三轴转台轴线垂直度的测试方法

为了测量中环轴、内环轴不能全回转的三轴转台回转轴线的垂直度误差，设计了利用自准直仪和平面反射镜将有限回转轴系轴线引出的方法。根据自准直仪读数与平面反射镜对回转轴线的垂直度误差、自准直仪的光轴与回转轴线的平行度误差之间的关系，利用最小二乘法引出外环轴处于不同位置时的中环轴轴线、内环轴轴线，实现了三轴转台轴线垂直度的测量。

The Method of Measuring Perpendicularities of Three-axis Turntable

In order to measure axis perpendicularity errors of three-axis turntable whose inner axis and middle axis cannot rotate in full cir-cle , a method of leading out the axis lines of limited rotating axis system was designed by using an autocollimator and reflected mirrors. According to the relationships among the readouts of the autocollimator, the perpendicularity errors of mirror planes versus corresponding axis lines, and the parallelism errors of axis lines versus the optic axis line of the autocollimator, least square method was used to lead out the middle axis lines and inner axis line while the outer axis is in different positions. Finally the measurement of axis perpendicularities is realized.