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公开(公告)号：US20100238780A1
公开(公告)日：2010-09-23
申请号：US12791558
申请日：2010-06-01
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。
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公开(公告)号：US20100157778A1
公开(公告)日：2010-06-24
申请号：US12090563
申请日：2007-07-18
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。
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公开(公告)号：US07978586B2
公开(公告)日：2011-07-12
申请号：US12090385
申请日：2007-07-18
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。
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公开(公告)号：US20100177618A1
公开(公告)日：2010-07-15
申请号：US12090385
申请日：2007-07-18
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。
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公开(公告)号：US07751297B2
公开(公告)日：2010-07-06
申请号：US12303578
申请日：2007-09-06
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。
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公开(公告)号：US07940631B2
公开(公告)日：2011-05-10
申请号：US12090563
申请日：2007-07-18
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。
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公开(公告)号：US07898927B2
公开(公告)日：2011-03-01
申请号：US12791558
申请日：2010-06-01
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。
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公开(公告)号：US20100014411A1
公开(公告)日：2010-01-21
申请号：US12303578
申请日：2007-09-06
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.
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公开(公告)号：US20090168626A1
公开(公告)日：2009-07-02
申请号：US12236048
申请日：2008-09-23
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。
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公开(公告)号：US20070030788A1
公开(公告)日：2007-02-08
申请号：US11498989
申请日：2006-08-04
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903
摘要： An optical pickup has a semiconductor laser, a diffractive optical element that has first diffraction regions and second diffraction regions and diffracts a beam emitted by the semiconductor laser, an objective lens that focuses the diffracted beam on an optical disc, and a detection unit that detects a tracking error signal using the diffracted beam reflected by the optical disc. When a zero order diffraction beam is focused on the optical disc, a first order diffraction beam is diffracted by the first diffraction regions to be focused at a position between the objective lens and the optical disc, and diffracted by the second diffraction regions to be focused at a position beyond the optical disc. The first order diffraction beam has a beam width that, on the optical disc in a radial direction thereof, is two times or greater a track pitch of the optical disc.
摘要翻译： 光拾取器具有半导体激光器，具有第一衍射区域和第二衍射区域并衍射由半导体激光器发射的光束的衍射光学元件，将衍射光束聚焦在光盘上的物镜，以及检测单元，其检测 使用由光盘反射的衍射光束的跟踪误差信号。 当零级衍射光束聚焦在光盘上时，第一级衍射光束被第一衍射区域衍射以被聚焦在物镜和光盘之间的位置处，并被第二衍射区域衍射以被聚焦 在超过光盘的位置。 第一级衍射光束具有光盘宽度，该光束宽度在光盘的径向方向上是光盘的光道间距的两倍或更大。
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