公开(公告)号：US08259553B2

公开(公告)日：2012-09-04

申请号：US12703294

申请日：2010-02-10

申请人： Fumiaki Nakano ,  Nobuhiko Ando ,  Noriaki Nishi ,  Takashi Nakao ,  Hiroaki Nakagawa ,  Yutaka Tentaku

发明人： Fumiaki Nakano ,  Nobuhiko Ando ,  Noriaki Nishi ,  Takashi Nakao ,  Hiroaki Nakagawa ,  Yutaka Tentaku

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/131 ,  G11B2007/0013

摘要： An optical pickup includes: a light source outputting a light beam; an objective lens collecting the light beam on a target recording layer as a target of plural recording layers provided in an optical disc; a lens moving unit moving the objective lens in a tracking direction nearly orthogonal to track grooves helically or coaxially formed in the target recording layer; a collective lens collecting a reflected light beam formed when the light beam is reflected by the optical disc; a diffraction optical element diffracting part of the reflected first-order light beam in predetermined directions as first, second, third and fourth beams; and a photodetector receiving the first and second beams using first and second light receiving areas, and generating light reception signals, and receiving the third and fourth beams using third and fourth light receiving areas, and generates light reception signals.

摘要翻译： 光拾取器包括：输出光束的光源; 将目标记录层上的光束收集成设置在光盘中的多个记录层的目标物的物镜; 透镜移动单元，沿跟踪方向移动所述物镜，所述跟踪方向与所述目标记录层中螺旋或同轴地形成的轨道槽几乎正交; 收集当光束被光盘反射时形成的反射光束的集体透镜; 衍射光学元件将预定方向的反射一次光束的一部分衍射为第一，第二，第三和第四光束; 以及光电检测器，其使用第一和第二光接收区域接收第一和第二光束，并且产生光接收信号，并且使用第三和第四光接收区域接收第三和第四光束，并且产生光接收信号。

公开(公告)号：US08000189B2

公开(公告)日：2011-08-16

申请号：US12501834

申请日：2009-07-13

申请人： Takashi Nakao ,  Fumiaki Nakano ,  Noriaki Nishi ,  Nobuhiko Ando ,  Hiroaki Nakagawa ,  Yutaka Tentaku

发明人： Takashi Nakao ,  Fumiaki Nakano ,  Noriaki Nishi ,  Nobuhiko Ando ,  Hiroaki Nakagawa ,  Yutaka Tentaku

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup includes: a light source that emits a light beam; an object lens that condenses the light beam on a target recording layer of an optical disk; a lens moving unit; a condensing lens; a hologram element that diffracts, in diffracting a reflected light beam and separating it into reflected zeroth-order and first-order light beams, parts of the reflected first-order light beam in a first direction and sets them as first and second beams, diffracts parts of the reflected first-order light beam in a second direction and sets them as third and fourth beams; and a photodetector that receives the first and second beams and the third and fourth beams and generates light reception signals, and receives interlayer stray light of a part of the light beam reflected by the other recording layers other than the target recording layer and generates a stray light reception signal.

摘要翻译： 光拾取器包括：发射光束的光源; 将光束聚光在光盘的目标记录层上的物镜; 透镜移动单元; 聚光透镜; 衍射衍射反射光束并将其分离成反射的零级和一级光束的全息元件，将反射的一级光束的第一方向的部分设置为第一和第二光束，衍射 反射的一级光束的一部分在第二方向上并将其设置为第三和第四光束; 以及光电检测器，其接收第一和第二光束以及第三和第四光束并产生光接收信号，并且接收由目标记录层以外的其它记录层反射的部分光束的层间杂散光，并产生杂散 光接收信号。

公开(公告)号：US20100214902A1

公开(公告)日：2010-08-26

申请号：US12703294

申请日：2010-02-10

申请人： Fumiaki Nakano ,  Nobuhiko Ando ,  Noriaki Nishi ,  Takashi Nakao ,  Hiroaki Nakagawa ,  Yutaka Tentaku

发明人： Fumiaki Nakano ,  Nobuhiko Ando ,  Noriaki Nishi ,  Takashi Nakao ,  Hiroaki Nakagawa ,  Yutaka Tentaku

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/131 ,  G11B2007/0013

摘要： An optical pickup includes: a light source outputting a light beam; an objective lens collecting the light beam on a target recording layer as a target of plural recording layers provided in an optical disc; a lens moving unit moving the objective lens in a tracking direction nearly orthogonal to track grooves helically or coaxially formed in the target recording layer; a collective lens collecting a reflected light beam formed when the light beam is reflected by the optical disc; a diffraction optical element diffracting part of the reflected first-order light beam in predetermined directions as first, second, third and fourth beams; and a photodetector receiving the first and second beams using first and second light receiving areas, and generating light reception signals, and receiving the third and fourth beams using third and fourth light receiving areas, and generates light reception signals.

