公开(公告)号：US08400901B2

公开(公告)日：2013-03-19

申请号：US13537555

申请日：2012-06-29

申请人： Masahito Ogata ,  Masayuki Yoshie

发明人： Masahito Ogata ,  Masayuki Yoshie

IPC分类号： G11B7/00

CPC分类号： G11B7/0943 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the laser light entered into two first areas and into two second areas to four positions different from each other. The light separating element imparts a light separating function to the laser light entered into the first two areas in directions identical to each other and with magnitudes different from each other, and imparts a light separating function to the laser light entered into the two second areas in directions identical to each other and with magnitudes different from each other.

摘要翻译： 散光元件将激光会聚在第一方向上，用于产生第一焦线，并且在垂直于第一方向的第二方向上会聚激光，以产生第二焦线。 光分离元件将进入两个第一区域的激光引导到彼此不同的两个第二区域到四个位置。 光分离元件将光分离功能赋予彼此相同并且具有彼此不同的大小的方向进入前两个区域的激光，并且将光分离功能赋予进入两个第二区域的激光 方向彼此相同并且具有彼此不同的大小。

公开(公告)号：US20120002533A1

公开(公告)日：2012-01-05

申请号：US13174239

申请日：2011-06-30

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： A spectral element separates first laser light in such a manner that an area including only signal light as reflected first laser light is formed on a photodetector. The photodetector is provided with a first sensor group which is disposed at an irradiation position of signal light of the separated first laser light, and a second sensor group which receives zero-th order diffraction light of a main beam and two sub beams of second laser light that has been transmitted through the spectral element. The second sensor group includes a four-divided sensor which receives the main beam. The four-divided sensor is disposed in an area surrounded by the first sensor group. Zero-th order diffraction light of the first laser light that has been transmitted through the spectral element is irradiated onto the four-divided sensor.

摘要翻译： 光谱元件以这样的方式分离第一激光，即在光电检测器上形成仅包括作为反射的第一激光的信号光的区域。 光电检测器设置有第一传感器组，其设置在分离的第一激光的信号光的照射位置处，以及第二传感器组，其接收主光束的零级衍射光和第二激光的两个子光束 通过光谱元素传输的光。 第二传感器组包括接收主光束的四分割传感器。 四分割传感器设置在由第一传感器组包围的区域中。 通过光谱元件透射的第一激光的零级衍射光被照射到四分割传感器上。

公开(公告)号：US08358571B2

公开(公告)日：2013-01-22

申请号：US13191794

申请日：2011-07-27

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup device has an astigmatism element which imparts astigmatism to reflected light of laser light reflected on a recording layer, and a spectral element into which the reflected light is entered, and which separates the reflected light. The spectral element is divided into four third areas by a first area having a certain width and formed along a straight line in parallel to a first direction, and by a second area having a certain width and formed along a straight line in parallel to a second direction. The spectral element is configured to guide the reflected light passing through the four third areas to respective corresponding sensors on a photodetector while making propagating directions of the reflected light different from each other, and to avoid guiding the reflected light entered into the first area and into the second area to the sensors.

摘要翻译： 一种光学拾取装置具有散光元件，其对记录层上反射的激光的反射光和向反射光入射的光谱元件赋予散光，并分离反射光。 光谱元件被具有一定宽度的第一区域分成四个第三区域，并且沿着与第一方向平行的直线形成，并且具有一定宽度的第二区域，并且沿着与第二区域平行的直线形成 方向。 光谱元件被配置为在使反射光的传播方向彼此不同的同时将通过四个第三区域的反射光引导到光电检测器上的各个对应的传感器，并且避免引导入射到第一区域中的反射光并进入 传感器的第二个区域。

公开(公告)号：US20130003516A1

公开(公告)日：2013-01-03

申请号：US13537555

申请日：2012-06-29

申请人： Masahito Ogata ,  Masayuki Yoshie

发明人： Masahito Ogata ,  Masayuki Yoshie

IPC分类号： G11B7/1374 ,  G11B7/1353

CPC分类号： G11B7/0943 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the laser light entered into two first areas and into two second areas to four positions different from each other. The light separating element imparts a light separating function to the laser light entered into the first two areas in directions identical to each other and with magnitudes different from each other, and imparts a light separating function to the laser light entered into the two second areas in directions identical to each other and with magnitudes different from each other.

