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51 条记录 (耗时 0.022 秒)

    Polarization detector
    1.
    发明授权
    Polarization detector 失效
    极化探测器

    公开(公告)号：US5473470A

    公开(公告)日：1995-12-05

    申请号：US093920

    申请日：1993-07-21

    申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    IPC分类号： G01J4/04 ,  G02B5/18 ,  G02B5/30 ,  G02B27/28 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G01J4/04 ,  G02B27/283 ,  G02B5/1809 ,  G02B5/1814

    摘要： A polarization detector includes a polarization diffraction element having a substrate with two facing surfaces which are placed in parallel with each other, a first diffraction grating formed on one surface of the substrate, and a second diffraction grating formed on the other surface of the substrate, with light being incident upon the first diffraction grating. Further, each grating pitch of the first diffraction grating and the second diffraction grating are nearly equal to a wavelength of the incident light. A limiting member is also included for limiting an incident region of the incident light with respect to the polarization diffraction element. The limiting member is formed on a light incident side of the first diffraction grating. Further, a converging lens is included for respectively converging light transmitted through the first diffraction grating and the second diffraction grating and light diffracted by the first diffraction grating and the second diffraction grating into different beam spots. Finally, a pair of photodetectors are included for detecting each optical intensity of the two beam spots converged by the converging lens.

    摘要翻译： 偏振检测器包括具有彼此平行放置的具有两个相对表面的基板的偏振衍射元件，形成在基板的一个表面上的第一衍射光栅和形成在基板的另一表面上的第二衍射光栅， 光入射到第一衍射光栅上。 此外，第一衍射光栅和第二衍射光栅的每个光栅间距几乎等于入射光的波长。 还包括限制入射光相对于偏振衍射元件的入射区域的限制构件。 限制部件形成在第一衍射光栅的光入射侧。 此外，包括会聚透镜，用于分别会聚透过第一衍射光栅和第二衍射光栅的光以及由第一衍射光栅和第二衍射光栅衍射的光成为不同的光束点。 最后，包括一对光检测器，用于检测由会聚透镜会聚的两束光束的每个光强度。

    Optical head device
    5.
    发明授权
    Optical head device 失效
    光头设备

    公开(公告)号：US5253237A

    公开(公告)日：1993-10-12

    申请号：US533401

    申请日：1990-06-05

    申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata ,  Yasuo Nakata ,  Katsuhiro Kubo

    发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata ,  Yasuo Nakata ,  Katsuhiro Kubo

    IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

    CPC分类号： G11B7/0916 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/13 ,  G11B7/1353

    摘要： The invention discloses an optical head device having a diffraction grating element divided into a plurality of diffraction gratings have a substantially equal diffraction angle, a substantially equal optical utilization efficiency, and different focal distances of first order diffracted lights, each of the first order diffracted lights being produced from a reflected light from the recording medium, at the respective diffraction gratings and a photodetector positioned at a mid-position between two focal points produced when there occurs no focusing error, the photo-detecting means having a plurality of photo-detecting parts juxtaposed in a direction substantially orthogonal to an average diffracting direction of the diffraction grating element. The above arrangement enables to produce a small size optical head device and improve the detecting of focusing errors and tracking errors.

    Display apparatus having a plurality of display devices
    6.
    发明授权
    Display apparatus having a plurality of display devices 失效
    具有多个显示装置的显示装置

    公开(公告)号：US5465315A

    公开(公告)日：1995-11-07

    申请号：US986052

    申请日：1992-12-02

    申请人： Keiji Sakai ,  Yoshio Yoshida ,  Hiroyuki Yamamoto ,  Yukio Kurata ,  Yasuo Nakata ,  Takahiro Miyake

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

    IPC分类号： G02B6/06 ,  G02F1/1333 ,  G09F9/305 ,  G02B6/08

    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 arranged in one direction, each of the plurality of display devices having a display area; and a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, the plurality of image transmission means being bent toward the one direction in which the display devices are arranged. Alternatively, a display apparatus of the invention includes: a plurality of display devices disposed in two directions, each of the plurality of display devices having a display area; a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, some of the plurality of image transmission means each having inward facing slopes and outward facing slopes on two pairs of opposing faces, the outward facing slopes of the image transmission means being directed to a direction in which the corresponding display device has no adjacent display devices.

