Electro-optical range finder

Abstract

An electro-optical range finder (4) has 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.

Description

technical field [0001] The invention relates to an electro-optical distance measuring device according to the preamble of claim 1, a measuring device with such a distance measuring device, and an electro-optical distance measuring device according to the preamble of claim 12 in which pulses are generated. Laser beam method. Background technique [0002] In many geodetic applications it is necessary or advantageous to emit laser light. This relates in particular to electro-optical distance measurement with a geodetic accuracy usually in the millimeter or submillimeter range, which can be achieved, for example, by means of the pulse transit time measurement principle or the phase measurement principle. Suitable methods and systems of this type for distance measurement are described, for example, in EP 0738 899 B1 or WO2004 / 074773. [0003] Geodetic applications require ranging over relatively large distances, which places high demands on the beam source. It is advantageous ...

AI Technical Summary

Problems solved by technology

However, such microchip solid-state lasers have the disadvantages of large size, high power consumption and poor operating characteristics such as due to thermal effects

Therefore, in practice, the applicability of this solution for use in site surveys is limited

[0013] Diode-pumped solid-state lasers meet the requirements in terms of beam quality and peak power, but are very complex in principle (pump laser with drive unit, entrance optics, amplification medium, mass circuit, resonator) and are very expensive

Furthermore, these solid-state lasers also generally do not allow a flexible adjustment of the pulse rate, since this is limited at low efficiencies due to the high thermal load

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