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：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：US08953424B2

公开(公告)日：2015-02-10

申请号：US13485144

申请日：2012-05-31

申请人： Kimihiro Saito ,  Noriaki Nishi

发明人： Kimihiro Saito ,  Noriaki Nishi

IPC分类号： G11B7/00 ,  G11B7/09

CPC分类号： G11B7/0903

摘要： An optical-recording-medium driving apparatus includes: a light irradiating/receiving section configured to irradiate light on a medium so as to form a first side spot, a main spot, and a second side spot, and to receive reflection light from the individual spots; a first delay section configured to delay a light reception signal on the first side spot in accordance with a disposition interval between the first and the second side spots; a second delay section configured to delay a light reception signal on the main spot in accordance with a disposition interval between the main and second side spots; and a tracking-error-signal generation section configured to generate a tracking error signal on the basis of a correlation between delayed light reception signals on the first side spot and the main spot, and a correlation between the light reception signals on the second side spot and the main spot.

摘要翻译： 光记录介质驱动装置包括：光照射/接收部分，被配置为将光照射在介质上以形成第一侧光点，主光点和第二侧光斑，并且接收来自该个体的反射光 斑点 第一延迟部，被配置为根据第一和第二侧光斑之间的配置间隔延迟第一侧光点处的光接收信号; 第二延迟部，被配置为根据所述主侧和第二侧光斑之间的配置间隔延迟所述主光点上的光接收信号; 以及跟踪误差信号生成部，被配置为基于第一侧点的延迟光接收信号和主光点之间的相关性以及第二侧光点上的光接收信号之间的相关性来生成跟踪误差信号 和主要地点。

公开(公告)号：US20120320721A1

公开(公告)日：2012-12-20

申请号：US13485144

申请日：2012-05-31

申请人： Kimihiro Saito ,  Noriaki Nishi

发明人： Kimihiro Saito ,  Noriaki Nishi

IPC分类号： G11B7/00

CPC分类号： G11B7/0903

摘要： An optical-recording-medium driving apparatus includes: a light irradiating/receiving section configured to irradiate light on a medium so as to form a first side spot, a main spot, and a second side spot, and to receive reflection light from the individual spots; a first delay section configured to delay a light reception signal on the first side spot in accordance with a disposition interval between the first and the second side spots; a second delay section configured to delay a light reception signal on the main spot in accordance with a disposition interval between the main and second side spots; and a tracking-error-signal generation section configured to generate a tracking error signal on the basis of a correlation between delayed light reception signals on the first side spot and the main spot, and a correlation between the light reception signals on the second side spot and the main spot.

摘要翻译： 光记录介质驱动装置包括：光照射/接收部分，被配置为将光照射在介质上以形成第一侧光点，主光点和第二侧光斑，并且接收来自该个体的反射光 斑点 第一延迟部，被配置为根据第一和第二侧光斑之间的配置间隔延迟第一侧光点处的光接收信号; 第二延迟部，被配置为根据所述主侧和第二侧光斑之间的配置间隔延迟所述主光点上的光接收信号; 以及跟踪误差信号生成部，被配置为基于第一侧点的延迟光接收信号和主光点之间的相关性以及第二侧光点上的光接收信号之间的相关性来生成跟踪误差信号 和主要地点。

公开(公告)号：US07619959B2

公开(公告)日：2009-11-17

申请号：US10498008

申请日：2002-12-18

申请人： Noriaki Nishi ,  Masaru Tezuka ,  Naoki Inoue ,  Kunika Hashimoto

发明人： Noriaki Nishi ,  Masaru Tezuka ,  Naoki Inoue ,  Kunika Hashimoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/00 ,  G11B7/1356 ,  G11B7/1369 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical disk drive (101) for optically recording and/or reproducing information signals is provided in which the power of a light beam emitted from an optical head (104) to an optical disk (102) is controlled by an optical-coupling efficiency varying elements (214, 215) correspondingly to the type of the optical disk, recording layer in a multilayer optical disk and a mode of operation selected while a variation of the optical-coupling efficiency is being detected by a light-detecting element (216), thereby positively varying the optical-coupling efficiency in a minimum necessary time. Thus, the power of the light beam focused on the optical disk can be varied in a wide range without having to extremely raise the ratio in output power between modes of operation at a light source (212). Therefore, even a light source whose rating of optical output power is small can be used to write and read information signals to and from any of optical disks of different types or to each of recording layers in a multilayer optical disk with a high accuracy. Namely, good characteristics in writing and reading information signals can be assured without having to largely vary the ratio in output power of the light source from the write to read mode, from one to another type of optical disks or from one to another recording layer of the multilayer optical disk.

摘要翻译： 提供用于光学记录和/或再现信息信号的光盘驱动器（101），其中从光学头（104）发射到光盘（102）的光束的功率由光耦合效率变化 对应于光盘类型的元件（214,215），多层光盘中的记录层以及由光检测元件（216）检测光耦合效率的变化而选择的操作模式， 从而在最小必要时间内积极地改变光耦合效率。 因此，聚焦在光盘上的光束的功率可以在宽范围内变化，而不必极大地提高在光源（212）处的操作模式之间的输出功率的比率。 因此，即使是光输出功率等级较小的光源也可以用于从多个光盘中的不同类型的光盘或每个记录层以高精度写入信息信号和从多层光盘中的每个记录层读取信息信号。 即，可以确保写入和读取信息信号的良好特性，而不必大幅度地改变光源的输出功率与写入/读取模式之间的比例，从一个到另一个类型的光盘，或从一个到另一个记录层 多层光盘。

公开(公告)号：US07428201B2

公开(公告)日：2008-09-23

申请号：US10569370

申请日：2005-07-11

申请人： Takashi Nakao ,  Noriaki Nishi

发明人： Takashi Nakao ,  Noriaki Nishi

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/0903 ,  G11B7/0908 ,  G11B7/0945 ,  G11B7/126 ,  G11B7/131 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/0013

摘要： In the present invention, an optical pick-up (4) applies an optical beam to an optical disc (2) on which one or more information recording layers (20A) and (20B) are laminated in the direction of thickness through an objective lens (34) and detects a reflected light from one of the information recording layers laminated on the optical disc. A first photodetecting part (81) for detecting the reflected light from the one information recording layer and a second photodetecting part (82) composed of one or more light receiving surfaces for detecting a stray light from other information recording layers are mounted on a light receiving element (52). The number of the information recording layers laminated on the optical disc (2) is discriminated on the basis of the intensity of the stray light detected by the second photodetecting part (82). The optical pick-up (4) is controlled in accordance with the discriminated number of the information recording layers before a focus is controlled.

摘要翻译： 在本发明中，光学拾取器（4）将光束施加到光盘（2）上，其中一个或多个信息记录层（20A）和（20B）在厚度方向上通过一个 物镜（34），并检测层叠在光盘上的信息记录层之一的反射光。 用于检测来自一个信息记录层的反射光的第一光电检测部分（81）和由用于检测来自其它信息记录层的杂散光的一个或多个光接收表面组成的第二光电检测部分（82）安装在光接收 元件（52）。 基于由第二受光部（82）检测到的杂散光的强度来判别层叠在光盘（2）上的信息记录层的数量。 在控制焦点之前，根据所识别的信息记录层的数量来控制光学拾取器（4）。