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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. 发明授权

US07209427B2 Optical pickup with reduced size 有权
标题翻译：光学拾音器尺寸减小
公开(公告)号：US07209427B2
公开(公告)日：2007-04-24
申请号：US10870438
申请日：2004-06-18
申请人： Kazuhiko Yamanaka , Takuya Okuda , Shinichi Ijima , Tomoaki Tojo , Kazutoshi Onozawa , Junichi Kubo
发明人： Kazuhiko Yamanaka , Takuya Okuda , Shinichi Ijima , Tomoaki Tojo , Kazutoshi Onozawa , Junichi Kubo
IPC分类号： G11B7/00
CPC分类号： G11B7/1362 , G11B7/123 , G11B7/1353 , G11B7/1374 , G11B7/13922
摘要： An optical pickup having a light-emitting element, an objective lens unit, a reflecting mirror and a light-receiving element, emits a beam onto an optical recording medium and uses a reflected beam to read recorded information. In the objective lens unit, a central part of a surface, facing the light-emitting element, of an objective lens disposed so that an optical axis is substantially aligned with a chief ray of the beam emitted by the light-emitting element, is a transmissive diffraction grating, and a central part of a surface of the objective lens that will face the optical recording medium is a convex mirror which bulges toward the light-emitting element. The reflecting mirror, which is annular and encompasses the optical axis of the objective lens, reflects toward the objective lens the beam from the light-emitting element that has passed through the transmissive diffraction grating and been reflected by the convex mirror. The light-receiving element receives first-order diffracted light, of the reflected beam from the recording medium, diffracted by the transmissive diffraction grating.
摘要翻译：具有发光元件，物镜单元，反射镜和光接收元件的光学拾取器将光束发射到光学记录介质上并使用反射光束来读取记录的信息。在物镜单元中，面对发光元件的表面的中心部分设置为使得光轴基本上与由发光元件发射的光束的主光线对准，是物镜透镜式衍射光栅和面向光记录介质的物镜表面的中心部分是向发光元件凸出的凸面镜。环形并且包围物镜的光轴的反射镜朝向物镜反射来自已经通过透射衍射光栅的发光元件的光并被凸面镜反射。光接收元件接收来自记录介质的反射光束的一级衍射光，被透射衍射光栅衍射。

6. 发明申请

US20050047312A1 Optical pickup with reduced size 有权
标题翻译：光学拾音器尺寸减小
公开(公告)号：US20050047312A1
公开(公告)日：2005-03-03
申请号：US10870438
申请日：2004-06-18
申请人： Kazuhiko Yamanaka , Takuya Okuda , Shinichi Ijima , Tomoaki Tojo , Kazutoshi Onozawa , Junichi Kubo
发明人： Kazuhiko Yamanaka , Takuya Okuda , Shinichi Ijima , Tomoaki Tojo , Kazutoshi Onozawa , Junichi Kubo
IPC分类号： G11B7/00 , G11B7/12 , G11B7/135
CPC分类号： G11B7/1362 , G11B7/123 , G11B7/1353 , G11B7/1374 , G11B7/13922
摘要： An optical pickup having a light-emitting element, an objective lens unit, a reflecting mirror and a light-receiving element, emits a beam onto an optical recording medium and uses a reflected beam to read recorded information. In the objective lens unit, a central part of a surface, facing the light-emitting element, of an objective lens disposed so that an optical axis is substantially aligned with a chief ray of the beam emitted by the light-emitting element, is a transmissive diffraction grating, and a central part of a surface of the objective lens that will face the optical recording medium is a convex mirror which bulges toward the light-emitting element. The reflecting mirror, which is annular and encompasses the optical axis of the objective lens, reflects toward the objective lens the beam from the light-emitting element that has passed through the transmissive diffraction grating and been reflected by the convex mirror. The light-receiving element receives first-order diffracted light, of the reflected beam from the recording medium, diffracted by the transmissive diffraction grating.
摘要翻译：具有发光元件，物镜单元，反射镜和光接收元件的光学拾取器将光束发射到光学记录介质上并使用反射光束来读取记录的信息。在物镜单元中，面对发光元件的表面的中心部分设置为使得光轴基本上与由发光元件发射的光束的主光线对准，是物镜透镜式衍射光栅和面向光记录介质的物镜表面的中心部分是向发光元件凸出的凸面镜。环形并且包围物镜的光轴的反射镜朝向物镜反射来自已经通过透射衍射光栅的发光元件的光并被凸面镜反射。光接收元件接收来自记录介质的反射光束的一级衍射光，被透射衍射光栅衍射。

7. 发明申请

US20080304398A1 Optical Head That Improves Read Signal Characteristics 审中-公开
标题翻译：提高读信号特性的光头
公开(公告)号：US20080304398A1
公开(公告)日：2008-12-11
申请号：US11792142
申请日：2005-12-01
申请人： Kazutoshi Onozawa , Kazuhiko Yamanaka , Tomoaki Tojo , Takuya Okuda , Shinichi Ijima , Junichi Kubo
发明人： Kazutoshi Onozawa , Kazuhiko Yamanaka , Tomoaki Tojo , Takuya Okuda , Shinichi Ijima , Junichi Kubo
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/1362 , G11B7/1367 , G11B7/1381
摘要： In an optical head operable to record to and read from an optical recording medium, a beam emitted by a light-emitting element is reflected toward the light-emitting element by a first reflective mirror, and this reflected beam is reflected toward the optical recording medium by a second reflective mirror and focused on a recording surface of the optical recording medium. In this case, the first reflective mirror blocks a principal ray of the beam traveling toward the optical recording medium from the second reflective mirror, and the second reflective mirror consists of a plurality of concentric annular mirrors centered on the principal ray of the beam and separated from each other by a predetermined interval.
摘要翻译：在可操作以记录和读取光记录介质的光学头中，由发光元件发射的光束通过第一反射镜朝向发光元件反射，并且该反射光束被反射向光记录介质通过第二反射镜并聚焦在光学记录介质的记录表面上。在这种情况下，第一反射镜阻挡从第二反射镜朝向光学记录介质传播的光束的主光线，并且第二反射镜由以束的主光线为中心的多个同心环形反射镜组成，并分离彼此间隔预定间隔。

8. 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。

9. 发明申请

US20100177618A1 OPTICAL PICKUP DEVICE 有权
标题翻译：光学拾取器件
公开(公告)号：US20100177618A1
公开(公告)日：2010-07-15
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： G11B7/135
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。

10. 发明授权

US07751297B2 Optical pickup device 有权
标题翻译：光学拾取装置
公开(公告)号：US07751297B2
公开(公告)日：2010-07-06
申请号：US12303578
申请日：2007-09-06
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： G11B7/00
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。

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