The invention relates to the field of measuring technique, in particular, the optical distance measurements with high accuracy to the topographic features or spatially distributed atmospheric aerosol.; The utility model aims to improve the sensitivity and reliability of the range finder.; Known heterodyne laser rangefinder consisting of a control unit transmitting and receiving fiber optic path, a transmission path which has a laser light source, a fiber optic splitter, a modulator, an optical amplifier, transceiver and circulator telescope. Rangefinder has a receiving path comprising optical fiber adder for summing the reference radiation scattered radiation entering through the transceiving telescope and the direction to the detecting receiver.; In accordance with the utility model as a laser light source is used a coherent source of laser radiation, as a circulator, the circulator is used with a polarization-maintaining, wherein the detecting is performed by a balanced receiver circuit.; Proposed heterodyne laser rangefinder can improve reception performance of the echo by 2 times.; The utility model can be used in geodesy, mobile environmental monitoring, mapping, including mapping of clouds and terrain at night. (1. n.p.f., z.p.f 1, Figure 1.).
展开▼
