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圆分度器,如多面棱体、多齿分度盘等是圆周角分度的标准器具,要求较高的检定精度。目前,多面棱体检定极限误差要求不大于0.5弧秒,国内研制的多齿分度盘制造精度达0.2弧秒,而美国莫尔公司生产的多齿分度盘制造精度已达0.1弧秒。一般,用圆分度测角仪器对它们进行绝对测量是难以保证精度的。全组合检定法的优点就在于不需要更高精度圆周角分度仪器,只用小角度测量装置,通过一
Circular indexer, such as polygon prism, multi-tooth indexing dial is a standard tool for indexing of the circumference angle, requiring high accuracy. At present, the limit error of multi-faceted prism test is less than 0.5 arc second. The manufacturing precision of multi-tooth indexing disc developed in China reaches 0.2 arc second. The manufacturing precision of multi-tooth index dial manufactured by Moore Company in the United States has reached 0.1 arc second. In general, it is difficult to ensure the accuracy of absolute measurement of the angular graduation angle measuring instrument. The advantage of the all-in-one assay is that it does not require a more precise indexing of circumferential angles, only a small angle measurement device,