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288 records (took 0.049 seconds)

    23.
    发明专利
    未知

    公开(公告)号：DE69029713D1

    公开(公告)日：1997-02-27

    申请号：DE69029713

    申请日：1990-11-15

    Applicant: SONY CORP

    Inventor： WATANABE TETSU ,  YAMAGAMI TAMOTSU ,  FUJITA GORO

    IPC: G11B11/105 ,  G11B11/10

    Abstract: This invention relates to a recording apparatus using magneto-optical effect in which information is recorded on a magneto-optical disc (1) and, more particularly, to a recording apparatus using magneto-optical effect of the magnetic field modulating type in which a light beam is irradiated onto a magneto-optical disc (1) and a magnetic field modulated by a predetermined modulating method is applied to the magneto-optical disc (1). The light beam is irradiated intermittently onto the magneto-optical disc (1) by drive pulses (LP) based on reference clocks (Sck) and the drive pulses (LP) at the positions corresponding to change points of information thinned out in the case where a ratio N of the minimum length between transition to the window margin is larger than 1, thereby accomplishing recording of a correct magnetization pattern.

    24.
    发明专利
    未知

    公开(公告)号：DE68917715T2

    公开(公告)日：1995-01-12

    申请号：DE68917715

    申请日：1989-06-19

    Applicant: SONY CORP

    Inventor： WATANABE TETSU ,  KAWASHIMA TETSUJI ,  FUJITA GORO

    IPC: G11B11/10 ,  G11B11/105 ,  G11B19/14 ,  G11B33/14

    Abstract: In a magneto-optical recording apparatus, light spots are successively formed on a magneto-optical disc (2) at a timing of a predetermined reference clock signal (SCK), and record data are magnetically recorded onto the disc (2) by applying a predetermined modulation magnetic field (HM) of which the polarity is inverted depending on the record data in synchronism with the reference clock signal (SCK). At least one of the timing of irradiating a light beam (LA1) forming the light spots, the light volume of the beam or the irradiation time is controlled depending upon the temperature of the disc (2) and/or the scanning position of the light spot, in order to form a pit (P) at a correct position relative to the timing of the reference clock signal (SCK).

    25.
    发明专利
    未知

    公开(公告)号：DE68917715D1

    公开(公告)日：1994-09-29

    申请号：DE68917715

    申请日：1989-06-19

    Applicant: SONY CORP

    Inventor： WATANABE TETSU ,  KAWASHIMA TETSUJI ,  FUJITA GORO

    IPC: G11B11/10 ,  G11B11/105 ,  G11B19/14 ,  G11B33/14

    Abstract: In a magneto-optical recording apparatus, light spots are successively formed on a magneto-optical disc (2) at a timing of a predetermined reference clock signal (SCK), and record data are magnetically recorded onto the disc (2) by applying a predetermined modulation magnetic field (HM) of which the polarity is inverted depending on the record data in synchronism with the reference clock signal (SCK). At least one of the timing of irradiating a light beam (LA1) forming the light spots, the light volume of the beam or the irradiation time is controlled depending upon the temperature of the disc (2) and/or the scanning position of the light spot, in order to form a pit (P) at a correct position relative to the timing of the reference clock signal (SCK).

    26.
    发明专利
    未知

    公开(公告)号：AT110486T

    公开(公告)日：1994-09-15

    申请号：AT89907287

    申请日：1989-06-19

    Applicant: SONY CORP

    Inventor： WATANABE TETSU ,  KAWASHIMA TETSUJI ,  FUJITA GORO

    IPC: G11B11/10 ,  G11B11/105 ,  G11B19/14 ,  G11B33/14

    Abstract: In a magneto-optical recording apparatus, light spots are successively formed on a magneto-optical disc (2) at a timing of a predetermined reference clock signal (SCK), and record data are magnetically recorded onto the disc (2) by applying a predetermined modulation magnetic field (HM) of which the polarity is inverted depending on the record data in synchronism with the reference clock signal (SCK). At least one of the timing of irradiating a light beam (LA1) forming the light spots, the light volume of the beam or the irradiation time is controlled depending upon the temperature of the disc (2) and/or the scanning position of the light spot, in order to form a pit (P) at a correct position relative to the timing of the reference clock signal (SCK).