摘要翻译： 光拾取器包括：输出光束的光源; 将目标记录层上的光束收集成设置在光盘中的多个记录层的目标物的物镜; 透镜移动单元，沿跟踪方向移动所述物镜，所述跟踪方向与所述目标记录层中螺旋或同轴地形成的轨道槽几乎正交; 收集当光束被光盘反射时形成的反射光束的集体透镜; 衍射光学元件将预定方向的反射一次光束的一部分衍射为第一，第二，第三和第四光束; 以及光电检测器，其使用第一和第二光接收区域接收第一和第二光束，并且产生光接收信号，并且使用第三和第四光接收区域接收第三和第四光束，并且产生光接收信号。

公开(公告)号：US07889621B2

公开(公告)日：2011-02-15

申请号：US11871420

申请日：2007-10-12

申请人： Noriaki Nishi ,  Kenji Yamamoto ,  Takahiro Miyagi ,  Fumiaki Nakano

发明人： Noriaki Nishi ,  Kenji Yamamoto ,  Takahiro Miyagi ,  Fumiaki Nakano

IPC分类号： G11B7/00

CPC分类号： G02B7/023 ,  G02B7/021 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/121 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/22 ,  G11B2007/0006

摘要： An objective lens device includes: a first objective lens having a first numerical aperture, which can condense light into a disc-shaped first optical recording medium including a first cover layer of first thickness; a second objective lens having a second numerical aperture which is smaller than the first numerical aperture, which can condense light into a disc-shaped second optical recording medium including a second cover layer of second thickness which is thicker than the first thickness; a third objective lens having a third numerical aperture which is smaller than the second numerical aperture, which can condense light into a disc-shaped third optical recording medium including a third cover layer of third thickness which is thicker than the second thickness; and a lens holder configured to integrally hold the first, second, and third objective lenses.

摘要翻译： 一种物镜装置，包括：具有第一数值孔径的第一物镜，其可以将光冷凝成包括第一厚度的第一覆盖层的盘状第一光学记录介质; 具有小于第一数值孔径的第二数值孔径的第二物镜，其可以将光冷凝成包括比第一厚度厚的第二厚度的第二覆盖层的盘形第二光学记录介质; 具有小于第二数值孔径的第三数值孔径的第三物镜，其可以将光冷凝成包括第三厚度比第二厚度厚的第三覆盖层的盘状第三光学记录介质; 以及透镜保持器，其构造成一体地保持第一，第二和第三物镜。

公开(公告)号：US20070164241A1

公开(公告)日：2007-07-19

申请号：US11619841

申请日：2007-01-04

申请人： Fumiaki Nakano ,  Noriaki Nishi

发明人： Fumiaki Nakano ,  Noriaki Nishi

IPC分类号： G01N21/86 ,  G01V8/00

CPC分类号： G11B7/1367 ,  G11B7/0906 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1381

摘要： An optical pickup includes a detector, a plurality of light guiding units, and a switching controller. The detector detects, using a plurality of detection areas, a reflected light beam that is emitted from a predetermined light source and is reflected off an optical recording medium. Each of the light guiding units has a specific light guide pattern and inputs a predetermined part of the reflected light beam to a predetermined detection area in accordance with the light guide pattern. The switching controller switches and selects the light guiding unit that acts on the reflected light beam from among the plurality of light guiding units according to a predetermined switching condition.

摘要翻译： 光拾取器包括检测器，多个导光单元和开关控制器。 检测器使用多个检测区域检测从预定光源发射并从光记录介质反射的反射光束。 每个导光单元具有特定的光导图案，并且根据导光图案将预定部分的反射光束输入到预定的检测区域。 切换控制器根据预定的切换条件切换并选择作用于多个导光单元中的反射光束的导光单元。

公开(公告)号：US07693025B2

公开(公告)日：2010-04-06

申请号：US11619841

申请日：2007-01-04

申请人： Fumiaki Nakano ,  Noriaki Nishi

发明人： Fumiaki Nakano ,  Noriaki Nishi

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/0906 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1381

摘要： An optical pickup includes a detector, a plurality of light guiding units, and a switching controller. The detector detects, using a plurality of detection areas, a reflected light beam that is emitted from a predetermined light source and is reflected off an optical recording medium. Each of the light guiding units has a specific light guide pattern and inputs a predetermined part of the reflected light beam to a predetermined detection area in accordance with the light guide pattern. The switching controller switches and selects the light guiding unit that acts on the reflected light beam from among the plurality of light guiding units according to a predetermined switching condition.

