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1. 发明授权

US07978586B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07978586B2
公开(公告)日：2011-07-12
申请号：US12090385
申请日：2007-07-18
申请人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
发明人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/127 , G11B7/1353
摘要： An optical pickup device includes a diffraction grating 12 for separating a light beam emitted from a semiconductor laser element into at least three light beams. The diffraction grating 12 is divided into three regions by a straight line extending in a direction parallel to a tangent line of a track of an optical information recording medium. A second region 12B is divided into a first sub-block 13 and a second sub-block 14 by a straight line extending in a direction parallel to a radius direction of the optical information recording medium. The first sub-block 13 has a phase difference of approximately 180 degrees from the second sub-block 14. The first region 12A has a phase difference of approximately 90 degrees from the first sub-block 13 and has a phase difference of approximately 180 degrees from the third region 12C.
摘要翻译：光拾取装置包括用于将从半导体激光元件发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线平行的方向延伸的直线分成三个区域。第二区域12B通过沿与光信息记录介质的半径方向平行的方向延伸的直线分成第一子块13和第二子块14。第一子块13具有与第二子块14大约180度的相位差。第一区12A具有与第一子块13大约90度的相位差，并且具有大约180度的相位差从第三区域12C。

2. 发明申请

US20100177618A1 OPTICAL PICKUP DEVICE 有权
标题翻译：光学拾取器件
公开(公告)号：US20100177618A1
公开(公告)日：2010-07-15
申请号：US12090385
申请日：2007-07-18
申请人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
发明人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/127 , G11B7/1353
摘要： An optical pickup device includes a diffraction grating 12 for separating a light beam emitted from a semiconductor laser element into at least three light beams. The diffraction grating 12 is divided into three regions by a straight line extending in a direction parallel to a tangent line of a track of an optical information recording medium. A second region 12B is divided into a first sub-block 13 and a second sub-block 14 by a straight line extending in a direction parallel to a radius direction of the optical information recording medium. The first sub-block 13 has a phase difference of approximately 180 degrees from the second sub-block 14. The first region 12A has a phase difference of approximately 90 degrees from the first sub-block 13 and has a phase difference of approximately 180 degrees from the third region 12C.
摘要翻译：光拾取装置包括用于将从半导体激光元件发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线平行的方向延伸的直线分成三个区域。第二区域12B通过沿与光信息记录介质的半径方向平行的方向延伸的直线分成第一子块13和第二子块14。第一子块13具有与第二子块14大约180度的相位差。第一区12A具有与第一子块13大约90度的相位差，并且具有大约180度的相位差从第三区域12C。

3. 发明授权

US07751297B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07751297B2
公开(公告)日：2010-07-06
申请号：US12303578
申请日：2007-09-06
申请人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
发明人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： A pickup device includes a diffraction grating 12 for separating a light beam emitted from the light source into at least three light beams. The diffraction grating 12 is divided into four regions by straight lines extending in a direction parallel to a tangential direction of tracks of an optical information recording medium. A periodic structure of a second region 12B has a phase difference of approximately 180 degrees from a periodic structure of a third region 12C, and a periodic structure of a first region 12A has a phase difference of approximately 180 degrees from a periodic structure of a fourth region 12D.
摘要翻译：拾取装置包括用于将从光源发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线方向平行的方向延伸的直线分成四个区域。第二区域12B的周期性结构具有与第三区域12C的周期性结构近似180度的相位差，并且第一区域12A的周期性结构与第四区域1212的周期性结构具有大约180度的相位差区域12D。

