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1. 发明授权

US08451703B2 Optical pickup and optical information recording and reproducing apparatus 失效
标题翻译：光学拾取和光学信息记录和再现装置
公开(公告)号：US08451703B2
公开(公告)日：2013-05-28
申请号：US13227497
申请日：2011-09-08
申请人： Eriko Tatsu , Shigeharu Kimura , Tomoto Kawamura
发明人： Eriko Tatsu , Shigeharu Kimura , Tomoto Kawamura
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/131 , G11B2007/0013
摘要： An optical pickup includes a light source, an optical system for irradiating a recording medium including a plurality of recording layers with light from the light source, a diffraction optical element that divides light reflected from the recording medium into a plurality of optical fluxes and diffracts the fluxes, and an optical detector receiving the optical flux diffracted by the diffraction optical element. The optical detector includes a light receiving element detecting a focus error signal, wherein a longitudinal direction of the light receiving element is arranged to coincide with a circumferential direction of the recording medium, or arranged to be inclined to a circumferential or radial direction.
摘要翻译：一种光学拾取器，包括光源，用于利用来自光源的光照射包括多个记录层的记录介质的光学系统，将从记录介质反射的光分成多个光通量的衍射光学元件，并衍射出并且接收由衍射光学元件衍射的光束的光学检测器。光检测器包括检测聚焦误差信号的光接收元件，其中光接收元件的纵向方向被布置成与记录介质的圆周方向一致，或者被布置为沿圆周方向或径向方向倾斜。

2. 发明申请

US20120087220A1 OPTICAL PICKUP AND OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS 失效
标题翻译：光学拾取和光学信息记录和再现设备
公开(公告)号：US20120087220A1
公开(公告)日：2012-04-12
申请号：US13227497
申请日：2011-09-08
申请人： Eriko TATSU , Shigeharu Kimura , Tomoto Kawamura
发明人： Eriko TATSU , Shigeharu Kimura , Tomoto Kawamura
IPC分类号： G11B7/1353 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/131 , G11B2007/0013
摘要： An optical pickup includes a light source, an optical system for irradiating a recording medium including a plurality of recording layers with light from the light source, a diffraction optical element that divides light reflected from the recording medium into a plurality of optical fluxes and diffracts the fluxes, and an optical detector receiving the optical flux diffracted by the diffraction optical element. The optical detector includes a light receiving element detecting a focus error signal, wherein a longitudinal direction of the light receiving element is arranged to coincide with a circumferential direction of the recording medium, or arranged to be inclined to a circumferential or radial direction.
摘要翻译：一种光学拾取器，包括光源，用于利用来自光源的光照射包括多个记录层的记录介质的光学系统，将从记录介质反射的光分成多个光通量的衍射光学元件，并衍射出并且接收由衍射光学元件衍射的光束的光学检测器。光检测器包括检测聚焦误差信号的光接收元件，其中光接收元件的纵向方向被布置成与记录介质的圆周方向一致，或者被布置为沿圆周方向或径向方向倾斜。

