High accuracy shift control of the large-size constructions (such as turbine or radio telescopes elements) is one of the
tasks that could be solved by means of the optical-electronic autoreflection measurement system. The description of the
system built on the autoreflection optical scheme with CCD-sensor, its design, accuracy characteristics and testing
results are presented. The point image center determination algorithm with accuracy within 0.05 pixel as well as
coordinate system conversion method and the results of theoretical estimate of total system's accuracy are also
described. Influence analysis of optical components decenterings on the system's total error and sighting line
displacement is also described. It is shown that decentering of focusing optical element is the primary impact. Precision
characteristics were approved during the experiment; total error did not exceed 0.1 mm at a distance of 20 m.
In this work, design, implementation and test of a system intended for positioning of the elements of
turbine units relative to the line of shaft with high precision, are discussed. A procedure of the
conversion of coordinates from the instrument system into the system connected with the practical
position of the axis of turbine has been devised. It is shown that optoelectronic systems of aligment built
by autoreflexive scheme can be used for high precision measurements.