4. 发明授权

US07940631B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07940631B2
公开(公告)日：2011-05-10
申请号：US12090563
申请日：2007-07-18
申请人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
发明人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1353
摘要： An optical pickup device includes a diffraction grating 12 for separating an emitted light beam into at least three light beams. The diffraction grating 12 is divided into three regions by dividing lines D1 and D2 extending in a first direction parallel to a tangent line of a track of an optical information recording medium. A second region 12B is divided into four sub-blocks by a dividing line D3 extending in the first direction and a dividing line D4 extending in a second direction that crosses the first direction. The sub-blocks located diagonally opposite to each other have a same phase, and the sub-blocks located adjacent to each other have a phase difference of approximately 180 degrees. The first region 12A has a phase difference of approximately 90 degrees from each sub-block of the second region 12B, and the first region 12A has a phase difference of approximately 180 degrees from the third region 12C.
摘要翻译：光学拾取装置包括用于将发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的轨道的切线平行的第一方向延伸的线D1和D2分成三个区域。第二区域12B通过沿第一方向延伸的分割线D3和沿与第一方向交叉的第二方向延伸的分割线D4被分成四个子块。彼此对角地相对的子块具有相同的相位，并且彼此相邻的子块具有大约180度的相位差。第一区域12A与第二区域12B的每个子块具有大约90度的相位差，并且第一区域12A与第三区域12C具有大约180度的相位差。

5. 发明授权

US07898927B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07898927B2
公开(公告)日：2011-03-01
申请号：US12791558
申请日：2010-06-01
申请人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
发明人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： A pickup device includes a diffraction grating 12 for separating a light beam emitted from the light source into at least three light beams. The diffraction grating 12 is divided into four regions by straight lines extending in a direction parallel to a tangential direction of tracks of an optical information recording medium. A periodic structure of a second region 12B has a phase difference of approximately 180 degrees from a periodic structure of a third region 12C, and a periodic structure of a first region 12A has a phase difference of approximately 180 degrees from a periodic structure of a fourth region 12D.
摘要翻译：拾取装置包括用于将从光源发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线方向平行的方向延伸的直线分成四个区域。第二区域12B的周期性结构具有与第三区域12C的周期性结构近似180度的相位差，并且第一区域12A的周期性结构与第四区域1212的周期性结构具有大约180度的相位差区域12D。

6. 发明申请

US20100014411A1 OPTICAL PICKUP DEVICE 有权
公开(公告)号：US20100014411A1
公开(公告)日：2010-01-21
申请号：US12303578
申请日：2007-09-06
申请人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
发明人： Takuya Okuda , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： A pickup device includes a diffraction grating 12 for separating a light beam emitted from the light source into at least three light beams. The diffraction grating 12 is divided into four regions by straight lines extending in a direction parallel to a tangential direction of tracks of an optical information recording medium. A periodic structure of a second region 12B has a phase difference of approximately 180 degrees from a periodic structure of a third region 12C, and a periodic structure of a first region 12A has a phase difference of approximately 180 degrees from a periodic structure of a fourth region 12D.

7. 发明申请

US20100157778A1 OPTICAL PICKUP DEVICE 有权
标题翻译：光学拾取器件
公开(公告)号：US20100157778A1
公开(公告)日：2010-06-24
申请号：US12090563
申请日：2007-07-18
申请人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
发明人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1353
摘要： An optical pickup device includes a diffraction grating 12 for separating an emitted light beam into at least three light beams. The diffraction grating 12 is divided into three regions by dividing lines D1 and D2 extending in a first direction parallel to a tangent line of a track of an optical information recording medium. A second region 12B is divided into four sub-blocks by a dividing line D3 extending in the first direction and a dividing line D4 extending in a second direction that crosses the first direction. The sub-blocks located diagonally opposite to each other have a same phase, and the sub-blocks located adjacent to each other have a phase difference of approximately 180 degrees. The first region 12A has a phase difference of approximately 90 degrees from each sub-block of the second region 12B, and the first region 12A has a phase difference of approximately 180 degrees from the third region 12C.
摘要翻译：光学拾取装置包括用于将发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的轨道的切线平行的第一方向延伸的线D1和D2分成三个区域。第二区域12B通过沿第一方向延伸的分割线D3和沿与第一方向交叉的第二方向延伸的分割线D4被分成四个子块。彼此对角地相对的子块具有相同的相位，并且彼此相邻的子块具有大约180度的相位差。第一区域12A与第二区域12B的每个子块具有大约90度的相位差，并且第一区域12A与第三区域12C具有大约180度的相位差。

