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1. 发明申请

US20080159113A1 Optical Pickup Apparatus 审中-公开
标题翻译：光学拾取装置
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。

2. 发明授权

US07830773B2 Optical pickup for recording and reproducing information with a plurality of types of optical information recording mediums 失效
标题翻译：用于利用多种类型的光学信息记录介质记录和再现信息的光学拾取器
公开(公告)号：US07830773B2
公开(公告)日：2010-11-09
申请号：US11667844
申请日：2005-09-16
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： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup device in which a hologram element has a plurality of different diffraction directions. In the tracking standard state, the hologram element is divided into six areas by a straight line connecting two strength center points of two light beams, and by two straight lines that are perpendicular to the straight line. By adding the amount of light received by an area demarcated by two straight lines that pass the two strength center points, to the amount of light received by one of two outer areas sandwiching the area depending on the type of the light beam, it is possible to obtain a well-balanced tracking error signal for each of the two light beams.
摘要翻译：一种其中全息元件具有多个不同衍射方向的光学拾取装置。在跟踪标准状态下，通过连接两个光束的两个强度中心点的直线和与直线垂直的两条直线将全息元件分成六个区域。通过将通过两个强度中心点的两条直线划分的区域所接收的光量相对于根据光束类型夹住该区域的两个外部区域之一接收的光量，可以以获得两个光束中的每一个的均衡的跟踪误差信号。

3. 发明申请

US20090034394A1 Optical Pickup 失效
标题翻译：光学拾音
公开(公告)号：US20090034394A1
公开(公告)日：2009-02-05
申请号：US11667844
申请日：2005-09-16
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： G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup device in which a hologram element has a plurality of different diffraction directions. In the tracking standard state, the hologram element is divided into six areas by a straight line connecting two strength center points of two light beams, and by two straight lines that are perpendicular to the straight line. By adding the amount of light received by an area demarcated by two straight lines that pass the two strength center points, to the amount of light received by one of two outer areas sandwiching the area depending on the type of the light beam, it is possible to obtain a well-balanced tracking error signal for each of the two light beams.
摘要翻译：一种其中全息元件具有多个不同衍射方向的光学拾取装置。在跟踪标准状态下，通过连接两个光束的两个强度中心点的直线和与直线垂直的两条直线将全息元件分成六个区域。通过将通过两个强度中心点的两条直线划分的区域所接收的光量相对于根据光束类型夹住该区域的两个外部区域之一接收的光量，可以以获得两个光束中的每一个的均衡的跟踪误差信号。

4. 发明申请

US20060077859A1 Optical pickup 审中-公开
标题翻译：光学拾音
公开(公告)号：US20060077859A1
公开(公告)日：2006-04-13
申请号：US11238139
申请日：2005-09-29
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： G11B7/131 , G11B7/0903 , G11B7/123 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup includes: two laser diodes respectively operable to emit optical beams having different wave lengths; a diffraction grating operable to diffract each optical beam to a zero order diffracted beam and plus and minus first order diffracted beams; a holographic optical element operable to diffract the beams reflected from a recording medium; and photoelectric devices operable to receive the beams diffracted by the holographic optical element, wherein a photoelectric device for generating a tracking error signal and a photoelectric device for generating a focus error signal are disposed on opposite sides with respect to the laser diodes so as to face each other.
摘要翻译：光拾取器包括：两个激光二极管，分别可操作地发射具有不同波长的光束; 衍射光栅，其可操作以将每个光束衍射到零级衍射光束和正负衍射光束; 全息光学元件，其可操作地衍射从记录介质反射的光束; 以及可操作以接收由全息光学元件衍射的光束的光电装置，其中用于产生跟踪误差信号的光电装置和用于产生聚焦误差信号的光电装置设置在相对于激光二极管的相对侧上，以便面对彼此。

