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82 条记录 (耗时 0.033 秒)

    Optical pick-up device having an optical diffraction grating element
    72.
    发明授权
    Optical pick-up device having an optical diffraction grating element 失效
    具有光学衍射光栅元件的光学拾取装置

    公开(公告)号：US5440427A

    公开(公告)日：1995-08-08

    申请号：US113830

    申请日：1993-08-31

    申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

    发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

    IPC分类号： G02B5/18 ,  G11B7/135 ,  G02B27/44

    CPC分类号： G11B7/1353 ,  G02B5/1814 ,  G02B5/1857 ,  G02B5/1871

    摘要： An optical pick-up device comprising an optical system including a light source and an optical diffraction grating element and a light receiving element, wherein the optical diffraction grating element guides the 0th-order diffracted lights of a light beam emitted from the light source onto a recording medium and guides the first-order diffracted lights of a reflected light from the recording medium onto the light receiving element to produce a plurality of focused light spots having the same light amount, wherein the optical diffraction grating element includes diffraction gratings having a configuration in which grooves and flat lands each positioned between the adjacent grooves are successively alternately formed, wherein the diffraction gratings have the same groove depth, groove width and groove tilt angle in order to obtain a constant 0th-order diffraction efficiency and first-order diffraction efficiency in the optical diffraction grating element while the pitches of the diffraction gratings are made different by setting a different land width for each diffraction grating.

    摘要翻译： 一种包括光学系统和光学衍射光栅元件和光接收元件的光学系统的光学拾取装置，其中光学衍射光栅元件将从光源发射的光束的0级衍射光导向到 将来自记录介质的反射光的一级衍射光引导到光接收元件上，以产生具有相同光量的多个聚焦光点，其中光学衍射光栅元件包括衍射光栅，其衍射光栅具有 连续地交替地形成各自位于相邻槽之间的槽和平坦的焊盘，其中衍射光栅具有相同的槽深度，槽宽度和槽倾斜角，以便获得恒定的0级衍射效率和一级衍射效率 光学衍射光栅元件，而diffrac的间距 通过为每个衍射光栅设置不同的焊盘宽度，使光栅变得不同。

    Pickup device for a magneto-optical information recording system
    73.
    发明授权
    Pickup device for a magneto-optical information recording system 失效
    用于磁光信息记录系统的拾取装置

    公开(公告)号：US5428584A

    公开(公告)日：1995-06-27

    申请号：US97399

    申请日：1993-07-23

    申请人： Yoshio Yoshida ,  Hiroyuki Yamamoto ,  Renzaburou Miki ,  Kuniaki Okada ,  Yukio Kurata ,  Kouji Minami

    发明人： Yoshio Yoshida ,  Hiroyuki Yamamoto ,  Renzaburou Miki ,  Kuniaki Okada ,  Yukio Kurata ,  Kouji Minami

    IPC分类号： G11B7/135 ,  G11B7/12 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B11/00

    CPC分类号： G11B11/10543 ,  G11B7/124 ,  G11B7/13

    摘要： An optical information reproducing device includes a light source for generating a light beam, an optical system for converging the light beam generated by the light source on a magneto-optical recording medium on which recording information is recorded and for converging a return light beam reflected from the magneto-optical recording medium, beam splitting means for splitting the return light beam into split light beams, first detecting means for receiving one of the split light beams to detect the intensity of the one of the split light beams, servo signal generating means for generating a tracking error signal and a focusing error signal based on the output of the first detecting means, an optical waveguide disposed between the beam splitting means and the first detecting means, the optical waveguide crossing an optical axis of the one of the split light beams, an optical coupler disposed on the optical waveguide for separating part of the one of the split light beams from the one of the split beams to form a guided light beam which is guided in the optical waveguide, second detecting means for receiving the guided light beam from the optical waveguide to detect the intensity of at least one polarization component of the guided light beam, and information signal reproducing means for reproducing the recording information based on the output of the second detecting means.

