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    • 1. 发明授权
    • Test system for optical disks
    • 光盘测试系统
    • US4850695A
    • 1989-07-25
    • US101586
    • 1987-09-28
    • Kenta MikuriyaAkira OhyaMinoru NakagawaraHideo HirukawaShoji Uehara
    • Kenta MikuriyaAkira OhyaMinoru NakagawaraHideo HirukawaShoji Uehara
    • G01B11/24G01B11/30G01M11/00G01N21/88G01N21/93G01N21/95G11B7/0037G11B7/085G11B7/095G11B7/26G11B33/10
    • G01B11/303G01B11/24G01M11/00G11B33/10G11B7/00375G11B7/085G11B7/0956
    • A test system for optical disks, comprising a spindle motor for clamping and rotating an optical disk at a constant speed; an encoder for generating a pulse output corresponding to the angle of rotation of the motor; a measuring head comprising focus and tracking servo mechanisms for causing the focal point of a laser beam irradiating the disk to follow the guide groove thereof, and a displacement detector for optically detecting the displacement of a focusing lens driven by the servo mechanisms; the measuring head being operative to generate an output signal proportional to the displacement of the focusing lens; a feed mechanism for moving the measuring head in the radial direction of the disk; a control circuit for controlling the operations of the motor, the servo mechanisms and the feed mechanism; an analog to digital converter for converting the output of the measuring head at a timing according to the pulse output of the encoder; and a computer for commanding the control circuit and for computing the output of the analog to digital converter to determine the shape of the disk, whereby displacement of the focusing lens is directly detected by the displacement detector.
    • 一种用于光盘的测试系统,包括用于以恒定速度夹紧和旋转光盘的主轴电机; 用于产生对应于所述电动机的旋转角度的脉冲输出的编码器; 测量头,其包括聚焦和跟踪伺服机构,用于使照射盘的激光束的焦点跟随其导向槽;以及位移检测器,用于光学地检测由伺服机构驱动的聚焦透镜的位移; 测量头可操作以产生与聚焦透镜的位移成比例的输出信号; 用于沿着盘的径向方向移动测量头的进给机构; 用于控制电动机,伺服机构和进给机构的操作的控制电路; 模拟数字转换器,用于根据编码器的脉冲输出的定时转换测量头的输出; 以及用于命令控制电路并计算模数转换器的输出以确定盘的形状的计算机,由此通过位移检测器直接检测聚焦透镜的位移。