公开(公告)号：US20110176403A1

公开(公告)日：2011-07-21

申请号：US12919395

申请日：2009-01-06

申请人： Hiroaki Yamamoto ,  Masayuki Ono ,  Masahiko Nishimoto

发明人： Hiroaki Yamamoto ,  Masayuki Ono ,  Masahiko Nishimoto

IPC分类号： G11B20/18

CPC分类号： G11B7/13922 ,  G11B7/094 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device includes a light source (30) configured to emit a light beam, a light collecting optical system configured to converge the light beam onto an information recording medium (10), a hologram element (20) configured to diffract the light beam reflected from the information recording medium (10), and a photodetector (40) having a plurality of detection regions configured to receive the light beam diffracted by the hologram element (20). The hologram element (20) has two diffraction regions (261 and 262) separated from each other by a straight line (260) extending in a radial direction of the information recording medium (10). At least one of the two diffraction regions has a pattern which introduces coma aberration in the radial direction. The light diffracted by the diffraction region having the coma aberration has coma aberration in the radial direction.

摘要翻译： 一种光学头装置，包括被配置为发射光束的光源（30），被配置为将光束会聚在信息记录介质（10）上的光收集光学系统;全息元件（20），被配置为衍射光束 从信息记录介质（10）反射的光检测器（40）和具有多个检测区域的光电检测器（40），被配置为接收由全息元件（20）衍射的光束。 全息元件（20）具有通过在信息记录介质（10）的径向延伸的直线（260）彼此分离的两个衍射区域（261和262）。 两个衍射区域中的至少一个具有在径向上引入彗形像差的图案。 由具有彗形像差的衍射区域衍射的光在径向具有彗差。

公开(公告)号：US20080101202A1

公开(公告)日：2008-05-01

申请号：US11826245

申请日：2007-07-13

申请人： Masahiko Nishimoto ,  Masayuki Ono ,  Hiroaki Yamamoto

发明人： Masahiko Nishimoto ,  Masayuki Ono ,  Hiroaki Yamamoto

IPC分类号： G11B7/09

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

摘要： An optical pickup includes a hologram element divided into four regions in a direction parallel to a tracking direction of an optical information recording medium and a direction perpendicular thereto. The hologram element allows two pairs of diffracted lights from two paired regions adjacent in parallel with the tracking direction to be made incident into light receiving elements so as to align in the direction perpendicular to the tracking direction.

摘要翻译： 光学拾取器包括在平行于光学信息记录介质的跟踪方向的方向和与其垂直的方向上划分为四个区域的全息元件。 全息元件允许与跟踪方向平行相邻的两个成对区域的两对衍射光入射到光接收元件中，以便在垂直于跟踪方向的方向上对齐。

公开(公告)号：US07535814B2

公开(公告)日：2009-05-19

申请号：US11704967

申请日：2007-02-12

申请人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

发明人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical pickup device includes a diffraction grating for separating a light beam from a semiconductor laser into at least three light beams. The diffraction grating is partitioned into five areas each having a given periodic structure: a first area; a second area adjacent to the first area in a first direction; a third area adjacent to the first and second areas in a second direction; a fourth area sandwiching the third area with the first area; and a fifth area adjacent to the fourth area in the first direction and sandwiching the third area with the second area. The phase of the periodic structure of each of the first and fifth areas is ahead of that of the third area by substantially 90°. The phase of the periodic structure of each of the second and fourth areas is behind that of the third area by substantially 90°.

摘要翻译： 光学拾取装置包括用于将来自半导体激光器的光束分离成至少三个光束的衍射光栅。 衍射光栅被划分成五个区域，每个区域具有给定的周期性结构：第一区域; 在第一方向上邻近所述第一区域的第二区域; 在第二方向上邻近所述第一和第二区域的第三区域; 第三个区域与第一个区域相区别; 以及与第一方向相邻的第四区域的第五区域，并且将第三区域与第二区域夹在中间。 第一和第五区域中的每一个的周期性结构的相位比第三区域的周期结构的相位大致90°。 第二区域和第四区域中的每一个的周期性结构的相位在第三区域的周期结构的相位之后大致为90°。

公开(公告)号：US20070297031A1

公开(公告)日：2007-12-27

申请号：US11709132

申请日：2007-02-22

申请人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono ,  Yasuyuki Kochi

发明人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono ,  Yasuyuki Kochi

IPC分类号： G02B5/32

CPC分类号： G02B5/32 ,  H01S5/005 ,  H01S5/02248 ,  H01S5/02296 ,  H01S5/0683

摘要： An optical pickup device includes a first semiconductor laser device, a second semiconductor laser device, a third semiconductor laser device, a first diffraction grating, a beam splitter, a quarter-wave plate, a collimator lens, a first polarization hologram device, a second polarization hologram device and a third polarization hologram device. The second semiconductor laser device and the third semiconductor laser device are provided in a light source/detection unit together with a second diffraction grating and photo-receiver groups, so as to make the optical pickup device compact.

