Abstract: Some embodiments of the invention may relate to a rangefinder, in particular for a laser scanner, laser tracker, profiler, theodolite, or a total station. In a special embodiment of the invention, the light source of the rangefinder—provided for the emission of pulsed light signals—is configured here as an optical fiber amplifier (e.g. an EDFA, i.e. erbium-doped fiber amplifier) which is optically pumped by a superluminescent diode (SLD) operated in a pulsed manner.

Abstract: Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target, including a transmitter for sending out a pulse shaped optical radiation to the target as well as a receiver for an optical signal built for turning the optical signal to an electrical signal, and a filter with a transfer function for filtering the electrical signal whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital-converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data.

Abstract: The invention relates to a distance measuring method comprising at least the step of emitting at least one measurement signal to a target object, in which at least one start signal is produced, and the measurement signal is back scattered from the target object as a target signal. Said target signal and optionally also the start signal is sampled in a first and a second sampling at various sampling rates and determines the distance to the target object from the relative position from the start signal and the target signal.

Abstract: The invention relates to a distance measuring method comprising at least the step of emitting at least one measurement signal to a target object, in which at least one start signal is produced, and the measurement signal is back scattered from the target object as a target signal. Said target signal is sampled at a sampling frequency and the relative position of the start signal and the target signal is determined for deriving a distance to the target object from the relative position from the start signal and the target signal. The sampling frequency can be adjusted and is set in accordance with a large distance to the target object.

Abstract: Some embodiments of the invention relate to a method for measuring spatial points with a laser scanner. The method may include: scanning multiple spatial points on an object; determining coordinates of the respective spatial point, determining a close range about a central spatial point with at least two spatial points whose angle coordinates are in a defined angular space adjacent to those of the central spatial point; aggregating coordinates of the spatial points in the specific close range; and replacing coordinates of the central spatial point by aggregating coordinates of the spatial points in the specific close range. In some embodiments, the laser scanner forms the origin of the coordinates, and the coordinates comprise a distance and at least one angle.

Abstract: Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target, including a transmitter for sending out a pulse shaped optical radiation to the target as well as a receiver for an optical signal built for turning the optical signal to an electrical signal, and a filter with a transfer function for filtering the electrical signal whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital-converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data.

Abstract: A total station including an electro-optical distance measuring unit and a scanning functionality is disclosed. The total station may include an analysis unit for analysis of the registered measuring signal data and conversion thereof into scanning points for a point cloud, whereby a point cloud having the scanning points can be generated. The distance measuring unit may be configured in such a manner that the distance measurement can be carried out by means of runtime measurement and/or waveform digitizing (WFD). In addition, the total station may have a program storage unit which may provide at least two scanning modes, wherein the at least two scanning modes differ at least in a measuring rate such as, for example, in the number of scanning points per unit of time.

Abstract: Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target, including a transmitter for sending out a pulse shaped optical radiation to the target as well as a receiver for an optical signal built for turning the optical signal to an electrical signal, and a filter with a transfer function for filtering the electrical signal whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital-converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data.

Abstract: The invention relates to a transimpedance amplifier circuit for converting an input current into an output voltage Uout?, comprising an amplifier element (4) having at least one signal input and an output having the output voltage Uout. For this purpose, the transimpedance amplifier circuit has a T-shaped feedback network divided into at least a first branch (1), a second branch (2) and a third branch (3), which is connected in series with the first branch (1), thus producing a node (K). The first branch (1) has a non-reactive resistance (R1) and is connected to the output at one end and the node (K) at the other end. The second branch (2) has at least one capacitance C2 and is connected to the node (K) at one end and in particular to an earth at the other end, and the third branch (3) has at least one capacitance C3 and is connected to the node (K) at one end and to the signal input at the other end. As a result, a capacitive current division is effected at the node (K).

Abstract: Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target, including a transmitter for sending out a pulse shaped optical radiation to the target as well as a receiver for an optical signal built for turning the optical signal to an electrical signal, and a filter with a transfer function for filtering the electrical signal whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital-converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data.

Abstract: The invention relates to a transimpedance amplifier circuit for converting an input current into an output voltage Uout?, comprising an amplifier element (4) having at least one signal input and an output having the output voltage Uout. For this purpose, the transimpedance amplifier circuit has a T-shaped feedback network divided into at least a first branch (1), a second branch (2) and a third branch (3), which is connected in series with the first branch (1), thus producing a node (K). The first branch (1) has a non-reactive resistance (R1) and is connected to the output at one end and the node (K) at the other end. The second branch (2) has at least one capacitance C2 and is connected to the node (K) at one end and in particular to an earth at the other end, and the third branch (3) has at least one capacitance C3 and is connected to the node (K) at one end and to the signal input at the other end. As a result, a capacitive current division is effected at the node (K).

Abstract: An electro-optical range finder (4) having a trapezoidal laser (1) as a laser source, a laser source controller (6) for generating pulsed laser radiation, receiving optics (7) and a detector (8) with an evaluation unit (9) for receiving and evaluating the measuring radiation (RS) reflected by a target (ZI), in order to measure distance, has a separate supply for the guided waveguide region (2) and the trapezoidal region (3) as well as transmitting optics (5) with astigmatism compensation and for collimating the laser radiation.

Abstract: An electro-optical range finder (4) having a trapezoidal laser (1) as a laser source, a laser source controller (6) for generating pulsed laser radiation, receiving optics (7) and a detector (8) with an evaluation unit (9) for receiving and evaluating the measuring radiation (RS) reflected by a target (ZI), in order to measure distance, has a separate supply for the guided waveguide region (2) and the trapezoidal region (3) as well as transmitting optics (5) with astigmatism compensation and for collimating the laser radiation.