    摘要翻译： 一种光学信息再现装置，包括用于产生光束的光源，用于将由光源产生的光束会聚在其上记录有记录信息的磁光记录介质上并用于会聚从 磁光记录介质，用于将返回光束分成分束光束的分束装置;第一检测装置，用于接收分束光束中的一个以检测一个分束光束的强度;伺服信号产生装置， 基于所述第一检测装置的输出产生跟踪误差信号和聚焦误差信号;布置在所述分束装置和所述第一检测装置之间的光波导，所述光波导与所述一个所述分束光束 设置在所述光波导上的光耦合器，用于将所述一个所述分束光束的一部分分离 以形成在光波导中被引导的引导光束;第二检测装置，用于接收来自光波导的引导光束，以检测被引导光束的至少一个偏振分量的强度;以及信息信号 再现装置，用于基于第二检测装置的输出再现记录信息。

    Optical head
    77.
    发明授权
    Optical head 失效
    光头

    公开(公告)号：US5283772A

    公开(公告)日：1994-02-01

    申请号：US65458

    申请日：1993-05-20

    申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata ,  Hideaki Sato

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

    IPC分类号： G11B7/13 ,  G11B7/135 ,  G11B7/09

    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，包括具有两个跟踪衍射区域的衍射元件，所述跟踪衍射区域被沿着与记录介质的轨道方向对应的方向延伸的分割线分隔开，并且一个聚焦衍射区域与跟踪衍射区域分开， 对应于记录介质的径向。 光头还包括具有两个跟踪光接收区域的光接收元件，用于接收在跟踪衍射区域中产生的衍射光，以及两个相邻的聚焦光接收区域，用于接收在聚焦衍射区域中产生的衍射光。 即使发生跟踪误差，在聚焦衍射区域中产生的衍射光总是具有基本恒定的光强度。 结果，可以通过精细调节衍射元件来防止在聚焦误差信号中发生偏移。

    Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves
    78.
    发明授权
    Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves 失效
    具有均匀蚀刻凹槽的锯齿形光栅的光学衍射光栅元件的制造方法

    公开(公告)号：US5279924A

    公开(公告)日：1994-01-18

    申请号：US908866

    申请日：1992-07-01

    申请人： Keiji Sakai ,  Katsuhiro Kubo ,  Yukio Kurata ,  Takahiro Miyake ,  Yoshio Yoshida

    发明人： Keiji Sakai ,  Katsuhiro Kubo ,  Yukio Kurata ,  Takahiro Miyake ,  Yoshio Yoshida

    IPC分类号： G02B5/18 ,  G11B7/135 ,  G03C5/00

    CPC分类号： G11B7/1353 ,  G02B5/1814 ,  G02B5/1857 ,  G02B5/1871

    摘要： The method of manufacturing an optical diffraction grating element of the present invention is characterized in adopting an ion beam made from a gas chemically reacting with a glass substrate when forming a diffraction grating having a serrated profile upon the glass substrate through an ion beam etching method. Also, when manufacturing an optical diffraction grating element that is divided into a plurality of regions whereon diffraction gratings having different diffraction angles with respect to an incident light are provided, the method of the present invention is characterized in forming slits into a resist film disposed upon a transparent substrate such as a glass substrate, in accordance with the patterns of the diffraction gratings, such that the width of the slits is constant irrespectively of the regions. Accordingly, the method of manufacturing an optical diffraction grating element of the present invention enables to improve the diffraction efficiency of the optical diffraction grating element, and to enhance the optical efficiency of an optical head device. The SN ratio of the output signals released by the optical head device may be thus improved and the servo error control executed accurately.

    摘要翻译： 本发明的光学衍射光栅元件的制造方法的特征在于，在通过离子束蚀刻法在玻璃基板上形成具有锯齿状的衍射光栅时，采用由与玻璃基板发生化学反应的气体制成的离子束。 此外，当制造被分成多个区域的光学衍射光栅元件，其中衍射光栅相对于入射光具有不同衍射角的衍射光栅时，本发明的方法的特征在于将狭缝形成为设置在 根据衍射光栅的图案，诸如玻璃基板的透明基板，使得狭缝的宽度与区域无关地是恒定的。 因此，本发明的光学衍射光栅元件的制造方法能够提高光学衍射光栅元件的衍射效率，提高光学头装置的光学效率。 可以提高由光头装置释放的输出信号的SN比，并且精确地执行伺服误差控制。