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1. 发明申请

US20080074966A1 Optical Pickup 审中-公开
标题翻译：光学拾音
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）。

2. 发明申请

US20070030788A1 Optical pickup 失效
标题翻译：光学拾音
公开(公告)号：US20070030788A1
公开(公告)日：2007-02-08
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： G11B7/135
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。

3. 发明申请

US20060215508A1 Optical semiconductor device 审中-公开
标题翻译：光半导体器件
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。

4. 发明授权

US07539117B2 Optical pickup 失效
标题翻译：光学拾音
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。

5. 发明申请

US20070274367A1 Optical pickup device 有权
标题翻译：光学拾取装置
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°。

6. 发明授权

US07535814B2 Optical pickup device 有权
标题翻译：光学拾取装置
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°。

7. 发明申请

US20070297031A1 Optical pickup device 审中-公开
标题翻译：光学拾取装置
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。

8. 发明申请

US20090168628A1 OPTICAL PICKUP APPARATUS 审中-公开
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。

9. 发明授权

US07313061B2 Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals 有权
标题翻译：具有多个光电检测器的光学拾取器被分成用于获得焦点和跟踪误差信号的四个区域
公开(公告)号：US07313061B2
公开(公告)日：2007-12-25
申请号：US10527084
申请日：2003-09-08
申请人： Masahiko Nishimoto , Shinichi Hamaguchi , Tatsuya Nakamori , Yasuyuki Kochi
发明人： Masahiko Nishimoto , Shinichi Hamaguchi , Tatsuya Nakamori , Yasuyuki Kochi
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/123 , G11B7/131 , G11B7/133 , G11B7/1353
摘要： An optical pickup comprises: first and second semiconductor lasers (11, 14); a hologram element (17) for diffracting light reflected by an optical information recording medium (9 or 12); and a plurality of photodetectors (18-23). The hologram element (17) has two or more different diffraction regions. The plurality of photodetectors (18-23) are provided away from the first and second semiconductor lasers (11, 14) at both sides thereof along an extended line of a line between light emission positions of the first and second semiconductor lasers (11, 14). The diffracted light generated from the light beam of the first wavelength (10) by the hologram element (17) and the diffracted light generated from the light beam of the second wavelength (13) by the hologram element (17) are collected at substantially the same position at one side, and part (18, 19) of the plurality of photodetectors (18-23) are provided at the position. Signals obtained from the photodetectors (18-23) at the both sides are used to obtain a focus error signal and a tracking error signal.
摘要翻译：光拾取器包括：第一和第二半导体激光器（11,14）; 用于衍射由光学信息记录介质（9或12）反射的光的全息元件（17）; 和多个光电检测器（18-23）。全息元件（17）具有两个或更多个不同的衍射区域。沿着第一和第二半导体激光器（11,14）的发光位置之间的线的延伸线，在其两侧远离第一和第二半导体激光器（11,14）设置多个光电探测器（18-23））。由全息元件（17）从第一波长（10）的光束产生的衍射光和由全息元件（17）从第二波长（13）的光束产生的衍射光基本上被收集在在一个位置处设置相同的位置，并且在该位置处设置多个光电检测器（18-23）的部分（18,19）。使用从两侧的光电检测器（18-23）获得的信号来获得聚焦误差信号和跟踪误差信号。

10. 发明申请

US20060023608A1 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US20060023608A1
公开(公告)日：2006-02-02
申请号：US10527084
申请日：2003-09-08
申请人： Masahiko Nishimoto , Shinichi Hamaguchi , Tatsuya Nakamori , Yasuyuki Kochi
发明人： Masahiko Nishimoto , Shinichi Hamaguchi , Tatsuya Nakamori , Yasuyuki Kochi
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/123 , G11B7/131 , G11B7/133 , G11B7/1353
摘要： An optical pickup comprises: first and second semiconductor lasers (11, 14); a hologram element (17) for diffracting light reflected by an optical information recording medium (9 or 12); and a plurality of photodetectors (18-23). The hologram element (17) has two or more different diffraction regions. The plurality of photodetectors (18-23) are provided away from the first and second semiconductor lasers (11, 14) at both sides thereof along an extended line of a line between light emission positions of the first and second semiconductor lasers (11, 14). The diffracted light generated from the light beam of the first wavelength (10) by the hologram element (17) and the diffracted light generated from the light beam of the second wavelength (13) by the hologram element (17) are collected at substantially the same position at one side, and part (18, 19) of the plurality of photodetectors (18-23) are provided at the position. Signals obtained from the photodetectors (18-23) at the both sides are used to obtain a focus error signal and a tracking error signal.
摘要翻译：光拾取器包括：第一和第二半导体激光器（11,14）; 用于衍射由光学信息记录介质（9或12）反射的光的全息元件（17）; 和多个光电检测器（18-23）。全息元件（17）具有两个或更多个不同的衍射区域。沿着第一和第二半导体激光器（11,14）的发光位置之间的线的延伸线，在其两侧远离第一和第二半导体激光器（11,14）设置多个光电探测器（18-23））。由全息元件（17）从第一波长（10）的光束产生的衍射光和由全息元件（17）从第二波长（13）的光束产生的衍射光基本上被收集在在一个位置处设置相同的位置，并且在该位置处设置多个光电检测器（18-23）的部分（18,19）。使用从两侧的光电检测器（18-23）获得的信号来获得聚焦误差信号和跟踪误差信号。

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