Computer modeling of the optic-electronic system for deformation measurement of radio-telescope counter-reflector

Details Computer modeling of the optic-electronic system for deformation measurement of radio-telescope counter-reflector Computer modeling of the optic-electronic system for deformation measurement of radio-telescope counter-reflector

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7133e.139k&link_type=abstract

Fifth International Symposium on Instrumentation Science and Technology. Edited by Kaliteevskiy, Ilya; Konyakhin, Igor. Procee

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Scientific paper

The metrological support of many measurement tasks requires measuring spatial position of some objects in respect to rigid base. The microwave radio-telescope development requires high-precision control of the position of the counterreflector. The construction elements weight and thermal deformation leads to changes of position and linear shift of each planar section in respect to ideal parabolic shape. In this case it is necessary to implement control system for measuring these deformations of the reflector. For determination of the actual shape of the reflector control objects (light-emitting diodes, LED) placed on the reflector, and their coordinates in respect to motionless construction element (base ring placed on the top main mirror) are measured by triangulation method using CCD camera, which determines vision angles of LEDs. Analysis of relations of primary errors of measurements and errors of determinations of actual coordinates of the reflectors confirm feasibility of the whole system of control of the shape of counter-reflector.

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