摘要翻译： 光拾取器包括检测器，多个导光单元和开关控制器。 检测器使用多个检测区域检测从预定光源发射并从光记录介质反射的反射光束。 每个导光单元具有特定的光导图案，并且根据导光图案将预定部分的反射光束输入到预定的检测区域。 切换控制器根据预定的切换条件切换并选择作用于多个导光单元中的反射光束的导光单元。

公开(公告)号：US20080279060A1

公开(公告)日：2008-11-13

申请号：US11871420

申请日：2007-10-12

申请人： Noriaki NISHI ,  Kenji Yamamoto ,  Takahiro Miyagi ,  Fumiaki Nakano

发明人： Noriaki NISHI ,  Kenji Yamamoto ,  Takahiro Miyagi ,  Fumiaki Nakano

IPC分类号： G11B7/00 ,  G02B7/14

CPC分类号： G02B7/023 ,  G02B7/021 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/121 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/22 ,  G11B2007/0006

摘要： An objective lens device includes: a first objective lens having a first numerical aperture, which can condense light into a disc-shaped first optical recording medium including a first cover layer of first thickness; a second objective lens having a second numerical aperture which is smaller than the first numerical aperture, which can condense light into a disc-shaped second optical recording medium including a second cover layer of second thickness which is thicker than the first thickness; a third objective lens having a third numerical aperture which is smaller than the second numerical aperture, which can condense light into a disc-shaped third optical recording medium including a third cover layer of third thickness which is thicker than the second thickness; and a lens holder configured to integrally hold the first, second, and third objective lenses.

摘要翻译： 一种物镜装置，包括：具有第一数值孔径的第一物镜，其可以将光冷凝成包括第一厚度的第一覆盖层的盘状第一光学记录介质; 具有小于第一数值孔径的第二数值孔径的第二物镜，其可以将光冷凝成包括比第一厚度厚的第二厚度的第二覆盖层的盘形第二光学记录介质; 具有小于第二数值孔径的第三数值孔径的第三物镜，其可以将光冷凝成包括第三厚度比第二厚度厚的第三覆盖层的盘状第三光学记录介质; 以及透镜保持器，其构造成一体地保持第一，第二和第三物镜。

公开(公告)号：US08107347B2

公开(公告)日：2012-01-31

申请号：US12657260

申请日：2010-01-15

申请人： Tetsuya Inoue ,  Fumiaki Nakano

发明人： Tetsuya Inoue ,  Fumiaki Nakano

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/1353 ,  G11B2007/0013

摘要： There is provided an optical disk apparatus causing a hologram device to diffract a reflected light beam and causes each of reflected light beams of primary light in a longitudinal direction to generate received light signals by receiving the reflected light beams through receiving regions of a receiving unit before a preformatted signal being generated by a signal processing unit based on the received light signals. Therefore, the preformatted signal that excludes an influence of a stray light pattern by an interlayer stray light beam from a plurality of recording layers can be generated.

摘要翻译： 提供了一种光盘装置，其使全息装置衍射反射的光束，并且通过在接收单元的接收区域之前接收反射的光束，使原始光的每个反射光沿纵向方向产生接收的光信号。 基于所接收的光信号由信号处理单元产生的预格式化信号。 因此，可以产生排除来自多个记录层的层间杂散光束对杂散光图案的影响的预格式化信号。

公开(公告)号：US20100182889A1

公开(公告)日：2010-07-22

申请号：US12657260

申请日：2010-01-15

申请人： Tetsuya Inoue ,  Fumiaki Nakano

发明人： Tetsuya Inoue ,  Fumiaki Nakano

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/1353 ,  G11B2007/0013

摘要： There is provided an optical disk apparatus causing a hologram device to diffract a reflected light beam and causes each of reflected light beams of primary light in a longitudinal direction to generate received light signals by receiving the reflected light beams through receiving regions of a receiving unit before a preformatted signal being generated by a signal processing unit based on the received light signals. Therefore, the preformatted signal that excludes an influence of a stray light pattern by an interlayer stray light beam from a plurality of recording layers can be generated.

摘要翻译： 提供了一种光盘装置，其使全息装置衍射反射的光束，并且通过在接收单元的接收区域之前接收反射的光束，使原始光的每个反射光沿纵向方向产生接收的光信号。 基于所接收的光信号由信号处理单元产生的预格式化信号。 因此，可以产生排除来自多个记录层的层间杂散光束对杂散光图案的影响的预格式化信号。