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    • 1. 发明申请
    • Optical pickup
    • 光学拾音
    • US20060007809A1
    • 2006-01-12
    • US10526964
    • 2003-09-08
    • Shinichi HamaguchiMasahiko NishimotoTatsuya NakamoriYasuyuki Kochi
    • Shinichi HamaguchiMasahiko NishimotoTatsuya NakamoriYasuyuki Kochi
    • G11B7/00
    • G11B7/131G11B7/0901G11B7/0903G11B7/123G11B7/1353G11B7/1381G11B2007/0006
    • 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.
    • 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)。
    • 2. 发明授权
    • Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals
    • 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
    • US07313061B2
    • 2007-12-25
    • US10527084
    • 2003-09-08
    • Masahiko NishimotoShinichi HamaguchiTatsuya NakamoriYasuyuki Kochi
    • Masahiko NishimotoShinichi HamaguchiTatsuya NakamoriYasuyuki Kochi
    • G11B7/00
    • G11B7/1381G11B7/123G11B7/131G11B7/133G11B7/1353
    • 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.
    • 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。
    • 3. 发明申请
    • Optical pickup device
    • 光学拾取装置
    • US20060023608A1
    • 2006-02-02
    • US10527084
    • 2003-09-08
    • Masahiko NishimotoShinichi HamaguchiTatsuya NakamoriYasuyuki Kochi
    • Masahiko NishimotoShinichi HamaguchiTatsuya NakamoriYasuyuki Kochi
    • G11B7/00
    • G11B7/1381G11B7/123G11B7/131G11B7/133G11B7/1353
    • 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.
    • 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。
    • 4. 发明授权
    • Optical pickup device having a structure providing efficient light usage
    • 具有提供高效光使用的结构的光拾取装置
    • US07969834B2
    • 2011-06-28
    • US11763163
    • 2007-06-14
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • G11B7/00
    • G11B7/1353G11B7/123G11B7/1275G11B7/131G11B2007/0006
    • The optical pickup device according to the present invention includes: a light source which emits light at first, second and third wavelengths; an optical path combining unit which combines vectors of the light at the first, second and third wavelengths which is emitted by the light source, and matches optical axes of the light at the first wavelength and the light at the third wavelength; a light condensing unit which condenses the light from the optical path combining unit onto the optical information storage medium; a diffraction element which diffracts light at the first, second and third wavelength which is reflected from the optical information storage medium, in a first direction and a second direction respectively; a first photo detector which receives light at the first, second and third wavelength that is diffracted in the first direction by the diffraction element; a second photo detector which receives light at the first and third wavelength that is diffracted in the second direction by the diffraction element; and a third photo detector which receives light at the second wavelength that is diffracted in the second direction by the diffraction element.
    • 根据本发明的光拾取装置包括:以第一,第二和第三波长发光的光源; 光路组合单元,其组合由所述光源发射的所述第一,第二和第三波长的光的矢量,并且匹配所述第一波长的光的光轴和所述第三波长的光; 聚光单元,其将来自光路组合单元的光聚合到光学信息存储介质上; 衍射元件,其在第一方向和第二方向上分别衍射从光信息存储介质反射的第一,第二和第三波长的光; 第一光电检测器,其接收由衍射元件沿第一方向衍射的第一,第二和第三波长的光; 第二光检测器,其通过衍射元件接收在第二方向衍射的第一和第三波长的光; 以及第三光电检测器,其接收由衍射元件沿第二方向衍射的第二波长的光。
    • 5. 发明授权
    • Optical pickup apparatus
    • 光拾取装置
    • US07247826B2
    • 2007-07-24
    • US11384291
    • 2006-03-21
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • G02B7/04G02B27/40G02B27/64
    • G02B5/32G02B7/04G02B27/1073G02B27/1093G02B27/40G11B7/123G11B7/1275G11B7/131G11B7/1353G11B7/1356G11B2007/0006
    • An optical path coupling member aligns an optical axis directed to a light condensing member of the first wavelength light having a shortest wavelength with that of the third wavelength light having a longest wavelength. A diffraction element condenses +2nd order diffracted light of the first wavelength light and +1st order diffracted light of the second wavelength light and third wavelength light into a first photodetector, the −2nd order diffracted light of the first wavelength light and −1st order diffracted light of the third wavelength light into a second photodetector, and −1st order diffracted light of the remaining second wavelength light into a photodetector, using ±2nd order diffracted light of the first wavelength light and ±1st order diffracted light of the second wavelength light and third wavelength light as signal light from an optical information recording medium. Consequently, the overall size of the optical pickup apparatus is reduced.
