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在测角计中把光学分度盘和光电编码圆盘用作角度标准。仪器的精度在很大程度上与分度盘的加工精度和它的装配有关。分度的精度参数可分为:分度误差、安装的偏心度、刻线宽度差异、透光线的相对误差、定心盘的形状误差、轴向窜动等。其中主要的误差是安装偏心度和分度误差。在精密测角仪器中要进行误差校正。本文讨论校正偏心度和分度盘或编码盘分度误差的方法。
In the goniometer the optical sub-dial and the photoelectric encoder disk are used as the angle standard. The accuracy of the instrument is largely related to the accuracy of the indexing plate and its assembly. The accuracy of indexing can be divided into: indexing error, eccentricity of installation, difference of groove width, relative error of light transmission line, shape error of centering plate, axial movement and the like. The main error is the installation of eccentricity and indexing error. In the precision goniometer to be error correction. This article discusses ways to correct for eccentricity and indexing errors for indexing or encoder discs.