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    Optical element and optical pickup device comprising the same
    1.
    发明授权
    Optical element and optical pickup device comprising the same 失效
    一种光学部件，从而提供了一种光学再现装置。

    公开(公告)号：EP0803868B1

    公开(公告)日：2002-06-12

    申请号：EP97111248.7

    申请日：1990-03-30

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Yoshida, Yoshio ,  Miyake, Takahiro ,  Nakata, Yasuo ,  Kurata, Yukio ,  Ogata, Nobuo ,  Ueyama, Tetsuo ,  Sato, Hideaki

    IPC分类号： G11B7/135 ,  G11B11/10 ,  G02B5/18

    CPC分类号： G11B7/1365 ,  G02B1/118 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1866 ,  G02B27/4261 ,  G02B27/4272 ,  G11B7/1353 ,  G11B11/10543

    摘要： An optical element comprises a polarization diffraction element (1) that is provided with diffraction gratings (3,4) that are respectively mounted on different faces of a transparent substrate (2) of a flat plate shape, which grating pitches are equal to each other and approximately equal to the wavelength of an incident light, and which grating lines are parallel; or comprises a phase shifting element or an antireflection element composed by a grating which grating pitch is approximately equal to the wavelength of an incident light (5), formed on a transparent base; or comprises a polarization diffraction element (1) that is provided with a substrate (2) made of a material having an optical anisotropy property, and a grating (3,4), and wherein the thickness of the substrate is set such that the difference that occurs between the phases of the P and S polarizations of a light due to the grating, and the difference that occurs between the phases of the two polarizations when the light propagates through the substrate, and cancel out; or comprises a polarization diffraction unit wherein a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a face of a transparent substrate, and a phase compensating grating which grating lines are substantially orthogonal to the grating lines of the diffraction grating, is formed on the other face of the substrate. An optical pickup device comprises an optical element wherein a grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a transparent base. An optical pickup device comprises a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, that is formed on a transparent substrate, and that splits the incident light into two polarized lights having mutually orthogonal polarizations; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zeroth-order diffracted light produced by the diffraction grating; and a second photodetector that is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate, and that receives a first-order diffracted light produced by the diffraction grating. As a result, a simple and inexpensive optical element may be fabricated, and a compact and light optical pickup device may be designed. Furthermore, the access to a magneto-optical recording medium may be performed accurately, and recording signals of high quality may be obtained.

    An optical information recording and reproducing device
    4.
    发明公开
    An optical information recording and reproducing device 失效
    Gerätzur Aufzeichnung und Wiedergabe von optischen Informationen。

    公开(公告)号：EP0554092A1

    公开(公告)日：1993-08-04

    申请号：EP93300638.9

    申请日：1993-01-28

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Nakata, Yasuo ,  Yoshida, Yoshio ,  Miyake, Takahiro ,  Sato, Hideaki ,  Kurata, Yukio ,  Yamamoto, Hiroyuki ,  Ogata, Nobuo ,  Kubo, Katsuhiro

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353

    摘要： An optical information recording and reproducing device is provided. The device includes a light source for emitting a light beam, a first diffraction element for splitting the light beam into at least three diffracted beams, an optical system guiding the diffracted beams to a recording medium, and a second diffraction element including at least one division line and a diffraction surface from which the diffracted beams are diffracted. The diffraction surface is divided into at least two regions by the division line or lines. One of the division lines is at a predetermined angle against the direction of a track on the recording medium, and the regions split each of the diffracted beams into at least two parts to diffract the parts in different directions. The device also includes an optical detecting element for detecting the light beams diffracted with the second diffraction element.

