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    • 14. 发明授权
    • Photoelectric device for position measuring
    • 用于位置测量的光电装置
    • US5111040A
    • 1992-05-05
    • US667885
    • 1991-03-12
    • Harald BernardAlfons Spies
    • Harald BernardAlfons Spies
    • G01D5/30G01B11/26G01D5/38
    • G01D5/38
    • The angular graduation of a graduated disk is scanned in a measuring device by a scanning unit by the movement of light beams in two angular graduation areas located diametrically opposite each other. To compensate for wobble errors caused by the wobbling of the graduated disk, the light beam emanating from a light source impinges on the graduated disk at a point outside of the angular graduation and, following reflection and deflection by a triple prism, impinges parallel to itself in the form of a light beam on an impact point in a first the graduation area. The light beam is split into two diffraction beams by the graduation, and meet, after having passed through a deflection prism, at a meeting point in a second angular graduation area. Since the impact point and the meeting point are always located on the same radius, the wobbling of the disk does not have a disadvantageous effect on the accuracy of measurement.
    • 通过扫描单元在测量装置中通过光束在彼此完全相对的两个角度刻度区域中的移动来扫描刻度盘的角度刻度。 为了补偿由刻度盘的摆动引起的摆动误差,从光源发出的光束在角度刻度之外的点处撞击刻度盘,并且在三棱镜反射和偏转之后,与自身平行地撞击 在第一个毕业区域的冲击点上以光束的形式。 光束通过刻度被分成两个衍射光束,并且在经过偏转棱镜之后,在第二角度刻度区域的会合点处相遇。 由于冲击点和汇合点总是位于相同的半径上,因此盘的摆动对测量精度没有不利影响。