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公开(公告)号：US20080074966A1
公开(公告)日：2008-03-27
申请号：US11660101
申请日：2005-09-21
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）。
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公开(公告)号：US07539117B2
公开(公告)日：2009-05-26
申请号：US11498989
申请日：2006-08-04
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。
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公开(公告)号：US20060215508A1
公开(公告)日：2006-09-28
申请号：US11352648
申请日：2006-02-13
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。
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公开(公告)号：US20070030788A1
公开(公告)日：2007-02-08
申请号：US11498989
申请日：2006-08-04
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。
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公开(公告)号：US20060007809A1
公开(公告)日：2006-01-12
申请号：US10526964
申请日：2003-09-08
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）。
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6.发明授权Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals 有权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
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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公开(公告)号：US20060023608A1
公开(公告)日：2006-02-02
申请号：US10527084
申请日：2003-09-08
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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8.发明授权公开(公告)号：US07969834B2
公开(公告)日：2011-06-28
申请号：US11763163
申请日：2007-06-14
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B2007/0006
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07247826B2
公开(公告)日：2007-07-24
申请号：US11384291
申请日：2006-03-21
CPC分类号： G02B5/32 , G02B7/04 , G02B27/1073 , G02B27/1093 , G02B27/40 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1356 , G11B2007/0006
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20060237624A1
公开(公告)日：2006-10-26
申请号：US11384291
申请日：2006-03-21
CPC分类号： G02B5/32 , G02B7/04 , G02B27/1073 , G02B27/1093 , G02B27/40 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1356 , G11B2007/0006
摘要： 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.
摘要翻译： 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。
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