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    Optical element and optical head apparatus including the same
    2.
    发明授权
    Optical element and optical head apparatus including the same 有权
    包括其的光学元件和光学头装置

    公开(公告)号：US09001635B2

    公开(公告)日：2015-04-07

    申请号：US14306797

    申请日：2014-06-17

    申请人： Panasonic Corporation

    发明人： Kazuhiro Minami

    IPC分类号： G11B7/00 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1367

    CPC分类号： G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006

    摘要： An optical element having compatibility among two or more wavelengths and having an excellent converging performance for light with each wavelength, and an optical head apparatus using the optical element are provided. An optical element according to the present disclosure has a first region including an optical axis and a second region formed around the outer circumference of the first region. The first region and the second region respectively have a first diffraction structure and a second diffraction structure each cyclically formed on an aspheric surface and having a step-like cross section. In the first region, the number of steps included between top portions of the first diffraction structure is different from the number of steps included between the optical axis and a top portion that is closest to the optical axis in the first diffraction structure.

    摘要翻译： 具有两个或更多个波长之间具有兼容性并对每个波长的光具有优异的会聚性能的光学元件以及使用该光学元件的光学头装置。 根据本公开的光学元件具有包括光轴的第一区域和围绕第一区域的外圆周形成的第二区域。 第一区域和第二区域分别具有第一衍射结构和第二衍射结构，每个衍射结构和第二衍射结构循环地形成在非球面上并且具有阶梯状横截面。 在第一区域中，包括在第一衍射结构的顶部之间的台阶数与在第一衍射结构中最靠近光轴的光轴和顶部之间包括的台阶数不同。

    Optical memory playback apparatus
    3.
    发明授权
    Optical memory playback apparatus 失效
    光存储播放装置

    公开(公告)号：US4460977A

    公开(公告)日：1984-07-17

    申请号：US345391

    申请日：1982-02-03

    申请人： Junichi Shimada ,  Yoshinobu Mitsuhashi ,  Keisuke Kikuchi ,  Kenjiro Sakurai

    发明人： Junichi Shimada ,  Yoshinobu Mitsuhashi ,  Keisuke Kikuchi ,  Kenjiro Sakurai

    IPC分类号： G06K7/10 ,  G11B7/13 ,  G11B7/135 ,  G11B7/1367 ,  H01S5/00 ,  H01S5/042 ,  G11C13/00

    CPC分类号： G11B7/1367 ,  G11B7/13 ,  H01S5/0028 ,  H01S5/0656

    摘要： An optical memory playback apparatus is constructed so that a single longitudinal mode of laser beam emitted from a self-coupling semiconductor laser element is projected through an optical system onto an information recording medium and the laser beam reflected by the information recording medium is returned through the same optical system back to the semiconductor laser element. In addition, the apparatus interposes a spatially uneven phase plate in the optical system, whereby the longitudinal mode of emission of the semiconductor laser element is converted into a random multi-mode at all times and, consequently, the reproduction of information from the information recording medium is effected by detecting the variation in the intensity of output or terminal voltage of the semiconductor laser element which occurs in conformity with the variation in the intensity of the reflected laser beam.

    摘要翻译： 光学存储器重放装置被构造成使得从自耦合半导体激光元件发射的单个纵向模式的激光束通过光学系统投射到信息记录介质上，由信息记录介质反射的激光束通过 相同的光学系统返回到半导体激光元件。 此外，该装置将空间不平坦相位板插入光学系统中，由此半导体激光元件的纵向发射模式总是被转换成随机多模式，因此从信息记录中再现信息 介质通过检测与反射激光束的强度的变化相一致而发生的半导体激光元件的输出强度或端子电压的变化而实现。

    Objective lens and optical pickup apparatus
    4.
    发明申请
    Objective lens and optical pickup apparatus 审中-公开
    物镜和光学拾取装置

    公开(公告)号：US20050224693A1

    公开(公告)日：2005-10-13

    申请号：US11100387

    申请日：2005-04-07

    申请人： Kiyono Ikenaka ,  Tatsuji Kurogama ,  Mika Wachi

    发明人： Kiyono Ikenaka ,  Tatsuji Kurogama ,  Mika Wachi

    IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/1392 ,  G02B7/04 ,  G01V8/00

    CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B2007/0006

    摘要： An optical pickup apparatus includes: a first light source for emitting a first light flux with a wavelength λ1 for recording and/or reproducing information on a first optical disc having a protective substrate with a thickness t1; a third light source for emitting a third light flux with a wavelength λ3 for recording and/or reproducing information on a third optical disc having a protective substrate with a thickness t3; and an objective lens arranged in a common optical path of the first light flux and the third light flux when the optical pickup apparatus records and/or reproduces information on each of the first and third optical discs, wherein the first light flux enters into the objective lens as a converging light flux, and a magnification m3 of the objective lens for a third light flux satisfies − 1/10≦m3

    摘要翻译： 光拾取装置包括：第一光源，用于发射具有波长λ1的第一光通量，用于在具有厚度为t 1的保护基板的第一光盘上记录和/或再现信息; 第三光源，用于发射具有波长λ3的第三光通量，用于在具有厚度t 3的保护衬底的第三光盘上记录和/或再现信息; 以及当所述光学拾取装置在所述第一和第三光盘中的每一个上记录和/或再现信息时，布置在所述第一光束和所述第三光束的公共光路中的物镜，其中所述第一光通量进入所述目标 透镜作为会聚光束，并且用于第三光通量的物镜的倍率m 3满足-1 /10≤m3 <0。

    Objective lens element for optical disks and optical head device incorporating the same
    5.
    发明申请
    Objective lens element for optical disks and optical head device incorporating the same 审中-公开
    用于光盘的物镜元件和包含该物镜的光学头装置

    公开(公告)号：US20050111336A1

    公开(公告)日：2005-05-26

    申请号：US10985906

    申请日：2004-11-12

    申请人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Akifumi Hashimoto ,  Yuichi Takahashi ,  Yukihiro Chokyu ,  Kei Ikeda

    发明人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Akifumi Hashimoto ,  Yuichi Takahashi ,  Yukihiro Chokyu ,  Kei Ikeda

    IPC分类号： G02B13/00 ,  G02B5/18 ,  G02B13/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/1392

    CPC分类号： G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

    摘要： An objective lens records information on, or read information from, a first optical medium by utilizing a first light beam which convergences on the first optical medium at a first numerical aperture (hereinafter “NA1”). The objective lens records information on, or read information from, a second optical medium by utilizing a second light beam which convergences on the second optical medium at a second numerical aperture (hereinafter “NA2”). In the objective lens, NA1 is greater than NA2. The objective lens has an optical lens for receiving the first light beam and the second light beam. The optical lens has a peripheral diffraction structure disposed substantially outside an area of incidence of the second light beam for suppressing fluctuation in wavefront aberration of the first light beam, and a phase step structure disposed in a central region relative to the peripheral region for producing a phase difference in the second light beam.

    摘要翻译： 物镜通过利用以第一数值孔径收敛在第一光学介质上的第一光束（以下称为“NA1”）来记录关于第一光学介质的信息或从第一光学介质读取信息。 物镜通过利用以第二数值孔径（以下称为“NA2”）会聚在第二光学介质上的第二光束来记录关于第二光学介质的信息或从第二光学介质读取信息。 在物镜中，NA1大于NA2。 物镜具有用于接收第一光束和第二光束的光学透镜。 光学透镜具有基本上设置在第二光束的入射面的外侧的外围衍射结构，用于抑制第一光束的波面像差的波动，以及相位步长结构，其设置在相对于周边区域的中心区域中， 第二光束的相位差。

    Diffractive optical element and optical pickup apparatus
    6.
    发明申请
    Diffractive optical element and optical pickup apparatus 审中-公开
    衍射光学元件和光学拾取装置

    公开(公告)号：US20050063282A1

    公开(公告)日：2005-03-24

    申请号：US10942460

    申请日：2004-09-16

    申请人： Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

    发明人： Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

    IPC分类号： G02B5/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1392

    CPC分类号： G11B7/1353 ,  G02B3/08 ,  G02B13/003 ,  G02B13/0045 ,  G02B13/0055 ,  G02B13/0065 ,  G11B7/1367 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

