利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.007 秒)

    Optical head
    1.
    发明公开
    Optical head 失效

    公开(公告)号：EP0147620A3

    公开(公告)日：1987-08-05

    申请号：EP84114044

    申请日：1984-11-20

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Ando, Hideo c/o Patent Division

    IPC分类号： G02B07/11 ,  G11B07/12 ,  G11B07/09 ,  G11B07/125 ,  G11B07/135 ,  G11B07/08

    CPC分类号： G11B33/10 ,  G11B7/0901 ,  G11B7/0916 ,  G11B7/12 ,  G11B7/1381

    摘要： In an optical head, recording, reproducing and guide laser beams are emitted from semiconductor lasers (11,16), and the laser beams are optically multiplexed by a multiplexer (36). The multiplexed laser beams are converged onto a tracking guide of a recording surface by an objective lens (20) and are reflected from the recording surface. The reflected laser beams are separated into the recording, reproducing and guide laser beams by the beam separator (38). The recording and guide laser beams are shielded in the beam separator (38), and only the reproducing laser beam is directed to photodetecting regions of information, tracking error and defocus detectors (28, 29, 30).

    Video recorder-playback machine
    2.
    发明公开
    Video recorder-playback machine 失效

    公开(公告)号：EP0181428A3

    公开(公告)日：1986-08-13

    申请号：EP85103324

    申请日：1981-10-20

    申请人： DISCOVISION ASSOCIATES

    发明人： Wilkinson, Richard L. ,  Vitale, George

    IPC分类号： G11B07/12 ,  G11B07/00 ,  G11B07/135

    CPC分类号： G11B7/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/08 ,  G11B27/36

    摘要： A video recorder-playback machine is provided for recording and/or playing back video information from an information disc. The machine includes a "write" laser and a "read" laser respectively for generating record and playback optical beams which are focused upon the disc by an optical record-playback head. An optics carriage movably positions the head with respect to the disc in moving optical alignment with the "write" laser and carries the "read" laser in fixed optical alignment with the head. The machine includes apparatus for monitoring the record optical beam during operation in a record mode, and for substantially simultaneous operation in a playback mode to monitor the playback optical beam during the recording process.

    Optical pickup
    3.
    发明公开
    Optical pickup 失效
    光学拾音器

    公开(公告)号：EP0195657A3

    公开(公告)日：1988-12-07

    申请号：EP86301994

    申请日：1986-03-19

    申请人： FUJITSU LIMITED

    发明人： Kato, Masayuki ,  Yamagishi, Fumio ,  Hasegawa, Shin-ya ,  Ikeda, Hiroyuki ,  Inagaki, Takefumi

    IPC分类号： G11B07/135

    CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B7/08547 ,  G11B7/1372

    摘要： An optical pickup for reading out information from an information recording medium, such as an optical diskette, comprises a light source (11) for irradiating a light beam (L,) onto an optical diskette (D), an optical sensor (15) for detecting a light beam (L 10 ) reflected from the optical diskette, and an optical system including a wave plate and two hologram lenses (12,13). The first hologram lens (13) diffracts the light beam (L 7 ) from the light source, and the second hologram lens (12) transmits the same light beam (L 7 ). On the other hand, the second hologram lens (12) diffracts the reflected light beam (L 10 ) from the optical diskette (D) towards the optical sensor (15), and the first hologram lens (13) transmits the same reflected light beam. (L 10 ). The light and compact- sized hologram lenses (12,13) enable a reduction in the access time to the optical diskette (D). A hologram lens assembly, suitable for use in an optical pickup, is also disclosed.

