一、前言圆光栅和编码盘、度盘一样,是一个测角元件。近年来,对精确自动测量转角的要求大大增长,作为自动测量仪器和装备的关键元件圆光栅的需求也日趋迫切。很多部门在精密加工、精密测量和自动控制等方面,使用圆光栅就可以实现自动测量、数显和数控。目前,国内许多单位都在研究和制作圆光栅,圆光栅的制作方法有刻划法(即机械刀刻 First, the preface Circular grating and encoding disc, dial, is a goniometer components. In recent years, the requirements for accurate and automatic measurement of rotation angles have greatly increased. As a key component of automatic measuring instruments and equipment, the demands of circular gratings have become increasingly urgent. Many departments in the precision machining, precision measurement and automatic control, etc., the use of circular grating can automatically measure, digital display and CNC. At present, many units in China are studying and making circular gratings. The production method of circular gratings is engraved (that is,