与最大值的比率基本上为50％，或者在激光的两种情况下，副推挽信号电平与主推挽信号电平的比例大致为15％以上。

2. 发明授权

US08750083B2 Optical pickup apparatus and disc apparatus including the same 失效
标题翻译：光拾取装置和包括该拾取装置的盘装置
公开(公告)号：US08750083B2
公开(公告)日：2014-06-10
申请号：US13095624
申请日：2011-04-27
申请人： Minoru Sato , Kiyotaka Eizumi , Shuichi Ichiura
发明人： Minoru Sato , Kiyotaka Eizumi , Shuichi Ichiura
IPC分类号： G11B7/1353 , G11B7/12
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/1275 , G11B2007/0006
摘要： An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to split the first wavelength light into at least a first main beam and a first sub-beam and to split the second wavelength light into at least a second main beam and a second sub-beam, a following expression (1) being satisfied: 1.05
摘要翻译：光拾取装置至少包括：能够发射至少第一波长光和第二波长光的发光元件; 以及衍射光栅，其被配置为将所述第一波长光分成至少第一主光束和第一子光束，并将所述第二波长光分裂成至少第二主光束和第二子光束，所述表达式（1 ）满足：1.05

3. 发明授权

US08315140B2 Optical pickup apparatus 失效
标题翻译：光拾取装置
公开(公告)号：US08315140B2
公开(公告)日：2012-11-20
申请号：US12839903
申请日：2010-07-20
申请人： Minoru Sato , Kiyotaka Eizumi , Chiaki Asakawa
发明人： Minoru Sato , Kiyotaka Eizumi , Chiaki Asakawa
IPC分类号： G11B7/00
CPC分类号： G11B7/1365 , G11B7/123 , G11B7/127 , G11B7/1353 , G11B7/1359 , G11B7/1395 , G11B2007/0006
摘要： An optical pickup apparatus comprising: a laser light source configured to emit a laser beam; an objective lens configured to apply the laser beam to an optical recording medium; and a beam splitter including a first reflective film configured to reflect the laser beam so as to be directed to the objective lens, the beam splitter interposed in an optical path between the laser light source and the objective lens, an incidence polarization angle of the laser beam relative to the first reflective film being set such that a P-polarization component is greater than an S-polarization component in linear polarization components of the laser beam incident on the first reflective film.
摘要翻译：一种光学拾取装置，包括：被配置为发射激光束的激光源; 配置为将激光束施加到光学记录介质的物镜; 以及分束器，包括被配置为反射激光束以引导到物镜的第一反射膜，插入在激光光源和物镜之间的光路中的分束器，激光器的入射偏振角被设置为使得P偏振分量大于入射到第一反射膜上的激光束的线偏振分量中的S偏振分量。

4. 发明授权

US08081556B2 Optical pickup apparatus 失效
标题翻译：光拾取装置
公开(公告)号：US08081556B2
公开(公告)日：2011-12-20
申请号：US12558468
申请日：2009-09-11
申请人： Kiyotaka Eizumi , Minoru Sato
发明人： Kiyotaka Eizumi , Minoru Sato
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： An optical-pickup apparatus comprising: a laser-light source including first-and-second-light-emitting points for laser lights with first-and-second wavelengths which points are disposed at positions deviating in a direction optically corresponding to an optical-disc-tracking direction; a diffraction grating including a plurality of periodic structures which are joined to be different in phase from each other in the direction and each of which includes a recess and projection repeated in a direction optically corresponding to an optical-disc-tangential direction, the diffraction grating being configured to generate main-and-sub-luminous fluxes from the laser light; a holder to hold the diffraction grating to be movable in the direction corresponding to the tracking direction; a collimating lens; an objective lens to focus the main-and-sub-luminous fluxes from the collimating lens on the same track of an optical disc; and a photodetector to be applied with reflected lights of the main-and-sub-luminous fluxes from the optical disc, to generate main-and-sub-push-pull signals.
摘要翻译：一种光拾取装置，包括：激光光源，其包括用于具有第一和第二波长的激光的第一和第二发光点，所述激光光点位于与光盘对应的光学方向偏离的位置追踪方向衍射光栅，其包括多个周期性结构，其在方向上彼此相位接合，并且每个包括在与光盘切线方向光学对应的方向上重复的凹部和突起，衍射光栅被配置为从激光产生主和次光通量; 保持器，用于保持衍射光栅能够沿与跟踪方向相对应的方向移动; 准直透镜; 将来自准直透镜的主亚光束和次光束聚焦在光盘的同一轨道上的物镜; 以及要从光盘施加主和次光通量的反射光的光电检测器，以产生主推亚信号。

