光学、数显分度头和光学、数显分度台(以下分别简称分度头、分度台)是以光学度盘,或圆光栅,或圆感应同步器等作为圆分度元件(以下统称圆分度元件)进行角度测量或加工的计量仪器。分度头广泛应用于机械制造和计量部门,主要用于分度盘、分度板、齿轮和花键轴等零件的测量或加工,配以阿贝测量头后还可以测量凸轮和圆柱斜齿轮螺旋角等参数。分度台可以作为精密铣床、座标镗床、加 Optical, digital indexing head and optical, digital indexing table (hereinafter referred to as indexing head, indexing table) is based on the optical disk, or grating, or induction inductors, etc. as a circular indexing element (the following Collectively referred to as round indexing element) for measuring or processing angle measurement instruments. The indexing head is widely used in the machinery manufacturing and metrology department. It is mainly used for the measurement or processing of the parts such as the index plate, index plate, gear and spline shaft. It can also measure the cam and cylindrical helical gear Helix angle and other parameters. Indexing table can be used as a precision milling machine, coordinate boring machine, plus