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8 records (took 0.021 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE69114980D1

    公开(公告)日：1996-01-11

    申请号：DE69114980

    申请日：1991-09-23

    Applicant: SONY CORP

    Inventor： FUJITA GORO ,  TOYOTA KIYOSHI ,  IWAASA SHOJI ,  KASHIWAGI HIROSHI

    IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B7/09

    Abstract: A head position controlling device in which the head position may be controlled accurately even with a magneto-optical disc (3) having regions with different reflectance values. A gap sensor consisting of a light emitting element (5) and light receiving elements (6) and (7) are arrayed along the track direction of a magneto-optical disc (3) to prevent unequilibrium in the volume of received light at the light receiving elements (6) und (7).

    2.
    发明专利
    未知

    公开(公告)号：DE3587121D1

    公开(公告)日：1993-04-01

    申请号：DE3587121

    申请日：1985-12-05

    Applicant: SONY CORP

    Inventor： TOYOTA KIYOSHI ,  ISHIDA MINORU

    IPC: G06K7/015 ,  G06K7/10 ,  G11B7/00 ,  G11B7/0033

    Abstract: PCT No. PCT/JP85/00669 Sec. 371 Date Aug. 4, 1986 Sec. 102(e) Date Aug. 4, 1986 PCT Filed Dec. 5, 1985 PCT Pub. No. WO86/03611 PCT Pub. Date Jun. 19, 1986.An optical type record card reader according to the present invention is provided with a line sensor (10) for reading an information by a reflected light from a track of an optical type record card (1) irradiated by a light source (4) and in which optical type record card an information is recorded on a record medium (1A) as a plurality of parallel tracks which can be read out optically, a cylindrical lens (11) located rotatably between the optical type record card (1) and the line sensor (10) and an azimuth error detecting circuit for detecting an azimuth error generated between the track and the line sensor (10), wherein the cylindrical lens (11) is rotated by the detected output of the azimuth error detecting circuit to thereby correct the azimuth error. Thus, it becomes possible to correct the azimuth error of the projected image a sub-track of the optical type record card onto the line sensor smoothly, highly precisely and rapidly by the rotation of the cylindrical lens.

    5.
    发明专利
    未知

    公开(公告)号：DE69114980T2

    公开(公告)日：1996-04-25

    申请号：DE69114980

    申请日：1991-09-23

    Applicant: SONY CORP

    Inventor： FUJITA GORO ,  TOYOTA KIYOSHI ,  IWAASA SHOJI ,  KASHIWAGI HIROSHI

    IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B7/09

    Abstract: A head position controlling device in which the head position may be controlled accurately even with a magneto-optical disc (3) having regions with different reflectance values. A gap sensor consisting of a light emitting element (5) and light receiving elements (6) and (7) are arrayed along the track direction of a magneto-optical disc (3) to prevent unequilibrium in the volume of received light at the light receiving elements (6) und (7).

    6.
    发明专利
    未知

    公开(公告)号：DE3587121T2

    公开(公告)日：1993-07-01

    申请号：DE3587121

    申请日：1985-12-05

    Applicant: SONY CORP

    Inventor： TOYOTA KIYOSHI ,  ISHIDA MINORU

    IPC: G06K7/015 ,  G06K7/10 ,  G11B7/00 ,  G11B7/0033

    Abstract: PCT No. PCT/JP85/00669 Sec. 371 Date Aug. 4, 1986 Sec. 102(e) Date Aug. 4, 1986 PCT Filed Dec. 5, 1985 PCT Pub. No. WO86/03611 PCT Pub. Date Jun. 19, 1986.An optical type record card reader according to the present invention is provided with a line sensor (10) for reading an information by a reflected light from a track of an optical type record card (1) irradiated by a light source (4) and in which optical type record card an information is recorded on a record medium (1A) as a plurality of parallel tracks which can be read out optically, a cylindrical lens (11) located rotatably between the optical type record card (1) and the line sensor (10) and an azimuth error detecting circuit for detecting an azimuth error generated between the track and the line sensor (10), wherein the cylindrical lens (11) is rotated by the detected output of the azimuth error detecting circuit to thereby correct the azimuth error. Thus, it becomes possible to correct the azimuth error of the projected image a sub-track of the optical type record card onto the line sensor smoothly, highly precisely and rapidly by the rotation of the cylindrical lens.

    PHASE VARYING DEVICE, AND OPTICAL PICKUP APPARATUS USING THE SAME FOR MAGNETO-OPTICAL STORAGE
    7.
    发明公开
    PHASE VARYING DEVICE, AND OPTICAL PICKUP APPARATUS USING THE SAME FOR MAGNETO-OPTICAL STORAGE 失效
    相变装置，以及使用磁光储存的光学拾取装置

    公开(公告)号：EP0579843A4

    公开(公告)日：1996-05-08

    申请号：EP93903326

    申请日：1993-02-08

    Applicant: SONY CORP

    Inventor： HORIMAI HIDEYOSHI ,  SEO KATSUHIRO ,  SAITO KIMIHIRO ,  TOYOTA KIYOSHI

    IPC: G02B5/04 ,  G02B5/30 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B11/105 ,  G11B11/10

    CPC classification number: G11B7/131 ,  G02B5/04 ,  G02B5/3083 ,  G11B7/123 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1367 ,  G11B11/10543

    Abstract: An optical pickup apparatus has a laser beam source (11), a polarized beam splitter (14) and an objective lens (13), all being aligned with an optical axis (0-0'). The beam emitted from the laser beam source (11) is projected onto a recording surface (1a) of a magneto-optical recording medium (1) as a focused beam, and a predetermined polarization component included in reflected light from the recording surface (1a) of the magneto-optical recording medium (1) is separated with the polarized beam splitter (14) and picked up. In the optical pickup apparatus, between the polarized beam splitter (14) and the objective lens (13), provided is a phase varying means by which the phase of the beam passed through one side of the optical axis (0-0') is made different from the phase of the beam passed through the other side of the optical axis (0-0') by a predetermined angle. As the phase shifting means, a half-wave plate (15), a prism (39) of a retardation type, or a composite optically active plate (52) can be used. On the side orthogonal to the phase varying means (14), further provided is a beam sensing element for sensing light polarized by the polarized beam splitter.

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