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：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：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：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：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：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：US07173898B2

公开(公告)日：2007-02-06

申请号：US10307979

申请日：2002-12-03

申请人： Noriaki Nishi ,  Kenji Yamamoto

发明人： Noriaki Nishi ,  Kenji Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0079 ,  G11B7/1263 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1395 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light source may be reduced for recording and reproduction, for optical recording media of different sorts, or for respective recording surfaces of a multi-layered optical recording medium, so that optimum characteristics may be realized even with use of an easy-to-fabricate light source or a light source with a smaller light output rating. The intensity of a light beam emitted on an optical recording medium 102 by an optical head 104 is controlled by optical coupling efficiency varying elements 214, 215 depending on the sort of the optical recording medium 102, recording surfaces of a multi-layered optical recording medium, recording surfaces in the multi-layered optical recording medium or on the operating modes, in such a manner that the intensity of the light beam emitted on the optical recording medium 102 may be significantly varied without drastically increasing the output power ratio on the side light source 212.

公开(公告)号：US20060164955A1

公开(公告)日：2006-07-27

申请号：US11387832

申请日：2006-03-24

申请人： Noriaki Nishi ,  Hiroaki Mizuma ,  Motoi Kimura ,  Kenji Yamamoto ,  Masatoshi Nishino

发明人： Noriaki Nishi ,  Hiroaki Mizuma ,  Motoi Kimura ,  Kenji Yamamoto ,  Masatoshi Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/128 ,  G11B7/1356 ,  G11B7/1369 ,  G11B7/1381

摘要： The light intensity of a light beam emitted from a light source is appropriately controlled when the light beam is transmitted through a variable optical coupling efficiency device in an optical head. During a read mode, the light beam from the light source is incident on an optical disk at an intensity relatively weaker than that of the light source. By switching the optical coupling efficiency of the variable optical coupling efficiency device between a write mode and a read mode, the light intensity directed to an optical recording medium is substantially varied from the write mode to the read mode. This arrangement eliminates the need for substantially increasing the optical output power ratio of the light source of write power to read power.

公开(公告)号：US20060140104A1

公开(公告)日：2006-06-29

申请号：US11288076

申请日：2005-11-29

申请人： Kenji Yamamoto ,  Noriaki Nishi

发明人： Kenji Yamamoto ,  Noriaki Nishi

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/127 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup adapted to operate for optical disks of a plurality of different types and an optical disk apparatus include a light source for emitting a first light beam with a wavelength matching a first optical disk or a second light beam with a wavelength matching a second optical disk, an objective lens for converging the first light beam or the second light beam emitted from the light source onto the recording surface of the first optical disk or the second optical disk, whichever appropriate, and a first aberration correcting means arranged on the light path of the first light beam between the light source and the objective lens to generate an aberration for canceling the coma arising due to the objective lens.

摘要翻译： 适于操作多种不同类型的光盘的光学拾取器和光盘装置包括用于发射具有与第一光盘匹配的波长的第一光束的光源或具有与第二光学器件相匹配的波长的第二光束 盘，用于将从光源发射的第一光束或第二光束会聚到第一光盘或第二光盘的记录表面上的任何一个适合的物镜;以及布置在光路上的第一像差校正装置 的第一光束在光源和物镜之间产生用于消除由于物镜引起的彗差的像差。

公开(公告)号：US20060023609A1

公开(公告)日：2006-02-02

申请号：US11182883

申请日：2005-07-18

申请人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

发明人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

IPC分类号： G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1398

摘要： An optical pickup apparatus includes a semiconductor laser for emitting laser light with a wavelength of at least from 400 nm to 415 nm and of which plane parallel to an active layer is located substantially in parallel to the recording surface of an optical recording medium and a reflection surface for reflecting laser light emitted from the semiconductor laser in the direction substantially perpendicular to the recording surface of the optical recording medium, the laser light being irradiated on the optical recording medium through an objective lens to record and/or reproduce the optical recording medium, wherein an angle θ formed between the direction of rays of light introduced into the reflection surface from the semiconductor laser and the direction in which recording tracks of the optical recording medium are extended is selected so as to satisfy: 45°≦θ

摘要翻译： 一种光学拾取装置包括用于发射波长为至少400nm至415nm的激光的半导体激光器，并且其平行于有源层的平面与光记录介质的记录表面基本平行的反射 表面，用于反射从半导体激光器沿与光学记录介质的记录表面大致垂直的方向发射的激光，激光通过物镜照射在光学记录介质上以记录和/或再现光学记录介质， 其中选择在从半导体激光器引入到反射表面中的光线的方向与光学记录介质的记录轨道延伸的方向之间形成的角度θ，以便满足：<？在线公式描述 =“在线公式”end =“lead”？> 45°<=θ<90°<？in-line-formula description =“In-line Formulas” 然后，在可以适用于包括具有BD（蓝光光盘）类型布置的光记录介质的光记录介质的光拾取装置和光记录和再现装置中，可能是可能的 通过用记录轨道上具有最佳轮廓的束斑照射光来保持令人满意的记录和再现特性。