Horizontal Axis Unit

The horizontal axis unit includes horizontal axis, its axletree and other sections. The horizontal axis should be flexibly rotated in its axletree, meantime should be vertical to the vertical one, and keep unchangeable position when turning. Vertical raster disk is on the left of horizontal axis, whereas the telescope and optical collimator are on the middle of it. Regarding the structure, the vertical raster disk must be installed accordingly to meet the following requirements:
a. the center of the vertical raster disk and the center of the horizontal raster disk must be positioned at the same point.
b. the reticle board of the vertical raster disk must be perpendicular to the horizontal axis.