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由于弹性多齿分度盘广泛应用于测角中,角度测量的精度越来越高。因此,对影响精度的各种因素都必须加以考虑,如光管轴线的调整,多面棱体的平面度误差及其工作面与下底基面的垂直度误差等,都会给测量带来误差。图为自准直光管的视场图,yy轴是安放多面棱体的转台轴向;十字线是镜面反射回来自准直光管指标线的像;ss是测反射象位移用的分划板;xx是转动多面棱体时十字线象移动的方向。如图所示,当自准直光管偏斜时,分划板十字线竖线与yy轴倾斜为Φ角,
Due to the flexible multi-tooth indexing disc is widely used in angle measurement, the angle measurement accuracy is getting higher and higher. Therefore, various factors affecting the accuracy must be taken into consideration. For example, the adjustment of the axis of the light pipe, the flatness error of the polyhedral prism and the squareness error between the working face and the bottom base surface all bring errors to the measurement. The picture shows the field of view of self-collimating light pipe, the yy axis is the axial direction of the turntable on which the polyhedral prism is placed; the crosshair is specularly reflected back from the indicator line of the collimator; the ss is the subdivision Board; xx is the direction in which the crosshair moves as the polygons are rotated. As shown in the figure, when the self-collimated light pipe is inclined, the vertical line of the reticle cross line and the yy axis are inclined to the angle of φ,