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    • 1. 发明授权
    • Apparatus for and method of detecting pre-pit information
    • 检测预坑信息的装置和方法
    • US6091682A
    • 2000-07-18
    • US90706
    • 1998-06-04
    • Hiroshi Hikima
    • Hiroshi Hikima
    • G06F7/22G11B7/00G11B7/005G11B7/007G11B20/10
    • G11B7/005G11B7/007G11B7/00745
    • An information detecting device detects information recorded in a form of pre-pits on a storage medium which is recorded with movement control information recorded by wobbling information tracks at a frequency corresponding to the movement control information and the recording control information recorded by forming the pre-pits on neighboring tracks of the information track. The device includes: a pickup for irradiating a light beam on the information track and the neighboring tracks at the same time and for outputting a reproduction signal based on the light beam reflected by the information track and the neighboring tracks; a wobbling signal extracting unit for extracting only the wobbling signal indicating the movement control information from the reproduction signal outputted; a pre-pit signal detector for detecting a pre-pit signal mixed with the wobbling signal from the reproduction signal outputted; a measuring unit for measuring a pre-pit signal absent period, in which the pre-pit signal detector detects no pre-pit signal, on a wobbling signal period basis; and a detection enabling unit for judging whether or not the pre-pit signal absent period accords with a first predetermined period, and for enabling the pre-pit signal detection by the pre-pit signal detector in a second predetermined period determined on the basis of the wobbling signal period if the pre-pit signal absent period accords with the first predetermined period.
    • 信息检测装置以存储介质的形式进行检测的信息,该存储介质记录有通过摆动信息轨迹记录的移动控制信息,该移动控制信息以对应于移动控制信息和记录的记录控制信息的频率记录, 坑在信息轨道的相邻轨道上。 该装置包括:用于同时在信息轨道和相邻轨道上照射光束并用于基于由信息轨道和相邻轨道反射的光束输出再现信号的拾取器; 摆动信号提取单元,用于从输出的再现信号中仅提取指示移动控制信息的摆动信号; 一个预凹坑信号检测器,用于根据输出的再现信号检测与摆动信号混合的预凹陷信号; 测量单元,用于在摆动信号周期的基础上测量其中预凹坑信号检测器不检测到预凹陷信号的预凹陷信号缺失周期; 以及检测使能单元,用于判断所述预凹坑信号不存在周期是否符合第一预定周期,并且用于在所述预凹坑信号检测器的预定凹坑信号检测在基于 如果预凹坑信号不存在周期与第一预定周期一致则摆动信号周期。
    • 3. 发明授权
    • Prepit detecting apparatus
    • US06519214B1
    • 2003-02-11
    • US09407704
    • 1999-09-28
    • Hiroshi Hikima
    • Hiroshi Hikima
    • G11B700
    • G11B27/24G11B7/005G11B7/0053G11B7/007G11B7/00745G11B7/0938G11B7/094G11B7/0943G11B7/24082G11B2220/218G11B2220/2562
    • A prepit detecting apparatus which uses an optical recording medium having information recording tracks on which information is recorded and guide tracks each of which guides a light beam to the information recording track and on which prepits for saving pre-information are formed such that the light beam is applied to the information track of the optical recording medium, the prepit detecting apparatus comprising: light receiving means divided into a first divided light receiving portion and a second divided light receiving portion divided along an optically parallel division line in a direction of tangent of the information tracks and arranged to receive reflected light of the light beam with which the optical recording medium has been irradiated; and a difference calculator for calculating the difference between a first read signal output from the first divided light receiving portion and a second read signal output from the second divided light receiving portion so that the prepit is detected in response to a differential signal output from the difference calculator, wherein the difference calculator incorporates amplitude correction means for causing the amplitudes of the first read signal and the second read signal to coincide with a reference level, and the difference between the first read signal and the second read signal corrected by the amplitude correction means is calculated.
    • 8. 发明授权
    • Recycled slide gate plate
    • 回收滑板门板
    • US5730892A
    • 1998-03-24
    • US773038
    • 1996-12-24
    • Shigeki NiwaEtsuhiro HasebeKazuo ItohToshihiro IndohKohji SaitohTamotsu WakitaMasahiko UchitaHiroshi Hikima
    • Shigeki NiwaEtsuhiro HasebeKazuo ItohToshihiro IndohKohji SaitohTamotsu WakitaMasahiko UchitaHiroshi Hikima
    • B22D11/10B22D41/28B22D41/30
    • B22D41/28Y10S266/01
    • The present invention provides a recycle slide gate plate, said slide gate plate being connected to a lower portion of a molten metal container and used for sliding a plate to control a flow of molten metal drained from the molten metal container, comprising an upper plate and/or a lower plate obtained by polishing a sliding surface of a slide gate plate used at least one time, at a predetermined smoothness tolerance, a tubular ring fixed to a through hole obtained by cutting out a molten metal outlet portion of the upper plate and/or the lower plate having a projecting portion on a side opposite to a sliding surface of the upper plate and/or the lower plate, said projecting portion having a total height of a sum of a height dimension substantially equal to a height of a projecting portion of a new plate before use and a thickness dimension to be reduced by polishing out the sliding surface, the projecting portion being provided with a molten metal outlet hole formed inside the projecting portion, and a cushion plate fixed to a flat surface in a side opposite to the sliding surface of the upper plate and/or the lower plate, having a thickness necessary for making a thickness dimension of a flat surface reduced by polishing the upper plate and/or the lower plate be substantially equal to a thickness of the flat surface before polishing.