5. 发明申请

US20110170397A1 Optical Pickup Apparatus 失效
标题翻译：光学拾取装置
公开(公告)号：US20110170397A1
公开(公告)日：2011-07-14
申请号：US12839903
申请日：2010-07-20
申请人： Minoru Sato , Kiyotaka Eizumi , Chiaki Asakawa
发明人： Minoru Sato , Kiyotaka Eizumi , Chiaki Asakawa
IPC分类号： G11B7/135
CPC分类号： G11B7/1365 , G11B7/123 , G11B7/127 , G11B7/1353 , G11B7/1359 , G11B7/1395 , G11B2007/0006
摘要： An optical pickup apparatus comprising: a laser light source configured to emit a laser beam; an objective lens configured to apply the laser beam to an optical recording medium; and a beam splitter including a first reflective film configured to reflect the laser beam so as to be directed to the objective lens, the beam splitter interposed in an optical path between the laser light source and the objective lens, an incidence polarization angle of the laser beam relative to the first reflective film being set such that a P-polarization component is greater than an S-polarization component in linear polarization components of the laser beam incident on the first reflective film.
摘要翻译：一种光学拾取装置，包括：被配置为发射激光束的激光源; 配置为将激光束施加到光学记录介质的物镜; 以及分束器，包括被配置为反射激光束以引导到物镜的第一反射膜，插入在激光光源和物镜之间的光路中的分束器，激光器的入射偏振角被设置为使得P偏振分量大于入射在第一反射膜上的激光束的线偏振分量中的S偏振分量。

6. 发明申请

US20120182850A1 Optical Pickup Apparatus and Disc Apparatus Including the Same 失效
标题翻译：包括其的光学拾取装置和光盘装置
公开(公告)号：US20120182850A1
公开(公告)日：2012-07-19
申请号：US13095624
申请日：2011-04-27
申请人： Minoru Sato , Kiyotaka Eizumi , Shuichi Ichiura
发明人： Minoru Sato , Kiyotaka Eizumi , Shuichi Ichiura
IPC分类号： G11B7/1353 , G11B7/12
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/1275 , G11B2007/0006
摘要： An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to split the first wavelength light into at least a first main beam and a first sub-beam and to split the second wavelength light into at least a second main beam and a second sub-beam, a following expression (1) being satisfied: 1.05
摘要翻译：光拾取装置至少包括：能够发射至少第一波长光和第二波长光的发光元件; 以及衍射光栅，其被配置为将所述第一波长光分成至少第一主光束和第一子光束，并将所述第二波长光分裂成至少第二主光束和第二子光束，所述表达式（1 ）满足：1.05