摘要翻译： 光拾取装置包括第一半导体激光器件，第二半导体激光器件，第三半导体激光器件，第一衍射光栅，分束器，四分之一波片，准直透镜，第一偏振全息图器件，第二 偏振全息图装置和第三偏振全息图装置。 第二半导体激光器件和第三半导体激光器件与第二衍射光栅和光电接收器组一起设置在光源/检测单元中，以使光拾取器件紧凑。

公开(公告)号：US20060215508A1

公开(公告)日：2006-09-28

申请号：US11352648

申请日：2006-02-13

申请人： Naoki Nakanishi ,  Masayuki Ono ,  Masahiko Nishimoto ,  Tatsuya Nakamori

发明人： Naoki Nakanishi ,  Masayuki Ono ,  Masahiko Nishimoto ,  Tatsuya Nakamori

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/0956 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical semiconductor device both capable of recording and reproducing information with respect to plural optical disks having different track pitches and capable of shortening an assembly time and achieving a cost reduction without the need to make a highly-precise assembly adjustment is provided. An optical semiconductor device is constituted by a semiconductor laser element, an emitted light beam branching element for branching a light beam emitted from the semiconductor laser element into a main beam and a plurality of sub beams, an objective lens for focusing the main beam and the sub beams onto an optical disk, and a light-receiving element for signal detection for detecting each of the main beam and the sub beams reflected by the optical disk. Further, a light distribution of the sub beams branched by the emitted light beam branching element has a shape equal to or narrower in an optical disk radial direction than a shape obtained by bisecting a light distribution of the main beam when the sub beams enter the objective lens.

摘要翻译： 提供了能够记录和再现关于具有不同轨道间距的多个光盘的信息并能够缩短组装时间并且实现成本降低而不需要进行高精度组装调整的光学半导体器件。 光半导体器件由半导体激光元件，发射光束分支元件构成，用于将从半导体激光元件发射的光束分支成主光束和多个子光束，用于聚焦主光束的物镜和 子光束到光盘，以及用于信号检测的光接收元件，用于检测由光盘反射的主光束和子光束中的每一个。 此外，由发射光束分支元件分支的子光束的光分布具有与光束径向方向相等或更窄的形状，而不是当子光束进入物镜时将主光束的光分布平分得到的形状 镜片。

公开(公告)号：US20090168628A1

公开(公告)日：2009-07-02

申请号：US12065972

申请日：2007-03-08

申请人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

发明人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical pickup apparatus for use with a semiconductor laser which outputs a light beam, the optical pickup apparatus has; a diffraction grating for diffracting the light beam into diffracted light; a collimator lens for rendering the diffracted light diffracted by the diffraction grating as a parallel beam; an objective lens for focusing the parallel beam towards an optical information recording medium; a hologram element for diffracting return light reflected from the optical information recording medium; a plurality of light receiving elements for receiving the diffracted light diffracted by the hologram element; and an incidence preventing area placed between the hologram element and the light receiving elements for, in the case where the light beam is focused on the recording surface on a side close to the objective lens out of recording surfaces of multilayer of the optical information recording medium, substantially preventing reflected light from the recording surface on a side remote from the objective lens from entering the light receiving elements.

摘要翻译： 一种用于与输出光束的半导体激光器一起使用的光学拾取装置，该光学拾取装置具有： 用于将光束衍射成衍射光的衍射光栅; 用于使由衍射光栅衍射的衍射光作为平行光束的准直透镜; 用于将平行光束聚焦到光学信息记录介质的物镜; 用于衍射从光学信息记录介质反射的返回光的全息元件; 多个光接收元件，用于接收由全息元件衍射的衍射光; 以及放置在全息元件和光接收元件之间的入射防止区域，用于在光学信息记录介质的多层记录表面的光束聚焦在靠近物镜的一侧的记录表面上的情况下 基本上防止远离物镜的一侧的记录表面的反射光进入光接收元件。

