Arrangement for direction indication with digital levelling has line markers on eyepiece line plate with lines symmetrical to vertical line, central foot marking or point

摘要

The arrangement has a telescope with an objective and an eyepiece with an eyepiece lined plate mounted in the image plane of the eyepiece. The plate carries a vertical line (18;25), a horizontal line (21) crossing the vertical line in the centre and two symmetrical distance lines (19,20) symmetrically arranged wrt. the horizontal line and crossing the vertical line. At least one pair of other line markers (22;28,29) is arranged on the eyepiece line plate with lines symmetrical wrt. the vertical line and the foot of the measurement rod has a marking or point central wrt. the scale.