    摘要翻译： 提供了一种光信息记录和再现装置。 该装置包括用于发射光束的光源，用于将光束分成至少三个衍射光束的第一衍射元件，将衍射光束引导到记录介质的光学系统，以及包括至少一个分割部分的第二衍射元件 线衍射面和衍射光束衍射的衍射面。 通过分割线或线将衍射面分成至少两个区域。 分割线之一相对于记录介质上的轨道的方向成预定角度，并且区域将每个衍射光束分成至少两个部分，以在不同方向上衍射各部分。 该装置还包括用于检测与第二衍射元件衍射的光束的光学检测元件。

    A display apparatus
    5.
    发明公开
    A display apparatus 失效
    显示装置

    公开(公告)号：EP0550155A2

    公开(公告)日：1993-07-07

    申请号：EP92310999.5

    申请日：1992-12-02

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Sakai, Keiji ,  Yoshida, Yoshio ,  Yamamoto, Hiroyuki ,  Kurata, Yukio ,  Nakata, Yasuo ,  Miyake, Takahiro

    IPC分类号： G09F1/00 ,  G09F9/30 ,  G02B6/06 ,  C03B37/15 ,  C03B37/14 ,  G02B6/42

    CPC分类号： G02F1/13336 ,  G02B6/06 ,  G09F9/305 ,  Y10S385/901

    摘要： A display apparatus of the invention includes: a plurality of display devices (111, 112, 113) arranged in one direction (A), each of the plurality of display devices (111, 112, 113) having a display area (111a, 112a, 113a); and a plurality of image transmission means (131, 132, 133) corresponding to the respective display devices (111, 112, 113), one end face (D) of each of the image transmission means (131, 132, 133) being coupled to a display area (111a, 112a, 113a) of the corresponding one of the display devices (111, 112, 113), other end faces (C) of the image transmission means (131, 132, 133) corresponding to the adjacent ones of the display devices (111, 112, 113) being in contact with each other, the plurality of image transmission means (131, 132, 133) being bent toward the one direction in which the display devices (111, 112, 113) are arranged.

    摘要翻译： 本发明的显示装置包括：沿一个方向（A）布置的多个显示装置（111,112,113），多个显示装置（111,112,113）中的每一个具有显示区域（111a，112a） ，113a）; 和与各个显示装置（111,112,113）相对应的多个图像传输装置（131,132,133），每个图像传输装置（131,132,133）的一个端面（D）被耦合 到相应的一个显示装置（111,112,113）的显示区域（111a，112a，113a），图像传输装置（131,132,133）的与相邻显示装置相对应的另一端面（C） 在显示装置（111,112,113）彼此接触的状态下，多个图像发送装置（131,132,133）朝着显示装置（111,112,113）所在的一个方向弯曲 安排。

    Optical element and optical pickup device comprising it
    7.
    发明公开
    Optical element and optical pickup device comprising it 失效
    光学元件和包含它的光学拾取器件

    公开(公告)号：EP0390610A3

    公开(公告)日：1992-09-16

    申请号：EP90303482.5

    申请日：1990-03-30

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Yoshida, Yoshio ,  Miyake, Takahiro ,  Nakata, Yasuo ,  Kurata, Yukio ,  Ogata, Nobuo ,  Ueyama, Tetsuo ,  Sato, Hideaki

    IPC分类号： G02B5/18

    CPC分类号： G11B7/1365 ,  G02B1/118 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1866 ,  G02B27/4261 ,  G02B27/4272 ,  G11B7/1353 ,  G11B11/10543

    摘要： An optical element comprises a polarization diffraction element (1) that is provided with diffraction gratings (3,4) that are respectively mounted on different faces of a transparent substrate (2) of a flat plate shape, which grating pitches are equal to each other and approximately equal to the wavelength of an incident light, and which grating lines are parallel; or comprises a phase shifting element or an antireflection element composed by a grating which grating pitch is approximately equal to the wavelength of an incident light (5), formed on a transparent base; or comprises a polarization diffraction element (1) that is provided with a substrate (2) made of a material having an optical anisotropy property, and a grating (3,4), and wherein the thickness of the substrate is set such that the difference that occurs between the phases of the P and S polarizations of a light due to the grating, and the difference that occurs between the phases of the two polarizations when the light propagates through the substrate, and cancel out; or comprises a polarization diffraction unit wherein a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a face of a transparent substrate, and a phase compensating grating which grating lines are substantially orthogonal to the grating lines of the diffraction grating, is formed on the other face of the substrate. An optical pickup device comprises an optical element wherein a grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a transparent base. An optical pickup device comprises a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, that is formed on a transparent substrate, and that splits the incident light into two polarized lights having mutually orthogonal polarizations; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zeroth-order diffracted light produced by the diffraction grating; and a second photodetector that is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate, and that receives a first-order diffracted light produced by the diffraction grating. As a result, a simple and inexpensive optical element may be fabricated, and a compact and light optical pickup device may be designed. Furthermore, the access to a magneto-optical recording medium may be performed accurately, and recording signals of high quality may be obtained.

