Abstract: A north-referenceable goniometer for azimuthal orientation determination of a sighting device has a base, a rotary part, a rotation angle encoder for determining a rotational position of the rotary part about an upright axis, a gyroscope fixed on the rotary part and having a measuring device oriented orthogonally to the upright axis for determining a component of the Earth rotation vector, and an evaluation unit for determining the azimuthal angle of the geographical north pole. The goniometer also includes an acceleration sensor, and the evaluation unit is formed such that, using the evaluation unit, the determined component of the Earth rotation vector is corrected by a sink rate of the goniometer, determined with the aid of the acceleration sensor, and a systematic measurement error of the gyroscope is corrected by determining measurement values of the component of the Earth rotation vector in at least three different rotational positions.

Abstract: The invention relates to an electro-optical distance measuring device comprising a transmitting unit comprising a light source for emitting intensity-modulated optical radiation, a receiving unit for receiving a portion of the optical radiation, said portion being reflected from a target object, by means of a photosensitive electrical component and for converting it into an electrical reception signal. Furthermore comprising a conditioning unit for conditioning the reception signal comprising at least one amplifier stage, an analogue-to-digital converter fox digitizing the conditioned reception signal, and an electronic evaluation unit, which is designed in such a way that a distance from the distance measuring device to the target object, can be determined on the basis of a signal propagation time with the aid of the digitized reception signal. According to the invention, in this case the amplifier stage is designed in such a way that it has a non-linear input-output characteristic.

Abstract: A goniometer has a base defining a standing axis, a structure rotatable around the standing axis relative to the base, an angle encoder, and a control and processing unit. The structure has a graphic electronic information display arrangement having at least two display zones for displaying user guidance information and/or measuring information, a first of the at least two display zones being arranged in a first radial alignment relative to the standing axis on the structure. A second of the at least two display zones of the information display means is arranged in a second radial alignment relative to the standing axis on the structure, the first radial alignment and the second radial alignment enclosing an angle of at least 90°. The at least two display zones are automatically individually activated by the control and processing unit as a function of a fulfillment of a stored angular position criterion.