    摘要翻译： 用于从诸如光盘之类的信息记录介质读出信息的光学拾取器包括用于将光束（L）照射到光盘（D）上的光源（11），用于将光束 检测从光盘反射的光束（L10），以及包括波片和两个全息透镜（12,13）的光学系统。 第一全息透镜（13）衍射来自光源的光束（L7），并且第二全息透镜（12）透射相同的光束（L7）。 另一方面，第二全息透镜（12）将来自光盘（D）的反射光束（L10）衍射到光学传感器（15），并且第一全息透镜（13）透射相同的反射光束。 （L10）。 光和紧凑大小的全息图透镜（12,13）能够减少光盘（D）的存取时间。 还公开了适用于光学拾取器的全息图透镜组件。

    Astigmatism generator
    4.
    发明公开
    Astigmatism generator 失效
    ASTIGMATISM发电机组发电机

    公开(公告)号：EP0262668A3

    公开(公告)日：1988-07-20

    申请号：EP87114303

    申请日：1987-09-30

    申请人： PIONEER ELECTRONIC CORPORATION

    发明人： Maeda, Takanori Pioneer Electronic Corp.

    IPC分类号： G11B07/135 ,  G02B13/08 ,  G02B05/00

    CPC分类号： G11B7/1359 ,  G02B27/0025 ,  G11B7/0909 ,  G11B7/1362 ,  G11B7/1381 ,  G11B7/13922 ,  G11B7/1395

    摘要： An astigmatism generator such as may be used in the pickup of an optical disk player which produces substantially no other aberrations yet which can be manufactured at a low cost. The astigmatism generator is fabricated from a plate (21) having four plane surfaces, including a first surface (22) through which light is introduced,a second surface (23) parallel to the first surface and through which the light exits, and a third surface (24) by which light transmitted thorough the first surface is reflected toward the second surface. The third surface is arranged at an oblique angle (α) to the first and second surfaces and is selected such that almost all coma is eliminated from the light passing through the second surface.

    Optical system and components for optical disk reader
    5.
    发明公开
    Optical system and components for optical disk reader 失效
    光盘阅读器的光学系统和组件光学读取器的光学系统和组件

    公开(公告)号：EP0256685A3

    公开(公告)日：1988-11-30

    申请号：EP87306489

    申请日：1987-07-22

    申请人： OPTICAL COATING LABORATORY, INC.

    发明人： Anthon, Erik W.

    IPC分类号： G11B07/135 ,  G11B11/10 ,  G11B13/04

    CPC分类号： G11B7/1365

    摘要： The disclosure relates to an optical reader system (40), including a partially polarizing beam splitter (45) for directing a selected polarization component of a linearly polarized beam (42) to a target (12) such as a media disk, reflectively separating the resulting reflected beam from the beam directed to the target, and selectively enhancing the relative intensity of two orthogonal polarization components reflected from the target. A polarisation separater (55) separates the linearly polarised reflected beam into said selectively enhanced polarization components and a deflector assembly determines the relative intensities of said selectively enhanced potqrization components.

    Optical recording and reproducing device
    9.
    发明公开
    Optical recording and reproducing device 失效
    光学记录和再现设备

    公开(公告)号：EP0184750A3

    公开(公告)日：1988-07-13

    申请号：EP85115270

    申请日：1985-12-02

    申请人： HITACHI, LTD.

    发明人： Ito, Tetsuo ,  Sasaki, Hiroshi ,  Sato, Yoshio ,  Shimada, Satoshi ,  Miyamoto, Norifumi ,  Tsuboi, Nobuyoshi ,  Nihei, Hideki ,  Koyanagi, Hiroaki

    IPC分类号： G11B07/135 ,  G11B07/125 ,  G11B07/007

    CPC分类号： G11B7/1395

    摘要： A laser light flux is divided and synthesized so that its light intensity distribution is changed from a Gaussian distribution to a non-Gaussian distribution. When a laser light flux (L 0 ) having a Gaussian distribution is irradiated onto a dividing prism (1), it is divided into a left part (11) and a right part (1 2 ) which are refracted right and left invensely from each other. When the right and left parts (I 1 , 1 2 ) are incident on a synthesizing prism, they are refracted again and travel to be overlapped with each other on a recording medium. The light intensity distribution on a segment (dd') at the apex of the synthesizing prism is weaker at the central part and stronger at the peripheral part. This is because the light fluxes resulting from the division are inverted in their position so that the central part of the Gaussian distribution is separated left and right while the peripheral part with a weaker light intensity is centered.