Optic-electronic multi-matrix system for measuring the positions of the reflecting panels on the main mirror of the large radio-telescope

Igor Konyakhin; Minh Hoa Tong

doi:10.1117/12.2526133

21 June 2019 Optic-electronic multi-matrix system for measuring the positions of the reflecting panels on the main mirror of the large radio-telescope

Igor Konyakhin, Minh Hoa Tong

Author Affiliations +

Proceedings Volume 11056, Optical Measurement Systems for Industrial Inspection XI; 110562J (2019) https://doi.org/10.1117/12.2526133
Event: SPIE Optical Metrology, 2019, Munich, Germany

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.

Citation Download Citation

Igor Konyakhin and Minh Hoa Tong "Optic-electronic multi-matrix system for measuring the positions of the reflecting panels on the main mirror of the large radio-telescope", Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 110562J (21 June 2019); https://doi.org/10.1117/12.2526133

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available