摘要翻译： 散光元件将激光会聚在第一方向上，用于产生第一焦线，并且在垂直于第一方向的第二方向上会聚激光，以产生第二焦线。 光分离元件将进入两个第一区域的激光引导到彼此不同的两个第二区域到四个位置。 光分离元件将光分离功能赋予彼此相同并且具有彼此不同的大小的方向进入前两个区域的激光，并且将光分离功能赋予进入两个第二区域的激光 方向彼此相同并且具有彼此不同的大小。

公开(公告)号：US08432783B2

公开(公告)日：2013-04-30

申请号：US13537593

申请日：2012-06-29

申请人： Masahito Ogata ,  Masayuki Yoshie

发明人： Masahito Ogata ,  Masayuki Yoshie

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/22 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the laser light entered into two first areas and into two second areas to four respective positions different from each other, and guides the laser light entered into a third area to a position different from the four positions. When an intersection of two straight lines extending in parallel to the first direction and the second direction and intersecting with each other is aligned with an optical axis of the laser light, the third area is disposed at the intersection of the two straight lines.

摘要翻译： 散光元件将激光会聚在第一方向上，用于产生第一焦线，并且在垂直于第一方向的第二方向上会聚激光，以产生第二焦线。 光分离元件将进入两个第一区域的激光引导到彼此不同的四个相应位置的两个第二区域中，并将进入第三区域的激光引导到与四个位置不同的位置。 当与第一方向和第二方向平行延伸并彼此相交的两条直线的交点与激光的光轴对准时，第三区域设置在两条直线的交点处。

公开(公告)号：US08331211B2

公开(公告)日：2012-12-11

申请号：US13186833

申请日：2011-07-20

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup device has an astigmatism element which imparts astigmatism to reflected light of laser light reflected on a recording layer, and a spectral element into which the reflected light is entered, and which separates the reflected light. The spectral element is divided into six second areas by a straight line in parallel to a first direction, a straight line in parallel to a second direction, and a first area having a predetermined width and formed along a straight line in parallel to a third direction inclined from the first direction by 45 degrees. The spectral element is configured to guide the reflected light passing through the six second areas to corresponding sensors on a photodetector while making propagating directions of the reflected light different from each other, and to avoid guiding the reflected light entered into the first area to the sensors.

摘要翻译： 一种光学拾取装置具有散光元件，其对记录层上反射的激光的反射光和向反射光入射的光谱元件赋予散光，并分离反射光。 光谱元件通过与第一方向平行的直线分成六个第二区域，平行于第二方向的直线和具有预定宽度并沿着与第三方向平行的直线形成的第一区域 从第一个方向倾斜45度。 光谱元件被配置为将反射光通过六个第二区域的反射光引导到光电检测器上的相应传感器，同时使反射光的传播方向彼此不同，并且避免将进入第一区域的反射光引导到传感器 。

公开(公告)号：US08325580B2

公开(公告)日：2012-12-04

申请号：US13174239

申请日：2011-06-30

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： A spectral element separates first laser light in such a manner that an area including only signal light as reflected first laser light is formed on a photodetector. The photodetector is provided with a first sensor group which is disposed at an irradiation position of signal light of the separated first laser light, and a second sensor group which receives zero-th order diffraction light of a main beam and two sub beams of second laser light that has been transmitted through the spectral element. The second sensor group includes a four-divided sensor which receives the main beam. The four-divided sensor is disposed in an area surrounded by the first sensor group. Zero-th order diffraction light of the first laser light that has been transmitted through the spectral element is irradiated onto the four-divided sensor.