公开(公告)号：US07539117B2

公开(公告)日：2009-05-26

申请号：US11498989

申请日：2006-08-04

申请人： Tatsuya Nakamori ,  Masayuki Ono ,  Naoki Nakanishi ,  Masahiko Nishimoto

发明人： Tatsuya Nakamori ,  Masayuki Ono ,  Naoki Nakanishi ,  Masahiko Nishimoto

IPC分类号： G11B7/00

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。

公开(公告)号：US20080074966A1

公开(公告)日：2008-03-27

申请号：US11660101

申请日：2005-09-21

申请人： Masayuki Ono ,  Masahiko Nishimoto ,  Tatsuya Nakamori ,  Naoki Nakanishi

发明人： Masayuki Ono ,  Masahiko Nishimoto ,  Tatsuya Nakamori ,  Naoki Nakanishi

IPC分类号： G11B7/002

CPC分类号： G11B7/0903 ,  G11B7/0941 ,  G11B7/1353

摘要： An optical pickup wherein a main beam and at least two sub-beams are collected on a disc and a tracking error signal is detected from push pull signals generated from each beam. A phase of the push pull signal generated from the first sub-beam is shifted from a phase of the push pull signal generated from the second sub-beam by substantially 180°. A phase difference is given to a part of the first sub-beam (10) and a part of the second sub-beam (11) by a diffraction optical element (2) which generates the first sub-beam (10) and the second sub-beam (11).

摘要翻译： 一种光学拾取器，其中主光束和至少两个子光束被收集在光盘上，并且从由每个光束产生的推挽信号检测跟踪误差信号。 从第一子光束产生的推挽信号的相位从从第二子光束产生的推挽信号的相位基本上偏离180°。 通过产生第一子光束（10）的衍射光学元件（2）向第一子光束（10）的一部分和第二子光束（11）的一部分提供相位差，并且第二子光束 子光束（11）。

公开(公告)号：US20070274367A1

公开(公告)日：2007-11-29

申请号：US11704967

申请日：2007-02-12

申请人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

发明人： Masahiko Nishimoto ,  Naoki Nakanishi ,  Masayuki Ono

IPC分类号： H01S3/08

CPC分类号： G11B7/1275 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical pickup device includes a diffraction grating for separating a light beam from a semiconductor laser into at least three light beams. The diffraction grating is partitioned into five areas each having a given periodic structure: a first area; a second area adjacent to the first area in a first direction; a third area adjacent to the first and second areas in a second direction; a fourth area sandwiching the third area with the first area; and a fifth area adjacent to the fourth area in the first direction and sandwiching the third area with the second area. The phase of the periodic structure of each of the first and fifth areas is ahead of that of the third area by substantially 90°. The phase of the periodic structure of each of the second and fourth areas is behind that of the third area by substantially 90°.

摘要翻译： 光学拾取装置包括用于将来自半导体激光器的光束分离成至少三个光束的衍射光栅。 衍射光栅被划分成五个区域，每个区域具有给定的周期性结构：第一区域; 在第一方向上邻近所述第一区域的第二区域; 在第二方向上邻近所述第一和第二区域的第三区域; 第三个区域与第一个区域相区别; 以及与第一方向相邻的第四区域的第五区域，并且将第三区域与第二区域夹在中间。 第一和第五区域中的每一个的周期性结构的相位比第三区域的周期结构的相位大致90°。 第二区域和第四区域中的每一个的周期性结构的相位在第三区域的周期结构的相位之后大致为90°。

公开(公告)号：US20080159113A1

公开(公告)日：2008-07-03

申请号：US11884207

申请日：2005-12-13

申请人： Masahiko Nishimoto ,  Yasuyuki Kochi ,  Shinichi Ijima ,  Takuya Okuda ,  Masayuki Ono

发明人： Masahiko Nishimoto ,  Yasuyuki Kochi ,  Shinichi Ijima ,  Takuya Okuda ,  Masayuki Ono

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： An optical pickup apparatus including three semiconductor laser devices which emit laser beams of different wavelengths, a beam splitter, a collimator lens, a hologram device, two light receiving devices, a diffraction grating-hologram device, an integrated substrate, a light detection/source unit and diffraction gratings, whereby the three semiconductor laser devices share the beam splitter and the collimator lens.

摘要翻译： 一种光拾取装置，包括发射不同波长的激光束的三个半导体激光装置，分束器，准直透镜，全息装置，两个光接收装置，衍射光栅 - 全息图装置，集成基板，光检测/源 单元和衍射光栅，由此三个半导体激光器件共享分束器和准直透镜。