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38 条记录 (耗时 0.021 秒)

    Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
    2.
    发明授权
    Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
    光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息

    公开(公告)号：US6122242A

    公开(公告)日：2000-09-19

    申请号：US474907

    申请日：1999-12-29

    申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    IPC分类号： G11B7/00 ,  G11B7/013 ,  G11B7/135 ,  G11B19/12

    CPC分类号： G11B7/24085 ,  G11B19/12 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

    摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

    摘要翻译： 一种光盘再现装置，包括：半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜;偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

    Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
    3.
    发明授权
    Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
    光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息

    公开(公告)号：US6167019A

    公开(公告)日：2000-12-26

    申请号：US474554

    申请日：1999-12-29

    申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    IPC分类号： G11B7/00 ,  G11B7/013 ,  G11B7/135 ,  G11B19/12

    CPC分类号： G11B7/24085 ,  G11B7/1369 ,  G11B7/139 ,  G11B19/12 ,  G11B2007/0006

    摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

    摘要翻译： 一种光盘再现装置，包括半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜，偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

    Optical head for two different disk thicknesses with a light beam diameter control device
    5.
    发明授权
    Optical head for two different disk thicknesses with a light beam diameter control device 有权
    具有光束直径控制装置的两个不同光盘厚度的光头

    公开(公告)号：US06552990B1

    公开(公告)日：2003-04-22

    申请号：US09180301

    申请日：1998-11-05

    申请人： Seiji Kajiyama ,  Yoichi Tsuchiya ,  Masato Yamada ,  Yasuyuki Kanou ,  Shuichi Ichiura

    发明人： Seiji Kajiyama ,  Yoichi Tsuchiya ,  Masato Yamada ,  Yasuyuki Kanou ,  Shuichi Ichiura

    IPC分类号： G11B700

    CPC分类号： G11B7/1353 ,  G11B7/08582 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1362 ,  G11B7/1367 ,  G11B7/139 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical pickup device which includes a semiconductor laser selectively generating a laser beam with a wavelength of 635 nm, a laser beam with a wavelength of 780 nm, and an optical device having a central region in which a hologram is formed and a peripheral region in which a diffraction grating is formed. In particular, the optical device is arranged immediately below an objective lens, and the central region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction but increases the diameter of the teaser beam to the wavelength of 780 nm by diffraction. On the other hand, peripheral region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction, but substantially shields the laser beam with the wavelength of 780 nm by diffraction. Thus, each laser beam with the wavelength 635 nm is transmitted through objective lens and focused on a signal recording surface of a DVD. The periphery of the laser beam with the wavelength of 780 nm is significantly diffracted by peripheral region of optical device and only the central portion of the laser beam enters objective lens while increasing its diameter. Thus, the laser beam with the wavelength of 780 nm is focused on a signal recording surface of a CD-R or a CD-ROM. Therefore, the optical pickup device is capable of compatibly reproducing the DVD, CD-R and CD-ROM.

    摘要翻译： 一种光拾取装置，包括选择性地产生波长为635nm的激光束的半导体激光器，波长为780nm的激光束，以及具有形成全息图的中心区域的光学元件和周边区域 形成衍射光栅。 特别地，光学装置被布置在物镜的正下方，并且中心区域允许透射具有635nm波长的激光束而没有任何衍射，但是通过衍射将前导光束的直径增加到780nm的波长。 另一方面，外围区域允许透射波长为635nm的激光束而没有衍射，但是通过衍射基本上屏蔽了波长为780nm的激光束。 因此，波长为635nm的每个激光束通过物镜透射并聚焦在DVD的信号记录表面上。 波长为780nm的激光束的周围被光学器件的周边区域显着地衍射，并且只有激光束的中心部分在增加其直径的同时进入物镜。 因此，将波长为780nm的激光束聚焦在CD-R或CD-ROM的信号记录面上。 因此，光学拾取装置能够兼容地再现DVD，CD-R和CD-ROM。

    Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom
    7.
    发明授权
    Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom 有权
    用于鉴别彼此不同厚度的光学记录介质并再现信息的装置

    公开(公告)号：US06201777B1

    公开(公告)日：2001-03-13

    申请号：US09251448

    申请日：1999-02-17

    申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

    发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

    IPC分类号： G11B2010

    CPC分类号： G11B19/12 ,  G11B7/0945 ,  G11B7/12 ,  G11B2007/0006

    摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.

    摘要翻译： 用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。 当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘 从彼此。 因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。

    Optical pick-up device
    8.
    发明授权
    Optical pick-up device 失效
    光学拾取装置

    公开(公告)号：US6160783A

    公开(公告)日：2000-12-12

    申请号：US125788

    申请日：1998-08-27

    申请人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada

    发明人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada

    IPC分类号： G11B7/00 ,  G11B7/135

    CPC分类号： G11B7/139 ,  G11B7/1369 ,  G11B2007/0006

    摘要： An optical pick-up device includes an optical active element (11) which transmits an introduced laser beam (18) with its polarization direction (17) rotated by 90.degree. in playback of a DVD and also transmits an introduced laser beam (18) without rotating its polarization direction (17) in playback of a CD, and a polarizer (14) which transmits the entirety of a laser beam with its polarization direction rotated in playback of a DVD and also blocks the perimeter of a laser beam with its polarization direction not rotated in playback of a CD to reduce the effective numerical aperture of an objective lens (15). A rubbing direction (28) of an rubbing film (24) of the optical active element (11) that is positioned at the incident side of the laser beam, is adapted to be parallel to the polarization direction (17) of the introduced laser beam (18). Thus, the optical pick-up device can play back DVD as well as CD while reducing laser beam loss.

    摘要翻译： PCT No.PCT / JP98 / 00022 Sec。 371日期1998年8月27日第 102（e）1998年8月27日PCT PCT 1998年1月7日PCT公布。 出版物WO98 / 48416 PCT 日期：1998年10月29日光拾取装置包括光学有源元件（11），其在DVD的回放中使其引导的激光束（18）的偏振方向（17）旋转90°，并且还传输引入的激光 光束（18），而不在CD的回放中旋转其偏振方向（17）;以及偏振器（14），其透射其整个激光束的偏振方向在DVD的重放中旋转，并且还阻挡激光的周边 光束的偏振方向在CD的回放中不旋转以减小物镜（15）的有效数值孔径。 位于激光束入射侧的光学有源元件（11）的摩擦膜（24）的摩擦方向（28）适于与引入的激光束的偏振方向（17）平行 （18）。 因此，光学拾取装置可以在减少激光束损耗的同时再现DVD以及CD。