摘要翻译： 光谱元件以这样的方式分离第一激光，即在光电检测器上形成仅包括作为反射的第一激光的信号光的区域。 光电检测器设置有第一传感器组，其设置在分离的第一激光的信号光的照射位置处，以及第二传感器组，其接收主光束的零级衍射光和第二激光的两个子光束 通过光谱元素传输的光。 第二传感器组包括接收主光束的四分割传感器。 四分割传感器设置在由第一传感器组包围的区域中。 通过光谱元件透射的第一激光的零级衍射光被照射到四分割传感器上。

公开(公告)号：US20130003519A1

公开(公告)日：2013-01-03

申请号：US13537593

申请日：2012-06-29

申请人： Masahito Ogata ,  Masayuki Yoshie

发明人： Masahito Ogata ,  Masayuki Yoshie

IPC分类号： G11B7/135

CPC分类号： G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/22 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the laser light entered into two first areas and into two second areas to four respective positions different from each other, and guides the laser light entered into a third area to a position different from the four positions. When an intersection of two straight lines extending in parallel to the first direction and the second direction and intersecting with each other is aligned with an optical axis of the laser light, the third area is disposed at the intersection of the two straight lines.

摘要翻译： 散光元件将激光会聚在第一方向上，用于产生第一焦线，并且在垂直于第一方向的第二方向上会聚激光，以产生第二焦线。 光分离元件将进入两个第一区域的激光引导到彼此不同的四个相应位置的两个第二区域中，并将进入第三区域的激光引导到与四个位置不同的位置。 当与第一方向和第二方向平行延伸并彼此相交的两条直线的交点与激光的光轴对准时，第三区域设置在两条直线的交点处。

公开(公告)号：US20120026858A1

公开(公告)日：2012-02-02

申请号：US13191794

申请日：2011-07-27

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/135

CPC分类号： G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup device has an astigmatism element which imparts astigmatism to reflected light of laser light reflected on a recording layer, and a spectral element into which the reflected light is entered, and which separates the reflected light. The spectral element is divided into four third areas by a first area having a certain width and formed along a straight line in parallel to a first direction, and by a second area having a certain width and formed along a straight line in parallel to a second direction. The spectral element is configured to guide the reflected light passing through the four third areas to respective corresponding sensors on a photodetector while making propagating directions of the reflected light different from each other, and to avoid guiding the reflected light entered into the first area and into the second area to the sensors.

摘要翻译： 一种光学拾取装置具有散光元件，其对记录层上反射的激光的反射光和向反射光入射的光谱元件赋予散光，并分离反射光。 光谱元件通过具有一定宽度的第一区域被分成四个第三区域，并且沿着与第一方向平行的直线形成，并且具有一定宽度的第二区域，并且沿着与第二区域平行的直线形成 方向。 光谱元件被配置为在使反射光的传播方向彼此不同的同时将通过四个第三区域的反射光引导到光电检测器上的各个对应的传感器，并且避免引导入射到第一区域中的反射光并进入 传感器的第二个区域。

公开(公告)号：US20120026857A1

公开(公告)日：2012-02-02

申请号：US13186833

申请日：2011-07-20

申请人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

发明人： Kenji Nagatomi ,  Shinsei Kasahara ,  Shigeharu Shirane ,  Masayuki Yoshie

IPC分类号： G11B7/135

CPC分类号： G11B7/1378 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup device has an astigmatism element which imparts astigmatism to reflected light of laser light reflected on a recording layer, and a spectral element into which the reflected light is entered, and which separates the reflected light. The spectral element is divided into six second areas by a straight line in parallel to a first direction, a straight line in parallel to a second direction, and a first area having a predetermined width and formed along a straight line in parallel to a third direction inclined from the first direction by 45 degrees. The spectral element is configured to guide the reflected light passing through the six second areas to corresponding sensors on a photodetector while making propagating directions of the reflected light different from each other, and to avoid guiding the reflected light entered into the first area to the sensors.

摘要翻译： 一种光学拾取装置具有散光元件，其对记录层上反射的激光的反射光和向反射光入射的光谱元件赋予散光，并分离反射光。 光谱元件通过与第一方向平行的直线分成六个第二区域，平行于第二方向的直线和具有预定宽度并沿着与第三方向平行的直线形成的第一区域 从第一个方向倾斜45度。 光谱元件被配置为将反射光通过六个第二区域的反射光引导到光电检测器上的相应传感器，同时使反射光的传播方向彼此不同，并且避免将进入第一区域的反射光引导到传感器 。