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Proceedings Paper

Optic-electronic multi-matrix system for measuring the positions of the reflecting panels on the main mirror of the large radio-telescope
Author(s): Igor Konyakhin; Minh Hoa Tong
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Paper Abstract

The diameter of a main mirror of the large radiotelescope RT-70 (Suffa) is value 70 meters and it contains 1200 metal panels. The deformation of the radio telescope construction moves the reflecting panels, so it is necessary to measure these 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 for measuring the shift of the reflecting panel; 2) the problems of the of the multi-matrix measuring block designing. The great attention during the research was paid to the experimental approval of the theoretical results. The experimental setup had the following parameters: infrared emission diode by power 15 mWt as sources of radiation on the panel of mirror; the objective by the focal length 450 mm as aperture of receiver video-camera, the CMOS matrix receiver by type OV05610 Color CMOS QSXGA with 2592*1944 pixels and one pixel size (2.8*2.8) μm2 produced OmniVision as image 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.

Paper Details

Date Published: 21 June 2019
PDF: 7 pages
Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 110562J (21 June 2019); doi: 10.1117/12.2526133
Show Author Affiliations
Igor Konyakhin, ITMO Univ. (Russian Federation)
Minh Hoa Tong, ITMO Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 11056:
Optical Measurement Systems for Industrial Inspection XI
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves Jr., Editor(s)

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