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    • 3. 发明授权
    • Photoelectric encoder
    • 光电编码器
    • US07332709B2
    • 2008-02-19
    • US11598733
    • 2006-11-14
    • Toru Imai
    • Toru Imai
    • G01D5/34
    • G01D5/34715G01D5/38
    • A photoelectric encoder includes a light source of an illumination light beam. The encoder also includes a movable grating which has grating lines and which is displaceable in a direction intersecting the grating lines. An index grating serves as a reference for displacement of the movable grating. A light-receiver receives the illumination light beam via the movable grating and the index grating. A modulator periodically changes a light beam outgoing from the index grating. A displacement detector detects the displacement of the movable grating based on the illumination light beam received by the light-receiver. Accordingly, a signal representing the displacement of a movable body can be accurately generated even when fluctuation of the attitude of the grating occurs.
    • 光电编码器包括照明光束的光源。 编码器还包括具有光栅线的可移动光栅,其可沿与光栅线交叉的方向移位。 索引光栅用作可移动光栅的位移的参考。 光接收器通过可移动光栅和索引光栅接收照明光束。 调制器周期性地改变从折射光栅出射的光束。 位移检测器基于由光接收器接收的照明光束检测可移动光栅的位移。 因此,即使发生光栅的姿态的波动,也能够精确地生成表示可动体的位移的信号。
    • 4. 发明申请
    • Photoelectric encoder
    • 光电编码器
    • US20070057168A1
    • 2007-03-15
    • US11598733
    • 2006-11-14
    • Toru Imai
    • Toru Imai
    • G01D5/34
    • G01D5/34715G01D5/38
    • A photoelectric encoder includes a light source of an illumination light beam; a movable grating which has grating lines and which is displaceable in a direction intersecting the grating lines; an index grating which serves as a reference for displacement of the movable grating; a light-receiver which receives the illumination light beam via the movable grating and the index grating; a modulator which periodically changes a light beam outgoing from the index grating; and a displacement detector which detects the displacement of the movable grating based on the illumination light beam received by the light-receiver. Accordingly, a signal representing the displacement of a movable body can be accurately generated even when the attitude of the grating occurs.
    • 光电编码器包括照明光束的光源; 可移动光栅,其具有光栅线,并且可沿与光栅线相交的方向移位; 用作可移动光栅位移参考的索引光栅; 接收经由可移动光栅和折射光栅的照明光束的光接收器; 周期性地改变从折射光栅出射的光束的调制器; 以及位移检测器,其基于由光接收器接收的照明光束来检测可移动光栅的位移。 因此,即使当光栅的姿态出现时,也能够精确地生成表示可动体的位移的信号。