    MAGNETO-OPTICAL RECORDING MEDIUM
    28.
    发明公开
    MAGNETO-OPTICAL RECORDING MEDIUM 有权
    光磁记录介质

    公开(公告)号：EP1521254A4

    公开(公告)日：2008-05-28

    申请号：EP03741199

    申请日：2003-07-04

    Applicant: SONY CORP

    Inventor： MIKI TAKESHI ,  FUJITA GORO

    IPC: G11B7/007 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/105

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

    Abstract: A magneto-optical recording medium of domain wall motion detection type in the form of groove recording for recording a signal in a signal recording area within a groove formed along a recording track. The radius of curvature R1 of the shoulder portion, adjacent to a groove, of the land between grooves in the cross section taken perpendicularly to the recording track is 30 nm or less, and the radius of curvature R2 of the inner edge portion, adjacent to the land, of the groove where a signal is recorded in the cross section taken perpendicularly to the recording track is 20 nm or more. The recording power margin is increased, the jitter is improved, and the error rate is also improved.

    OPTICAL RECORDING MEDIUM
    29.
    发明公开
    OPTICAL RECORDING MEDIUM 审中-公开
    OPTISCHES AUFZEICHNUNGSMEDIUM

    公开(公告)号：EP1267336A4

    公开(公告)日：2007-02-14

    申请号：EP02729517

    申请日：2002-01-09

    Applicant: SONY CORP

    Inventor： FUJITA GORO ,  SAKAMOTO TETSUHIRO

    IPC: G11B7/24 ,  G11B7/00 ,  G11B7/007 ,  G11B7/26 ,  G11B27/19 ,  G11B27/24

    CPC classification number: G11B27/24 ,  G11B7/00 ,  G11B7/007 ,  G11B7/261 ,  G11B7/263 ,  G11B27/19 ,  G11B2220/20 ,  G11B2220/2529

    Abstract: An optical recording medium having wobbles disposed desirably in view of a production process when wobbles are provided at part of the boundaries between lands and grooves. An optical recording medium comprising an optical recording layer (16) and a protection layer (17) having uneven shapes in conformity with grooves (15a) and laminated on a disc-form disk substrate (15) having grooves (15a) formed in the surface thereof and having protrusions and recesses divided for each track region by the grooves (15a), the optical recording medium being formatted so as to use both the protrusions (lands (L)) and the recesses (grooves (G)) as recording areas, wherein wobbles (W) for providing clock information or address information are formed on side wall portions, out of a pair of opposing side walls constituting the grooves (15a), on the inner peripheral side of the disk substrate (15) as viewed from recesses (grooves (G)) and on the outer peripheral side of the disk substrate (15) as viewed from protrusions (lands (L)).

    Abstract translation: 考虑到在纹间表面和凹槽之间的边界的一部分处设置摆动时的制造工艺，期望具有摆动的光学记录介质。 一种光记录媒体，其特征在于，在形成有槽部（15a）的盘状盘片基板（15）上层叠形成与槽部（15a）一致的凹凸形状的光记录层（16）和保护层（17） 并且具有由凹槽（15a）为每个轨道区域分开的凸起和凹槽，光学记录介质被格式化为使用凸起（凸台（L））和凹槽（凹槽（G））两者作为记录区域， 其中用于提供时钟信息或地址信息的摆动（W）形成在盘基底（15）的内周侧上的从构成凹槽（15a）的一对相对侧壁中的侧壁部分上，如从凹槽 （凹槽（G））并且在从凸起（平台（L））观察时位于盘基板（15）的外周侧。

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