    摘要翻译： 本发明的显示装置包括：沿一个方向布置的多个显示装置，所述多个显示装置中的每一个具有显示区域; 以及对应于各个显示装置的多个图像传输装置，每个图像传输装置的一个端面耦合到相应的一个显示装置的显示区域，对应于图像传输装置的另一个端面 相邻的显示装置彼此接触，所述多个图像传输装置朝向显示装置布置的一个方向弯曲。 或者，本发明的显示装置包括：多个显示装置，其设置在两个方向上，所述多个显示装置中的每一个具有显示区域; 与各个显示装置对应的多个图像传输装置，每个图像传输装置的一个端面耦合到对应的一个显示装置的显示区域，图像传输装置的与相邻的显示装置相对应的另一个端面 所述显示装置中的一个相互接触，所述多个图像传输装置中的一些图像传输装置中的每一个在两对相对的面上具有向内的斜面和向外的斜面，所述图像传输装置的向外的斜面被引导到 其中相应的显示装置没有相邻的显示装置。

    Optical pickup device with diffraction device
    8.
    再颁专利
    Optical pickup device with diffraction device 失效
    具有衍射装置的光学拾取装置

    公开(公告)号：USRE35332E

    公开(公告)日：1996-09-24

    申请号：US123459

    申请日：1993-09-17

    申请人： Toshiya Nagahama ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    发明人： Toshiya Nagahama ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    IPC分类号： G11B7/09 ,  G11B7/135 ,  G01J1/20 ,  G11B7/00

    CPC分类号： G11B7/1381 ,  G11B7/0916 ,  G11B7/1353

    摘要： An optical pickup device in which a main beam and a pair of sub-beams are used and a diffraction device is disposed between a recording medium and a light receiving device such as a photodetector is disclosed. The diffraction device comprises first to third diffraction regions. The second and third regions receive light beams from the recording medium which are substantially identical in amount to each other. The light receiving device comprises a first to a fourth light receiving regions. The first and second light receiving regions are juxtaposed, and separated by a line. The main beam which has been diffracted by the first diffraction region is focused onto said line. The main beam which has been diffracted by the second diffraction region is focused onto the first light receiving region. The main beam which has been diffracted by the third diffracting region is focused onto the second light receiving region. The sub-beams which have been diffracted by the diffraction device are focused onto the third and fourth light receiving regions, respectively. Alternatively, the diffraction device comprises an area where one or more diffraction regions are formed. The farthest point of the area at the side of the light receiving device is separated from the optical axis by a predetermined distance, to prevent the first order diffracted beam from entering the optical system disposed between the diffraction device and a recording medium.

    摘要翻译： 公开了一种其中使用主光束和一对子光束并且在记录介质和诸如光电检测器的光接收装置之间设置衍射装置的光学拾取装置。 衍射装置包括第一至第三衍射区域。 第二和第三区域接收来自记录介质的光束彼此基本相同。 光接收装置包括第一至第四光接收区域。 第一和第二光接收区域并列并且被一行分开。 已经被第一衍射区衍射的主光束被聚焦到所述线上。 已经被第二衍射区域衍射的主光束被聚焦到第一光接收区域上。 已经被第三衍射区域衍射的主光束被聚焦到第二光接收区域上。 已经被衍射装置衍射的子光束分别聚焦在第三和第四光接收区上。 或者，衍射装置包括形成一个或多个衍射区域的区域。 光接收装置一侧的区域的最远点与光轴分开预定距离，以防止一级衍射光束进入设置在衍射装置和记录介质之间的光学系统。

    Optical pickup device with diffraction device
    9.
    发明授权
    Optical pickup device with diffraction device 失效
    具有衍射装置的光学拾取装置

    公开(公告)号：US5049732A

    公开(公告)日：1991-09-17

    申请号：US424373

    申请日：1989-10-19

    申请人： Toshiya Nagahama ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    发明人： Toshiya Nagahama ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

    IPC分类号： G11B7/09 ,  G11B7/135

    CPC分类号： G11B7/1381 ,  G11B7/0916 ,  G11B7/1353

    摘要： An optical pickup device in which a main beam and a pair of sub-beams are used and a diffraction device is disposed between a recording medium and a light receiving device such as a photodetector is disclosed. The diffraction device comprises first to third diffraction regions. The second and third regions receive light beams from the recording medium which are substantially identical in amount to each other. The light receiving device comprises a first to a fourth light receiving regions. The first and second light receiving regions are juxtaposed, and separated by a line. The main beam which has been diffracted by the first diffraction region is focused onto said line. The main beam which has been diffracted by the second diffraction region is focused onto the first light receiving region. The main beam which has been diffracted by the third diffracting region is focused onto the second light receiving region. The sub-beams which have been diffracted by the diffraction device are focused onto the third and fourth light receiving regions, respectively. Alternatively, the diffraction device comprises an area where one or more diffraction regions are formed. The farthest point of the area at the side of the light receiving device is separated from the optical axis by a predetermined distance, to prevent the first order diffracted beam from entering the optical system disposed between the diffraction device and a recording medium.