Patent ID: 8634135
Filing Date: 2014-01-21
Classification: G01C

Abstract:
1. An optical plummet for use in geodesy, the optical plummet comprising: an eyepiece; a target mark; and an objective; wherein the target mark is positioned in the beam path between the eyepiece and the objective, wherein the target mark and the eyepiece are supported by a first body and the objective is supported by a second body, wherein either the first body or second body has two annular recesses spaced apart from each other along the beam path between the eyepiece and the objective and disposed coaxially with respect to the beam path between the eyepiece and the objective, wherein each of the annular recesses accommodates a ring, and wherein the other body has at least sectionally a cylindrical outer surface extending coaxially through the two annular recesses and rings along the beam path between the eyepiece and the objective and is guided by the rings such that the distance between the eyepiece and the objective is adjustable by moving the first body and the second body relative to one another along the beam path between the eyepiece and the objective.