3. 发明授权

US08243575B2 Optical head 有权
标题翻译：光头
公开(公告)号：US08243575B2
公开(公告)日：2012-08-14
申请号：US12955119
申请日：2010-11-29
申请人： Tomoto Kawamura , Hiromi Kita , Hiroshi Ogasawara , Michio Hatagi
发明人： Tomoto Kawamura , Hiromi Kita , Hiroshi Ogasawara , Michio Hatagi
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/08582 , G11B7/1359 , G11B2007/0006
摘要： A thin-type optical head, smaller in optic mounting spaces comprising to the conventional one, in an optic system enabling with BD including a 2-layers BD, DVD an CD, comprises a light source, for emit a light beam therefrom; an optical branch element for penetrating a predetermined amount of lights, therethrough, of an incident light beam thereon, and to reflecting remaining amount of lights thereupon; a light focusing element for focusing the light beam upon an optical information recording medium; a photo detector for receiving the light beam reflecting upon the optical information recording medium; and an optical path converter element for converting an angle of an optical path, on which the light beam propagates, wherein the optical path converter element is disposed on an optical path of the light beam between the optical branch element and the photo detector, or between the optical branch element and the light source, and has an incident surface, upon which the light beam enters, and an emission surface, from which the light beams emits, so that the light beam reflects at least two (2) times within the optical path converter element, during time when passing through between the incident surface and the emission surface.
摘要翻译：一种薄型光学头，在包括常规光学系统的光学安装空间中较小，在具有包括2层BD，DVD和CD的BD的光学系统中，包括用于从其发射光束的光源; 用于穿过其中的入射光束穿过其中的预定量的光并且反射剩余的光量的光学分支元件; 用于将光束聚焦在光学信息记录介质上的光聚焦元件; 光检测器，用于接收在光信息记录介质上反射的光束; 以及用于转换光束传播的光路的角度的光路转换器元件，其中光路转换器元件设置在光分支元件和光检测器之间的光束的光路上，或者在光分支元件和光源，并且具有光束入射的入射表面和光束从其发射的发射表面，使得光束在光学器件内反射至少两（2）次路径转换器元件，在通过入射表面和发射表面之间的时间期间。

4. 发明申请

US20110211437A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS 失效
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20110211437A1
公开(公告)日：2011-09-01
申请号：US12955269
申请日：2010-11-29
申请人： Kazuyoshi YAMAZAKI , Tomoto Kawamura
发明人： Kazuyoshi YAMAZAKI , Tomoto Kawamura
IPC分类号： G11B7/135
CPC分类号： G11B7/1381 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup device including: a laser diode for emitting laser light; an objective lens which irradiates an optical beam emitted from the laser diode; an actuator which displaces the objective lens in a radius direction of the optical disc; a grating for branches an optical beam reflected by an information recording layer into plural regions; and one photodetector having plural light receiving parts for receiving the branched optical beams, wherein the photodetector has a first light receiving part which detects zero-th order grating diffracted light and plural second light receiving parts which detecting grating diffracted light having an order not less than that of ±first order grating diffracted light; a detected signal of the zero-th order grating diffracted light is defined as a reproduction signal; and a detected signal of the grating diffracted light is defined as a signal for servo controlling.
摘要翻译：一种光学拾取装置，包括：用于发射激光的激光二极管; 用于照射从激光二极管发射的光束的物镜; 致动器，其在所述光盘的半径方向上移动所述物镜; 光栅，用于将由信息记录层反射的光束分支成多个区域; 以及一个光电检测器，具有用于接收分支光束的多个光接收部分，其中光电检测器具有检测零级光栅衍射光的第一光接收部分和多个第二受光部分，其检测具有不小于 ±一阶光栅衍射光; 将零级光栅衍射光的检测信号定义为再现信号; 光栅衍射光的检测信号被定义为用于伺服控制的信号。

5. 发明授权

US07733760B2 Optical pickup having radially arranged lenses in a low profile construction 有权
标题翻译：光拾取器具有处于低轮廓结构的径向布置的透镜
公开(公告)号：US07733760B2
公开(公告)日：2010-06-08
申请号：US11712184
申请日：2007-02-27
申请人： Tomoto Kawamura , Yoshiro Konishi , Toshimasa Kamisada , Yasuo Kitada
发明人： Tomoto Kawamura , Yoshiro Konishi , Toshimasa Kamisada , Yasuo Kitada
IPC分类号： G11B7/00
CPC分类号： G11B7/1376 , G11B2007/0006
摘要： An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimates lens which collimates the first beam; a second collimate lens which collimates the second beam; a first objective lens which converges the first collimated beam onto an optical disc; and a second objective lens which converges the second collimated beam onto the disc. The first and second objective lenses are arranged in the disc radial direction. The second objective lens is arranged closer to the side of the disc outer circumference than the first objective lens. The first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens. The second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens. The gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens.
摘要翻译：光拾取器包括：发射具有第一波长的第一光束的第一光源; 发射波长短于第一波长的第二光束的第二光源; 准直第一光束的第一准直透镜; 准直第二光束的第二准直透镜; 将第一准直光束会聚到光盘上的第一物镜; 以及将第二准直光束会聚到盘上的第二物镜。第一和第二物镜被配置在盘径向。第二物镜比第一物镜更靠近盘外周侧。当从第一物镜观察第二物镜时，第一准直透镜布置在右手侧。当从第二物镜观察第一物镜时，第二准直透镜布置在左手侧。第一准直透镜和第一物镜之间的间隙大于第二准直透镜和第二物镜之间的间隙。

