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    • 93. 发明申请
    • ENCODER
    • 编码器
    • US20080258050A1
    • 2008-10-23
    • US12144936
    • 2008-06-24
    • Susumu MAKINOUCHIToru IMAIAkihiro WATANABE
    • Susumu MAKINOUCHIToru IMAIAkihiro WATANABE
    • G01D5/34
    • G01D5/38G01D5/34784
    • A light via first and second index scales is split by a beam splitter, and one of the split lights is received by a first light-receiving element via a movable scale and also the other of the split lights is received by a second light-receiving element via a reference scale, and therefore by computing positional information of the movable scale using an output of the first light-receiving element (a first output) and an output of the second light-receiving element (a second output), movement information of the movable scale can be measured with high precision without being affected by drift of the modulation center (the oscillation center) of the beam.
    • 通过第一和第二索引刻度的光被分束器分开,并且其中一个分光灯通过可移动刻度被第一光接收元件接收,另一个分光灯由第二光接收 并且因此通过使用第一受光元件(第一输出)的输出和第二光接收元件的输出(第二输出)来计算可移动刻度的位置信息,以及 可以高精度地测量可移动刻度,而不受波束的调制中心(振荡中心)的漂移的影响。