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自准直仪或具有自准原理的装置,可用来测量机床、仪器导轨的直线性;机床和仪器垂直导轨与工作台的垂直性;可以进行小角度的精密测量,(例如用比较法检定角度块、用两个自准直仪组合定角检定多面棱体)以及用于检定工作中的定位(例如检定光字分度头、分度台等的分度精度时的定位)等,这些方法在某些量仪的检定规程上已有叙述并为大多数计量人员所熟悉,下面介绍利用自准直仪
Self-collimator or self-preconditioning device can be used to measure the linearity of machine tool and instrument guide rail. The verticality of vertical guide rail and worktable of machine tool and instrument can be used for precision measurement with small angle (for example, Block, with two self-collimator combination of fixed-angle multi-faceted prism) as well as for the verification of the positioning (such as testing the optical sub-indexing head, indexing station indexing accuracy positioning), etc., these methods In the measurement of some of the instruments have been described and approved by most metrologists familiar with the following describes the use of self-collimator