6. 发明授权

US07697394B2 Optical pickup and optical information recording apparatus using the same 有权
标题翻译：光拾取器及使用其的光信息记录装置
公开(公告)号：US07697394B2
公开(公告)日：2010-04-13
申请号：US11905527
申请日：2007-10-02
申请人： Kunikazu Ohnishi , Tomoto Kawamura , Masayuki Inoue
发明人： Kunikazu Ohnishi , Tomoto Kawamura , Masayuki Inoue
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0945 , G11B2007/0006
摘要： An optical pickup includes a diffraction grating partitioned into three areas, in which the phase of periodic grating groove structure in an area is successively shifted from that in the adjacent area by 90°. In the generation of a differential push-pull signal, an amplification factor K for sub push-pull signals is varied depending on the type of the optical disk. By such composition of the optical pickup, amplitude deterioration of the tracking error signal accompanying displacement of the object lens is reduced.
摘要翻译：光学拾取器包括分为三个区域的衍射光栅，其中区域中的周期性光栅槽结构的相位相继地从相邻区域中的相位移动90°。在产生差分推挽信号时，副推挽信号的放大系数K根据光盘的类型而变化。通过光学拾取器的这种组合，伴随物镜位移的跟踪误差信号的振幅恶化减小。

7. 发明申请

US20090268584A1 Optical Pickup Apparatus And Optical Disc Apparatus Using Same 有权
标题翻译：光拾取装置和使用其的光盘装置
公开(公告)号：US20090268584A1
公开(公告)日：2009-10-29
申请号：US12497966
申请日：2009-07-06
申请人： Toshimasa Kamisada , Yasuo Kitada , Kazuyoshi Yamazaki , Tomoto Kawamura , Yoshiro Konishi
发明人： Toshimasa Kamisada , Yasuo Kitada , Kazuyoshi Yamazaki , Tomoto Kawamura , Yoshiro Konishi
IPC分类号： G11B7/135
CPC分类号： G11B7/133 , G11B7/0901 , G11B7/0906 , G11B7/094 , G11B7/0943 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0013
摘要： An optical pickup apparatus is provided with a dividing element having a plurality of regions. The dividing element is capable of dividing a light flux reflected by the optical disc into a plurality of light fluxes having different outgoing directions. Each region of the dividing element and light receiving parts of a light detector are structured such that when a target information recording layer of the optical disc is brought into focus, a light flux reflected from the target information recording layer is focused on the light receiving parts of the light detector, and a light flux reflected from other information recording layer than the target information recording layer is not irradiated onto the light receiving parts of the light detector.
摘要翻译：光拾取装置具有多个区域的分割元件。分割元件能够将由光盘反射的光束分成具有不同输出方向的多个光束。分光元件的各个区域和光检测器的受光部分被构造为使得当光盘的目标信息记录层被聚焦时，从目标信息记录层反射的光束聚焦在光接收部分并且从目标信息记录层的其它信息记录层反射的光束不被照射到光检测器的光接收部分上。