7. 发明申请

US20100067355A1 Optical Pickup Apparatus 失效
标题翻译：光学拾取装置
公开(公告)号：US20100067355A1
公开(公告)日：2010-03-18
申请号：US12558468
申请日：2009-09-11
申请人： Kiyotaka Eizumi , Minoru Sato
发明人： Kiyotaka Eizumi , Minoru Sato
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： An optical-pickup apparatus comprising: a laser-light source including first-and-second-light-emitting points for laser lights with first-and-second wavelengths which points are disposed at positions deviating in a direction optically corresponding to an optical-disc-tracking direction; a diffraction grating including a plurality of periodic structures which are joined to be different in phase from each other in the direction and each of which includes a recess and projection repeated in a direction optically corresponding to an optical-disc-tangential direction, the diffraction grating being configured to generate main-and-sub-luminous fluxes from the laser light; a holder to hold the diffraction grating to be movable in the direction corresponding to the tracking direction; a collimating lens; an objective lens to focus the main-and-sub-luminous fluxes from the collimating lens on the same track of an optical disc; and a photodetector to be applied with reflected lights of the main-and-sub-luminous fluxes from the optical disc, to generate main-and-sub-push-pull signals.
摘要翻译：一种光拾取装置，包括：激光光源，其包括用于具有第一和第二波长的激光的第一和第二发光点，所述激光光点位于与光盘对应的光学方向偏离的位置追踪方向衍射光栅，其包括多个周期性结构，其在方向上彼此相位接合，并且每个包括在与光盘切线方向光学对应的方向上重复的凹部和突起，衍射光栅被配置为从激光产生主和次光通量; 保持器，用于保持衍射光栅能够沿与跟踪方向相对应的方向移动; 准直透镜; 将来自准直透镜的主亚光束和次光束聚焦在光盘的同一轨道上的物镜; 以及要从光盘施加主和次光通量的反射光的光电检测器，以产生主推亚信号。

8. 发明申请

US20100067350A1 Optical Pickup Apparatus 有权
标题翻译：光学拾取装置
公开(公告)号：US20100067350A1
公开(公告)日：2010-03-18
申请号：US12562054
申请日：2009-09-17
申请人： Kiyotaka Eizumi , Minoru Sato
发明人： Kiyotaka Eizumi , Minoru Sato
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/0912 , G11B7/1353 , G11B2007/0006
摘要： An optical-pickup apparatus comprising: a laser-light source; a diffraction grating including first-and-second regions of periodic structures different in phase from each other and a third region whose periodic structure is different in phase from the first-and-second regions; an objective lens focusing main-and-sub-luminous fluxes generated by the diffraction grating on the same optical-disc track; and a photodetector to receive reflected light of the main-and-sub-luminous fluxes from an optical disc and output a detection signal for generating main-and-sub-push-pull signals, a relationship between an incident light width in the objective lens corresponding to the third region and pupil diameters of the objective lens corresponding to first-and-second wavelengths of laser lights being adjusted so that a ratio of minimum value to maximum value of a differential-push-pull-signal is at substantially 50% or more and a ratio of sub-push-pull-signal level to main-push-pull-signal level is at substantially 15% or more, in both cases of the laser lights.
摘要翻译：一种光拾取装置，包括：激光光源; 衍射光栅，包括彼此相位不同的周期性结构的第一和第二区域以及周期性结构与第一和第二区域的相位不同的第三区域; 将由衍射光栅产生的主和次光束聚焦在同一光盘轨道上的物镜; 以及光电检测器，用于从光盘接收主和次光束的反射光，并输出用于产生主和次推挽信号的检测信号，物镜中的入射光宽度之间的关系对应于对应于激光的第一和第二波长的物镜的第三区域和瞳孔直径被调节，使得差分推挽信号的最小值与最大值的比率基本上为50％，或者在激光的两种情况下，副推挽信号电平与主推挽信号电平的比例大致为15％以上。

