The diameter of a main mirror of the large radiotelescope RT-70 (Suffa) is value 70 meters and it contains 1200 metalpanels. The deformation of the radio telescope construction moves the reflecting panels, so it is necessary to measurethese deviations from theoretical 3-D parabola. The permissible measuring error is not more 0.1 mm for distance 35 m.Following issues dealing with this problem are described in this article: 1) the new scheme of optic-electronic system formeasuring the shift of the reflecting panel; 2) the problems of the of the multi-matrix measuring block designing. Thegreat attention during the research was paid to the experimental approval of the theoretical results. The experimentalsetup had the following parameters: infrared emission diode by power 15 mWt as sources of radiation on the panel ofmirror; the objective by the focal length 450 mm as aperture of receiver video-camera, the CMOS matrix receiver bytype OV05610 Color CMOS QSXGA with 2592*1944 pixels and one pixel size (2.8*2.8) mm~2 produced OmniVision asimage analyze. The experimental error measurement was 0.07 mm at the range 20 mm on a working distance 20 m,which allows measuring the deformation of radiotelescope construction with the mirror diameter 70 m.
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