    摘要翻译： 光学元件包括偏振衍射元件（1），该偏振衍射元件（1）设置有分别安装在平板形状的透明基板（2）的不同表面上的衍射光栅（3,4），该光栅间距彼此相等 并且大致等于入射光的波长，哪些光栅线平行; 或包括形成在透明基底上的光栅间距近似等于入射光（5）的波长的由光栅构成的相移元件或抗反射元件; 或包括设置有由具有光学各向异性特性的材料制成的基板（2）的偏振衍射元件（1）和光栅（3,4），并且其中基板的厚度被设定为使得差异 发生在由于光栅引起的光的P和S偏振的相位之间，以及当光传播通过衬底时在两个偏振的相位之间发生的差异，并抵消; 或者包括偏振衍射单元，其中在透明基板的表面上形成光栅间距近似等于入射光的波长的衍射光栅，并且相位补偿光栅的光栅线基本上与 衍射光栅形成在基板的另一面上。 光学拾取装置包括光学元件，其中光栅间距近似等于入射光的波长的光栅形成在透明基底上。 一种光拾取装置，包括：具有衍射光栅的偏振光检测单元，栅格间距近似等于入射光的波长，形成在透明基板上，并将入射光分为两个相互正交的偏振光 极化; 第一光电检测器，其一体地安装并且基本上与基板平行，并且接收由衍射光栅产生的零级衍射光; 以及第二光电检测器，其位于与第一光电检测器相同的平面中并与第一光电检测器和基板一体地安装，并且接收由衍射光栅产生的一级衍射光。 结果，可以制造简单且廉价的光学元件，并且可以设计紧凑且轻便的光学拾取装置。 此外，可以精确地执行对磁光记录介质的访问，并且可以获得高质量的记录信号。

    Optical head
    8.
    发明公开
    Optical head 失效
    光学头

    公开(公告)号：EP0457573A1

    公开(公告)日：1991-11-21

    申请号：EP91304366.7

    申请日：1991-05-15

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Miyake, Takahiro ,  Yoshida, Yoshio ,  Kurata, Yukio ,  Sato, Hideaki

    IPC分类号： G11B7/13 ,  G11B7/135 ,  G11B7/125

    CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1398

    摘要： An optical head comprising a diffracting element having two tracking diffracting regions separated by a division line extending in a direction corresponding to a track direction of a recording medium, and one focusing diffracting region separated from the tracking diffracting regions by a division line extending in a direction corresponding to a radial direction of the recording medium. The optical head further comprises a light receiving element having two tracking light receiving regions for receiving diffracted lights produced in the tracking diffracting regions, and two adjoining focusing light receiving regions for receiving a diffracted light produced in the focusing diffracting region. The diffracted light produced in the focusing diffracting region always has a substantially constant light intensity, even when a tracking error occurs. As a result, an offset can be prevented from occurring in a focus error signal by finely adjusting the diffracting element.

    摘要翻译： 一种光学头，包括衍射元件，该衍射元件具有由在与记录介质的轨道方向对应的方向上延伸的分割线分开的两个跟踪衍射区域和通过沿着方向延伸的分割线与跟踪衍射区域分开的一个聚焦衍射区域， 对应于记录介质的径向。 该光学头还包括具有两个用于接收在跟踪衍射区域中产生的衍射光的跟踪光接收区域的光接收元件和两个用于接收在聚焦衍射区域中产生的衍射光的相邻聚焦光接收区域。 即使发生跟踪误差，在聚焦衍射区域中产生的衍射光也总是具有基本恒定的光强度。 结果，通过微调衍射元件可以防止在聚焦误差信号中发生偏移。