9. 发明授权

US07672202B2 Optical pickup apparatus 失效
标题翻译：光拾取装置
公开(公告)号：US07672202B2
公开(公告)日：2010-03-02
申请号：US11560758
申请日：2006-11-16
申请人： Tohru Hotta , Yoshio Hayashi , Noriyoshi Ooyama , Kiyotaka Eizumi
发明人： Tohru Hotta , Yoshio Hayashi , Noriyoshi Ooyama , Kiyotaka Eizumi
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup apparatus comprising: a diffraction grating including a first grating for diffracting a first laser light beam, and a second grating for diffracting a second laser light beam which is shorter in wavelength than the first laser light beam, the diffraction grating being disposed in a common optical path for guiding the first laser light beam and the second laser light beam to an optical disc; and a photo detector including in a first light receiving area, a main light receiving unit, a front sub-light receiving unit, and a rear sub-light receiving unit that receive reflected light beams, which are reflected by the optical disc, of a main beam, of a front sub-beam, and of a rear sub-beam, respectively, the first laser light beam being diffracted by the diffraction grating into the main beam, the front sub-beam formed in front of the main beam, and the rear sub-beam formed at the back of the main beam, wherein the first grating is set such that the front sub-light receiving unit and the rear sub-light receiving unit in the first light receiving area are disposed at positions which substantially avoid unnecessary diffracted light beam spots which are generated by projecting to the first light receiving area unnecessary diffracted light beams, the unnecessary diffracted light beams generated by the second grating from the first laser light beam.
摘要翻译：一种光学拾取装置，包括：衍射光栅，包括用于衍射第一激光束的第一光栅和用于衍射比第一激光束波长短的第二激光束的第二光栅，所述衍射光栅设置在用于将第一激光束和第二激光束引导到光盘的公共光路; 以及光接收单元，其包括在第一受光区域，主光接收单元，前副光接收单元和后副光接收单元中的光检测器，其接收由光盘反射的反射光束，主子束，前子光束和后副光束，第一激光束被衍射光栅衍射成主光束，形成在主光束前面的前子光束，以及形成在主光束后部的后副光束，其中第一光栅被设置为使得第一光接收区域中的前子光接收单元和后副光接收单元被设置在基本避免的位置通过向第一光接收区域投射不需要的衍射光束而产生的不必要的衍射光束点，由第二光栅从第一激光束产生的不需要的衍射光束。

10. 发明申请

US20070127349A1 OPTICAL PICKUP APPARATUS 失效
公开(公告)号：US20070127349A1
公开(公告)日：2007-06-07
申请号：US11560758
申请日：2006-11-16
申请人： Tohru Hotta , Yoshio Hayashi , Noriyoshi Ooyama , Kiyotaka Eizumi
发明人： Tohru Hotta , Yoshio Hayashi , Noriyoshi Ooyama , Kiyotaka Eizumi
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup apparatus comprising: a diffraction grating including a first grating for diffracting a first laser light beam, and a second grating for diffracting a second laser light beam which is shorter in wavelength than the first laser light beam, the diffraction grating being disposed in a common optical path for guiding the first laser light beam and the second laser light beam to an optical disc; and a photo detector including in a first light receiving area, a main light receiving unit, a front sub-light receiving unit, and a rear sub-light receiving unit that receive reflected light beams, which are reflected by the optical disc, of a main beam, of a front sub-beam, and of a rear sub-beam, respectively, the first laser light beam being diffracted by the diffraction grating into the main beam, the front sub-beam formed in front of the main beam, and the rear sub-beam formed at the back of the main beam, wherein the first grating is set such that the front sub-light receiving unit and the rear sub-light receiving unit in the first light receiving area are disposed at positions which substantially avoid unnecessary diffracted light beam spots which are generated by projecting to the first light receiving area unnecessary diffracted light beams, the unnecessary diffracted light beams generated by the second grating from the first laser light beam.
摘要翻译：一种光学拾取装置，包括：衍射光栅，包括用于衍射第一激光束的第一光栅和用于衍射比第一激光束波长短的第二激光束的第二光栅，所述衍射光栅设置在用于将第一激光束和第二激光束引导到光盘的公共光路; 以及光接收单元，其包括在第一受光区域，主光接收单元，前副光接收单元和后副光接收单元中的光检测器，其接收由光盘反射的反射光束，主子束，前子光束和后副光束，第一激光束被衍射光栅衍射成主光束，形成在主光束前面的前子光束，以及形成在主光束后部的后副光束，其中第一光栅被设置为使得第一光接收区域中的前子光接收单元和后副光接收单元被设置在基本避免的位置通过向第一光接收区域投射不需要的衍射光束而产生的不必要的衍射光束点，由第二光栅从第一激光束产生的不需要的衍射光束。

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