8. 发明申请

US20090168626A1 OPTICAL PICKUP DEVICE AND PHOTODETECTOR 审中-公开
标题翻译：光学拾取器件和光电转换器
公开(公告)号：US20090168626A1
公开(公告)日：2009-07-02
申请号：US12236048
申请日：2008-09-23
申请人： Hiroaki YAMAMOTO , Naoto Shimada , Naoki Nakanishi , Takuya Okuda , Yasufumi Shirakawa
发明人： Hiroaki YAMAMOTO , Naoto Shimada , Naoki Nakanishi , Takuya Okuda , Yasufumi Shirakawa
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/0903 , G11B7/094 , G11B7/0943 , G11B7/131 , G11B7/1353
摘要： An optical pickup device includes: a first light-receiving element for receiving a main beam of a first light beam; second and third light-receiving elements for receiving sub-beams of the first light beam; a fourth light-receiving element for receiving a main beam of a second light beam; and fifth and sixth light-receiving elements for receiving sub-beams of the second light beam. The first through third light-receiving elements are located on a first line with the first light-receiving element sandwiched between the second and third light-receiving elements. The fourth through sixth light-receiving elements are located on a second line with the fourth light-receiving element sandwiched between the fifth and sixth light-receiving elements. The first line and the second line are parallel to each other.
摘要翻译：一种光学拾取装置包括：用于接收第一光束的主光束的第一光接收元件; 第二和第三光接收元件，用于接收第一光束的子光束; 用于接收第二光束的主光束的第四光接收元件; 以及用于接收第二光束的子光束的第五和第六光接收元件。第一至第三光接收元件位于第一线上，第一光接收元件夹在第二和第三光接收元件之间。第四至第六光接收元件位于第二线上，第四光接收元件夹在第五和第六光接收元件之间。第一行和第二行彼此平行。

9. 发明申请

US20080159113A1 Optical Pickup Apparatus 审中-公开
标题翻译：光学拾取装置
公开(公告)号：US20080159113A1
公开(公告)日：2008-07-03
申请号：US11884207
申请日：2005-12-13
申请人： Masahiko Nishimoto , Yasuyuki Kochi , Shinichi Ijima , Takuya Okuda , Masayuki Ono
发明人： Masahiko Nishimoto , Yasuyuki Kochi , Shinichi Ijima , Takuya Okuda , Masayuki Ono
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/123
摘要： An optical pickup apparatus including three semiconductor laser devices which emit laser beams of different wavelengths, a beam splitter, a collimator lens, a hologram device, two light receiving devices, a diffraction grating-hologram device, an integrated substrate, a light detection/source unit and diffraction gratings, whereby the three semiconductor laser devices share the beam splitter and the collimator lens.
摘要翻译：一种光拾取装置，包括发射不同波长的激光束的三个半导体激光装置，分束器，准直透镜，全息装置，两个光接收装置，衍射光栅 - 全息图装置，集成基板，光检测/源单元和衍射光栅，由此三个半导体激光器件共享分束器和准直透镜。

10. 发明授权

US07830773B2 Optical pickup for recording and reproducing information with a plurality of types of optical information recording mediums 失效
标题翻译：用于利用多种类型的光学信息记录介质记录和再现信息的光学拾取器
公开(公告)号：US07830773B2
公开(公告)日：2010-11-09
申请号：US11667844
申请日：2005-09-16
申请人： Masahiko Nishimoto , Yasuyuki Kochi , Shinichi Ijima , Takuya Okuda , Masayuki Ono
发明人： Masahiko Nishimoto , Yasuyuki Kochi , Shinichi Ijima , Takuya Okuda , Masayuki Ono
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup device in which a hologram element has a plurality of different diffraction directions. In the tracking standard state, the hologram element is divided into six areas by a straight line connecting two strength center points of two light beams, and by two straight lines that are perpendicular to the straight line. By adding the amount of light received by an area demarcated by two straight lines that pass the two strength center points, to the amount of light received by one of two outer areas sandwiching the area depending on the type of the light beam, it is possible to obtain a well-balanced tracking error signal for each of the two light beams.
摘要翻译：一种其中全息元件具有多个不同衍射方向的光学拾取装置。在跟踪标准状态下，通过连接两个光束的两个强度中心点的直线和与直线垂直的两条直线将全息元件分成六个区域。通过将通过两个强度中心点的两条直线划分的区域所接收的光量相对于根据光束类型夹住该区域的两个外部区域之一接收的光量，可以以获得两个光束中的每一个的均衡的跟踪误差信号。

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