Absolute distance measuring device comprising • a transmission unit having ∘ at least one laser array , the laser array comprising multiple measurement laser emitters arranged along a laser array axis and configured to generate a beam pattern and ∘ a beam exit area , the transmission unit being configured to emit a plurality of transmission beams (T) via the beam exit area at different measurement angles, • and a receiver unit having ∘ a measurement beam entry area and ∘ at least one receiver array comprising multiple measurement receivers arranged along a receiver array axis, the receiver unit being designed ∘ for beam detection by a respective measurement receiver of at least one transmission beam of the plurality of transmission beams (T) returning via the beam entry area and ∘ for measuring of an absolute distance based on a respective detected transmission beam and the principle of time-of-flight, the absolute distance measuring device being characterized in that the laser array comprises at least a first reference laser emitter and the receiver array comprises at least a first reference receiver , the reference laser emitter and reference receiver defining an internal absolute distance reference beam path (72, 72a-c) of defined length for calibration of the device with respect to said measuring of absolute distance. • a transmission unit having ∘ at least one laser array , the laser array comprising multiple measurement laser emitters arranged along a laser array axis and configured to generate a beam pattern and ∘ a beam exit area , the transmission unit being configured to emit a plurality of transmission beams (T) via the beam exit area at different measurement angles, ∘ at least one laser array , the laser array comprising multiple measurement laser emitters arranged along a laser array axis and configured to generate a beam pattern and ∘ a beam exit area , • and a receiver unit having ∘ a measurement beam entry area and ∘ at least one receiver array comprising multiple measurement receivers arranged along a receiver array axis, the receiver unit being designed ∘ for beam detection by a respective measurement receiver of at least one transmission beam of the plurality of transmission beams (T) returning via the beam entry area and ∘ for measuring of an absolute distance based on a respective detected transmission beam and the principle of time-of-flight, the absolute distance measuring device being characterized in that the laser array comprises at least a first reference laser emitter and the receiver array comprises at least a first reference receiver , the reference laser emitter and reference receiver defining an internal absolute distance reference beam path (72, 72a-c) of defined length for calibration of the device with respect to said measuring of absolute distance. ∘ a measurement beam entry area and ∘ at least one receiver array comprising multiple measurement receivers arranged along a receiver array axis, ∘ for beam detection by a respective measurement receiver of at least one transmission beam of the plurality of transmission beams (T) returning via the beam entry area and ∘ for measuring of an absolute distance based on a respective detected transmission beam and the principle of time-of-flight, the absolute distance measuring device being characterized in that the laser array comprises at least a first reference laser emitter and the receiver array comprises at least a first reference receiver , the reference laser emitter and reference receiver defining an internal absolute distance reference beam path (72, 72a-c) of defined length for calibration of the device with respect to said measuring of absolute distance. <EOS>