    • 光路耦合部件将具有最短波长的第一波长光的聚光部件的光轴与具有最长波长的第三波长光的光轴对准。 衍射元件将第一波长光的+ 2级衍射光和第二波长光和第三波长光的+ 1级衍射光聚合成第一光电检测器,第一波长光和-1级衍射的-2级衍射光 使用第二波长光的±2级衍射光和第二波长光的±1级衍射光,将第三波长的光照射到第二光电检测器中,并将剩余的第二波长的光的-1级衍射光转换成光电检测器,并且 第三波长光作为来自光学信息记录介质的信号光。 因此,光拾取装置的总体尺寸减小。
    • 6. 发明申请
    • Optical pickup apparatus
    • 光拾取装置
    • US20060237624A1
    • 2006-10-26
    • US11384291
    • 2006-03-21
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • Shinichi HamaguchiNaoki NakanishiTatsuya NakamoriNaoto Shimada
    • G02B7/04G02B27/40
    • G02B5/32G02B7/04G02B27/1073G02B27/1093G02B27/40G11B7/123G11B7/1275G11B7/131G11B7/1353G11B7/1356G11B2007/0006
    • An optical path coupling member aligns an optical axis directed to a light condensing member of the first wavelength light having a shortest wavelength with that of the third wavelength light having a longest wavelength. A diffraction element condenses +2nd order diffracted light of the first wavelength light and +1st order diffracted light of the second wavelength light and third wavelength light into a first photodetector, the −2nd order diffracted light of the first wavelength light and −1st order diffracted light of the third wavelength light into a second photodetector, and −1st order diffracted light of the remaining second wavelength light into a photodetector, using ±2nd order diffracted light of the first wavelength light and ±1st order diffracted light of the second wavelength light and third wavelength light as signal light from an optical information recording medium. Consequently, the overall size of the optical pickup apparatus is reduced.
    • 光路耦合部件将具有最短波长的第一波长光的聚光部件的光轴与具有最长波长的第三波长光的光轴对准。 衍射元件将第一波长光的+ 2级衍射光和第二波长光和第三波长光的+ 1级衍射光聚合成第一光电检测器,第一波长光和-1级衍射的-2级衍射光 使用第二波长光的±2级衍射光和第二波长光的±1级衍射光,将第三波长的光照射到第二光电检测器中,并将剩余的第二波长的光的-1级衍射光转换成光电检测器,并且 第三波长光作为来自光学信息记录介质的信号光。 因此,光拾取装置的总体尺寸减小。
    • 7. 发明授权
    • Optical pickup having a diffraction grating and a hologram element
    • 具有衍射光栅和全息元件的光学拾取器
    • US07057146B2
    • 2006-06-06
    • US10390011
    • 2003-03-18
    • Masahiko NishimotoShinichi Hamaguchi
    • Masahiko NishimotoShinichi Hamaguchi
    • G02B7/04
    • G11B7/131G11B7/0906G11B7/0912G11B7/123G11B7/1353
    • The optical pickup of this invention includes a diffraction grating for dividing a light beam emitted from a semiconductor laser into a main beam, a precedent sub beam and a subsequent sub beam; a hologram element for dividing reflected light beams of the main beam, the precedent sub beam and the subsequent sub beam from an optical recording medium respectively into first through eighth main beams, first through eighth precedent sub beams and first through eighth subsequent sub beams; a main beam detector for receiving the first through eighth main beams; a precedent sub beam detector for receiving the first through eighth precedent sub beams; and a subsequent sub beam detector for receiving the first through eighth subsequent sub beams.
    • 本发明的光拾取器包括用于将从半导体激光器发射的光束划分成主光束,先前子光束和后续子光束的衍射光栅; 用于将主光束,先前子光束和后续子光束的反射光束分别从第一至第八主光束,第一至第八先导子光束和第一至第八后续子光束分别的光学记录介质的全息元件分离; 用于接收第一至第八主光束的主光束检测器; 用于接收第一到第八先例子光束的先例子光束检测器; 以及用于接收第一至第八后续子光束的后续子光束检测器。
    • 10. 发明授权
    • Organic photoreceptor and image forming apparatus
    • 有机感光体和成像装置
    • US08158314B2
    • 2012-04-17
    • US12370920
    • 2009-02-13
    • Tomoko SakimuraToyoko ShibataShinichi Hamaguchi
    • Tomoko SakimuraToyoko ShibataShinichi Hamaguchi
    • G03G5/047
    • G03G15/751G03G5/0605G03G5/0609G03G5/0614
    • An object of the present invention is to form a high density electrostatic latent image on an organic photoreceptor via image exposure using a semiconductor laser or a light-emitting diode of an oscillation wavelength of 350-500 nm; and to provide an organic photoreceptor exhibiting improved sensitivity and repetition characteristics or improved dot reproducibility deterioration, and an image forming apparatus employing the organic photoreceptor. In an organic photoreceptor having a charge generating layer and a charge transporting layer on a conductive support, an organic photoreceptor wherein a charge generating layer incorporates a binder resin and a Br substituted pyranthrone-based compound and the spectral spectrum of the charge generating layer has maximum absorption values each in the region of 430-445 nm, 500-510 nm, and 530-545 nm.
    • 本发明的目的是通过使用半导体激光器或振荡波长为350-500nm的发光二极管通过图像曝光在有机感光体上形成高密度静电潜像; 并且提供具有改进的灵敏度和重复特性或改进的点再现性劣化的有机感光体,以及使用有机感光体的图像形成装置。 在导电性载体上具有电荷产生层和电荷传输层的有机感光体中,电荷产生层包含粘合剂树脂和Br取代的吡喃酮类化合物的有机感光体,电荷产生层的光谱具有最大值 在430-445nm,500-510nm和530-545nm的区域中各自的吸收值。