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    • 2. 发明授权
    • Optical disk apparatus for producing information recorded on a recording
track
    • 用于产生记录在记录磁道上的信息的光盘装置
    • US5440536A
    • 1995-08-08
    • US202518
    • 1994-02-28
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • G11B7/00G11B7/0045G11B7/005G11B7/09G11B7/13
    • G11B7/131G11B7/0045G11B7/0943
    • An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.
    • 光盘装置包括被分成八个部分的光电检测器,其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中,这八个段分别以记录信息再现,跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现,八个段被组合在三个分段单元RC1,RC2和RC3中,它们在彼此平行的方向上延伸,使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1,RC2和RC3垂直于光盘的记录轨道定位,并分别产生表示激光束点的激光束强度的三个信号C,R和L。 这样获得的信号C乘以常数K,然后加到其他信号R和L.通过选择合适的值作为常数K,可以减少再现信号中的串扰分量。
    • 3. 发明授权
    • Optical disk apparatus for optically recording or reproducing
information on an optical recording medium
    • 用于在光学记录介质上光学记录或再现信息的光盘装置
    • US5347504A
    • 1994-09-13
    • US993384
    • 1992-12-18
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • G11B7/00G11B7/0045G11B7/005G11B7/09G11B7/13
    • G11B7/131G11B7/0045G11B7/0943
    • An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.
    • 光盘装置包括被分成八个部分的光电检测器,其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中,这八个段分别以记录信息再现,跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现,八个段被组合在三个分段单元RC1,RC2和RC3中,它们在彼此平行的方向上延伸,使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1,RC2和RC3垂直于光盘的记录轨道定位,并分别产生表示激光束点的激光束强度的三个信号C,R和L。 这样获得的信号C乘以常数K,然后加到其他信号R和L.通过选择合适的值作为常数K,可以减少再现信号中的串扰分量。
    • 4. 发明授权
    • Optical disk apparatus for optically recording or reproducing
information on an optical recording medium
    • 用于在光学记录介质上光学记录或再现信息的光盘装置
    • US5430701A
    • 1995-07-04
    • US202822
    • 1994-02-28
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • Noboru ItoShinichi TanakaHidenori WadaSadao MizunoHideki Hayashi
    • G11B7/00G11B7/0045G11B7/005G11B7/09G11B7/13
    • G11B7/131G11B7/0045G11B7/0943
    • An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.
    • 光盘装置包括被分成八个部分的光电检测器,其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中,这八个段分别以记录信息再现,跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现,八个段被组合在三个分段单元RC1,RC2和RC3中,它们在彼此平行的方向上延伸,使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1,RC2和RC3垂直于光盘的记录轨道定位,并分别产生表示激光束点的激光束强度的三个信号C,R和L。 这样获得的信号C乘以常数K,然后加到其他信号R和L.通过选择合适的值作为常数K,可以减少再现信号中的串扰分量。