This work presents the results of experimental researches on the influence caused by cold water effecting on the structure of laser ligt propagated in the water environment. Practical experiments have been executed by the use of measuring unit consisting of the geodetic laser instrument LFG-1, temperature sensor, optical set (roof prism, prismatic reflector and the CCD camera) and also a transparent vessel. For 2400 observations a functional relation and a corelation factor between the temperature increase inside the vessel and the greyness-degree of propagated laser beam’s forehead has been determined.

85-92