| abstract |
The invention relates to an optical surveying device 11 with a base 1 for erecting the surveying device 11 and a relative to the base 1 about two axes 7,8 rotatable targeting unit 3, which defines a target axis 9 for targeting a target object 40 to be measured. The targeting unit 3 has a first beam path 10z for emitting optical radiation 10 in the direction of the target object 40 to be measured and a second beam path 10y for receiving a portion of the optical radiation 10 reflected by the target object 40 through an optoelectronic receiving element.n n n According to the invention, at least one of the beam paths 10z, 10y has an optical element 30 which is formed with an optically transparent, deformable volume body 63 which has at least one interface 63g towards a medium with an optical refractive index deviating from the volume body 63.n n n In this case, the interface 63g is deformable by means of a plurality of electrical drive signals 31a, 31b, 31c, 31d in such a way that the optical refractive properties of the element can be varied differently in at least two non-coincident directions 31a, 31b, 31c, 31d. |