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1. 发明申请

US20100238780A1 OPTICAL PICKUP DEVICE 有权
标题翻译：光学拾取器件
公开(公告)号：US20100238780A1
公开(公告)日：2010-09-23
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： G11B7/135
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.
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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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.

9. 发明申请

US20080101202A1 Optical pickup 审中-公开
标题翻译：光学拾音
公开(公告)号：US20080101202A1
公开(公告)日：2008-05-01
申请号：US11826245
申请日：2007-07-13
申请人： Masahiko Nishimoto , Masayuki Ono , Hiroaki Yamamoto
发明人： Masahiko Nishimoto , Masayuki Ono , Hiroaki Yamamoto
IPC分类号： G11B7/09
CPC分类号： G11B7/1353 , G11B7/0903 , G11B2007/0006 , G11B2007/0013
摘要： An optical pickup includes a hologram element divided into four regions in a direction parallel to a tracking direction of an optical information recording medium and a direction perpendicular thereto. The hologram element allows two pairs of diffracted lights from two paired regions adjacent in parallel with the tracking direction to be made incident into light receiving elements so as to align in the direction perpendicular to the tracking direction.
摘要翻译：光学拾取器包括在平行于光学信息记录介质的跟踪方向的方向和与其垂直的方向上划分为四个区域的全息元件。全息元件允许与跟踪方向平行相邻的两个成对区域的两对衍射光入射到光接收元件中，以便在垂直于跟踪方向的方向上对齐。

10. 发明申请

US20110176403A1 OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING DEVICE, AND SIGNAL DETECTION METHOD 审中-公开
标题翻译：光学头装置，光信息处理装置和信号检测方法
公开(公告)号：US20110176403A1
公开(公告)日：2011-07-21
申请号：US12919395
申请日：2009-01-06
申请人： Hiroaki Yamamoto , Masayuki Ono , Masahiko Nishimoto
发明人： Hiroaki Yamamoto , Masayuki Ono , Masahiko Nishimoto
IPC分类号： G11B20/18
CPC分类号： G11B7/13922 , G11B7/094 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical head device includes a light source (30) configured to emit a light beam, a light collecting optical system configured to converge the light beam onto an information recording medium (10), a hologram element (20) configured to diffract the light beam reflected from the information recording medium (10), and a photodetector (40) having a plurality of detection regions configured to receive the light beam diffracted by the hologram element (20). The hologram element (20) has two diffraction regions (261 and 262) separated from each other by a straight line (260) extending in a radial direction of the information recording medium (10). At least one of the two diffraction regions has a pattern which introduces coma aberration in the radial direction. The light diffracted by the diffraction region having the coma aberration has coma aberration in the radial direction.
摘要翻译：一种光学头装置，包括被配置为发射光束的光源（30），被配置为将光束会聚在信息记录介质（10）上的光收集光学系统;全息元件（20），被配置为衍射光束从信息记录介质（10）反射的光检测器（40）和具有多个检测区域的光电检测器（40），被配置为接收由全息元件（20）衍射的光束。全息元件（20）具有通过在信息记录介质（10）的径向延伸的直线（260）彼此分离的两个衍射区域（261和262）。两个衍射区域中的至少一个具有在径向上引入彗形像差的图案。由具有彗形像差的衍射区域衍射的光在径向具有彗差。

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