    • 本发明提供了一种再循环滑动门板,所述滑动门板连接到熔融金属容器的下部,并用于滑动板以控制从熔融金属容器排出的熔融金属的流动,包括上板和 /或通过在预定的平滑度下至少一次使用滑动门板的滑动表面抛光而获得的下板,固定到通过切割上板的熔融金属出口部而获得的通孔的管状环, /或下板具有在与上板和/或下板的滑动面相对的一侧上的突出部分,所述突出部分的总高度总高度大致等于突出部分的高度 使用前的新板的一部分和通过抛光滑动面而减小的厚度尺寸,突出部设置有形成在工程内的熔融金属出口孔 以及固定到与上板和/或下板的滑动面相反侧的平坦表面上的缓冲板,具有通过抛光上板而使平坦表面的厚度尺寸减小所需的厚度 和/或下板基本上等于抛光前的平坦表面的厚度。
    • 9. 发明授权
    • Prepit detecting apparatus
    • 预处理检测装置
    • US06707780B2
    • 2004-03-16
    • US10318077
    • 2002-12-13
    • Hiroshi Hikima
    • Hiroshi Hikima
    • G11B700
    • G11B27/24G11B7/005G11B7/0053G11B7/007G11B7/00745G11B7/0938G11B7/094G11B7/0943G11B7/24082G11B2220/218G11B2220/2562
    • A prepit detecting apparatus which uses an optical recording medium having information recording tracks on which information is recorded and guide tracks each of which guides a light beam to the information recording track and on which prepits for saving pre-information are formed such that the light beam is applied to the information track of the optical recording medium, the prepit detecting apparatus comprising: light receiving means divided into a first divided light receiving portion and a second divided light receiving portion divided along an optically parallel division line in a direction of tangent of the information tracks and arranged to receive reflected light of the light beam with which the optical recording medium has been irradiated; and a difference calculator for calculating the difference between a first read signal output from the first divided light receiving portion and a second read signal output from the second divided light receiving portion so that the prepit is detected in response to a differential signal output from the difference calculator, wherein the difference calculator incorporates amplitude correction means for causing the amplitudes of the first read signal and the second read signal to coincide with a reference level, and the difference between the first read signal and the second read signal corrected by the amplitude correction means is calculated.
    • 一种预凹坑检测装置,其使用具有记录有信息的信息记录轨道的光记录介质,以及导光轨道,每个引导轨道将光束引导到信息记录轨道,并且在其上形成用于保存预信息的预凹坑,使得光束 预处理检测装置包括:光接收装置,被分为第一分割光接收部分和第二分光接收部分,沿着光学平行分割线沿着光学平行分割线沿着 信息轨道,并被布置成接收光记录介质已照射的光束的反射光; 以及差分计算器,用于计算从第一分割光接收部分输出的第一读取信号与从第二分割光接收部分输出的第二读取信号之间的差异,使得根据差异输出的差分信号检测预置坑 计算器,其中所述差分计算器包括用于使所述第一读取信号和所述第二读取信号的幅度与参考电平一致的幅度校正装置,以及由所述幅度校正装置校正的所述第一读取信号和所述第二读取信号之间的差异 被计算。
    • 10. 发明授权
    • Prepit detection unit
    • 预浸检测单元
    • US06337838B1
    • 2002-01-08
    • US09421856
    • 1999-10-20
    • Hiroshi HikimaJunji Tanaka
    • Hiroshi HikimaJunji Tanaka
    • G11B390
    • G11B7/005
    • A prepit detection unit for detecting prepits in an optical recording and reproducing apparatus for recording and reproducing information on a recordable, optical record medium including preinformation such as address information in a prepit form. In the prepit detection unit, for first and second divisional RF signals output from a pickup being divided into a first divisional light reception part and a second divisional light reception part by a division line optically parallel to the tangential direction of an information track for receiving reflected light from the optical record medium, mark sections and space sections are clamped by potential correction circuits and a difference is found by a radial push-pull circuit.
    • 一种用于在光学记录和再现装置中检测预凹坑的预凹坑检测单元,用于在可记录的光学记录介质上记录和再现信息,包括诸如预制图形的地址信息之类的预信息。 在预处理检测单元中,对于从拾取器输出的第一和第二分频RF信号,通过与用于接收反射的信息轨迹的切线方向光学平行的划分线分成第一分光接收部分和第二分光接收部分 来自光学记录介质的光,标记部分和空间部分被电位校正电路钳位,并且通过径向推挽电路发现差异。