5. 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。

6. 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。

7. 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。

8. 发明申请

US20060007809A1 Optical pickup 审中-公开
标题翻译：光学拾音
公开(公告)号：US20060007809A1
公开(公告)日：2006-01-12
申请号：US10526964
申请日：2003-09-08
申请人： Shinichi Hamaguchi , Masahiko Nishimoto , Tatsuya Nakamori , Yasuyuki Kochi
发明人： Shinichi Hamaguchi , Masahiko Nishimoto , Tatsuya Nakamori , Yasuyuki Kochi
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/0903 , G11B7/123 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： There is provided an optical pickup compliant with a three-beam method, a phase difference method, a push-pull method and a three-beam push-pull method, comprising: an emission light source (105) for emitting two or more light components of different wavelengths; a diffraction element (107); a light collector (103); a hologram element (108); a plurality of photodetectors (206); and operation means for performing an operation on outputs of the plurality of photodetectors (206). The plurality of photodetectors (206) are at least eight photodetectors (P1 to P8) which are necessary for the execution of the three-beam method, the phase difference method, and the push-pull method. The operation means includes a switch (212) for switching between a terminal for obtaining a sub signal of the three-beam push-pull method and a terminal for obtaining a tracking signal of the three-beam method.
摘要翻译：提供一种符合三光束法，相位差法，推挽法和三光束推挽法的光学拾取器，包括：发射光源（105），用于发射两个或更多个光分量不同波长; 衍射元件（107）; 光收集器（103）; 全息元件（108）; 多个光电检测器（206）; 以及用于对所述多个光电检测器（206）的输出执行操作的操作装置。多个光电检测器（206）是执行三光束方法，相位差法和推挽方法所必需的至少八个光电检测器（P 1至P 8）。操作装置包括用于在用于获得三光束推挽方法的子信号的终端和用于获得三光束方法的跟踪信号的终端之间切换的开关（212）。

9. 发明申请

US20100238780A1 OPTICAL PICKUP DEVICE 有权
标题翻译：光学拾取器件
公开(公告)号：US20100238780A1
公开(公告)日：2010-09-23
申请号：US12791558
申请日：2010-06-01
申请人： Takuya OKUDA , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
发明人： Takuya OKUDA , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Naoto Shimada
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： A pickup device includes a diffraction grating 12 for separating a light beam emitted from the light source into at least three light beams. The diffraction grating 12 is divided into four regions by straight lines extending in a direction parallel to a tangential direction of tracks of an optical information recording medium. A periodic structure of a second region 12B has a phase difference of approximately 180 degrees from a periodic structure of a third region 12C, and a periodic structure of a first region 12A has a phase difference of approximately 180 degrees from a periodic structure of a fourth region 12D.
摘要翻译：拾取装置包括用于将从光源发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线方向平行的方向延伸的直线分成四个区域。第二区域12B的周期性结构具有与第三区域12C的周期性结构近似180度的相位差，并且第一区域12A的周期性结构与第四区域1212的周期性结构具有大约180度的相位差区域12D。

10. 发明授权

US07978586B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07978586B2
公开(公告)日：2011-07-12
申请号：US12090385
申请日：2007-07-18
申请人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
发明人： Naoto Shimada , Hiroaki Yamamoto , Naoki Nakanishi , Masahiko Nishimoto , Takuya Okuda
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/127 , G11B7/1353
摘要： An optical pickup device includes a diffraction grating 12 for separating a light beam emitted from a semiconductor laser element into at least three light beams. The diffraction grating 12 is divided into three regions by a straight line extending in a direction parallel to a tangent line of a track of an optical information recording medium. A second region 12B is divided into a first sub-block 13 and a second sub-block 14 by a straight line extending in a direction parallel to a radius direction of the optical information recording medium. The first sub-block 13 has a phase difference of approximately 180 degrees from the second sub-block 14. The first region 12A has a phase difference of approximately 90 degrees from the first sub-block 13 and has a phase difference of approximately 180 degrees from the third region 12C.
摘要翻译：光拾取装置包括用于将从半导体激光元件发射的光束分离成至少三个光束的衍射光栅12。衍射光栅12通过沿与光信息记录介质的光道的切线平行的方向延伸的直线分成三个区域。第二区域12B通过沿与光信息记录介质的半径方向平行的方向延伸的直线分成第一子块13和第二子块14。第一子块13具有与第二子块14大约180度的相位差。第一区12A具有与第一子块13大约90度的相位差，并且具有大约180度的相位差从第三区域12C。

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