    摘要： An optical pickup apparatus includes a diffractive optical element, and an objective lens that focuses a light beam of a first wavelength λ1, a light beam of a second wavelength λ2 and a light beam of a third wavelength λ3 on a first recording medium, a second recording medium, and a third recording medium, respectively, the wavelengths λ1, λ2, and λ3 being different from each other. The diffractive optical element includes a first diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the third wavelength λ3 but diffracts the light beam of the second wavelength λ2, and a second diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the second wavelength λ2 but diffracts the light beam of the third wavelength λ3, and each of the first and second diffractive surfaces satisfies the following condition inequality: Λ/λ≧8 wherein A represents the minimum pitch in the case that the width which generates a phase difference of one wavelength when the closest wavefronts resulting from adjacent steps in each of the diffractive surfaces are linked with each other is defined as one pitch, and λ represents the wavelength of the diffracted light.

    摘要翻译： 光拾取装置包括衍射光学元件和将第一波长λ1的光束，第二波长λ2的光束和第三波长λ3的光束的光束聚焦在第一记录介质上的物镜，第二 记录介质和第三记录介质，波长λ1，λ2和λ3彼此不同。 衍射光学元件包括：第一衍射面，其既不衍射第一波长λ1的光束也不衍射第三波长λ3的光束，但衍射第二波长λ2的光束;以及第二衍射面，其不衍射光 第一波长λ1的光束和第二波长λ2的光束，但衍射第三波长λ3的光束，并且第一和第二衍射面中的每一个满足以下条件不等式：λλ= 8其中A表示 当在每个衍射表面中由相邻步骤产生的最接近的波前相互连接时产生一个波长的相位差的宽度的情况下的最小间距被定义为一个间距，并且λ表示衍射的波长 光。

    Optical element and optical pickup device having the same
    10.
    发明申请
    Optical element and optical pickup device having the same 审中-公开
    具有该光学元件的光学元件和光学拾取装置

    公开(公告)号：US20050213472A1

    公开(公告)日：2005-09-29

    申请号：US11082550

    申请日：2005-03-17

    申请人： Kiyono Ikenaka ,  Junji Hashimura

    发明人： Kiyono Ikenaka ,  Junji Hashimura

    IPC分类号： G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/127 ,  G11B7/135 ,  G11B7/1367 ,  G11B7/1376 ,  G11B7/1392

    CPC分类号： G11B7/1367 ,  G11B7/127 ,  G11B7/1376 ,  G11B7/13922 ,  G11B2007/0006

    摘要： This invention provides an optical element which has an optical surface in which a first light beam having a wavelength λx and a second light beam having a wavelength λy, which are emitted from light sources, become incident, including a diffraction structure in which a plurality of zone portions are formed, the zone portions being arranged in a radial direction about an optical axis and forming one period by a plurality of zones formed into a staircase shape divided by steps in a section including the optical axis, wherein the plurality of zone portions of said diffraction structure include a first zone portion and a second zone portion whose numbers of zones in one period are different, and of the plurality of zones which form one period, the zones except the zone which gives a largest optical path length to the passing second light beam have at least two different widths in a direction perpendicular to the optical axis, and of the plurality of zones which form the zone portion, two zones which are adjacent to each other via a step are designed to give no actual phase difference to the first light beam to pass the first light beam and give a phase difference to the second light beam to generate a diffraction effect, and an optical pickup device having the optical element.

    摘要翻译： 本发明提供了一种光学元件，其具有光学表面，其中具有从光源发射的具有波长长度的第一光束和具有波长长度的第二光束入射，包括衍射结构，其中多个 形成区域部分，沿着光轴的径向布置，并且由形成为包括光轴的部分中的台阶形成为阶梯状的多个区域形成一个周期，其中，多个区域部分 所述衍射结构包括第一区域部分和一个周期中的区域数量不同的第二区域部分，以及形成一个周期的多个区域，除了向通过的第二个区域给出最大光程长度的区域之外的区域 光束在垂直于光轴的方向和形成区域por的多个区域中具有至少两个不同的宽度 通过台阶彼此相邻的两个区域被设计成不向第一光束提供实际的相位差以通过第一光束并且给予第二光束的相位差以产生衍射效应，并且 具有光学元件的光学拾取装置。