8. 发明申请

US20090190460A1 OPTICAL HEAD AND APPARATUS USING THE SAME 失效
标题翻译：光头和使用它的装置
公开(公告)号：US20090190460A1
公开(公告)日：2009-07-30
申请号：US12359440
申请日：2009-01-26
申请人： Tomoto Kawamura , Hiroshi Ogasawara
发明人： Tomoto Kawamura , Hiroshi Ogasawara
IPC分类号： G11B7/135
CPC分类号： G11B7/131 , G11B7/1353 , G11B7/1356
摘要： An optical head and an apparatus using the optical head are shown. The optical head includes a light-emitting element, a first polarized light diverging element for transmitting the light beam of a first polarization direction and reflecting the light beam of a second polarization direction orthogonal to the first polarization direction, a second polarized light diverging element for transmitting or reflecting the light beam of the first polarization direction, a converging element for converging the light beam on an information recording medium, a reflection element for reflecting a first reflected light beam reflected on the information recording medium and reflected on or transmitted through the second polarized light diverging element, and a detection element for detecting a second reflected light beam reflected on the reflection element and transmitted through or reflected on the second polarized light diverging element.
摘要翻译：示出了使用光学头的光学头和装置。光头包括发光元件，用于透射第一偏振方向的光束并反射与第一偏振方向正交的第二偏振方向的光束的第一偏振光发散元件，用于发射或反射第一偏振方向的光束，用于将光束会聚在信息记录介质上的会聚元件，用于反射在信息记录介质上反射并在其上反射或透过第二偏振方向的第一反射光的反射元件偏振光发散元件和用于检测在反射元件上反射并透射或反射在第二偏振光发散元件上的第二反射光束的检测元件。

9. 发明申请

US20080094949A1 Optical pickup apparatus and optical disc apparatus using same 有权
标题翻译：光拾取装置和使用其的光盘装置
公开(公告)号：US20080094949A1
公开(公告)日：2008-04-24
申请号：US11979129
申请日：2007-10-31
申请人： Toshimasa Kamisada , Yasuo Kitada , Kazuyoshi Yamazaki , Tomoto Kawamura , Yoshiro Konishi
发明人： Toshimasa Kamisada , Yasuo Kitada , Kazuyoshi Yamazaki , Tomoto Kawamura , Yoshiro Konishi
IPC分类号： G11B7/00
CPC分类号： G11B7/133 , G11B7/0901 , G11B7/0906 , G11B7/094 , G11B7/0943 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0013
摘要： An optical pickup apparatus includes a semiconductor laser for emitting a laser light, an objective lens for irradiating the light flux emitted from the semiconductor laser onto an optical disc, and a light detector for receiving the light flux reflected from the optical disc. The light detector has a light receiving part that comprises a region 1, a region 2, a region 3, a region 4, a region 5, a region 6 and a region 7.
摘要翻译：光拾取装置包括用于发射激光的半导体激光器，用于将从半导体激光器发射的光束照射到光盘上的物镜，以及用于接收从光盘反射的光束的光检测器。光检测器具有包括区域1，区域2，区域3，区域4，区域5，区域6和区域7的光接收部分。

10. 发明申请

US20080031100A1 Optical pickup and optical information recording apparatus using the same 有权
公开(公告)号：US20080031100A1
公开(公告)日：2008-02-07
申请号：US11905527
申请日：2007-10-02
申请人： Kunikazu Ohnishi , Tomoto Kawamura , Masayuki Inoue
发明人： Kunikazu Ohnishi , Tomoto Kawamura , Masayuki Inoue
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0945 , G11B2007/0006
摘要： An optical pickup includes a diffraction grating partitioned into three areas, in which the phase of periodic grating groove structure in an area is successively shifted from that in the adjacent area by 90°. In the generation of a differential push-pull signal, an amplification factor K for sub push-pull signals is varied depending on the type of the optical disk. By such composition of the optical pickup, amplitude deterioration of the tracking error signal accompanying displacement of the object lens is reduced.

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