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    RECORDING MEDIUM DRIVE DEVICE HAVING TILT DETECTING MEANS AND TILT DETECTION METHOD
    1.
    发明申请
    RECORDING MEDIUM DRIVE DEVICE HAVING TILT DETECTING MEANS AND TILT DETECTION METHOD 审中-公开
    具有倾斜检测手段和倾斜检测方法的记录介质驱动装置

    公开(公告)号：WO0077780A8

    公开(公告)日：2001-03-08

    申请号：PCT/JP0003775

    申请日：2000-06-09

    Applicant: SONY CORP ,  FUJITA GORO

    Inventor： FUJITA GORO

    IPC: G11B7/007 ,  G11B7/09 ,  G11B7/095

    CPC classification number: G11B7/00718 ,  G11B7/007 ,  G11B7/0938 ,  G11B7/0956

    Abstract: An optical disc reproduction device (10) comprises an optical pickup (11) for reading a digital data recorded in an optical disc, an amplitude detection circuit (18) for detecting an amplitude of wobble component signal having passed through a band pass filter (14), and a tilt detection, object value setting and drive signal generation circuit (23) for performing a detection of a tilt amount. The optical disc reproduction device (10) irradiates a laser light to the optical disc, whose one side wall in its recording area is being wobbled at a predetermined cycle, by the optical pickup (11), detects the amplitude of each wobble component signal based on a return light in case where the laser light is positioned in inner and outer periphery sides of the optical disc than the wobbled portion by the amplitude detection circuit (18), and finds a difference value of the amplitude of each wobble component signal as a tilt indication value by the tilt detection, object value setting and drive signal generation circuit (23).

    Abstract translation: 一种光盘再现装置（10）包括用于读取记录在光盘中的数字数据的光学拾取器（11），用于检测通过带通滤波器（14）的摆动分量信号的振幅的振幅检测电路（18） ）和用于执行倾斜量的检测的倾斜检测，对象值设置和驱动信号生成电路（23）。 光盘再现装置（10）通过光学拾取器（11）将激光照射到其记录区域的一个侧壁以预定的周期摆动的光盘，基于每个摆动分量信号的幅度检测 在通过振幅检测电路（18）将激光定位在光盘的内周侧和外周侧的情况下的返回光上，并且将每个摆动分量信号的幅度的差值作为 倾斜检测，物体值设定和驱动信号生成电路（23）的倾斜指示值。

    4.
    发明专利
    未知

    公开(公告)号：DE69331163D1

    公开(公告)日：2001-12-20

    申请号：DE69331163

    申请日：1993-02-19

    Applicant: SONY CORP

    Inventor： HORIMAI HIDEYOSHI ,  FUJITA GORO

    IPC: G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/14 ,  G11B7/26 ,  G11B20/14 ,  H03M5/14 ,  G11B7/00 ,  G11B7/095

    Abstract: An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of information data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the information recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first and second light receiving sections.

    9.
    发明专利
    未知

    公开(公告)号：AT441186T

    公开(公告)日：2009-09-15

    申请号：AT03741199

    申请日：2003-07-04

    Applicant: SONY CORP

    Inventor： MIKI TAKESHI ,  FUJITA GORO

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

    Abstract: A magneto-optical recording medium in which the inside of grooves formed along recording tracks is a signal recording area in groove recording, and the domain wall displacement detection method is employed; and a curvature radius R1, in the cross section perpendicular to the recording tracks, of a shoulder portion of a land separating the grooves that is adjacent to the groove is 30 nm or less and a curvature radius R2, in the cross section perpendicular to the recording tracks, of the inside edge portion of the groove for the recording that is adjacent to the land is 20 nm or more, so that a wide recording power margin can be obtained, the jitter can be improved, and the error rate can also be improved

    EVALUATION APPARATUS, EVALUATION METHOD, AND OPTICAL DISK MANUFACTURING METHOD
    10.
    发明专利
    EVALUATION APPARATUS, EVALUATION METHOD, AND OPTICAL DISK MANUFACTURING METHOD 未知

    公开(公告)号：HK1099402A1

    公开(公告)日：2007-08-10

    申请号：HK07105410

    申请日：2007-05-22

    Applicant: SONY CORP

    Inventor： ASHIZAKI KOJI ,  FUJITA GORO ,  KOBAYASHI SEIJI

    IPC: G11B20090101

    Abstract: An evaluation apparatus for evaluating the recording quality of secondary data recorded on an optical disk recording medium on which primary data is recorded as combinations of pits and lands includes the following elements: a reading unit operable to read a signal on the basis of reflected light information of a laser beam of playback power irradiated onto the optical disk recording medium; a binarizing unit operable to slice the signal read by the reading unit at a predetermined level and output the result as a binary signal; and a jitter calculating unit operable to calculate a jitter of edge shift amounts on the basis of a standard deviation and an average of the edge shift amounts and information on a predetermined minimum shift amount determined as the minimum amount of shift that can be detected by a binary decision as an edge shift.

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