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    2.
    发明专利
    未知

    公开(公告)号：DE69830214T2

    公开(公告)日：2006-02-02

    申请号：DE69830214

    申请日：1998-05-27

    Applicant: SONY CORP

    Inventor： ARIMA MITSUO

    IPC: G11B7/135 ,  G11B7/00 ,  G11B7/26

    Abstract: A light exposure device for a master optical disc capable of exposing to light a desired area of the master optical disc to high precision for forming crests and recesses of broad widths therein to high precision. Specifically, the light exposure device for the master optical disc exposes to light the portions of a photoresist coated on a substrate of the optical disc adapted to form a pre-set pattern corresponding to recorded information signals. The light exposure device for the master optical disc includes a light-condensing optical element 15 for condensing the laser light radiated from a light source, a deflecting optical element 16 for wobbling the laser light condensed by the light-condensing optical element 15 and an optical system 17 arranged downstream of the focal point position of the light-condensing optical element 15 for re-imaging the laser light wobbled by the deflecting optical element 16 at a location upstream of the objective lens.

    3.
    发明专利
    未知

    公开(公告)号：DE69830214D1

    公开(公告)日：2005-06-23

    申请号：DE69830214

    申请日：1998-05-27

    Applicant: SONY CORP

    Inventor： ARIMA MITSUO

    IPC: G11B7/135 ,  G11B7/26 ,  G11B7/00

    Abstract: A light exposure device for a master optical disc capable of exposing to light a desired area of the master optical disc to high precision for forming crests and recesses of broad widths therein to high precision. Specifically, the light exposure device for the master optical disc exposes to light the portions of a photoresist coated on a substrate of the optical disc adapted to form a pre-set pattern corresponding to recorded information signals. The light exposure device for the master optical disc includes a light-condensing optical element 15 for condensing the laser light radiated from a light source, a deflecting optical element 16 for wobbling the laser light condensed by the light-condensing optical element 15 and an optical system 17 arranged downstream of the focal point position of the light-condensing optical element 15 for re-imaging the laser light wobbled by the deflecting optical element 16 at a location upstream of the objective lens.

    4.
    发明专利
    未知

    公开(公告)号：DE60233135D1

    公开(公告)日：2009-09-10

    申请号：DE60233135

    申请日：2002-06-12

    Applicant: SONY CORP

    Inventor： NAKAYAMA HIROSHI ,  TAKEUCHI ATSUSHI ,  ARIMA MITSUO

    IPC: G11B7/007 ,  G11B7/24 ,  G11B7/013 ,  G11B7/26 ,  G11B11/105

    Abstract: An optical recording medium which has a spiral track or concentric tracks and on which data is optically recorded. A data recording/reproducing area of the optical recording medium is radially divided into zones. Each zone is divided into sectors each having an address portion including a pit having address information and a data portion composed of only grooves. The numbers of sectors of the zones are different from one another.

    MAGNETO OPTICAL RECORDING MEDIUM
    6.
    发明公开
    MAGNETO OPTICAL RECORDING MEDIUM 审中-公开
    磁

    公开(公告)号：EP1439530A4

    公开(公告)日：2008-01-16

    申请号：EP02800721

    申请日：2002-10-01

    Applicant: SONY CORP

    Inventor： WADA YUTAKA ,  NAKAYAMA HIROSHI ,  TAKEUCHI ATSUSHI ,  ARIMA MITSUO

    IPC: G11B11/105 ,  G11B7/007 ,  G11B7/24

    CPC classification number: G11B11/10586 ,  G11B7/00718 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/10578 ,  G11B11/10584

    Abstract: A magneto-optical recording medium for MSR reproduction of a high signal quality wherein both faces of a land and a groove are used as recording tracks is disclosed. A magneto-optical recording medium wherein both of a land portion and a groove portion on a substrate are used as recording and reproduction tracks while laser light having passed through an objective lens is illuminated on the recording and reproduction tracks is configured that a ratio Wg/Wl between a track width (Wg) of the groove portion and a track width (Wl) of the land portion is equal to or higher than 0.65 but equal to or lower than 0.85, and, where the wavelength of the laser light is represented by ", the numerical aperture of the objective lens by NA and the refractive index of the substrate by n, the groove distance Gp is equal to or greater than 1.0 x "/NA but equal to or smaller than 1.2 x "/NA and besides the depth D of the groove is equal to or greater than "/11n but equal to or smaller than "/8n.

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